1 from bindingstypes import *
10 def __init__(self, DEBUG: bool, target: Target, **kwargs):
12 self.c_array_class_caches = set()
13 self.c_type_map = dict(
20 self.to_hu_conv_templates = dict(
21 ptr = '{human_type} {var_name}_hu_conv = null; if ({var_name} < 0 || {var_name} > 4096) { {var_name}_hu_conv = new {human_type}(null, {var_name}); }',
22 default = '{human_type} {var_name}_hu_conv = null; if ({var_name} < 0 || {var_name} > 4096) { {var_name}_hu_conv = new {human_type}(null, {var_name}); }'
25 self.bindings_header = """package org.ldk.impl;
26 import org.ldk.enums.*;
27 import org.ldk.impl.version;
29 import java.io.InputStream;
30 import java.io.IOException;
31 import java.nio.file.Files;
32 import java.nio.file.Path;
33 import java.nio.file.StandardCopyOption;
35 public class bindings {
36 public static class VecOrSliceDef {
40 public VecOrSliceDef(long dataptr, long datalen, long stride) {
41 this.dataptr = dataptr; this.datalen = datalen; this.stride = stride;
46 // Try to load natively first, this works on Android and in testing.
47 System.loadLibrary(\"lightningjni\");
48 } catch (UnsatisfiedLinkError system_load_err) {
49 // Otherwise try to load from the library jar.
50 File tmpdir = new File(System.getProperty("java.io.tmpdir"), "ldk-java-nativelib");
51 tmpdir.mkdir(); // If it fails to create, assume it was there already
52 tmpdir.deleteOnExit();
53 String libname = "liblightningjni_" + System.getProperty("os.name").replaceAll(" ", "") +
54 "-" + System.getProperty("os.arch").replaceAll(" ", "") + ".nativelib";
55 try (InputStream is = bindings.class.getResourceAsStream("/" + libname)) {
56 Path libpath = new File(tmpdir.toPath().toString(), "liblightningjni.so").toPath();
57 Files.copy(is, libpath, StandardCopyOption.REPLACE_EXISTING);
58 Runtime.getRuntime().load(libpath.toString());
59 } catch (Exception e) {
60 System.err.println("Failed to load LDK native library.");
61 System.err.println("System LDK native library load failed with: " + system_load_err);
62 System.err.println("Resource-based LDK native library load failed with: " + e);
63 throw new IllegalArgumentException(e);
66 init(java.lang.Enum.class, VecOrSliceDef.class);
68 if (!get_lib_version_string().equals(version.get_ldk_java_bindings_version()))
69 throw new IllegalArgumentException("Compiled LDK library and LDK class failes do not match");
70 // Fetching the LDK versions from C also checks that the header and binaries match
71 get_ldk_c_bindings_version();
74 static native void init(java.lang.Class c, java.lang.Class slicedef);
75 static native void init_class_cache();
76 static native String get_lib_version_string();
78 public static native String get_ldk_c_bindings_version();
79 public static native String get_ldk_version();
81 public static native boolean deref_bool(long ptr);
82 public static native long deref_long(long ptr);
83 public static native void free_heap_ptr(long ptr);
84 public static native byte[] read_bytes(long ptr, long len);
85 public static native byte[] get_u8_slice_bytes(long slice_ptr);
86 public static native long bytes_to_u8_vec(byte[] bytes);
87 public static native long new_txpointer_copy_data(byte[] txdata);
88 public static native void txpointer_free(long ptr);
89 public static native byte[] txpointer_get_buffer(long ptr);
90 public static native long vec_slice_len(long vec);
91 public static native long new_empty_slice_vec();
94 self.bindings_version_file = """package org.ldk.impl;
96 public class version {
97 public static String get_ldk_java_bindings_version() {
98 return "<git_version_ldk_garbagecollected>";
102 self.bindings_footer = "}\n"
104 self.util_fn_pfx = """package org.ldk.structs;
105 import org.ldk.impl.bindings;
106 import org.ldk.enums.*;
107 import org.ldk.util.*;
108 import java.util.Arrays;
109 import java.lang.ref.Reference;
110 import javax.annotation.Nullable;
112 public class UtilMethods {
114 self.util_fn_sfx = "}"
115 self.common_base = """package org.ldk.structs;
116 import java.util.LinkedList;
119 LinkedList<Object> ptrs_to = new LinkedList();
120 protected CommonBase(long ptr) { assert ptr < 0 || ptr > 4096; this.ptr = ptr; }
124 self.c_file_pfx = """#include <jni.h>
125 // On OSX jlong (ie long long) is not equivalent to int64_t, so we override here
126 #define int64_t jlong
127 #include \"org_ldk_impl_bindings.h\"
128 #include <lightning.h>
130 #include <stdatomic.h>
133 #define LIKELY(v) __builtin_expect(!!(v), 1)
134 #define UNLIKELY(v) __builtin_expect(!!(v), 0)
138 if self.target == Target.ANDROID:
139 self.c_file_pfx = self.c_file_pfx + """
140 #include <android/log.h>
141 #define DEBUG_PRINT(...) __android_log_print(ANDROID_LOG_ERROR, "LDK", __VA_ARGS__)
145 static void* redirect_stderr(void* ignored) {
148 dup2(pipes[1], STDERR_FILENO);
150 memset(buf, 0, 8192);
152 while ((len = read(pipes[0], buf, 8191)) > 0) {
153 DEBUG_PRINT("%s\\n", buf);
154 memset(buf, 0, 8192);
156 DEBUG_PRINT("End of stderr???\\n");
159 void __attribute__((constructor)) spawn_stderr_redirection() {
161 pthread_create(&thread, NULL, &redirect_stderr, NULL);
165 self.c_file_pfx = self.c_file_pfx + "#define DEBUG_PRINT(...) fprintf(stderr, __VA_ARGS__)\n"
167 if not DEBUG or sys.platform == "darwin":
168 self.c_file_pfx = self.c_file_pfx + """#define MALLOC(a, _) malloc(a)
169 #define FREE(p) if ((uint64_t)(p) > 4096) { free(p); }
170 #define CHECK_ACCESS(p)
171 #define CHECK_INNER_FIELD_ACCESS_OR_NULL(v)
174 self.c_file_pfx += """#define DO_ASSERT(a) (void)(a)
178 self.c_file_pfx = self.c_file_pfx + """#include <assert.h>
179 // Always run a, then assert it is true:
180 #define DO_ASSERT(a) do { bool _assert_val = (a); assert(_assert_val); } while(0)
181 // Assert a is true or do nothing
182 #define CHECK(a) DO_ASSERT(a)
184 void __attribute__((constructor)) debug_log_version() {
185 if (check_get_ldk_version() == NULL)
186 DEBUG_PRINT("LDK version did not match the header we built against\\n");
187 if (check_get_ldk_bindings_version() == NULL)
188 DEBUG_PRINT("LDK C Bindings version did not match the header we built against\\n");
189 DEBUG_PRINT("Loaded LDK-Java Bindings with LDK %s and LDK-C-Bindings %s\\n", check_get_ldk_version(), check_get_ldk_bindings_version());
193 if sys.platform != "darwin":
194 self.c_file_pfx += """
195 // Running a leak check across all the allocations and frees of the JDK is a mess,
196 // so instead we implement our own naive leak checker here, relying on the -wrap
197 // linker option to wrap malloc/calloc/realloc/free, tracking everyhing allocated
198 // and free'd in Rust or C across the generated bindings shared library.
202 if self.target == Target.ANDROID:
203 self.c_file_pfx = self.c_file_pfx + """
207 // Implement the execinfo functions using _Unwind_backtrace. This seems to miss many Rust
208 // symbols, so we only use it on Android, where execinfo.h is unavailable.
210 struct BacktraceState {
214 static _Unwind_Reason_Code unwind_callback(struct _Unwind_Context* context, void* arg) {
215 struct BacktraceState* state = (struct BacktraceState*)arg;
216 uintptr_t pc = _Unwind_GetIP(context);
218 if (state->current == state->end) {
219 return _URC_END_OF_STACK;
221 *state->current++ = (void*)(pc);
224 return _URC_NO_REASON;
227 int backtrace(void** buffer, int max) {
228 struct BacktraceState state = { buffer, buffer + max };
229 _Unwind_Backtrace(unwind_callback, &state);
230 return state.current - buffer;
233 void backtrace_symbols_fd(void ** buffer, int count, int _fd) {
234 for (int idx = 0; idx < count; ++idx) {
236 if (dladdr(buffer[idx], &info) && info.dli_sname) {
237 DEBUG_PRINT("%p: %s", buffer[idx], info.dli_sname);
239 DEBUG_PRINT("%p: ???", buffer[idx]);
245 self.c_file_pfx = self.c_file_pfx + "#include <execinfo.h>\n"
246 self.c_file_pfx = self.c_file_pfx + """
249 static pthread_mutex_t allocation_mtx;
251 void __attribute__((constructor)) init_mtx() {
252 DO_ASSERT(!pthread_mutex_init(&allocation_mtx, NULL));
256 typedef struct allocation {
257 struct allocation* next;
259 const char* struct_name;
262 unsigned long alloc_len;
264 static allocation* allocation_ll = NULL;
266 void* __real_malloc(size_t len);
267 void* __real_calloc(size_t nmemb, size_t len);
268 static void new_allocation(void* res, const char* struct_name, size_t len) {
269 allocation* new_alloc = __real_malloc(sizeof(allocation));
270 new_alloc->ptr = res;
271 new_alloc->struct_name = struct_name;
272 new_alloc->bt_len = backtrace(new_alloc->bt, BT_MAX);
273 new_alloc->alloc_len = len;
274 DO_ASSERT(!pthread_mutex_lock(&allocation_mtx));
275 new_alloc->next = allocation_ll;
276 allocation_ll = new_alloc;
277 DO_ASSERT(!pthread_mutex_unlock(&allocation_mtx));
279 static void* MALLOC(size_t len, const char* struct_name) {
280 void* res = __real_malloc(len);
281 new_allocation(res, struct_name, len);
284 void __real_free(void* ptr);
285 static void alloc_freed(void* ptr) {
286 allocation* p = NULL;
287 DO_ASSERT(!pthread_mutex_lock(&allocation_mtx));
288 allocation* it = allocation_ll;
289 while (it->ptr != ptr) {
290 p = it; it = it->next;
292 DEBUG_PRINT("ERROR: Tried to free unknown pointer %p at:\\n", ptr);
294 int bt_len = backtrace(bt, BT_MAX);
295 backtrace_symbols_fd(bt, bt_len, STDERR_FILENO);
296 DEBUG_PRINT("\\n\\n");
297 DO_ASSERT(!pthread_mutex_unlock(&allocation_mtx));
298 return; // addrsan should catch malloc-unknown and print more info than we have
301 if (p) { p->next = it->next; } else { allocation_ll = it->next; }
302 DO_ASSERT(!pthread_mutex_unlock(&allocation_mtx));
303 DO_ASSERT(it->ptr == ptr);
306 static void FREE(void* ptr) {
307 if ((uint64_t)ptr <= 4096) return; // Rust loves to create pointers to the NULL page for dummys
312 void* __wrap_malloc(size_t len) {
313 void* res = __real_malloc(len);
314 new_allocation(res, "malloc call", len);
317 void* __wrap_calloc(size_t nmemb, size_t len) {
318 void* res = __real_calloc(nmemb, len);
319 new_allocation(res, "calloc call", len);
322 void __wrap_free(void* ptr) {
323 if (ptr == NULL) return;
328 static void CHECK_ACCESS(const void* ptr) {
329 DO_ASSERT(!pthread_mutex_lock(&allocation_mtx));
330 allocation* it = allocation_ll;
331 while (it->ptr != ptr) {
334 DEBUG_PRINT("ERROR: Tried to access unknown pointer %p at:\\n", ptr);
336 int bt_len = backtrace(bt, BT_MAX);
337 backtrace_symbols_fd(bt, bt_len, STDERR_FILENO);
338 DEBUG_PRINT("\\n\\n");
339 DO_ASSERT(!pthread_mutex_unlock(&allocation_mtx));
340 return; // addrsan should catch and print more info than we have
343 DO_ASSERT(!pthread_mutex_unlock(&allocation_mtx));
345 #define CHECK_INNER_FIELD_ACCESS_OR_NULL(v) \\
346 if (v.is_owned && v.inner != NULL) { \\
347 const void *p = __unmangle_inner_ptr(v.inner); \\
353 void* __real_realloc(void* ptr, size_t newlen);
354 void* __wrap_realloc(void* ptr, size_t len) {
355 if (ptr != NULL) alloc_freed(ptr);
356 void* res = __real_realloc(ptr, len);
357 new_allocation(res, "realloc call", len);
360 void __wrap_reallocarray(void* ptr, size_t new_sz) {
361 // Rust doesn't seem to use reallocarray currently
365 void __attribute__((destructor)) check_leaks() {
366 unsigned long alloc_count = 0;
367 unsigned long alloc_size = 0;
368 DEBUG_PRINT("The following LDK-allocated blocks still remain.\\n");
369 DEBUG_PRINT("Note that this is only accurate if System.gc(); System.runFinalization()\\n");
370 DEBUG_PRINT("was called prior to exit after all LDK objects were out of scope.\\n");
371 for (allocation* a = allocation_ll; a != NULL; a = a->next) {
372 DEBUG_PRINT("%s %p (%lu bytes) remains:\\n", a->struct_name, a->ptr, a->alloc_len);
373 backtrace_symbols_fd(a->bt, a->bt_len, STDERR_FILENO);
374 DEBUG_PRINT("\\n\\n");
376 alloc_size += a->alloc_len;
378 DEBUG_PRINT("%lu allocations remained for %lu bytes.\\n", alloc_count, alloc_size);
379 DEBUG_PRINT("Note that this is only accurate if System.gc(); System.runFinalization()\\n");
380 DEBUG_PRINT("was called prior to exit after all LDK objects were out of scope.\\n");
383 self.c_file_pfx = self.c_file_pfx + """
384 static jmethodID ordinal_meth = NULL;
385 static jmethodID slicedef_meth = NULL;
386 static jclass slicedef_cls = NULL;
387 JNIEXPORT void Java_org_ldk_impl_bindings_init(JNIEnv * env, jclass _b, jclass enum_class, jclass slicedef_class) {
388 ordinal_meth = (*env)->GetMethodID(env, enum_class, "ordinal", "()I");
389 CHECK(ordinal_meth != NULL);
390 slicedef_meth = (*env)->GetMethodID(env, slicedef_class, "<init>", "(JJJ)V");
391 CHECK(slicedef_meth != NULL);
392 slicedef_cls = (*env)->NewGlobalRef(env, slicedef_class);
393 CHECK(slicedef_cls != NULL);
396 JNIEXPORT jboolean JNICALL Java_org_ldk_impl_bindings_deref_1bool (JNIEnv * env, jclass _a, jlong ptr) {
397 return *((bool*)ptr);
399 JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_deref_1long (JNIEnv * env, jclass _a, jlong ptr) {
400 return *((long*)ptr);
402 JNIEXPORT void JNICALL Java_org_ldk_impl_bindings_free_1heap_1ptr (JNIEnv * env, jclass _a, jlong ptr) {
405 JNIEXPORT jbyteArray JNICALL Java_org_ldk_impl_bindings_read_1bytes (JNIEnv * env, jclass _b, jlong ptr, jlong len) {
406 jbyteArray ret_arr = (*env)->NewByteArray(env, len);
407 (*env)->SetByteArrayRegion(env, ret_arr, 0, len, (unsigned char*)ptr);
410 JNIEXPORT jbyteArray JNICALL Java_org_ldk_impl_bindings_get_1u8_1slice_1bytes (JNIEnv * env, jclass _b, jlong slice_ptr) {
411 LDKu8slice *slice = (LDKu8slice*)slice_ptr;
412 jbyteArray ret_arr = (*env)->NewByteArray(env, slice->datalen);
413 (*env)->SetByteArrayRegion(env, ret_arr, 0, slice->datalen, slice->data);
416 JNIEXPORT int64_t impl_bindings_bytes_1to_1u8_1vec (JNIEnv * env, jclass _b, jbyteArray bytes) {
417 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)MALLOC(sizeof(LDKCVec_u8Z), "LDKCVec_u8");
418 vec->datalen = (*env)->GetArrayLength(env, bytes);
419 vec->data = (uint8_t*)MALLOC(vec->datalen, "LDKCVec_u8Z Bytes");
420 (*env)->GetByteArrayRegion (env, bytes, 0, vec->datalen, vec->data);
421 return (uint64_t)vec;
423 JNIEXPORT jbyteArray JNICALL Java_org_ldk_impl_bindings_txpointer_1get_1buffer (JNIEnv * env, jclass _b, jlong ptr) {
424 LDKTransaction *txdata = (LDKTransaction*)ptr;
426 slice.data = txdata->data;
427 slice.datalen = txdata->datalen;
428 return Java_org_ldk_impl_bindings_get_1u8_1slice_1bytes(env, _b, (uint64_t)&slice);
430 JNIEXPORT int64_t JNICALL Java_org_ldk_impl_bindings_new_1txpointer_1copy_1data (JNIEnv * env, jclass _b, jbyteArray bytes) {
431 LDKTransaction *txdata = (LDKTransaction*)MALLOC(sizeof(LDKTransaction), "LDKTransaction");
432 txdata->datalen = (*env)->GetArrayLength(env, bytes);
433 txdata->data = (uint8_t*)MALLOC(txdata->datalen, "Tx Data Bytes");
434 txdata->data_is_owned = false;
435 (*env)->GetByteArrayRegion (env, bytes, 0, txdata->datalen, txdata->data);
436 return (uint64_t)txdata;
438 JNIEXPORT void JNICALL Java_org_ldk_impl_bindings_txpointer_1free (JNIEnv * env, jclass _b, jlong ptr) {
439 LDKTransaction *tx = (LDKTransaction*)ptr;
440 tx->data_is_owned = true;
441 Transaction_free(*tx);
444 JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_vec_1slice_1len (JNIEnv * env, jclass _a, jlong ptr) {
445 // Check offsets of a few Vec types are all consistent as we're meant to be generic across types
446 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_SignatureZ, datalen), "Vec<*> needs to be mapped identically");
447 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_MessageSendEventZ, datalen), "Vec<*> needs to be mapped identically");
448 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_EventZ, datalen), "Vec<*> needs to be mapped identically");
449 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_C2Tuple_usizeTransactionZZ, datalen), "Vec<*> needs to be mapped identically");
450 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)ptr;
451 return (uint64_t)vec->datalen;
453 JNIEXPORT int64_t JNICALL Java_org_ldk_impl_bindings_new_1empty_1slice_1vec (JNIEnv * env, jclass _b) {
454 // Check sizes of a few Vec types are all consistent as we're meant to be generic across types
455 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_SignatureZ), "Vec<*> needs to be mapped identically");
456 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_MessageSendEventZ), "Vec<*> needs to be mapped identically");
457 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_EventZ), "Vec<*> needs to be mapped identically");
458 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_C2Tuple_usizeTransactionZZ), "Vec<*> needs to be mapped identically");
459 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)MALLOC(sizeof(LDKCVec_u8Z), "Empty LDKCVec");
462 return (uint64_t)vec;
465 // We assume that CVec_u8Z and u8slice are the same size and layout (and thus pointers to the two can be mixed)
466 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKu8slice), "Vec<u8> and [u8] need to have been mapped identically");
467 _Static_assert(offsetof(LDKCVec_u8Z, data) == offsetof(LDKu8slice, data), "Vec<u8> and [u8] need to have been mapped identically");
468 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKu8slice, datalen), "Vec<u8> and [u8] need to have been mapped identically");
470 _Static_assert(sizeof(jlong) == sizeof(int64_t), "We assume that j-types are the same as C types");
471 _Static_assert(sizeof(jbyte) == sizeof(char), "We assume that j-types are the same as C types");
472 _Static_assert(sizeof(void*) <= 8, "Pointers must fit into 64 bits");
474 typedef jlongArray int64_tArray;
475 typedef jbyteArray int8_tArray;
477 static inline jstring str_ref_to_java(JNIEnv *env, const char* chars, size_t len) {
478 // Sadly we need to create a temporary because Java can't accept a char* without a 0-terminator
479 char* conv_buf = MALLOC(len + 1, "str conv buf");
480 memcpy(conv_buf, chars, len);
482 jstring ret = (*env)->NewStringUTF(env, conv_buf);
486 static inline LDKStr java_to_owned_str(JNIEnv *env, jstring str) {
487 uint64_t str_len = (*env)->GetStringUTFLength(env, str);
488 char* newchars = MALLOC(str_len + 1, "String chars");
489 const char* jchars = (*env)->GetStringUTFChars(env, str, NULL);
490 memcpy(newchars, jchars, str_len);
491 newchars[str_len] = 0;
492 (*env)->ReleaseStringUTFChars(env, str, jchars);
496 .chars_is_owned = true
501 JNIEXPORT jstring JNICALL Java_org_ldk_impl_bindings_get_1ldk_1c_1bindings_1version(JNIEnv *env, jclass _c) {
502 return str_ref_to_java(env, check_get_ldk_bindings_version(), strlen(check_get_ldk_bindings_version()));
504 JNIEXPORT jstring JNICALL Java_org_ldk_impl_bindings_get_1ldk_1version(JNIEnv *env, jclass _c) {
505 return str_ref_to_java(env, check_get_ldk_version(), strlen(check_get_ldk_version()));
509 self.c_version_file = """JNIEXPORT jstring JNICALL Java_org_ldk_impl_bindings_get_1lib_1version_1string(JNIEnv *env, jclass _c) {
510 return str_ref_to_java(env, "<git_version_ldk_garbagecollected>", strlen("<git_version_ldk_garbagecollected>"));
513 self.hu_struct_file_prefix = """package org.ldk.structs;
515 import org.ldk.impl.bindings;
516 import org.ldk.enums.*;
517 import org.ldk.util.*;
518 import java.util.Arrays;
519 import java.lang.ref.Reference;
520 import javax.annotation.Nullable;
523 self.c_fn_ty_pfx = "JNIEXPORT "
524 self.c_fn_args_pfx = "JNIEnv *env, jclass clz"
525 self.file_ext = ".java"
526 self.ptr_c_ty = "int64_t"
527 self.ptr_native_ty = "long"
528 self.result_c_ty = "jclass"
529 self.ptr_arr = "jobjectArray"
530 self.is_arr_some_check = ("", " != NULL")
531 self.get_native_arr_len_call = ("(*env)->GetArrayLength(env, ", ")")
533 def construct_jenv(self):
534 res = "JNIEnv *env;\n"
535 res += "jint get_jenv_res = (*j_calls->vm)->GetEnv(j_calls->vm, (void**)&env, JNI_VERSION_1_6);\n"
536 res += "if (get_jenv_res == JNI_EDETACHED) {\n"
537 if self.target == Target.ANDROID:
538 res += "\tDO_ASSERT((*j_calls->vm)->AttachCurrentThread(j_calls->vm, &env, NULL) == JNI_OK);\n"
540 res += "\tDO_ASSERT((*j_calls->vm)->AttachCurrentThread(j_calls->vm, (void**)&env, NULL) == JNI_OK);\n"
542 res += "\tDO_ASSERT(get_jenv_res == JNI_OK);\n"
545 def deconstruct_jenv(self):
546 res = "if (get_jenv_res == JNI_EDETACHED) {\n"
547 res += "\tDO_ASSERT((*j_calls->vm)->DetachCurrentThread(j_calls->vm) == JNI_OK);\n"
551 def release_native_arr_ptr_call(self, ty_info, arr_var, arr_ptr_var):
552 if ty_info.subty is None or not ty_info.subty.c_ty.endswith("Array"):
553 return "(*env)->ReleasePrimitiveArrayCritical(env, " + arr_var + ", " + arr_ptr_var + ", 0)"
555 def create_native_arr_call(self, arr_len, ty_info):
556 if ty_info.c_ty == "int8_tArray":
557 return "(*env)->NewByteArray(env, " + arr_len + ")"
558 elif ty_info.subty.c_ty.endswith("Array"):
559 clz_var = ty_info.java_fn_ty_arg[1:].replace("[", "arr_of_")
560 self.c_array_class_caches.add(clz_var)
561 return "(*env)->NewObjectArray(env, " + arr_len + ", " + clz_var + "_clz, NULL);\n"
563 return "(*env)->New" + ty_info.java_ty.strip("[]").title() + "Array(env, " + arr_len + ")"
564 def set_native_arr_contents(self, arr_name, arr_len, ty_info):
565 if ty_info.c_ty == "int8_tArray":
566 return ("(*env)->SetByteArrayRegion(env, " + arr_name + ", 0, " + arr_len + ", ", ")")
569 def get_native_arr_contents(self, arr_name, dest_name, arr_len, ty_info, copy):
570 if ty_info.c_ty == "int8_tArray":
572 return "(*env)->GetByteArrayRegion(env, " + arr_name + ", 0, " + arr_len + ", " + dest_name + ")"
574 return "(*env)->GetByteArrayElements (env, " + arr_name + ", NULL)"
575 elif not ty_info.java_ty[:len(ty_info.java_ty) - 2].endswith("[]"):
576 return "(*env)->Get" + ty_info.subty.java_ty.title() + "ArrayElements (env, " + arr_name + ", NULL)"
579 def get_native_arr_elem(self, arr_name, idxc, ty_info):
580 if self.get_native_arr_contents(arr_name, "", "", ty_info, False) is None:
581 return "(*env)->GetObjectArrayElement(env, " + arr_name + ", " + idxc + ")"
583 assert False # Only called if above is None
584 def get_native_arr_ptr_call(self, ty_info):
585 if ty_info.subty is not None and ty_info.subty.c_ty.endswith("Array"):
587 return ("(*env)->GetPrimitiveArrayCritical(env, ", ", NULL)")
588 def get_native_arr_entry_call(self, ty_info, arr_name, idxc, entry_access):
589 if ty_info.subty is None or not ty_info.subty.c_ty.endswith("Array"):
591 return "(*env)->SetObjectArrayElement(env, " + arr_name + ", " + idxc + ", " + entry_access + ")"
592 def cleanup_native_arr_ref_contents(self, arr_name, dest_name, arr_len, ty_info):
593 if ty_info.c_ty == "int8_tArray":
594 return "(*env)->ReleaseByteArrayElements(env, " + arr_name + ", (int8_t*)" + dest_name + ", 0);"
596 return "(*env)->Release" + ty_info.java_ty.strip("[]").title() + "ArrayElements(env, " + arr_name + ", " + dest_name + ", 0)"
598 def str_ref_to_native_call(self, var_name, str_len):
599 return "str_ref_to_java(env, " + var_name + ", " + str_len + ")"
600 def str_ref_to_c_call(self, var_name):
601 return "java_to_owned_str(env, " + var_name + ")"
603 def c_fn_name_define_pfx(self, fn_name, has_args):
605 return "JNICALL Java_org_ldk_impl_bindings_" + fn_name.replace("_", "_1") + "(JNIEnv *env, jclass clz, "
606 return "JNICALL Java_org_ldk_impl_bindings_" + fn_name.replace("_", "_1") + "(JNIEnv *env, jclass clz"
610 for ty in sorted(self.c_array_class_caches):
611 res = res + "static jclass " + ty + "_clz = NULL;\n"
612 res = res + "JNIEXPORT void Java_org_ldk_impl_bindings_init_1class_1cache(JNIEnv * env, jclass clz) {\n"
613 for ty in sorted(self.c_array_class_caches):
614 res = res + "\t" + ty + "_clz = (*env)->FindClass(env, \"" + ty.replace("arr_of_", "[") + "\");\n"
615 res = res + "\tCHECK(" + ty + "_clz != NULL);\n"
616 res = res + "\t" + ty + "_clz = (*env)->NewGlobalRef(env, " + ty + "_clz);\n"
620 def native_c_unitary_enum_map(self, struct_name, variants, enum_doc_comment):
621 out_java_enum = "package org.ldk.enums;\n\n"
624 out_c += "static inline LDK" + struct_name + " LDK" + struct_name + "_from_java(" + self.c_fn_args_pfx + ") {\n"
625 out_c += "\tjint ord = (*env)->CallIntMethod(env, clz, ordinal_meth);\n"
626 out_c += "\tif (UNLIKELY((*env)->ExceptionCheck(env))) {\n"
627 out_c += "\t\t(*env)->ExceptionDescribe(env);\n"
628 out_c += "\t\t(*env)->FatalError(env, \"A call to " + struct_name + ".ordinal() from rust threw an exception.\");\n"
630 out_c += "\tswitch (ord) {\n"
632 if enum_doc_comment is not None:
633 out_java_enum += "/**\n * " + enum_doc_comment.replace("\n", "\n * ") + "\n */\n"
634 out_java_enum += "public enum " + struct_name + " {\n"
636 for var, var_docs in variants:
637 if var_docs is not None:
638 out_java_enum += "\t/**\n\t * " + var_docs.replace("\n", "\n\t * ") + "\n\t */\n"
639 out_java_enum += "\t" + var + ",\n"
640 out_c = out_c + "\t\tcase %d: return %s;\n" % (ord_v, var)
642 out_java_enum = out_java_enum + "\t; static native void init();\n"
643 out_java_enum = out_java_enum + "\tstatic { init(); }\n"
644 out_java_enum = out_java_enum + "}"
645 out_java = out_java + "\tstatic { " + struct_name + ".values(); /* Force enum statics to run */ }\n"
647 out_c += "\t(*env)->FatalError(env, \"A call to " + struct_name + ".ordinal() from rust returned an invalid value.\");\n"
648 out_c += "\tabort(); // Unreachable, but will let the compiler know we don't return here\n"
651 out_c = out_c + "static jclass " + struct_name + "_class = NULL;\n"
652 for var, _ in variants:
653 out_c = out_c + "static jfieldID " + struct_name + "_" + var + " = NULL;\n"
654 out_c = out_c + self.c_fn_ty_pfx + "void JNICALL Java_org_ldk_enums_" + struct_name.replace("_", "_1") + "_init (" + self.c_fn_args_pfx + ") {\n"
655 out_c = out_c + "\t" + struct_name + "_class = (*env)->NewGlobalRef(env, clz);\n"
656 out_c = out_c + "\tCHECK(" + struct_name + "_class != NULL);\n"
657 for var, _ in variants:
658 out_c = out_c + "\t" + struct_name + "_" + var + " = (*env)->GetStaticFieldID(env, " + struct_name + "_class, \"" + var + "\", \"Lorg/ldk/enums/" + struct_name + ";\");\n"
659 out_c = out_c + "\tCHECK(" + struct_name + "_" + var + " != NULL);\n"
660 out_c = out_c + "}\n"
661 out_c = out_c + "static inline jclass LDK" + struct_name + "_to_java(JNIEnv *env, LDK" + struct_name + " val) {\n"
662 out_c = out_c + "\tswitch (val) {\n"
664 for var, _ in variants:
665 out_c = out_c + "\t\tcase " + var + ":\n"
666 out_c = out_c + "\t\t\treturn (*env)->GetStaticObjectField(env, " + struct_name + "_class, " + struct_name + "_" + var + ");\n"
668 out_c = out_c + "\t\tdefault: abort();\n"
669 out_c = out_c + "\t}\n"
670 out_c = out_c + "}\n\n"
672 return (out_c, out_java_enum, out_java)
674 def c_unitary_enum_to_native_call(self, ty_info):
675 return (ty_info.rust_obj + "_to_java(env, ", ")")
676 def native_unitary_enum_to_c_call(self, ty_info):
677 return (ty_info.rust_obj + "_from_java(env, ", ")")
679 def c_complex_enum_pfx(self, struct_name, variants, init_meth_jty_strs):
682 out_c = out_c + "static jclass " + struct_name + "_" + var + "_class = NULL;\n"
683 out_c = out_c + "static jmethodID " + struct_name + "_" + var + "_meth = NULL;\n"
684 out_c = out_c + self.c_fn_ty_pfx + "void JNICALL Java_org_ldk_impl_bindings_00024" + struct_name.replace("_", "_1") + "_init (" + self.c_fn_args_pfx + ") {\n"
685 for var_name in variants:
686 out_c += "\t" + struct_name + "_" + var_name + "_class =\n"
687 out_c += "\t\t(*env)->NewGlobalRef(env, (*env)->FindClass(env, \"org/ldk/impl/bindings$" + struct_name + "$" + var_name + "\"));\n"
688 out_c += "\tCHECK(" + struct_name + "_" + var_name + "_class != NULL);\n"
689 out_c += "\t" + struct_name + "_" + var_name + "_meth = (*env)->GetMethodID(env, " + struct_name + "_" + var_name + "_class, \"<init>\", \"(" + init_meth_jty_strs[var_name] + ")V\");\n"
690 out_c += "\tCHECK(" + struct_name + "_" + var_name + "_meth != NULL);\n"
691 out_c = out_c + "}\n"
694 def c_complex_enum_pass_ty(self, struct_name):
697 def c_constr_native_complex_enum(self, struct_name, variant, c_params):
698 ret = "(*env)->NewObject(env, " + struct_name + "_" + variant + "_class, " + struct_name + "_" + variant + "_meth"
699 for param in c_params:
700 ret = ret + ", " + param
703 def native_c_map_trait(self, struct_name, field_vars, flattened_field_vars, field_fns, trait_doc_comment):
707 # First generate most of the Java code, note that we need information about java method argument strings for C
708 out_java_trait = out_java_trait + self.hu_struct_file_prefix
709 if trait_doc_comment is not None:
710 out_java_trait += "/**\n * " + trait_doc_comment.replace("\n", "\n * ") + "\n */\n"
711 out_java_trait += "@SuppressWarnings(\"unchecked\") // We correctly assign various generic arrays\n"
712 out_java_trait = out_java_trait + "public class " + struct_name.replace("LDK","") + " extends CommonBase {\n"
713 out_java_trait = out_java_trait + "\tfinal bindings." + struct_name + " bindings_instance;\n"
714 out_java_trait = out_java_trait + "\t" + struct_name.replace("LDK", "") + "(Object _dummy, long ptr) { super(ptr); bindings_instance = null; }\n"
715 out_java_trait = out_java_trait + "\tprivate " + struct_name.replace("LDK", "") + "(bindings." + struct_name + " arg"
716 for var in flattened_field_vars:
717 if isinstance(var, ConvInfo):
718 out_java_trait = out_java_trait + ", " + var.java_hu_ty + " " + var.arg_name
720 out_java_trait = out_java_trait + ", bindings." + var[0] + " " + var[1]
721 out_java_trait = out_java_trait + ") {\n"
722 out_java_trait = out_java_trait + "\t\tsuper(bindings." + struct_name + "_new(arg"
723 for var in flattened_field_vars:
724 if isinstance(var, ConvInfo):
725 if var.from_hu_conv is not None:
726 out_java_trait = out_java_trait + ", " + var.from_hu_conv[0]
728 out_java_trait = out_java_trait + ", " + var.arg_name
730 out_java_trait = out_java_trait + ", " + var[1]
731 out_java_trait = out_java_trait + "));\n"
732 out_java_trait = out_java_trait + "\t\tthis.ptrs_to.add(arg);\n"
733 for var in flattened_field_vars:
734 if isinstance(var, ConvInfo):
735 if var.from_hu_conv is not None and var.from_hu_conv[1] != "":
736 out_java_trait = out_java_trait + "\t\t" + var.from_hu_conv[1].replace("\n", "\n\t\t") + ";\n"
738 out_java_trait = out_java_trait + "\t\tthis.ptrs_to.add(" + var[1] + ");\n"
739 out_java_trait = out_java_trait + "\t\tthis.bindings_instance = arg;\n"
740 out_java_trait = out_java_trait + "\t}\n"
741 out_java_trait = out_java_trait + "\t@Override @SuppressWarnings(\"deprecation\")\n"
742 out_java_trait = out_java_trait + "\tprotected void finalize() throws Throwable {\n"
743 out_java_trait = out_java_trait + "\t\tif (ptr != 0) { bindings." + struct_name.replace("LDK","") + "_free(ptr); } super.finalize();\n"
744 out_java_trait = out_java_trait + "\t}\n\n"
746 java_trait_constr = "\tprivate static class " + struct_name + "Holder { " + struct_name.replace("LDK", "") + " held; }\n"
747 java_trait_constr = java_trait_constr + "\tpublic static " + struct_name.replace("LDK", "") + " new_impl(" + struct_name.replace("LDK", "") + "Interface arg"
748 for var in flattened_field_vars:
749 if isinstance(var, ConvInfo):
750 java_trait_constr = java_trait_constr + ", " + var.java_hu_ty + " " + var.arg_name
752 # Ideally we'd be able to take any instance of the interface, but our C code can only represent
753 # Java-implemented version, so we require users pass a Java implementation here :/
754 java_trait_constr = java_trait_constr + ", " + var[0].replace("LDK", "") + "." + var[0].replace("LDK", "") + "Interface " + var[1] + "_impl"
755 java_trait_constr = java_trait_constr + ") {\n\t\tfinal " + struct_name + "Holder impl_holder = new " + struct_name + "Holder();\n"
756 java_trait_constr = java_trait_constr + "\t\timpl_holder.held = new " + struct_name.replace("LDK", "") + "(new bindings." + struct_name + "() {\n"
757 out_java_trait = out_java_trait + "\tpublic static interface " + struct_name.replace("LDK", "") + "Interface {\n"
758 out_java = out_java + "\tpublic interface " + struct_name + " {\n"
760 for fn_line in field_fns:
761 java_meth_descr = "("
762 if fn_line.fn_name != "free" and fn_line.fn_name != "cloned":
763 out_java = out_java + "\t\t " + fn_line.ret_ty_info.java_ty + " " + fn_line.fn_name + "("
764 java_trait_constr = java_trait_constr + "\t\t\t@Override public " + fn_line.ret_ty_info.java_ty + " " + fn_line.fn_name + "("
765 out_java_trait += "\t\t/**\n\t\t * " + fn_line.docs.replace("\n", "\n\t\t * ") + "\n\t\t */\n"
766 out_java_trait = out_java_trait + "\t\t" + fn_line.ret_ty_info.java_hu_ty + " " + fn_line.fn_name + "("
768 for idx, arg_conv_info in enumerate(fn_line.args_ty):
770 out_java = out_java + ", "
771 java_trait_constr = java_trait_constr + ", "
772 out_java_trait = out_java_trait + ", "
773 out_java = out_java + arg_conv_info.java_ty + " " + arg_conv_info.arg_name
774 out_java_trait = out_java_trait + arg_conv_info.java_hu_ty + " " + arg_conv_info.arg_name
775 java_trait_constr = java_trait_constr + arg_conv_info.java_ty + " " + arg_conv_info.arg_name
776 java_meth_descr = java_meth_descr + arg_conv_info.java_fn_ty_arg
777 java_meth_descr = java_meth_descr + ")" + fn_line.ret_ty_info.java_fn_ty_arg
778 java_meths.append((fn_line.fn_name, java_meth_descr))
780 out_java = out_java + ");\n"
781 out_java_trait = out_java_trait + ");\n"
782 java_trait_constr = java_trait_constr + ") {\n"
784 for arg_info in fn_line.args_ty:
785 if arg_info.to_hu_conv is not None:
786 java_trait_constr = java_trait_constr + "\t\t\t\t" + arg_info.to_hu_conv.replace("\n", "\n\t\t\t\t") + "\n"
788 if fn_line.ret_ty_info.java_ty != "void":
789 java_trait_constr = java_trait_constr + "\t\t\t\t" + fn_line.ret_ty_info.java_hu_ty + " ret = arg." + fn_line.fn_name + "("
791 java_trait_constr = java_trait_constr + "\t\t\t\targ." + fn_line.fn_name + "("
793 for idx, arg_info in enumerate(fn_line.args_ty):
795 java_trait_constr = java_trait_constr + ", "
796 if arg_info.to_hu_conv_name is not None:
797 java_trait_constr = java_trait_constr + arg_info.to_hu_conv_name
799 java_trait_constr = java_trait_constr + arg_info.arg_name
801 java_trait_constr = java_trait_constr + ");\n"
802 if fn_line.ret_ty_info.java_ty != "void":
803 if fn_line.ret_ty_info.from_hu_conv is not None:
804 java_trait_constr = java_trait_constr + "\t\t\t\t" + fn_line.ret_ty_info.java_ty + " result = " + fn_line.ret_ty_info.from_hu_conv[0] + ";\n"
805 if fn_line.ret_ty_info.from_hu_conv[1] != "":
806 java_trait_constr = java_trait_constr + "\t\t\t\t" + fn_line.ret_ty_info.from_hu_conv[1].replace("this", "impl_holder.held") + ";\n"
807 #if fn_line.ret_ty_info.rust_obj in result_types:
808 java_trait_constr = java_trait_constr + "\t\t\t\treturn result;\n"
810 java_trait_constr = java_trait_constr + "\t\t\t\treturn ret;\n"
811 java_trait_constr = java_trait_constr + "\t\t\t}\n"
812 java_trait_constr = java_trait_constr + "\t\t}"
813 for var in field_vars:
814 if isinstance(var, ConvInfo):
815 java_trait_constr = java_trait_constr + ", " + var.arg_name
817 java_trait_constr += ", " + var[1] + ".new_impl(" + var[1] + "_impl"
818 for suparg in var[2]:
819 if isinstance(suparg, ConvInfo):
820 java_trait_constr += ", " + suparg.arg_name
822 java_trait_constr += ", " + suparg[1]
823 java_trait_constr += ").bindings_instance"
824 for suparg in var[2]:
825 if isinstance(suparg, ConvInfo):
826 java_trait_constr += ", " + suparg.arg_name
828 java_trait_constr += ", " + suparg[1]
829 out_java_trait = out_java_trait + "\t}\n"
830 out_java_trait = out_java_trait + java_trait_constr + ");\n\t\treturn impl_holder.held;\n\t}\n"
832 out_java = out_java + "\t}\n"
834 out_java = out_java + "\tpublic static native long " + struct_name + "_new(" + struct_name + " impl"
835 for var in flattened_field_vars:
836 if isinstance(var, ConvInfo):
837 out_java = out_java + ", " + var.java_ty + " " + var.arg_name
839 out_java = out_java + ", " + var[0] + " " + var[1]
840 out_java = out_java + ");\n"
842 # Now that we've written out our java code (and created java_meths), generate C
843 out_c = "typedef struct " + struct_name + "_JCalls {\n"
844 out_c = out_c + "\tatomic_size_t refcnt;\n"
845 out_c = out_c + "\tJavaVM *vm;\n"
846 out_c = out_c + "\tjweak o;\n"
847 for var in flattened_field_vars:
848 if isinstance(var, ConvInfo):
849 # We're a regular ol' field
853 out_c = out_c + "\t" + var[0] + "_JCalls* " + var[1] + ";\n"
855 if fn.fn_name != "free" and fn.fn_name != "cloned":
856 out_c = out_c + "\tjmethodID " + fn.fn_name + "_meth;\n"
857 out_c = out_c + "} " + struct_name + "_JCalls;\n"
859 for fn_line in field_fns:
860 if fn_line.fn_name == "free":
861 out_c = out_c + "static void " + struct_name + "_JCalls_free(void* this_arg) {\n"
862 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
863 out_c = out_c + "\tif (atomic_fetch_sub_explicit(&j_calls->refcnt, 1, memory_order_acquire) == 1) {\n"
864 out_c += "\t\t" + self.construct_jenv().replace("\n", "\n\t\t").strip() + "\n"
865 out_c = out_c + "\t\t(*env)->DeleteWeakGlobalRef(env, j_calls->o);\n"
866 out_c += "\t\t" + self.deconstruct_jenv().replace("\n", "\n\t\t").strip() + "\n"
867 out_c = out_c + "\t\tFREE(j_calls);\n"
868 out_c = out_c + "\t}\n}\n"
870 for idx, fn_line in enumerate(field_fns):
871 if fn_line.fn_name != "free" and fn_line.fn_name != "cloned":
872 assert fn_line.ret_ty_info.ty_info.get_full_rust_ty()[1] == ""
873 out_c = out_c + fn_line.ret_ty_info.ty_info.get_full_rust_ty()[0] + " " + fn_line.fn_name + "_" + struct_name + "_jcall("
874 if fn_line.self_is_const:
875 out_c = out_c + "const void* this_arg"
877 out_c = out_c + "void* this_arg"
879 for idx, arg in enumerate(fn_line.args_ty):
880 out_c = out_c + ", " + arg.ty_info.get_full_rust_ty()[0] + " " + arg.arg_name + arg.ty_info.get_full_rust_ty()[1]
882 out_c = out_c + ") {\n"
883 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
884 out_c += "\t" + self.construct_jenv().replace("\n", "\n\t").strip() + "\n"
886 for arg_info in fn_line.args_ty:
887 if arg_info.ret_conv is not None:
888 out_c = out_c + "\t" + arg_info.ret_conv[0].replace('\n', '\n\t')
889 out_c = out_c + arg_info.arg_name
890 out_c = out_c + arg_info.ret_conv[1].replace('\n', '\n\t') + "\n"
892 out_c = out_c + "\tjobject obj = (*env)->NewLocalRef(env, j_calls->o);\n\tCHECK(obj != NULL);\n"
893 if fn_line.ret_ty_info.c_ty.endswith("Array"):
894 out_c = out_c + "\t" + fn_line.ret_ty_info.c_ty + " ret = (*env)->CallObjectMethod(env, obj, j_calls->" + fn_line.fn_name + "_meth"
895 elif fn_line.ret_ty_info.c_ty == "void":
896 out_c += "\t(*env)->Call" + fn_line.ret_ty_info.java_ty.title() + "Method(env, obj, j_calls->" + fn_line.fn_name + "_meth"
897 elif fn_line.ret_ty_info.java_ty == "String":
898 # Manually write out String methods as they're just an Object
899 out_c += "\t" + fn_line.ret_ty_info.c_ty + " ret = (*env)->CallObjectMethod(env, obj, j_calls->" + fn_line.fn_name + "_meth"
900 elif not fn_line.ret_ty_info.passed_as_ptr:
901 out_c += "\t" + fn_line.ret_ty_info.c_ty + " ret = (*env)->Call" + fn_line.ret_ty_info.java_ty.title() + "Method(env, obj, j_calls->" + fn_line.fn_name + "_meth"
903 out_c = out_c + "\tuint64_t ret = (*env)->CallLongMethod(env, obj, j_calls->" + fn_line.fn_name + "_meth"
905 for idx, arg_info in enumerate(fn_line.args_ty):
906 if arg_info.ret_conv is not None:
907 out_c = out_c + ", " + arg_info.ret_conv_name
909 out_c = out_c + ", " + arg_info.arg_name
910 out_c = out_c + ");\n"
912 out_c += "\tif (UNLIKELY((*env)->ExceptionCheck(env))) {\n"
913 out_c += "\t\t(*env)->ExceptionDescribe(env);\n"
914 out_c += "\t\t(*env)->FatalError(env, \"A call to " + fn_line.fn_name + " in " + struct_name + " from rust threw an exception.\");\n"
917 if fn_line.ret_ty_info.arg_conv is not None:
918 out_c += "\t" + fn_line.ret_ty_info.arg_conv.replace("\n", "\n\t") + "\n"
919 out_c += "\t" + self.deconstruct_jenv().replace("\n", "\n\t").strip() + "\n"
920 out_c += "\treturn " + fn_line.ret_ty_info.arg_conv_name + ";\n"
922 out_c += "\t" + self.deconstruct_jenv().replace("\n", "\n\t").strip() + "\n"
923 if not fn_line.ret_ty_info.passed_as_ptr and fn_line.ret_ty_info.c_ty != "void":
924 out_c += "\treturn ret;\n"
926 out_c = out_c + "}\n"
928 # If we can, write out a clone function whether we need one or not, as we use them in moving to rust
929 can_clone_with_ptr = True
930 for var in field_vars:
931 if isinstance(var, ConvInfo):
932 can_clone_with_ptr = False
933 if can_clone_with_ptr:
934 out_c = out_c + "static void " + struct_name + "_JCalls_cloned(" + struct_name + "* new_obj) {\n"
935 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) new_obj->this_arg;\n"
936 out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->refcnt, 1, memory_order_release);\n"
937 for var in field_vars:
938 if not isinstance(var, ConvInfo):
939 out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->" + var[1] + "->refcnt, 1, memory_order_release);\n"
940 out_c = out_c + "}\n"
942 out_c = out_c + "static inline " + struct_name + " " + struct_name + "_init (" + self.c_fn_args_pfx + ", jobject o"
943 for var in flattened_field_vars:
944 if isinstance(var, ConvInfo):
945 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
947 out_c = out_c + ", jobject " + var[1]
948 out_c = out_c + ") {\n"
950 out_c = out_c + "\tjclass c = (*env)->GetObjectClass(env, o);\n"
951 out_c = out_c + "\tCHECK(c != NULL);\n"
952 out_c = out_c + "\t" + struct_name + "_JCalls *calls = MALLOC(sizeof(" + struct_name + "_JCalls), \"" + struct_name + "_JCalls\");\n"
953 out_c = out_c + "\tatomic_init(&calls->refcnt, 1);\n"
954 out_c = out_c + "\tDO_ASSERT((*env)->GetJavaVM(env, &calls->vm) == 0);\n"
955 out_c = out_c + "\tcalls->o = (*env)->NewWeakGlobalRef(env, o);\n"
957 for (fn_name, java_meth_descr) in java_meths:
958 if fn_name != "free" and fn_name != "cloned":
959 out_c = out_c + "\tcalls->" + fn_name + "_meth = (*env)->GetMethodID(env, c, \"" + fn_name + "\", \"" + java_meth_descr + "\");\n"
960 out_c = out_c + "\tCHECK(calls->" + fn_name + "_meth != NULL);\n"
962 for var in flattened_field_vars:
963 if isinstance(var, ConvInfo) and var.arg_conv is not None:
964 out_c = out_c + "\n\t" + var.arg_conv.replace("\n", "\n\t") +"\n"
965 out_c = out_c + "\n\t" + struct_name + " ret = {\n"
966 out_c = out_c + "\t\t.this_arg = (void*) calls,\n"
967 for fn_line in field_fns:
968 if fn_line.fn_name != "free" and fn_line.fn_name != "cloned":
969 out_c = out_c + "\t\t." + fn_line.fn_name + " = " + fn_line.fn_name + "_" + struct_name + "_jcall,\n"
970 elif fn_line.fn_name == "free":
971 out_c = out_c + "\t\t.free = " + struct_name + "_JCalls_free,\n"
973 out_c = out_c + "\t\t.cloned = " + struct_name + "_JCalls_cloned,\n"
974 for var in field_vars:
975 if isinstance(var, ConvInfo):
976 if var.arg_conv_name is not None:
977 out_c = out_c + "\t\t." + var.arg_name + " = " + var.arg_conv_name + ",\n"
978 out_c = out_c + "\t\t.set_" + var.arg_name + " = NULL,\n"
980 out_c = out_c + "\t\t." + var.var_name + " = " + var.var_name + ",\n"
981 out_c = out_c + "\t\t.set_" + var.var_name + " = NULL,\n"
983 out_c += "\t\t." + var[1] + " = " + var[0] + "_init(env, clz, " + var[1]
984 for suparg in var[2]:
985 if isinstance(suparg, ConvInfo):
986 out_c = out_c + ", " + suparg.arg_name
988 out_c = out_c + ", " + suparg[1]
990 out_c = out_c + "\t};\n"
991 for var in flattened_field_vars:
992 if not isinstance(var, ConvInfo):
993 out_c = out_c + "\tcalls->" + var[1] + " = ret." + var[1] + ".this_arg;\n"
994 out_c = out_c + "\treturn ret;\n"
995 out_c = out_c + "}\n"
997 out_c = out_c + self.c_fn_ty_pfx + "int64_t " + self.c_fn_name_define_pfx(struct_name + "_new", True) + "jobject o"
998 for var in flattened_field_vars:
999 if isinstance(var, ConvInfo):
1000 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
1002 out_c = out_c + ", jobject " + var[1]
1003 out_c = out_c + ") {\n"
1004 out_c = out_c + "\t" + struct_name + " *res_ptr = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n"
1005 out_c = out_c + "\t*res_ptr = " + struct_name + "_init(env, clz, o"
1006 for var in flattened_field_vars:
1007 if isinstance(var, ConvInfo):
1008 out_c = out_c + ", " + var.arg_name
1010 out_c = out_c + ", " + var[1]
1011 out_c = out_c + ");\n"
1012 out_c = out_c + "\treturn (uint64_t)res_ptr;\n"
1013 out_c = out_c + "}\n"
1015 for var in flattened_field_vars:
1016 if not isinstance(var, ConvInfo):
1017 out_java_trait += "\n\t/**\n"
1018 out_java_trait += "\t * Gets the underlying " + var[1] + ".\n"
1019 out_java_trait += "\t */\n"
1020 underscore_name = ''.join('_' + c.lower() if c.isupper() else c for c in var[1]).strip('_')
1021 out_java_trait += "\tpublic " + var[1] + " get_" + underscore_name + "() {\n"
1022 out_java_trait += "\t\t" + var[1] + " res = new " + var[1] + "(null, bindings." + struct_name + "_get_" + var[1] + "(this.ptr));\n"
1023 out_java_trait += "\t\tthis.ptrs_to.add(res);\n"
1024 out_java_trait += "\t\treturn res;\n"
1025 out_java_trait += "\t}\n"
1026 out_java_trait += "\n"
1028 out_java += "\tpublic static native long " + struct_name + "_get_" + var[1] + "(long arg);\n"
1030 out_c += "JNIEXPORT int64_t JNICALL Java_org_ldk_impl_bindings_" + struct_name + "_1get_1" + var[1] + "(JNIEnv *env, jclass clz, int64_t arg) {\n"
1031 out_c += "\t" + struct_name + " *inp = (" + struct_name + " *)(arg & ~1);\n"
1032 out_c += "\tuint64_t res_ptr = (uint64_t)&inp->" + var[1] + ";\n"
1033 out_c += "\tDO_ASSERT((res_ptr & 1) == 0);\n"
1034 out_c += "\treturn (int64_t)(res_ptr | 1);\n"
1037 return (out_java, out_java_trait, out_c)
1039 def trait_struct_inc_refcnt(self, ty_info):
1040 base_conv = "\nif (" + ty_info.var_name + "_conv.free == " + ty_info.rust_obj + "_JCalls_free) {\n"
1041 base_conv = base_conv + "\t// If this_arg is a JCalls struct, then we need to increment the refcnt in it.\n"
1042 base_conv = base_conv + "\t" + ty_info.rust_obj + "_JCalls_cloned(&" + ty_info.var_name + "_conv);\n}"
1045 def map_complex_enum(self, struct_name, variant_list, camel_to_snake, enum_doc_comment):
1046 java_hu_type = struct_name.replace("LDK", "").replace("COption", "Option")
1051 out_java_enum += (self.hu_struct_file_prefix)
1052 out_java_enum += "\n/**\n * " + enum_doc_comment.replace("\n", "\n * ") + "\n */\n"
1053 out_java_enum += "@SuppressWarnings(\"unchecked\") // We correctly assign various generic arrays\n"
1054 out_java_enum += ("public class " + java_hu_type + " extends CommonBase {\n")
1055 out_java_enum += ("\tprivate " + java_hu_type + "(Object _dummy, long ptr) { super(ptr); }\n")
1056 out_java_enum += ("\t@Override @SuppressWarnings(\"deprecation\")\n")
1057 out_java_enum += ("\tprotected void finalize() throws Throwable {\n")
1058 out_java_enum += ("\t\tsuper.finalize();\n")
1059 out_java_enum += ("\t\tif (ptr != 0) { bindings." + struct_name.replace("LDK", "") + "_free(ptr); }\n")
1060 out_java_enum += ("\t}\n")
1061 out_java_enum += ("\tstatic " + java_hu_type + " constr_from_ptr(long ptr) {\n")
1062 out_java_enum += ("\t\tbindings." + struct_name + " raw_val = bindings." + struct_name + "_ref_from_ptr(ptr);\n")
1063 java_hu_subclasses = ""
1065 init_meth_jty_strs = {}
1067 out_java += ("\tpublic static class " + struct_name + " {\n")
1068 out_java += ("\t\tprivate " + struct_name + "() {}\n")
1069 for var in variant_list:
1070 out_java += ("\t\tpublic final static class " + var.var_name + " extends " + struct_name + " {\n")
1071 if var.var_docs is not None:
1072 java_hu_subclasses += "\t/**\n\t * " + var.var_docs.replace("\n", "\n\t * ") + "\n\t */\n"
1073 java_hu_subclasses += "\tpublic final static class " + var.var_name + " extends " + java_hu_type + " {\n"
1074 out_java_enum += ("\t\tif (raw_val.getClass() == bindings." + struct_name + "." + var.var_name + ".class) {\n")
1075 out_java_enum += ("\t\t\treturn new " + var.var_name + "(ptr, (bindings." + struct_name + "." + var.var_name + ")raw_val);\n")
1076 init_meth_jty_str = ""
1077 init_meth_params = ""
1080 for idx, (field_ty, field_docs) in enumerate(var.fields):
1082 init_meth_params = init_meth_params + ", "
1084 if field_ty.java_hu_ty == var.var_name:
1085 field_path = field_ty.java_fn_ty_arg.strip("L;").replace("/", ".")
1086 out_java += "\t\t\tpublic " + field_path + " " + field_ty.arg_name + ";\n"
1087 java_hu_subclasses = java_hu_subclasses + "\t\tpublic final " + field_path + " " + field_ty.arg_name + ";\n"
1088 init_meth_params = init_meth_params + field_path + " " + field_ty.arg_name
1090 out_java += "\t\t\tpublic " + field_ty.java_ty + " " + field_ty.arg_name + ";\n"
1091 if field_docs is not None:
1092 java_hu_subclasses += "\t\t/**\n\t\t * " + field_docs.replace("\n", "\n\t\t * ") + "\n\t\t*/\n"
1093 java_hu_subclasses += "\t\t"
1094 if field_ty.nullable:
1095 java_hu_subclasses += "@Nullable "
1096 java_hu_subclasses += "public final " + field_ty.java_hu_ty + " " + field_ty.arg_name + ";\n"
1097 init_meth_params = init_meth_params + field_ty.java_ty + " " + field_ty.arg_name
1098 init_meth_body = init_meth_body + "this." + field_ty.arg_name + " = " + field_ty.arg_name + "; "
1099 if field_ty.to_hu_conv is not None:
1100 hu_conv_body = hu_conv_body + "\t\t\t" + field_ty.java_ty + " " + field_ty.arg_name + " = obj." + field_ty.arg_name + ";\n"
1101 hu_conv_body = hu_conv_body + "\t\t\t" + field_ty.to_hu_conv.replace("\n", "\n\t\t\t") + "\n"
1102 hu_conv_body = hu_conv_body + "\t\t\tthis." + field_ty.arg_name + " = " + field_ty.to_hu_conv_name + ";\n"
1104 hu_conv_body = hu_conv_body + "\t\t\tthis." + field_ty.arg_name + " = obj." + field_ty.arg_name + ";\n"
1105 init_meth_jty_str = init_meth_jty_str + field_ty.java_fn_ty_arg
1106 out_java += ("\t\t\t" + var.var_name + "(" + init_meth_params + ") { ")
1107 out_java += (init_meth_body)
1109 out_java += ("\t\t}\n")
1110 out_java_enum += ("\t\t}\n")
1111 java_hu_subclasses = java_hu_subclasses + "\t\tprivate " + var.var_name + "(long ptr, bindings." + struct_name + "." + var.var_name + " obj) {\n\t\t\tsuper(null, ptr);\n"
1112 java_hu_subclasses = java_hu_subclasses + hu_conv_body
1113 java_hu_subclasses = java_hu_subclasses + "\t\t}\n\t}\n"
1114 init_meth_jty_strs[var.var_name] = init_meth_jty_str
1115 out_java += ("\t\tstatic native void init();\n")
1116 out_java += ("\t}\n")
1117 out_java_enum += ("\t\tassert false; return null; // Unreachable without extending the (internal) bindings interface\n\t}\n\n")
1118 out_java_enum += (java_hu_subclasses)
1119 out_java += ("\tstatic { " + struct_name + ".init(); }\n")
1120 out_java += ("\tpublic static native " + struct_name + " " + struct_name + "_ref_from_ptr(long ptr);\n");
1122 out_c += (self.c_complex_enum_pfx(struct_name, [x.var_name for x in variant_list], init_meth_jty_strs))
1124 out_c += (self.c_fn_ty_pfx + self.c_complex_enum_pass_ty(struct_name) + " " + self.c_fn_name_define_pfx(struct_name + "_ref_from_ptr", True) + self.ptr_c_ty + " ptr) {\n")
1125 out_c += ("\t" + struct_name + " *obj = (" + struct_name + "*)(ptr & ~1);\n")
1126 out_c += ("\tswitch(obj->tag) {\n")
1127 for var in variant_list:
1128 out_c += ("\t\tcase " + struct_name + "_" + var.var_name + ": {\n")
1130 for idx, (field_map, field_docs) in enumerate(var.fields):
1131 if field_map.ret_conv is not None:
1132 out_c += ("\t\t\t" + field_map.ret_conv[0].replace("\n", "\n\t\t\t"))
1133 if var.tuple_variant:
1134 out_c += "obj->" + camel_to_snake(var.var_name)
1136 out_c += "obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name
1137 out_c += (field_map.ret_conv[1].replace("\n", "\n\t\t\t") + "\n")
1138 c_params.append(field_map.ret_conv_name)
1140 if var.tuple_variant:
1141 c_params.append("obj->" + camel_to_snake(var.var_name))
1143 c_params.append("obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name)
1144 out_c += ("\t\t\treturn " + self.c_constr_native_complex_enum(struct_name, var.var_name, c_params) + ";\n")
1145 out_c += ("\t\t}\n")
1146 out_c += ("\t\tdefault: abort();\n")
1147 out_c += ("\t}\n}\n")
1148 return (out_java, out_java_enum, out_c)
1150 def map_opaque_struct(self, struct_name, struct_doc_comment):
1151 out_opaque_struct_human = ""
1152 out_opaque_struct_human += self.hu_struct_file_prefix
1153 out_opaque_struct_human += "\n/**\n * " + struct_doc_comment.replace("\n", "\n * ") + "\n */\n"
1154 out_opaque_struct_human += "@SuppressWarnings(\"unchecked\") // We correctly assign various generic arrays\n"
1155 hu_name = struct_name.replace("LDKC2Tuple", "TwoTuple").replace("LDKC3Tuple", "ThreeTuple").replace("LDK", "")
1156 out_opaque_struct_human += ("public class " + hu_name + " extends CommonBase")
1157 if struct_name.startswith("LDKLocked"):
1158 out_opaque_struct_human += (" implements AutoCloseable")
1159 out_opaque_struct_human += (" {\n")
1160 out_opaque_struct_human += ("\t" + hu_name + "(Object _dummy, long ptr) { super(ptr); }\n")
1161 if struct_name.startswith("LDKLocked"):
1162 out_opaque_struct_human += ("\t@Override public void close() {\n")
1164 out_opaque_struct_human += ("\t@Override @SuppressWarnings(\"deprecation\")\n")
1165 out_opaque_struct_human += ("\tprotected void finalize() throws Throwable {\n")
1166 out_opaque_struct_human += ("\t\tsuper.finalize();\n")
1167 out_opaque_struct_human += ("\t\tif (ptr != 0) { bindings." + struct_name.replace("LDK","") + "_free(ptr); }\n")
1168 out_opaque_struct_human += ("\t}\n\n")
1169 return out_opaque_struct_human
1171 def map_tuple(self, struct_name):
1172 return self.map_opaque_struct(struct_name, "A Tuple")
1174 def map_function(self, argument_types, c_call_string, method_name, meth_n, return_type_info, struct_meth, default_constructor_args, takes_self, takes_self_as_ref, args_known, type_mapping_generator, doc_comment):
1177 out_java_struct = None
1179 out_java += ("\tpublic static native ")
1180 out_c += (self.c_fn_ty_pfx)
1181 out_c += (return_type_info.c_ty)
1182 out_java += (return_type_info.java_ty)
1183 if return_type_info.ret_conv is not None:
1184 ret_conv_pfx, ret_conv_sfx = return_type_info.ret_conv
1185 out_java += (" " + method_name + "(")
1186 have_args = len(argument_types) > 1 or (len(argument_types) > 0 and argument_types[0].c_ty != "void")
1187 out_c += (" " + self.c_fn_name_define_pfx(method_name, have_args))
1189 for idx, arg_conv_info in enumerate(argument_types):
1193 if arg_conv_info.c_ty != "void":
1194 out_c += (arg_conv_info.c_ty + " " + arg_conv_info.arg_name)
1195 out_java += (arg_conv_info.java_ty + " " + arg_conv_info.arg_name)
1197 out_java_struct = ""
1198 extra_java_struct_out = ""
1200 out_java_struct += ("\t// Skipped " + method_name + "\n")
1202 if doc_comment is not None:
1203 out_java_struct += "\t/**\n\t * " + doc_comment.replace("\n", "\n\t * ") + "\n\t */\n"
1204 if return_type_info.nullable:
1205 out_java_struct += "\t@Nullable\n"
1208 out_java_struct += "\tpublic static " + return_type_info.java_hu_ty + " of("
1209 elif meth_n == "default":
1210 out_java_struct += "\tpublic static " + return_type_info.java_hu_ty + " with_default("
1212 out_java_struct += "\tpublic static " + return_type_info.java_hu_ty + " " + meth_n + "("
1213 elif meth_n == "clone_ptr" or (struct_meth.startswith("LDKCResult") and (meth_n == "get_ok" or meth_n == "get_err")):
1214 out_java_struct += ("\t" + return_type_info.java_hu_ty + " " + meth_n + "(")
1216 if meth_n == "hash" and return_type_info.java_hu_ty == "long":
1217 extra_java_struct_out = "\t@Override public int hashCode() {\n"
1218 extra_java_struct_out += "\t\treturn (int)this.hash();\n"
1219 extra_java_struct_out += "\t}\n"
1220 elif meth_n == "eq" and return_type_info.java_hu_ty == "boolean":
1221 extra_java_struct_out = "\t@Override public boolean equals(Object o) {\n"
1222 extra_java_struct_out += "\t\tif (!(o instanceof " + struct_meth + ")) return false;\n"
1223 extra_java_struct_out += "\t\treturn this.eq((" + struct_meth + ")o);\n"
1224 extra_java_struct_out += "\t}\n"
1225 out_java_struct += ("\tpublic " + return_type_info.java_hu_ty + " " + meth_n + "(")
1226 for idx, arg in enumerate(argument_types):
1228 if not takes_self or idx > 1:
1229 out_java_struct += ", "
1232 if arg.java_ty != "void":
1233 if arg.arg_name in default_constructor_args:
1234 assert not arg.nullable
1235 for explode_idx, explode_arg in enumerate(default_constructor_args[arg.arg_name]):
1236 if explode_idx != 0:
1237 out_java_struct += (", ")
1238 out_java_struct += (
1239 explode_arg.java_hu_ty + " " + arg.arg_name + "_" + explode_arg.arg_name)
1242 out_java_struct += "@Nullable "
1243 ty_string = arg.java_hu_ty
1244 if arg.java_fn_ty_arg[0] == "L" and arg.java_fn_ty_arg[len(arg.java_fn_ty_arg) - 1] == ";":
1245 ty_string = arg.java_fn_ty_arg.strip("L;").replace("/", ".")
1246 out_java_struct += ty_string + " " + arg.arg_name
1247 out_java += (");\n")
1249 if out_java_struct is not None:
1250 out_java_struct += (") {\n")
1251 for info in argument_types:
1252 if info.arg_conv is not None:
1253 out_c += ("\t" + info.arg_conv.replace('\n', "\n\t") + "\n")
1254 if return_type_info.ret_conv is not None:
1255 out_c += ("\t" + ret_conv_pfx.replace('\n', '\n\t'))
1256 elif return_type_info.c_ty != "void":
1257 out_c += ("\t" + return_type_info.c_ty + " ret_val = ")
1260 if c_call_string is None:
1261 out_c += (method_name + "(")
1263 out_c += (c_call_string)
1264 for idx, info in enumerate(argument_types):
1265 if info.arg_conv_name is not None:
1268 elif c_call_string is not None:
1270 out_c += (info.arg_conv_name)
1272 if return_type_info.ret_conv is not None:
1273 out_c += (ret_conv_sfx.replace('\n', '\n\t'))
1276 for info in argument_types:
1277 if info.arg_conv_cleanup is not None:
1278 out_c += ("\n\t" + info.arg_conv_cleanup.replace("\n", "\n\t"))
1279 if return_type_info.ret_conv is not None:
1280 out_c += ("\n\treturn " + return_type_info.ret_conv_name + ";")
1281 elif return_type_info.c_ty != "void":
1282 out_c += ("\n\treturn ret_val;")
1283 out_c += ("\n}\n\n")
1286 out_java_struct += ("\t\t")
1287 if return_type_info.java_ty != "void":
1288 out_java_struct += (return_type_info.java_ty + " ret = ")
1289 out_java_struct += ("bindings." + method_name + "(")
1290 for idx, info in enumerate(argument_types):
1292 out_java_struct += (", ")
1293 if idx == 0 and takes_self:
1294 out_java_struct += ("this.ptr")
1295 elif info.arg_name in default_constructor_args:
1296 out_java_struct += ("bindings." + info.java_hu_ty + "_new(")
1297 for explode_idx, explode_arg in enumerate(default_constructor_args[info.arg_name]):
1298 if explode_idx != 0:
1299 out_java_struct += (", ")
1300 expl_arg_name = info.arg_name + "_" + explode_arg.arg_name
1301 if explode_arg.from_hu_conv is not None:
1302 out_java_struct += (
1303 explode_arg.from_hu_conv[0].replace(explode_arg.arg_name, expl_arg_name))
1305 out_java_struct += (expl_arg_name)
1306 out_java_struct += (")")
1307 elif info.from_hu_conv is not None:
1308 out_java_struct += (info.from_hu_conv[0])
1310 out_java_struct += (info.arg_name)
1311 out_java_struct += (");\n")
1313 # This is completely nuts. The OpenJDK JRE JIT will optimize out a object which is on
1314 # the stack, calling its finalizer immediately even if member methods are *actively
1315 # executing* on the same object, as long as said object is on the stack. There is no
1316 # concrete specification for when the optimizer is allowed to do this, and when it is
1317 # not, so there is absolutely no way to be certain that this fix suffices.
1319 # Instead, the "Java Language Specification" says only that an object is reachable
1320 # (i.e. will not yet be finalized) if it "can be accessed in any potential continuing
1321 # computation from any live thread". To any sensible reader this would mean actively
1322 # executing a member function on an object would make it not eligible for finalization.
1323 # But, no, dear reader, this statement does not say that. Well, okay, it says that,
1324 # very explicitly in fact, but those are just, like, words, man.
1326 # In the seemingly non-normative text further down, a few examples of things the
1327 # optimizer can do are given, including "if the values in an object's fields are
1328 # stored in registers[, t]he may then access the registers instead of the object, and
1329 # never access the object again[, implying] that the object is garbage". This appears
1330 # to fully contradict both the above statement, the API documentation in java.lang.ref
1331 # regarding when a reference is "strongly reachable", and basic common sense. There is
1332 # no concrete set of limitations stated, however, seemingly implying the JIT could
1333 # decide your code would run faster by simply garbage collecting everything
1334 # immediately, ensuring your code finishes soon, just by SEGFAULT. Thus, we're really
1335 # entirely flying blind here. We add some fences and hope that its sufficient, but
1336 # with no specification to rely on, we cannot be certain of anything.
1338 # TL;DR: The Java Language "Specification" provides no real guarantees on when an
1339 # object will be considered available for garbage collection once the JIT kicks in, so
1340 # we put in some fences and hope to god the JIT doesn't get smarter/more broken.
1341 for idx, info in enumerate(argument_types):
1342 if idx == 0 and takes_self:
1343 out_java_struct += ("\t\tReference.reachabilityFence(this);\n")
1344 elif info.arg_name in default_constructor_args:
1345 for explode_idx, explode_arg in enumerate(default_constructor_args[info.arg_name]):
1346 expl_arg_name = info.arg_name + "_" + explode_arg.arg_name
1347 out_java_struct += ("\t\tReference.reachabilityFence(" + expl_arg_name + ");\n")
1348 elif info.c_ty != "void":
1349 out_java_struct += ("\t\tReference.reachabilityFence(" + info.arg_name + ");\n")
1351 if return_type_info.java_ty == "long" and return_type_info.java_hu_ty != "long":
1352 out_java_struct += "\t\tif (ret >= 0 && ret <= 4096) { return null; }\n"
1354 if return_type_info.to_hu_conv is not None:
1356 out_java_struct += ("\t\t" + return_type_info.to_hu_conv.replace("\n", "\n\t\t").replace("this",
1357 return_type_info.to_hu_conv_name) + "\n")
1359 out_java_struct += ("\t\t" + return_type_info.to_hu_conv.replace("\n", "\n\t\t") + "\n")
1361 for idx, info in enumerate(argument_types):
1362 if idx == 0 and takes_self:
1364 elif info.arg_name in default_constructor_args:
1365 for explode_arg in default_constructor_args[info.arg_name]:
1366 expl_arg_name = info.arg_name + "_" + explode_arg.arg_name
1367 if explode_arg.from_hu_conv is not None and return_type_info.to_hu_conv_name:
1368 out_java_struct += ("\t\t" + explode_arg.from_hu_conv[1].replace(explode_arg.arg_name,
1369 expl_arg_name).replace(
1370 "this", return_type_info.to_hu_conv_name) + ";\n")
1371 elif info.from_hu_conv is not None and info.from_hu_conv[1] != "":
1372 if not takes_self and return_type_info.to_hu_conv_name is not None:
1373 out_java_struct += (
1374 "\t\t" + info.from_hu_conv[1].replace("this", return_type_info.to_hu_conv_name).replace("\n", "\n\t\t") + ";\n")
1376 out_java_struct += ("\t\t" + info.from_hu_conv[1].replace("\n", "\n\t\t") + ";\n")
1378 if takes_self and not takes_self_as_ref:
1379 out_java_struct += "\t\t" + argument_types[0].from_hu_conv[1].replace("\n", "\n\t\t").replace("this_arg", "this") + ";\n"
1380 if return_type_info.to_hu_conv_name is not None:
1381 out_java_struct += ("\t\treturn " + return_type_info.to_hu_conv_name + ";\n")
1382 elif return_type_info.java_ty != "void" and return_type_info.rust_obj != "LDK" + struct_meth:
1383 out_java_struct += ("\t\treturn ret;\n")
1384 out_java_struct += ("\t}\n\n")
1386 return (out_java, out_c, out_java_struct + extra_java_struct_out)