1 from bindingstypes import *
4 def __init__(self, DEBUG):
6 self.c_type_map = dict(
13 self.common_base = """package org.ldk.structs;
14 import java.util.LinkedList;
17 LinkedList<Object> ptrs_to = new LinkedList();
18 protected CommonBase(long ptr) { this.ptr = ptr; }
19 public long _test_only_get_ptr() { return this.ptr; }
23 self.c_file_pfx = """#include \"org_ldk_impl_bindings.h\"
24 #include <rust_types.h>
25 #include <lightning.h>
27 #include <stdatomic.h>
32 self.c_file_pfx = self.c_file_pfx + """#define MALLOC(a, _) malloc(a)
33 #define FREE(p) if ((long)(p) > 1024) { free(p); }
34 #define DO_ASSERT(a) (void)(a)
38 self.c_file_pfx = self.c_file_pfx + """#include <assert.h>
39 // Always run a, then assert it is true:
40 #define DO_ASSERT(a) do { bool _assert_val = (a); assert(_assert_val); } while(0)
41 // Assert a is true or do nothing
42 #define CHECK(a) DO_ASSERT(a)
44 // Running a leak check across all the allocations and frees of the JDK is a mess,
45 // so instead we implement our own naive leak checker here, relying on the -wrap
46 // linker option to wrap malloc/calloc/realloc/free, tracking everyhing allocated
47 // and free'd in Rust or C across the generated bindings shared library.
51 static mtx_t allocation_mtx;
53 void __attribute__((constructor)) init_mtx() {
54 DO_ASSERT(mtx_init(&allocation_mtx, mtx_plain) == thrd_success);
58 typedef struct allocation {
59 struct allocation* next;
61 const char* struct_name;
65 static allocation* allocation_ll = NULL;
67 void* __real_malloc(size_t len);
68 void* __real_calloc(size_t nmemb, size_t len);
69 static void new_allocation(void* res, const char* struct_name) {
70 allocation* new_alloc = __real_malloc(sizeof(allocation));
72 new_alloc->struct_name = struct_name;
73 new_alloc->bt_len = backtrace(new_alloc->bt, BT_MAX);
74 DO_ASSERT(mtx_lock(&allocation_mtx) == thrd_success);
75 new_alloc->next = allocation_ll;
76 allocation_ll = new_alloc;
77 DO_ASSERT(mtx_unlock(&allocation_mtx) == thrd_success);
79 static void* MALLOC(size_t len, const char* struct_name) {
80 void* res = __real_malloc(len);
81 new_allocation(res, struct_name);
84 void __real_free(void* ptr);
85 static void alloc_freed(void* ptr) {
87 DO_ASSERT(mtx_lock(&allocation_mtx) == thrd_success);
88 allocation* it = allocation_ll;
89 while (it->ptr != ptr) {
90 p = it; it = it->next;
92 fprintf(stderr, "Tried to free unknown pointer %p at:\\n", ptr);
94 int bt_len = backtrace(bt, BT_MAX);
95 backtrace_symbols_fd(bt, bt_len, STDERR_FILENO);
96 fprintf(stderr, "\\n\\n");
97 DO_ASSERT(mtx_unlock(&allocation_mtx) == thrd_success);
98 return; // addrsan should catch malloc-unknown and print more info than we have
101 if (p) { p->next = it->next; } else { allocation_ll = it->next; }
102 DO_ASSERT(mtx_unlock(&allocation_mtx) == thrd_success);
103 DO_ASSERT(it->ptr == ptr);
106 static void FREE(void* ptr) {
107 if ((long)ptr < 1024) return; // Rust loves to create pointers to the NULL page for dummys
112 void* __wrap_malloc(size_t len) {
113 void* res = __real_malloc(len);
114 new_allocation(res, "malloc call");
117 void* __wrap_calloc(size_t nmemb, size_t len) {
118 void* res = __real_calloc(nmemb, len);
119 new_allocation(res, "calloc call");
122 void __wrap_free(void* ptr) {
123 if (ptr == NULL) return;
128 void* __real_realloc(void* ptr, size_t newlen);
129 void* __wrap_realloc(void* ptr, size_t len) {
130 if (ptr != NULL) alloc_freed(ptr);
131 void* res = __real_realloc(ptr, len);
132 new_allocation(res, "realloc call");
135 void __wrap_reallocarray(void* ptr, size_t new_sz) {
136 // Rust doesn't seem to use reallocarray currently
140 void __attribute__((destructor)) check_leaks() {
141 for (allocation* a = allocation_ll; a != NULL; a = a->next) {
142 fprintf(stderr, "%s %p remains:\\n", a->struct_name, a->ptr);
143 backtrace_symbols_fd(a->bt, a->bt_len, STDERR_FILENO);
144 fprintf(stderr, "\\n\\n");
146 DO_ASSERT(allocation_ll == NULL);
149 self.c_file_pfx = self.c_file_pfx + """
150 static jmethodID ordinal_meth = NULL;
151 static jmethodID slicedef_meth = NULL;
152 static jclass slicedef_cls = NULL;
153 JNIEXPORT void Java_org_ldk_impl_bindings_init(JNIEnv * env, jclass _b, jclass enum_class, jclass slicedef_class) {
154 ordinal_meth = (*env)->GetMethodID(env, enum_class, "ordinal", "()I");
155 CHECK(ordinal_meth != NULL);
156 slicedef_meth = (*env)->GetMethodID(env, slicedef_class, "<init>", "(JJJ)V");
157 CHECK(slicedef_meth != NULL);
158 slicedef_cls = (*env)->NewGlobalRef(env, slicedef_class);
159 CHECK(slicedef_cls != NULL);
162 JNIEXPORT jboolean JNICALL Java_org_ldk_impl_bindings_deref_1bool (JNIEnv * env, jclass _a, jlong ptr) {
163 return *((bool*)ptr);
165 JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_deref_1long (JNIEnv * env, jclass _a, jlong ptr) {
166 return *((long*)ptr);
168 JNIEXPORT void JNICALL Java_org_ldk_impl_bindings_free_1heap_1ptr (JNIEnv * env, jclass _a, jlong ptr) {
171 JNIEXPORT jbyteArray JNICALL Java_org_ldk_impl_bindings_read_1bytes (JNIEnv * env, jclass _b, jlong ptr, jlong len) {
172 jbyteArray ret_arr = (*env)->NewByteArray(env, len);
173 (*env)->SetByteArrayRegion(env, ret_arr, 0, len, (unsigned char*)ptr);
176 JNIEXPORT jbyteArray JNICALL Java_org_ldk_impl_bindings_get_1u8_1slice_1bytes (JNIEnv * env, jclass _b, jlong slice_ptr) {
177 LDKu8slice *slice = (LDKu8slice*)slice_ptr;
178 jbyteArray ret_arr = (*env)->NewByteArray(env, slice->datalen);
179 (*env)->SetByteArrayRegion(env, ret_arr, 0, slice->datalen, slice->data);
182 JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_bytes_1to_1u8_1vec (JNIEnv * env, jclass _b, jbyteArray bytes) {
183 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)MALLOC(sizeof(LDKCVec_u8Z), "LDKCVec_u8");
184 vec->datalen = (*env)->GetArrayLength(env, bytes);
185 vec->data = (uint8_t*)MALLOC(vec->datalen, "LDKCVec_u8Z Bytes");
186 (*env)->GetByteArrayRegion (env, bytes, 0, vec->datalen, vec->data);
189 JNIEXPORT jbyteArray JNICALL Java_org_ldk_impl_bindings_txpointer_1get_1buffer (JNIEnv * env, jclass _b, jlong ptr) {
190 LDKTransaction *txdata = (LDKTransaction*)ptr;
192 slice.data = txdata->data;
193 slice.datalen = txdata->datalen;
194 return Java_org_ldk_impl_bindings_get_1u8_1slice_1bytes(env, _b, (long)&slice);
196 JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_new_1txpointer_1copy_1data (JNIEnv * env, jclass _b, jbyteArray bytes) {
197 LDKTransaction *txdata = (LDKTransaction*)MALLOC(sizeof(LDKTransaction), "LDKTransaction");
198 txdata->datalen = (*env)->GetArrayLength(env, bytes);
199 txdata->data = (uint8_t*)MALLOC(txdata->datalen, "Tx Data Bytes");
200 txdata->data_is_owned = false;
201 (*env)->GetByteArrayRegion (env, bytes, 0, txdata->datalen, txdata->data);
204 JNIEXPORT void JNICALL Java_org_ldk_impl_bindings_txpointer_1free (JNIEnv * env, jclass _b, jlong ptr) {
205 LDKTransaction *tx = (LDKTransaction*)ptr;
206 tx->data_is_owned = true;
207 Transaction_free(*tx);
210 JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_vec_1slice_1len (JNIEnv * env, jclass _a, jlong ptr) {
211 // Check offsets of a few Vec types are all consistent as we're meant to be generic across types
212 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_SignatureZ, datalen), "Vec<*> needs to be mapped identically");
213 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_MessageSendEventZ, datalen), "Vec<*> needs to be mapped identically");
214 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_EventZ, datalen), "Vec<*> needs to be mapped identically");
215 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_C2Tuple_usizeTransactionZZ, datalen), "Vec<*> needs to be mapped identically");
216 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)ptr;
217 return (long)vec->datalen;
219 JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_new_1empty_1slice_1vec (JNIEnv * env, jclass _b) {
220 // Check sizes of a few Vec types are all consistent as we're meant to be generic across types
221 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_SignatureZ), "Vec<*> needs to be mapped identically");
222 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_MessageSendEventZ), "Vec<*> needs to be mapped identically");
223 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_EventZ), "Vec<*> needs to be mapped identically");
224 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_C2Tuple_usizeTransactionZZ), "Vec<*> needs to be mapped identically");
225 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)MALLOC(sizeof(LDKCVec_u8Z), "Empty LDKCVec");
231 // We assume that CVec_u8Z and u8slice are the same size and layout (and thus pointers to the two can be mixed)
232 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKu8slice), "Vec<u8> and [u8] need to have been mapped identically");
233 _Static_assert(offsetof(LDKCVec_u8Z, data) == offsetof(LDKu8slice, data), "Vec<u8> and [u8] need to have been mapped identically");
234 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKu8slice, datalen), "Vec<u8> and [u8] need to have been mapped identically");
236 _Static_assert(sizeof(jlong) == sizeof(int64_t), "We assume that j-types are the same as C types");
237 _Static_assert(sizeof(jbyte) == sizeof(char), "We assume that j-types are the same as C types");
238 _Static_assert(sizeof(void*) <= 8, "Pointers must fit into 64 bits");
240 typedef jlongArray int64_tArray;
241 typedef jbyteArray int8_tArray;
245 self.hu_struct_file_prefix = """package org.ldk.structs;
247 import org.ldk.impl.bindings;
248 import org.ldk.enums.*;
249 import org.ldk.util.*;
250 import java.util.Arrays;
252 @SuppressWarnings("unchecked") // We correctly assign various generic arrays
254 self.c_fn_ty_pfx = "JNIEXPORT "
255 self.c_fn_name_pfx = "JNICALL Java_org_ldk_impl_bindings_"
256 self.c_fn_args_pfx = "JNIEnv *env, jclass clz"
257 self.file_ext = ".java"
258 self.ptr_c_ty = "int64_t"
259 self.ptr_native_ty = "long"
260 self.result_c_ty = "jclass"
261 self.ptr_arr = "jobjectArray"
262 self.get_native_arr_len_call = ("(*env)->GetArrayLength(env, ", ")")
263 self.get_native_arr_ptr_call = ("(*env)->GetPrimitiveArrayCritical(env, ", ", NULL)")
265 def release_native_arr_ptr_call(self, arr_var, arr_ptr_var):
266 return "(*env)->ReleasePrimitiveArrayCritical(env, " + arr_var + ", " + arr_ptr_var + ", 0)"
267 def create_native_arr_call(self, arr_len, ty_info):
268 if ty_info.c_ty == "int8_tArray":
269 return "(*env)->NewByteArray(env, " + arr_len + ")"
271 return "(*env)->New" + ty_info.java_ty.strip("[]").title() + "Array(env, " + arr_len + ")"
272 def set_native_arr_contents(self, arr_name, arr_len, ty_info):
273 if ty_info.c_ty == "int8_tArray":
274 return ("(*env)->SetByteArrayRegion(env, " + arr_name + ", 0, " + arr_len + ", ", ")")
277 def get_native_arr_contents(self, arr_name, dest_name, arr_len, ty_info, copy):
278 if ty_info.c_ty == "int8_tArray":
280 return "(*env)->GetByteArrayRegion(env, " + arr_name + ", 0, " + arr_len + ", " + dest_name + ")"
282 return "(*env)->GetByteArrayElements (env, " + arr_name + ", NULL)"
283 elif not ty_info.java_ty[:len(ty_info.java_ty) - 2].endswith("[]"):
284 return "(*env)->Get" + ty_info.subty.java_ty.title() + "ArrayElements (env, " + arr_name + ", NULL)"
287 def get_native_arr_elem(self, arr_name, idxc, ty_info):
288 if self.get_native_arr_contents(arr_name, "", "", ty_info, False) is None:
289 return "(*env)->GetObjectArrayElement(env, " + arr_name + ", " + idxc + ")"
291 assert False # Only called if above is None
292 def cleanup_native_arr_ref_contents(self, arr_name, dest_name, arr_len, ty_info):
293 if ty_info.c_ty == "int8_tArray":
294 return "(*env)->ReleaseByteArrayElements(env, " + arr_name + ", (int8_t*)" + dest_name + ", 0);"
296 return "(*env)->Release" + ty_info.java_ty.strip("[]").title() + "ArrayElements(env, " + arr_name + ", " + dest_name + ", 0)"
298 def init_str(self, c_array_class_caches):
300 for ty in c_array_class_caches:
301 res = res + "static jclass " + ty + "_clz = NULL;\n"
302 res = res + "JNIEXPORT void Java_org_ldk_impl_bindings_init_1class_1cache(JNIEnv * env, jclass clz) {\n"
303 for ty in c_array_class_caches:
304 res = res + "\t" + ty + "_clz = (*env)->FindClass(env, \"" + ty.replace("arr_of_", "[") + "\");\n"
305 res = res + "\tCHECK(" + ty + "_clz != NULL);\n"
306 res = res + "\t" + ty + "_clz = (*env)->NewGlobalRef(env, " + ty + "_clz);\n"
310 def native_c_unitary_enum_map(self, struct_name, variants):
311 out_java_enum = "package org.ldk.enums;\n\n"
314 out_c = out_c + "static inline " + struct_name + " " + struct_name + "_from_java(" + self.c_fn_args_pfx + ") {\n"
315 out_c = out_c + "\tswitch ((*env)->CallIntMethod(env, clz, ordinal_meth)) {\n"
317 out_java_enum = out_java_enum + "public enum " + struct_name + " {\n"
320 out_java_enum = out_java_enum + "\t" + var + ",\n"
321 out_c = out_c + "\t\tcase %d: return %s;\n" % (ord_v, var)
323 out_java_enum = out_java_enum + "\t; static native void init();\n"
324 out_java_enum = out_java_enum + "\tstatic { init(); }\n"
325 out_java_enum = out_java_enum + "}"
326 out_java = out_java + "\tstatic { " + struct_name + ".values(); /* Force enum statics to run */ }\n"
327 out_c = out_c + "\t}\n"
328 out_c = out_c + "\tabort();\n"
329 out_c = out_c + "}\n"
331 out_c = out_c + "static jclass " + struct_name + "_class = NULL;\n"
333 out_c = out_c + "static jfieldID " + struct_name + "_" + var + " = NULL;\n"
334 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"
335 out_c = out_c + "\t" + struct_name + "_class = (*env)->NewGlobalRef(env, clz);\n"
336 out_c = out_c + "\tCHECK(" + struct_name + "_class != NULL);\n"
338 out_c = out_c + "\t" + struct_name + "_" + var + " = (*env)->GetStaticFieldID(env, " + struct_name + "_class, \"" + var + "\", \"Lorg/ldk/enums/" + struct_name + ";\");\n"
339 out_c = out_c + "\tCHECK(" + struct_name + "_" + var + " != NULL);\n"
340 out_c = out_c + "}\n"
341 out_c = out_c + "static inline jclass " + struct_name + "_to_java(JNIEnv *env, " + struct_name + " val) {\n"
342 out_c = out_c + "\tswitch (val) {\n"
345 out_c = out_c + "\t\tcase " + var + ":\n"
346 out_c = out_c + "\t\t\treturn (*env)->GetStaticObjectField(env, " + struct_name + "_class, " + struct_name + "_" + var + ");\n"
348 out_c = out_c + "\t\tdefault: abort();\n"
349 out_c = out_c + "\t}\n"
350 out_c = out_c + "}\n\n"
352 return (out_c, out_java_enum, out_java)
354 def c_unitary_enum_to_native_call(self, ty_info):
355 return (ty_info.rust_obj + "_to_java(env, ", ")")
356 def native_unitary_enum_to_c_call(self, ty_info):
357 return (ty_info.rust_obj + "_from_java(env, ", ")")
359 def c_complex_enum_pfx(self, struct_name, variants, init_meth_jty_strs):
362 out_c = out_c + "static jclass " + struct_name + "_" + var + "_class = NULL;\n"
363 out_c = out_c + "static jmethodID " + struct_name + "_" + var + "_meth = NULL;\n"
364 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"
365 for var_name in variants:
366 out_c = out_c + "\t" + struct_name + "_" + var_name + "_class =\n"
367 out_c = out_c + "\t\t(*env)->NewGlobalRef(env, (*env)->FindClass(env, \"Lorg/ldk/impl/bindings$" + struct_name + "$" + var_name + ";\"));\n"
368 out_c = out_c + "\tCHECK(" + struct_name + "_" + var_name + "_class != NULL);\n"
369 out_c = 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"
370 out_c = out_c + "\tCHECK(" + struct_name + "_" + var_name + "_meth != NULL);\n"
371 out_c = out_c + "}\n"
374 def c_complex_enum_pass_ty(self, struct_name):
377 def c_constr_native_complex_enum(self, struct_name, variant, c_params):
378 ret = "(*env)->NewObject(env, " + struct_name + "_" + variant + "_class, " + struct_name + "_" + variant + "_meth"
379 for param in c_params:
380 ret = ret + ", " + param
383 def native_c_map_trait(self, struct_name, field_vars, field_fns):
387 # First generate most of the Java code, note that we need information about java method argument strings for C
388 out_java_trait = out_java_trait + self.hu_struct_file_prefix
389 out_java_trait = out_java_trait + "public class " + struct_name.replace("LDK","") + " extends CommonBase {\n"
390 out_java_trait = out_java_trait + "\tfinal bindings." + struct_name + " bindings_instance;\n"
391 out_java_trait = out_java_trait + "\t" + struct_name.replace("LDK", "") + "(Object _dummy, long ptr) { super(ptr); bindings_instance = null; }\n"
392 out_java_trait = out_java_trait + "\tprivate " + struct_name.replace("LDK", "") + "(bindings." + struct_name + " arg"
393 for var in field_vars:
394 if isinstance(var, ConvInfo):
395 out_java_trait = out_java_trait + ", " + var.java_hu_ty + " " + var.arg_name
397 out_java_trait = out_java_trait + ", bindings." + var[0] + " " + var[1]
398 out_java_trait = out_java_trait + ") {\n"
399 out_java_trait = out_java_trait + "\t\tsuper(bindings." + struct_name + "_new(arg"
400 for var in field_vars:
401 if isinstance(var, ConvInfo):
402 if var.from_hu_conv is not None:
403 out_java_trait = out_java_trait + ", " + var.from_hu_conv[0]
405 out_java_trait = out_java_trait + ", " + var.arg_name
407 out_java_trait = out_java_trait + ", " + var[1]
408 out_java_trait = out_java_trait + "));\n"
409 out_java_trait = out_java_trait + "\t\tthis.ptrs_to.add(arg);\n"
410 for var in field_vars:
411 if isinstance(var, ConvInfo):
412 if var.from_hu_conv is not None and var.from_hu_conv[1] != "":
413 out_java_trait = out_java_trait + "\t\t" + var.from_hu_conv[1] + ";\n"
415 out_java_trait = out_java_trait + "\t\tthis.ptrs_to.add(" + var[1] + ");\n"
416 out_java_trait = out_java_trait + "\t\tthis.bindings_instance = arg;\n"
417 out_java_trait = out_java_trait + "\t}\n"
418 out_java_trait = out_java_trait + "\t@Override @SuppressWarnings(\"deprecation\")\n"
419 out_java_trait = out_java_trait + "\tprotected void finalize() throws Throwable {\n"
420 out_java_trait = out_java_trait + "\t\tif (ptr != 0) { bindings." + struct_name.replace("LDK","") + "_free(ptr); } super.finalize();\n"
421 out_java_trait = out_java_trait + "\t}\n\n"
423 java_trait_constr = "\tprivate static class " + struct_name + "Holder { " + struct_name.replace("LDK", "") + " held; }\n"
424 java_trait_constr = java_trait_constr + "\tpublic static " + struct_name.replace("LDK", "") + " new_impl(" + struct_name.replace("LDK", "") + "Interface arg"
425 for var in field_vars:
426 if isinstance(var, ConvInfo):
427 java_trait_constr = java_trait_constr + ", " + var.java_hu_ty + " " + var.arg_name
429 # Ideally we'd be able to take any instance of the interface, but our C code can only represent
430 # Java-implemented version, so we require users pass a Java implementation here :/
431 java_trait_constr = java_trait_constr + ", " + var[0].replace("LDK", "") + "." + var[0].replace("LDK", "") + "Interface " + var[1] + "_impl"
432 java_trait_constr = java_trait_constr + ") {\n\t\tfinal " + struct_name + "Holder impl_holder = new " + struct_name + "Holder();\n"
433 java_trait_constr = java_trait_constr + "\t\timpl_holder.held = new " + struct_name.replace("LDK", "") + "(new bindings." + struct_name + "() {\n"
434 out_java_trait = out_java_trait + "\tpublic static interface " + struct_name.replace("LDK", "") + "Interface {\n"
435 out_java = out_java + "\tpublic interface " + struct_name + " {\n"
437 for fn_line in field_fns:
438 java_meth_descr = "("
439 if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
440 out_java = out_java + "\t\t " + fn_line.ret_ty_info.java_ty + " " + fn_line.fn_name + "("
441 java_trait_constr = java_trait_constr + "\t\t\t@Override public " + fn_line.ret_ty_info.java_ty + " " + fn_line.fn_name + "("
442 out_java_trait = out_java_trait + "\t\t" + fn_line.ret_ty_info.java_hu_ty + " " + fn_line.fn_name + "("
444 for idx, arg_conv_info in enumerate(fn_line.args_ty):
446 out_java = out_java + ", "
447 java_trait_constr = java_trait_constr + ", "
448 out_java_trait = out_java_trait + ", "
449 out_java = out_java + arg_conv_info.java_ty + " " + arg_conv_info.arg_name
450 out_java_trait = out_java_trait + arg_conv_info.java_hu_ty + " " + arg_conv_info.arg_name
451 java_trait_constr = java_trait_constr + arg_conv_info.java_ty + " " + arg_conv_info.arg_name
452 java_meth_descr = java_meth_descr + arg_conv_info.java_fn_ty_arg
453 java_meth_descr = java_meth_descr + ")" + fn_line.ret_ty_info.java_fn_ty_arg
454 java_meths.append((fn_line.fn_name, java_meth_descr))
456 out_java = out_java + ");\n"
457 out_java_trait = out_java_trait + ");\n"
458 java_trait_constr = java_trait_constr + ") {\n"
460 for arg_info in fn_line.args_ty:
461 if arg_info.to_hu_conv is not None:
462 java_trait_constr = java_trait_constr + "\t\t\t\t" + arg_info.to_hu_conv.replace("\n", "\n\t\t\t\t") + "\n"
464 if fn_line.ret_ty_info.java_ty != "void":
465 java_trait_constr = java_trait_constr + "\t\t\t\t" + fn_line.ret_ty_info.java_hu_ty + " ret = arg." + fn_line.fn_name + "("
467 java_trait_constr = java_trait_constr + "\t\t\t\targ." + fn_line.fn_name + "("
469 for idx, arg_info in enumerate(fn_line.args_ty):
471 java_trait_constr = java_trait_constr + ", "
472 if arg_info.to_hu_conv_name is not None:
473 java_trait_constr = java_trait_constr + arg_info.to_hu_conv_name
475 java_trait_constr = java_trait_constr + arg_info.arg_name
477 java_trait_constr = java_trait_constr + ");\n"
478 if fn_line.ret_ty_info.java_ty != "void":
479 if fn_line.ret_ty_info.from_hu_conv is not None:
480 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"
481 if fn_line.ret_ty_info.from_hu_conv[1] != "":
482 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"
483 #if fn_line.ret_ty_info.rust_obj in result_types:
484 # XXX: We need to handle this in conversion logic so that its cross-language!
485 # Avoid double-free by breaking the result - we should learn to clone these and then we can be safe instead
486 # java_trait_constr = java_trait_constr + "\t\t\t\tret.ptr = 0;\n"
487 java_trait_constr = java_trait_constr + "\t\t\t\treturn result;\n"
489 java_trait_constr = java_trait_constr + "\t\t\t\treturn ret;\n"
490 java_trait_constr = java_trait_constr + "\t\t\t}\n"
491 java_trait_constr = java_trait_constr + "\t\t}"
492 for var in field_vars:
493 if isinstance(var, ConvInfo):
494 java_trait_constr = java_trait_constr + ", " + var.arg_name
496 java_trait_constr = java_trait_constr + ", " + var[1] + ".new_impl(" + var[1] + "_impl).bindings_instance"
497 out_java_trait = out_java_trait + "\t}\n"
498 out_java_trait = out_java_trait + java_trait_constr + ");\n\t\treturn impl_holder.held;\n\t}\n"
500 out_java = out_java + "\t}\n"
502 out_java = out_java + "\tpublic static native long " + struct_name + "_new(" + struct_name + " impl"
503 for var in field_vars:
504 if isinstance(var, ConvInfo):
505 out_java = out_java + ", " + var.java_ty + " " + var.arg_name
507 out_java = out_java + ", " + var[0] + " " + var[1]
508 out_java = out_java + ");\n"
509 out_java = out_java + "\tpublic static native " + struct_name + " " + struct_name + "_get_obj_from_jcalls(long val);\n"
511 # Now that we've written out our java code (and created java_meths), generate C
512 out_c = "typedef struct " + struct_name + "_JCalls {\n"
513 out_c = out_c + "\tatomic_size_t refcnt;\n"
514 out_c = out_c + "\tJavaVM *vm;\n"
515 out_c = out_c + "\tjweak o;\n"
516 for var in field_vars:
517 if isinstance(var, ConvInfo):
518 # We're a regular ol' field
522 out_c = out_c + "\t" + var[0] + "_JCalls* " + var[1] + ";\n"
524 if fn.fn_name != "free" and fn.fn_name != "clone":
525 out_c = out_c + "\tjmethodID " + fn.fn_name + "_meth;\n"
526 out_c = out_c + "} " + struct_name + "_JCalls;\n"
528 for fn_line in field_fns:
529 if fn_line.fn_name == "free":
530 out_c = out_c + "static void " + struct_name + "_JCalls_free(void* this_arg) {\n"
531 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
532 out_c = out_c + "\tif (atomic_fetch_sub_explicit(&j_calls->refcnt, 1, memory_order_acquire) == 1) {\n"
533 out_c = out_c + "\t\tJNIEnv *env;\n"
534 out_c = out_c + "\t\tDO_ASSERT((*j_calls->vm)->GetEnv(j_calls->vm, (void**)&env, JNI_VERSION_1_8) == JNI_OK);\n"
535 out_c = out_c + "\t\t(*env)->DeleteWeakGlobalRef(env, j_calls->o);\n"
536 out_c = out_c + "\t\tFREE(j_calls);\n"
537 out_c = out_c + "\t}\n}\n"
539 for idx, fn_line in enumerate(field_fns):
540 if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
541 assert fn_line.ret_ty_info.ty_info.get_full_rust_ty()[1] == ""
542 out_c = out_c + fn_line.ret_ty_info.ty_info.get_full_rust_ty()[0] + " " + fn_line.fn_name + "_jcall("
543 if fn_line.self_is_const:
544 out_c = out_c + "const void* this_arg"
546 out_c = out_c + "void* this_arg"
548 for idx, arg in enumerate(fn_line.args_ty):
549 out_c = out_c + ", " + arg.ty_info.get_full_rust_ty()[0] + " " + arg.arg_name + arg.ty_info.get_full_rust_ty()[1]
551 out_c = out_c + ") {\n"
552 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
553 out_c = out_c + "\tJNIEnv *env;\n"
554 out_c = out_c + "\tDO_ASSERT((*j_calls->vm)->GetEnv(j_calls->vm, (void**)&env, JNI_VERSION_1_8) == JNI_OK);\n"
556 for arg_info in fn_line.args_ty:
557 if arg_info.ret_conv is not None:
558 out_c = out_c + "\t" + arg_info.ret_conv[0].replace('\n', '\n\t')
559 out_c = out_c + arg_info.arg_name
560 out_c = out_c + arg_info.ret_conv[1].replace('\n', '\n\t') + "\n"
562 out_c = out_c + "\tjobject obj = (*env)->NewLocalRef(env, j_calls->o);\n\tCHECK(obj != NULL);\n"
563 if fn_line.ret_ty_info.c_ty.endswith("Array"):
564 out_c = out_c + "\t" + fn_line.ret_ty_info.c_ty + " arg = (*env)->CallObjectMethod(env, obj, j_calls->" + fn_line.fn_name + "_meth"
565 elif not fn_line.ret_ty_info.passed_as_ptr:
566 out_c = out_c + "\treturn (*env)->Call" + fn_line.ret_ty_info.java_ty.title() + "Method(env, obj, j_calls->" + fn_line.fn_name + "_meth"
568 out_c = out_c + "\t" + fn_line.ret_ty_info.rust_obj + "* ret = (" + fn_line.ret_ty_info.rust_obj + "*)(*env)->CallLongMethod(env, obj, j_calls->" + fn_line.fn_name + "_meth"
570 for idx, arg_info in enumerate(fn_line.args_ty):
571 if arg_info.ret_conv is not None:
572 out_c = out_c + ", " + arg_info.ret_conv_name
574 out_c = out_c + ", " + arg_info.arg_name
575 out_c = out_c + ");\n"
576 if fn_line.ret_ty_info.arg_conv is not None:
577 out_c = out_c + "\t" + fn_line.ret_ty_info.arg_conv.replace("\n", "\n\t") + "\n\treturn " + fn_line.ret_ty_info.arg_conv_name + ";\n"
579 out_c = out_c + "}\n"
581 # Write out a clone function whether we need one or not, as we use them in moving to rust
582 out_c = out_c + "static void* " + struct_name + "_JCalls_clone(const void* this_arg) {\n"
583 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
584 out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->refcnt, 1, memory_order_release);\n"
585 for var in field_vars:
586 if not isinstance(var, ConvInfo):
587 out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->" + var[1] + "->refcnt, 1, memory_order_release);\n"
588 out_c = out_c + "\treturn (void*) this_arg;\n"
589 out_c = out_c + "}\n"
591 out_c = out_c + "static inline " + struct_name + " " + struct_name + "_init (" + self.c_fn_args_pfx + ", jobject o"
592 for var in field_vars:
593 if isinstance(var, ConvInfo):
594 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
596 out_c = out_c + ", jobject " + var[1]
597 out_c = out_c + ") {\n"
599 out_c = out_c + "\tjclass c = (*env)->GetObjectClass(env, o);\n"
600 out_c = out_c + "\tCHECK(c != NULL);\n"
601 out_c = out_c + "\t" + struct_name + "_JCalls *calls = MALLOC(sizeof(" + struct_name + "_JCalls), \"" + struct_name + "_JCalls\");\n"
602 out_c = out_c + "\tatomic_init(&calls->refcnt, 1);\n"
603 out_c = out_c + "\tDO_ASSERT((*env)->GetJavaVM(env, &calls->vm) == 0);\n"
604 out_c = out_c + "\tcalls->o = (*env)->NewWeakGlobalRef(env, o);\n"
606 for (fn_name, java_meth_descr) in java_meths:
607 if fn_name != "free" and fn_name != "clone":
608 out_c = out_c + "\tcalls->" + fn_name + "_meth = (*env)->GetMethodID(env, c, \"" + fn_name + "\", \"" + java_meth_descr + "\");\n"
609 out_c = out_c + "\tCHECK(calls->" + fn_name + "_meth != NULL);\n"
611 for var in field_vars:
612 if isinstance(var, ConvInfo) and var.arg_conv is not None:
613 out_c = out_c + "\n\t" + var.arg_conv.replace("\n", "\n\t") +"\n"
614 out_c = out_c + "\n\t" + struct_name + " ret = {\n"
615 out_c = out_c + "\t\t.this_arg = (void*) calls,\n"
616 for fn_line in field_fns:
617 if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
618 out_c = out_c + "\t\t." + fn_line.fn_name + " = " + fn_line.fn_name + "_jcall,\n"
619 elif fn_line.fn_name == "free":
620 out_c = out_c + "\t\t.free = " + struct_name + "_JCalls_free,\n"
622 out_c = out_c + "\t\t.clone = " + struct_name + "_JCalls_clone,\n"
623 for var in field_vars:
624 if isinstance(var, ConvInfo):
625 if var.arg_conv_name is not None:
626 out_c = out_c + "\t\t." + var.arg_name + " = " + var.arg_conv_name + ",\n"
627 out_c = out_c + "\t\t.set_" + var.arg_name + " = NULL,\n"
629 out_c = out_c + "\t\t." + var.var_name + " = " + var.var_name + ",\n"
630 out_c = out_c + "\t\t.set_" + var.var_name + " = NULL,\n"
632 out_c = out_c + "\t\t." + var[1] + " = " + var[0] + "_init(env, clz, " + var[1] + "),\n"
633 out_c = out_c + "\t};\n"
634 for var in field_vars:
635 if not isinstance(var, ConvInfo):
636 out_c = out_c + "\tcalls->" + var[1] + " = ret." + var[1] + ".this_arg;\n"
637 out_c = out_c + "\treturn ret;\n"
638 out_c = out_c + "}\n"
640 out_c = out_c + self.c_fn_ty_pfx + "long " + self.c_fn_name_pfx + struct_name.replace("_", "_1") + "_1new (" + self.c_fn_args_pfx + ", jobject o"
641 for var in field_vars:
642 if isinstance(var, ConvInfo):
643 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
645 out_c = out_c + ", jobject " + var[1]
646 out_c = out_c + ") {\n"
647 out_c = out_c + "\t" + struct_name + " *res_ptr = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n"
648 out_c = out_c + "\t*res_ptr = " + struct_name + "_init(env, clz, o"
649 for var in field_vars:
650 if isinstance(var, ConvInfo):
651 out_c = out_c + ", " + var.arg_name
653 out_c = out_c + ", " + var[1]
654 out_c = out_c + ");\n"
655 out_c = out_c + "\treturn (long)res_ptr;\n"
656 out_c = out_c + "}\n"
658 out_c = out_c + self.c_fn_ty_pfx + "jobject " + self.c_fn_name_pfx + struct_name.replace("_", "_1") + "_1get_1obj_1from_1jcalls (" + self.c_fn_args_pfx + ", " + self.ptr_c_ty + " val) {\n"
659 out_c = out_c + "\tjobject ret = (*env)->NewLocalRef(env, ((" + struct_name + "_JCalls*)val)->o);\n"
660 out_c = out_c + "\tCHECK(ret != NULL);\n"
661 out_c = out_c + "\treturn ret;\n"
662 out_c = out_c + "}\n"
664 return (out_java, out_java_trait, out_c)
666 def map_complex_enum(self, struct_name, variant_list, camel_to_snake):
667 java_hu_type = struct_name.replace("LDK", "")
672 out_java_enum += (self.hu_struct_file_prefix)
673 out_java_enum += ("public class " + java_hu_type + " extends CommonBase {\n")
674 out_java_enum += ("\tprivate " + java_hu_type + "(Object _dummy, long ptr) { super(ptr); }\n")
675 out_java_enum += ("\t@Override @SuppressWarnings(\"deprecation\")\n")
676 out_java_enum += ("\tprotected void finalize() throws Throwable {\n")
677 out_java_enum += ("\t\tsuper.finalize();\n")
678 out_java_enum += ("\t\tif (ptr != 0) { bindings." + java_hu_type + "_free(ptr); }\n")
679 out_java_enum += ("\t}\n")
680 out_java_enum += ("\tstatic " + java_hu_type + " constr_from_ptr(long ptr) {\n")
681 out_java_enum += ("\t\tbindings." + struct_name + " raw_val = bindings." + struct_name + "_ref_from_ptr(ptr);\n")
682 java_hu_subclasses = ""
684 init_meth_jty_strs = {}
686 out_java += ("\tpublic static class " + struct_name + " {\n")
687 out_java += ("\t\tprivate " + struct_name + "() {}\n")
688 for var in variant_list:
689 out_java += ("\t\tpublic final static class " + var.var_name + " extends " + struct_name + " {\n")
690 java_hu_subclasses = java_hu_subclasses + "\tpublic final static class " + var.var_name + " extends " + java_hu_type + " {\n"
691 out_java_enum += ("\t\tif (raw_val.getClass() == bindings." + struct_name + "." + var.var_name + ".class) {\n")
692 out_java_enum += ("\t\t\treturn new " + var.var_name + "(ptr, (bindings." + struct_name + "." + var.var_name + ")raw_val);\n")
693 init_meth_jty_str = ""
694 init_meth_params = ""
697 for idx, field_ty in enumerate(var.fields):
698 out_java += ("\t\t\tpublic " + field_ty.java_ty + " " + field_ty.arg_name + ";\n")
699 java_hu_subclasses = java_hu_subclasses + "\t\tpublic final " + field_ty.java_hu_ty + " " + field_ty.arg_name + ";\n"
700 if field_ty.to_hu_conv is not None:
701 hu_conv_body = hu_conv_body + "\t\t\t" + field_ty.java_ty + " " + field_ty.arg_name + " = obj." + field_ty.arg_name + ";\n"
702 hu_conv_body = hu_conv_body + "\t\t\t" + field_ty.to_hu_conv.replace("\n", "\n\t\t\t") + "\n"
703 hu_conv_body = hu_conv_body + "\t\t\tthis." + field_ty.arg_name + " = " + field_ty.to_hu_conv_name + ";\n"
705 hu_conv_body = hu_conv_body + "\t\t\tthis." + field_ty.arg_name + " = obj." + field_ty.arg_name + ";\n"
706 init_meth_jty_str = init_meth_jty_str + field_ty.java_fn_ty_arg
708 init_meth_params = init_meth_params + ", "
709 init_meth_params = init_meth_params + field_ty.java_ty + " " + field_ty.arg_name
710 init_meth_body = init_meth_body + "this." + field_ty.arg_name + " = " + field_ty.arg_name + "; "
711 out_java += ("\t\t\t" + var.var_name + "(" + init_meth_params + ") { ")
712 out_java += (init_meth_body)
714 out_java += ("\t\t}\n")
715 out_java_enum += ("\t\t}\n")
716 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"
717 java_hu_subclasses = java_hu_subclasses + hu_conv_body
718 java_hu_subclasses = java_hu_subclasses + "\t\t}\n\t}\n"
719 init_meth_jty_strs[var.var_name] = init_meth_jty_str
720 out_java += ("\t\tstatic native void init();\n")
721 out_java += ("\t}\n")
722 out_java_enum += ("\t\tassert false; return null; // Unreachable without extending the (internal) bindings interface\n\t}\n\n")
723 out_java_enum += (java_hu_subclasses)
724 out_java += ("\tstatic { " + struct_name + ".init(); }\n")
725 out_java += ("\tpublic static native " + struct_name + " " + struct_name + "_ref_from_ptr(long ptr);\n");
727 out_c += (self.c_complex_enum_pfx(struct_name, [x.var_name for x in variant_list], init_meth_jty_strs))
729 out_c += (self.c_fn_ty_pfx + self.c_complex_enum_pass_ty(struct_name) + " " + self.c_fn_name_pfx + struct_name.replace("_", "_1") + "_1ref_1from_1ptr (" + self.c_fn_args_pfx + ", " + self.ptr_c_ty + " ptr) {\n")
730 out_c += ("\t" + struct_name + " *obj = (" + struct_name + "*)ptr;\n")
731 out_c += ("\tswitch(obj->tag) {\n")
732 for var in variant_list:
733 out_c += ("\t\tcase " + struct_name + "_" + var.var_name + ": {\n")
735 for idx, field_map in enumerate(var.fields):
736 if field_map.ret_conv is not None:
737 out_c += ("\t\t\t" + field_map.ret_conv[0].replace("\n", "\n\t\t\t"))
738 out_c += ("obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name)
739 out_c += (field_map.ret_conv[1].replace("\n", "\n\t\t\t") + "\n")
740 c_params.append(field_map.ret_conv_name)
742 c_params.append("obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name)
743 out_c += ("\t\t\treturn " + self.c_constr_native_complex_enum(struct_name, var.var_name, c_params) + ";\n")
745 out_c += ("\t\tdefault: abort();\n")
746 out_c += ("\t}\n}\n")
747 out_java_enum += ("}\n")
748 return (out_java, out_java_enum, out_c)