1 from bindingstypes import *
4 def __init__(self, DEBUG):
6 self.c_type_map = dict(
13 self.to_hu_conv_templates = dict(
14 ptr = '{human_type} {var_name}_hu_conv = new {human_type}(null, {var_name});',
15 default = '{human_type} {var_name}_hu_conv = new {human_type}(null, {var_name});'
18 self.common_base = """package org.ldk.structs;
19 import java.util.LinkedList;
22 LinkedList<Object> ptrs_to = new LinkedList();
23 protected CommonBase(long ptr) { this.ptr = ptr; }
24 public long _test_only_get_ptr() { return this.ptr; }
28 self.c_file_pfx = """#include \"org_ldk_impl_bindings.h\"
29 #include <rust_types.h>
30 #include <lightning.h>
32 #include <stdatomic.h>
37 self.c_file_pfx = self.c_file_pfx + """#define MALLOC(a, _) malloc(a)
38 #define FREE(p) if ((long)(p) > 1024) { free(p); }
39 #define DO_ASSERT(a) (void)(a)
43 self.c_file_pfx = self.c_file_pfx + """#include <assert.h>
44 // Always run a, then assert it is true:
45 #define DO_ASSERT(a) do { bool _assert_val = (a); assert(_assert_val); } while(0)
46 // Assert a is true or do nothing
47 #define CHECK(a) DO_ASSERT(a)
49 // Running a leak check across all the allocations and frees of the JDK is a mess,
50 // so instead we implement our own naive leak checker here, relying on the -wrap
51 // linker option to wrap malloc/calloc/realloc/free, tracking everyhing allocated
52 // and free'd in Rust or C across the generated bindings shared library.
56 static mtx_t allocation_mtx;
58 void __attribute__((constructor)) init_mtx() {
59 DO_ASSERT(mtx_init(&allocation_mtx, mtx_plain) == thrd_success);
63 typedef struct allocation {
64 struct allocation* next;
66 const char* struct_name;
70 static allocation* allocation_ll = NULL;
72 void* __real_malloc(size_t len);
73 void* __real_calloc(size_t nmemb, size_t len);
74 static void new_allocation(void* res, const char* struct_name) {
75 allocation* new_alloc = __real_malloc(sizeof(allocation));
77 new_alloc->struct_name = struct_name;
78 new_alloc->bt_len = backtrace(new_alloc->bt, BT_MAX);
79 DO_ASSERT(mtx_lock(&allocation_mtx) == thrd_success);
80 new_alloc->next = allocation_ll;
81 allocation_ll = new_alloc;
82 DO_ASSERT(mtx_unlock(&allocation_mtx) == thrd_success);
84 static void* MALLOC(size_t len, const char* struct_name) {
85 void* res = __real_malloc(len);
86 new_allocation(res, struct_name);
89 void __real_free(void* ptr);
90 static void alloc_freed(void* ptr) {
92 DO_ASSERT(mtx_lock(&allocation_mtx) == thrd_success);
93 allocation* it = allocation_ll;
94 while (it->ptr != ptr) {
95 p = it; it = it->next;
97 fprintf(stderr, "Tried to free unknown pointer %p at:\\n", ptr);
99 int bt_len = backtrace(bt, BT_MAX);
100 backtrace_symbols_fd(bt, bt_len, STDERR_FILENO);
101 fprintf(stderr, "\\n\\n");
102 DO_ASSERT(mtx_unlock(&allocation_mtx) == thrd_success);
103 return; // addrsan should catch malloc-unknown and print more info than we have
106 if (p) { p->next = it->next; } else { allocation_ll = it->next; }
107 DO_ASSERT(mtx_unlock(&allocation_mtx) == thrd_success);
108 DO_ASSERT(it->ptr == ptr);
111 static void FREE(void* ptr) {
112 if ((long)ptr < 1024) return; // Rust loves to create pointers to the NULL page for dummys
117 void* __wrap_malloc(size_t len) {
118 void* res = __real_malloc(len);
119 new_allocation(res, "malloc call");
122 void* __wrap_calloc(size_t nmemb, size_t len) {
123 void* res = __real_calloc(nmemb, len);
124 new_allocation(res, "calloc call");
127 void __wrap_free(void* ptr) {
128 if (ptr == NULL) return;
133 void* __real_realloc(void* ptr, size_t newlen);
134 void* __wrap_realloc(void* ptr, size_t len) {
135 if (ptr != NULL) alloc_freed(ptr);
136 void* res = __real_realloc(ptr, len);
137 new_allocation(res, "realloc call");
140 void __wrap_reallocarray(void* ptr, size_t new_sz) {
141 // Rust doesn't seem to use reallocarray currently
145 void __attribute__((destructor)) check_leaks() {
146 for (allocation* a = allocation_ll; a != NULL; a = a->next) {
147 fprintf(stderr, "%s %p remains:\\n", a->struct_name, a->ptr);
148 backtrace_symbols_fd(a->bt, a->bt_len, STDERR_FILENO);
149 fprintf(stderr, "\\n\\n");
151 DO_ASSERT(allocation_ll == NULL);
154 self.c_file_pfx = self.c_file_pfx + """
155 static jmethodID ordinal_meth = NULL;
156 static jmethodID slicedef_meth = NULL;
157 static jclass slicedef_cls = NULL;
158 JNIEXPORT void Java_org_ldk_impl_bindings_init(JNIEnv * env, jclass _b, jclass enum_class, jclass slicedef_class) {
159 ordinal_meth = (*env)->GetMethodID(env, enum_class, "ordinal", "()I");
160 CHECK(ordinal_meth != NULL);
161 slicedef_meth = (*env)->GetMethodID(env, slicedef_class, "<init>", "(JJJ)V");
162 CHECK(slicedef_meth != NULL);
163 slicedef_cls = (*env)->NewGlobalRef(env, slicedef_class);
164 CHECK(slicedef_cls != NULL);
167 JNIEXPORT jboolean JNICALL Java_org_ldk_impl_bindings_deref_1bool (JNIEnv * env, jclass _a, jlong ptr) {
168 return *((bool*)ptr);
170 JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_deref_1long (JNIEnv * env, jclass _a, jlong ptr) {
171 return *((long*)ptr);
173 JNIEXPORT void JNICALL Java_org_ldk_impl_bindings_free_1heap_1ptr (JNIEnv * env, jclass _a, jlong ptr) {
176 JNIEXPORT jbyteArray JNICALL Java_org_ldk_impl_bindings_read_1bytes (JNIEnv * env, jclass _b, jlong ptr, jlong len) {
177 jbyteArray ret_arr = (*env)->NewByteArray(env, len);
178 (*env)->SetByteArrayRegion(env, ret_arr, 0, len, (unsigned char*)ptr);
181 JNIEXPORT jbyteArray JNICALL Java_org_ldk_impl_bindings_get_1u8_1slice_1bytes (JNIEnv * env, jclass _b, jlong slice_ptr) {
182 LDKu8slice *slice = (LDKu8slice*)slice_ptr;
183 jbyteArray ret_arr = (*env)->NewByteArray(env, slice->datalen);
184 (*env)->SetByteArrayRegion(env, ret_arr, 0, slice->datalen, slice->data);
187 JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_bytes_1to_1u8_1vec (JNIEnv * env, jclass _b, jbyteArray bytes) {
188 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)MALLOC(sizeof(LDKCVec_u8Z), "LDKCVec_u8");
189 vec->datalen = (*env)->GetArrayLength(env, bytes);
190 vec->data = (uint8_t*)MALLOC(vec->datalen, "LDKCVec_u8Z Bytes");
191 (*env)->GetByteArrayRegion (env, bytes, 0, vec->datalen, vec->data);
194 JNIEXPORT jbyteArray JNICALL Java_org_ldk_impl_bindings_txpointer_1get_1buffer (JNIEnv * env, jclass _b, jlong ptr) {
195 LDKTransaction *txdata = (LDKTransaction*)ptr;
197 slice.data = txdata->data;
198 slice.datalen = txdata->datalen;
199 return Java_org_ldk_impl_bindings_get_1u8_1slice_1bytes(env, _b, (long)&slice);
201 JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_new_1txpointer_1copy_1data (JNIEnv * env, jclass _b, jbyteArray bytes) {
202 LDKTransaction *txdata = (LDKTransaction*)MALLOC(sizeof(LDKTransaction), "LDKTransaction");
203 txdata->datalen = (*env)->GetArrayLength(env, bytes);
204 txdata->data = (uint8_t*)MALLOC(txdata->datalen, "Tx Data Bytes");
205 txdata->data_is_owned = false;
206 (*env)->GetByteArrayRegion (env, bytes, 0, txdata->datalen, txdata->data);
209 JNIEXPORT void JNICALL Java_org_ldk_impl_bindings_txpointer_1free (JNIEnv * env, jclass _b, jlong ptr) {
210 LDKTransaction *tx = (LDKTransaction*)ptr;
211 tx->data_is_owned = true;
212 Transaction_free(*tx);
215 JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_vec_1slice_1len (JNIEnv * env, jclass _a, jlong ptr) {
216 // Check offsets of a few Vec types are all consistent as we're meant to be generic across types
217 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_SignatureZ, datalen), "Vec<*> needs to be mapped identically");
218 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_MessageSendEventZ, datalen), "Vec<*> needs to be mapped identically");
219 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_EventZ, datalen), "Vec<*> needs to be mapped identically");
220 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_C2Tuple_usizeTransactionZZ, datalen), "Vec<*> needs to be mapped identically");
221 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)ptr;
222 return (long)vec->datalen;
224 JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_new_1empty_1slice_1vec (JNIEnv * env, jclass _b) {
225 // Check sizes of a few Vec types are all consistent as we're meant to be generic across types
226 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_SignatureZ), "Vec<*> needs to be mapped identically");
227 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_MessageSendEventZ), "Vec<*> needs to be mapped identically");
228 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_EventZ), "Vec<*> needs to be mapped identically");
229 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_C2Tuple_usizeTransactionZZ), "Vec<*> needs to be mapped identically");
230 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)MALLOC(sizeof(LDKCVec_u8Z), "Empty LDKCVec");
236 // We assume that CVec_u8Z and u8slice are the same size and layout (and thus pointers to the two can be mixed)
237 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKu8slice), "Vec<u8> and [u8] need to have been mapped identically");
238 _Static_assert(offsetof(LDKCVec_u8Z, data) == offsetof(LDKu8slice, data), "Vec<u8> and [u8] need to have been mapped identically");
239 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKu8slice, datalen), "Vec<u8> and [u8] need to have been mapped identically");
241 _Static_assert(sizeof(jlong) == sizeof(int64_t), "We assume that j-types are the same as C types");
242 _Static_assert(sizeof(jbyte) == sizeof(char), "We assume that j-types are the same as C types");
243 _Static_assert(sizeof(void*) <= 8, "Pointers must fit into 64 bits");
245 typedef jlongArray int64_tArray;
246 typedef jbyteArray int8_tArray;
250 self.hu_struct_file_prefix = """package org.ldk.structs;
252 import org.ldk.impl.bindings;
253 import org.ldk.enums.*;
254 import org.ldk.util.*;
255 import java.util.Arrays;
257 @SuppressWarnings("unchecked") // We correctly assign various generic arrays
259 self.c_fn_ty_pfx = "JNIEXPORT "
260 self.c_fn_name_pfx = "JNICALL Java_org_ldk_impl_bindings_"
261 self.c_fn_args_pfx = "JNIEnv *env, jclass clz"
262 self.file_ext = ".java"
263 self.ptr_c_ty = "int64_t"
264 self.ptr_native_ty = "long"
265 self.result_c_ty = "jclass"
266 self.ptr_arr = "jobjectArray"
267 self.get_native_arr_len_call = ("(*env)->GetArrayLength(env, ", ")")
268 self.get_native_arr_ptr_call = ("(*env)->GetPrimitiveArrayCritical(env, ", ", NULL)")
270 def release_native_arr_ptr_call(self, arr_var, arr_ptr_var):
271 return "(*env)->ReleasePrimitiveArrayCritical(env, " + arr_var + ", " + arr_ptr_var + ", 0)"
272 def create_native_arr_call(self, arr_len, ty_info):
273 if ty_info.c_ty == "int8_tArray":
274 return "(*env)->NewByteArray(env, " + arr_len + ")"
276 return "(*env)->New" + ty_info.java_ty.strip("[]").title() + "Array(env, " + arr_len + ")"
277 def set_native_arr_contents(self, arr_name, arr_len, ty_info):
278 if ty_info.c_ty == "int8_tArray":
279 return ("(*env)->SetByteArrayRegion(env, " + arr_name + ", 0, " + arr_len + ", ", ")")
282 def get_native_arr_contents(self, arr_name, dest_name, arr_len, ty_info, copy):
283 if ty_info.c_ty == "int8_tArray":
285 return "(*env)->GetByteArrayRegion(env, " + arr_name + ", 0, " + arr_len + ", " + dest_name + ")"
287 return "(*env)->GetByteArrayElements (env, " + arr_name + ", NULL)"
288 elif not ty_info.java_ty[:len(ty_info.java_ty) - 2].endswith("[]"):
289 return "(*env)->Get" + ty_info.subty.java_ty.title() + "ArrayElements (env, " + arr_name + ", NULL)"
292 def get_native_arr_elem(self, arr_name, idxc, ty_info):
293 if self.get_native_arr_contents(arr_name, "", "", ty_info, False) is None:
294 return "(*env)->GetObjectArrayElement(env, " + arr_name + ", " + idxc + ")"
296 assert False # Only called if above is None
297 def cleanup_native_arr_ref_contents(self, arr_name, dest_name, arr_len, ty_info):
298 if ty_info.c_ty == "int8_tArray":
299 return "(*env)->ReleaseByteArrayElements(env, " + arr_name + ", (int8_t*)" + dest_name + ", 0);"
301 return "(*env)->Release" + ty_info.java_ty.strip("[]").title() + "ArrayElements(env, " + arr_name + ", " + dest_name + ", 0)"
303 def init_str(self, c_array_class_caches):
305 for ty in c_array_class_caches:
306 res = res + "static jclass " + ty + "_clz = NULL;\n"
307 res = res + "JNIEXPORT void Java_org_ldk_impl_bindings_init_1class_1cache(JNIEnv * env, jclass clz) {\n"
308 for ty in c_array_class_caches:
309 res = res + "\t" + ty + "_clz = (*env)->FindClass(env, \"" + ty.replace("arr_of_", "[") + "\");\n"
310 res = res + "\tCHECK(" + ty + "_clz != NULL);\n"
311 res = res + "\t" + ty + "_clz = (*env)->NewGlobalRef(env, " + ty + "_clz);\n"
315 def native_c_unitary_enum_map(self, struct_name, variants):
316 out_java_enum = "package org.ldk.enums;\n\n"
319 out_c = out_c + "static inline " + struct_name + " " + struct_name + "_from_java(" + self.c_fn_args_pfx + ") {\n"
320 out_c = out_c + "\tswitch ((*env)->CallIntMethod(env, clz, ordinal_meth)) {\n"
322 out_java_enum = out_java_enum + "public enum " + struct_name + " {\n"
325 out_java_enum = out_java_enum + "\t" + var + ",\n"
326 out_c = out_c + "\t\tcase %d: return %s;\n" % (ord_v, var)
328 out_java_enum = out_java_enum + "\t; static native void init();\n"
329 out_java_enum = out_java_enum + "\tstatic { init(); }\n"
330 out_java_enum = out_java_enum + "}"
331 out_java = out_java + "\tstatic { " + struct_name + ".values(); /* Force enum statics to run */ }\n"
332 out_c = out_c + "\t}\n"
333 out_c = out_c + "\tabort();\n"
334 out_c = out_c + "}\n"
336 out_c = out_c + "static jclass " + struct_name + "_class = NULL;\n"
338 out_c = out_c + "static jfieldID " + struct_name + "_" + var + " = NULL;\n"
339 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"
340 out_c = out_c + "\t" + struct_name + "_class = (*env)->NewGlobalRef(env, clz);\n"
341 out_c = out_c + "\tCHECK(" + struct_name + "_class != NULL);\n"
343 out_c = out_c + "\t" + struct_name + "_" + var + " = (*env)->GetStaticFieldID(env, " + struct_name + "_class, \"" + var + "\", \"Lorg/ldk/enums/" + struct_name + ";\");\n"
344 out_c = out_c + "\tCHECK(" + struct_name + "_" + var + " != NULL);\n"
345 out_c = out_c + "}\n"
346 out_c = out_c + "static inline jclass " + struct_name + "_to_java(JNIEnv *env, " + struct_name + " val) {\n"
347 out_c = out_c + "\tswitch (val) {\n"
350 out_c = out_c + "\t\tcase " + var + ":\n"
351 out_c = out_c + "\t\t\treturn (*env)->GetStaticObjectField(env, " + struct_name + "_class, " + struct_name + "_" + var + ");\n"
353 out_c = out_c + "\t\tdefault: abort();\n"
354 out_c = out_c + "\t}\n"
355 out_c = out_c + "}\n\n"
357 return (out_c, out_java_enum, out_java)
359 def c_unitary_enum_to_native_call(self, ty_info):
360 return (ty_info.rust_obj + "_to_java(env, ", ")")
361 def native_unitary_enum_to_c_call(self, ty_info):
362 return (ty_info.rust_obj + "_from_java(env, ", ")")
364 def c_complex_enum_pfx(self, struct_name, variants, init_meth_jty_strs):
367 out_c = out_c + "static jclass " + struct_name + "_" + var + "_class = NULL;\n"
368 out_c = out_c + "static jmethodID " + struct_name + "_" + var + "_meth = NULL;\n"
369 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"
370 for var_name in variants:
371 out_c = out_c + "\t" + struct_name + "_" + var_name + "_class =\n"
372 out_c = out_c + "\t\t(*env)->NewGlobalRef(env, (*env)->FindClass(env, \"Lorg/ldk/impl/bindings$" + struct_name + "$" + var_name + ";\"));\n"
373 out_c = out_c + "\tCHECK(" + struct_name + "_" + var_name + "_class != NULL);\n"
374 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"
375 out_c = out_c + "\tCHECK(" + struct_name + "_" + var_name + "_meth != NULL);\n"
376 out_c = out_c + "}\n"
379 def c_complex_enum_pass_ty(self, struct_name):
382 def c_constr_native_complex_enum(self, struct_name, variant, c_params):
383 ret = "(*env)->NewObject(env, " + struct_name + "_" + variant + "_class, " + struct_name + "_" + variant + "_meth"
384 for param in c_params:
385 ret = ret + ", " + param
388 def native_c_map_trait(self, struct_name, field_vars, field_fns):
392 # First generate most of the Java code, note that we need information about java method argument strings for C
393 out_java_trait = out_java_trait + self.hu_struct_file_prefix
394 out_java_trait = out_java_trait + "public class " + struct_name.replace("LDK","") + " extends CommonBase {\n"
395 out_java_trait = out_java_trait + "\tfinal bindings." + struct_name + " bindings_instance;\n"
396 out_java_trait = out_java_trait + "\t" + struct_name.replace("LDK", "") + "(Object _dummy, long ptr) { super(ptr); bindings_instance = null; }\n"
397 out_java_trait = out_java_trait + "\tprivate " + struct_name.replace("LDK", "") + "(bindings." + struct_name + " arg"
398 for var in field_vars:
399 if isinstance(var, ConvInfo):
400 out_java_trait = out_java_trait + ", " + var.java_hu_ty + " " + var.arg_name
402 out_java_trait = out_java_trait + ", bindings." + var[0] + " " + var[1]
403 out_java_trait = out_java_trait + ") {\n"
404 out_java_trait = out_java_trait + "\t\tsuper(bindings." + struct_name + "_new(arg"
405 for var in field_vars:
406 if isinstance(var, ConvInfo):
407 if var.from_hu_conv is not None:
408 out_java_trait = out_java_trait + ", " + var.from_hu_conv[0]
410 out_java_trait = out_java_trait + ", " + var.arg_name
412 out_java_trait = out_java_trait + ", " + var[1]
413 out_java_trait = out_java_trait + "));\n"
414 out_java_trait = out_java_trait + "\t\tthis.ptrs_to.add(arg);\n"
415 for var in field_vars:
416 if isinstance(var, ConvInfo):
417 if var.from_hu_conv is not None and var.from_hu_conv[1] != "":
418 out_java_trait = out_java_trait + "\t\t" + var.from_hu_conv[1] + ";\n"
420 out_java_trait = out_java_trait + "\t\tthis.ptrs_to.add(" + var[1] + ");\n"
421 out_java_trait = out_java_trait + "\t\tthis.bindings_instance = arg;\n"
422 out_java_trait = out_java_trait + "\t}\n"
423 out_java_trait = out_java_trait + "\t@Override @SuppressWarnings(\"deprecation\")\n"
424 out_java_trait = out_java_trait + "\tprotected void finalize() throws Throwable {\n"
425 out_java_trait = out_java_trait + "\t\tif (ptr != 0) { bindings." + struct_name.replace("LDK","") + "_free(ptr); } super.finalize();\n"
426 out_java_trait = out_java_trait + "\t}\n\n"
428 java_trait_constr = "\tprivate static class " + struct_name + "Holder { " + struct_name.replace("LDK", "") + " held; }\n"
429 java_trait_constr = java_trait_constr + "\tpublic static " + struct_name.replace("LDK", "") + " new_impl(" + struct_name.replace("LDK", "") + "Interface arg"
430 for var in field_vars:
431 if isinstance(var, ConvInfo):
432 java_trait_constr = java_trait_constr + ", " + var.java_hu_ty + " " + var.arg_name
434 # Ideally we'd be able to take any instance of the interface, but our C code can only represent
435 # Java-implemented version, so we require users pass a Java implementation here :/
436 java_trait_constr = java_trait_constr + ", " + var[0].replace("LDK", "") + "." + var[0].replace("LDK", "") + "Interface " + var[1] + "_impl"
437 java_trait_constr = java_trait_constr + ") {\n\t\tfinal " + struct_name + "Holder impl_holder = new " + struct_name + "Holder();\n"
438 java_trait_constr = java_trait_constr + "\t\timpl_holder.held = new " + struct_name.replace("LDK", "") + "(new bindings." + struct_name + "() {\n"
439 out_java_trait = out_java_trait + "\tpublic static interface " + struct_name.replace("LDK", "") + "Interface {\n"
440 out_java = out_java + "\tpublic interface " + struct_name + " {\n"
442 for fn_line in field_fns:
443 java_meth_descr = "("
444 if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
445 out_java = out_java + "\t\t " + fn_line.ret_ty_info.java_ty + " " + fn_line.fn_name + "("
446 java_trait_constr = java_trait_constr + "\t\t\t@Override public " + fn_line.ret_ty_info.java_ty + " " + fn_line.fn_name + "("
447 out_java_trait = out_java_trait + "\t\t" + fn_line.ret_ty_info.java_hu_ty + " " + fn_line.fn_name + "("
449 for idx, arg_conv_info in enumerate(fn_line.args_ty):
451 out_java = out_java + ", "
452 java_trait_constr = java_trait_constr + ", "
453 out_java_trait = out_java_trait + ", "
454 out_java = out_java + arg_conv_info.java_ty + " " + arg_conv_info.arg_name
455 out_java_trait = out_java_trait + arg_conv_info.java_hu_ty + " " + arg_conv_info.arg_name
456 java_trait_constr = java_trait_constr + arg_conv_info.java_ty + " " + arg_conv_info.arg_name
457 java_meth_descr = java_meth_descr + arg_conv_info.java_fn_ty_arg
458 java_meth_descr = java_meth_descr + ")" + fn_line.ret_ty_info.java_fn_ty_arg
459 java_meths.append((fn_line.fn_name, java_meth_descr))
461 out_java = out_java + ");\n"
462 out_java_trait = out_java_trait + ");\n"
463 java_trait_constr = java_trait_constr + ") {\n"
465 for arg_info in fn_line.args_ty:
466 if arg_info.to_hu_conv is not None:
467 java_trait_constr = java_trait_constr + "\t\t\t\t" + arg_info.to_hu_conv.replace("\n", "\n\t\t\t\t") + "\n"
469 if fn_line.ret_ty_info.java_ty != "void":
470 java_trait_constr = java_trait_constr + "\t\t\t\t" + fn_line.ret_ty_info.java_hu_ty + " ret = arg." + fn_line.fn_name + "("
472 java_trait_constr = java_trait_constr + "\t\t\t\targ." + fn_line.fn_name + "("
474 for idx, arg_info in enumerate(fn_line.args_ty):
476 java_trait_constr = java_trait_constr + ", "
477 if arg_info.to_hu_conv_name is not None:
478 java_trait_constr = java_trait_constr + arg_info.to_hu_conv_name
480 java_trait_constr = java_trait_constr + arg_info.arg_name
482 java_trait_constr = java_trait_constr + ");\n"
483 if fn_line.ret_ty_info.java_ty != "void":
484 if fn_line.ret_ty_info.from_hu_conv is not None:
485 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"
486 if fn_line.ret_ty_info.from_hu_conv[1] != "":
487 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"
488 #if fn_line.ret_ty_info.rust_obj in result_types:
489 # XXX: We need to handle this in conversion logic so that its cross-language!
490 # Avoid double-free by breaking the result - we should learn to clone these and then we can be safe instead
491 # java_trait_constr = java_trait_constr + "\t\t\t\tret.ptr = 0;\n"
492 java_trait_constr = java_trait_constr + "\t\t\t\treturn result;\n"
494 java_trait_constr = java_trait_constr + "\t\t\t\treturn ret;\n"
495 java_trait_constr = java_trait_constr + "\t\t\t}\n"
496 java_trait_constr = java_trait_constr + "\t\t}"
497 for var in field_vars:
498 if isinstance(var, ConvInfo):
499 java_trait_constr = java_trait_constr + ", " + var.arg_name
501 java_trait_constr = java_trait_constr + ", " + var[1] + ".new_impl(" + var[1] + "_impl).bindings_instance"
502 out_java_trait = out_java_trait + "\t}\n"
503 out_java_trait = out_java_trait + java_trait_constr + ");\n\t\treturn impl_holder.held;\n\t}\n"
505 out_java = out_java + "\t}\n"
507 out_java = out_java + "\tpublic static native long " + struct_name + "_new(" + struct_name + " impl"
508 for var in field_vars:
509 if isinstance(var, ConvInfo):
510 out_java = out_java + ", " + var.java_ty + " " + var.arg_name
512 out_java = out_java + ", " + var[0] + " " + var[1]
513 out_java = out_java + ");\n"
514 out_java = out_java + "\tpublic static native " + struct_name + " " + struct_name + "_get_obj_from_jcalls(long val);\n"
516 # Now that we've written out our java code (and created java_meths), generate C
517 out_c = "typedef struct " + struct_name + "_JCalls {\n"
518 out_c = out_c + "\tatomic_size_t refcnt;\n"
519 out_c = out_c + "\tJavaVM *vm;\n"
520 out_c = out_c + "\tjweak o;\n"
521 for var in field_vars:
522 if isinstance(var, ConvInfo):
523 # We're a regular ol' field
527 out_c = out_c + "\t" + var[0] + "_JCalls* " + var[1] + ";\n"
529 if fn.fn_name != "free" and fn.fn_name != "clone":
530 out_c = out_c + "\tjmethodID " + fn.fn_name + "_meth;\n"
531 out_c = out_c + "} " + struct_name + "_JCalls;\n"
533 for fn_line in field_fns:
534 if fn_line.fn_name == "free":
535 out_c = out_c + "static void " + struct_name + "_JCalls_free(void* this_arg) {\n"
536 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
537 out_c = out_c + "\tif (atomic_fetch_sub_explicit(&j_calls->refcnt, 1, memory_order_acquire) == 1) {\n"
538 out_c = out_c + "\t\tJNIEnv *env;\n"
539 out_c = out_c + "\t\tDO_ASSERT((*j_calls->vm)->GetEnv(j_calls->vm, (void**)&env, JNI_VERSION_1_8) == JNI_OK);\n"
540 out_c = out_c + "\t\t(*env)->DeleteWeakGlobalRef(env, j_calls->o);\n"
541 out_c = out_c + "\t\tFREE(j_calls);\n"
542 out_c = out_c + "\t}\n}\n"
544 for idx, fn_line in enumerate(field_fns):
545 if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
546 assert fn_line.ret_ty_info.ty_info.get_full_rust_ty()[1] == ""
547 out_c = out_c + fn_line.ret_ty_info.ty_info.get_full_rust_ty()[0] + " " + fn_line.fn_name + "_jcall("
548 if fn_line.self_is_const:
549 out_c = out_c + "const void* this_arg"
551 out_c = out_c + "void* this_arg"
553 for idx, arg in enumerate(fn_line.args_ty):
554 out_c = out_c + ", " + arg.ty_info.get_full_rust_ty()[0] + " " + arg.arg_name + arg.ty_info.get_full_rust_ty()[1]
556 out_c = out_c + ") {\n"
557 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
558 out_c = out_c + "\tJNIEnv *env;\n"
559 out_c = out_c + "\tDO_ASSERT((*j_calls->vm)->GetEnv(j_calls->vm, (void**)&env, JNI_VERSION_1_8) == JNI_OK);\n"
561 for arg_info in fn_line.args_ty:
562 if arg_info.ret_conv is not None:
563 out_c = out_c + "\t" + arg_info.ret_conv[0].replace('\n', '\n\t')
564 out_c = out_c + arg_info.arg_name
565 out_c = out_c + arg_info.ret_conv[1].replace('\n', '\n\t') + "\n"
567 out_c = out_c + "\tjobject obj = (*env)->NewLocalRef(env, j_calls->o);\n\tCHECK(obj != NULL);\n"
568 if fn_line.ret_ty_info.c_ty.endswith("Array"):
569 out_c = out_c + "\t" + fn_line.ret_ty_info.c_ty + " arg = (*env)->CallObjectMethod(env, obj, j_calls->" + fn_line.fn_name + "_meth"
570 elif not fn_line.ret_ty_info.passed_as_ptr:
571 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"
573 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"
575 for idx, arg_info in enumerate(fn_line.args_ty):
576 if arg_info.ret_conv is not None:
577 out_c = out_c + ", " + arg_info.ret_conv_name
579 out_c = out_c + ", " + arg_info.arg_name
580 out_c = out_c + ");\n"
581 if fn_line.ret_ty_info.arg_conv is not None:
582 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"
584 out_c = out_c + "}\n"
586 # Write out a clone function whether we need one or not, as we use them in moving to rust
587 out_c = out_c + "static void* " + struct_name + "_JCalls_clone(const void* this_arg) {\n"
588 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
589 out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->refcnt, 1, memory_order_release);\n"
590 for var in field_vars:
591 if not isinstance(var, ConvInfo):
592 out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->" + var[1] + "->refcnt, 1, memory_order_release);\n"
593 out_c = out_c + "\treturn (void*) this_arg;\n"
594 out_c = out_c + "}\n"
596 out_c = out_c + "static inline " + struct_name + " " + struct_name + "_init (" + self.c_fn_args_pfx + ", jobject o"
597 for var in field_vars:
598 if isinstance(var, ConvInfo):
599 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
601 out_c = out_c + ", jobject " + var[1]
602 out_c = out_c + ") {\n"
604 out_c = out_c + "\tjclass c = (*env)->GetObjectClass(env, o);\n"
605 out_c = out_c + "\tCHECK(c != NULL);\n"
606 out_c = out_c + "\t" + struct_name + "_JCalls *calls = MALLOC(sizeof(" + struct_name + "_JCalls), \"" + struct_name + "_JCalls\");\n"
607 out_c = out_c + "\tatomic_init(&calls->refcnt, 1);\n"
608 out_c = out_c + "\tDO_ASSERT((*env)->GetJavaVM(env, &calls->vm) == 0);\n"
609 out_c = out_c + "\tcalls->o = (*env)->NewWeakGlobalRef(env, o);\n"
611 for (fn_name, java_meth_descr) in java_meths:
612 if fn_name != "free" and fn_name != "clone":
613 out_c = out_c + "\tcalls->" + fn_name + "_meth = (*env)->GetMethodID(env, c, \"" + fn_name + "\", \"" + java_meth_descr + "\");\n"
614 out_c = out_c + "\tCHECK(calls->" + fn_name + "_meth != NULL);\n"
616 for var in field_vars:
617 if isinstance(var, ConvInfo) and var.arg_conv is not None:
618 out_c = out_c + "\n\t" + var.arg_conv.replace("\n", "\n\t") +"\n"
619 out_c = out_c + "\n\t" + struct_name + " ret = {\n"
620 out_c = out_c + "\t\t.this_arg = (void*) calls,\n"
621 for fn_line in field_fns:
622 if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
623 out_c = out_c + "\t\t." + fn_line.fn_name + " = " + fn_line.fn_name + "_jcall,\n"
624 elif fn_line.fn_name == "free":
625 out_c = out_c + "\t\t.free = " + struct_name + "_JCalls_free,\n"
627 out_c = out_c + "\t\t.clone = " + struct_name + "_JCalls_clone,\n"
628 for var in field_vars:
629 if isinstance(var, ConvInfo):
630 if var.arg_conv_name is not None:
631 out_c = out_c + "\t\t." + var.arg_name + " = " + var.arg_conv_name + ",\n"
632 out_c = out_c + "\t\t.set_" + var.arg_name + " = NULL,\n"
634 out_c = out_c + "\t\t." + var.var_name + " = " + var.var_name + ",\n"
635 out_c = out_c + "\t\t.set_" + var.var_name + " = NULL,\n"
637 out_c = out_c + "\t\t." + var[1] + " = " + var[0] + "_init(env, clz, " + var[1] + "),\n"
638 out_c = out_c + "\t};\n"
639 for var in field_vars:
640 if not isinstance(var, ConvInfo):
641 out_c = out_c + "\tcalls->" + var[1] + " = ret." + var[1] + ".this_arg;\n"
642 out_c = out_c + "\treturn ret;\n"
643 out_c = out_c + "}\n"
645 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"
646 for var in field_vars:
647 if isinstance(var, ConvInfo):
648 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
650 out_c = out_c + ", jobject " + var[1]
651 out_c = out_c + ") {\n"
652 out_c = out_c + "\t" + struct_name + " *res_ptr = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n"
653 out_c = out_c + "\t*res_ptr = " + struct_name + "_init(env, clz, o"
654 for var in field_vars:
655 if isinstance(var, ConvInfo):
656 out_c = out_c + ", " + var.arg_name
658 out_c = out_c + ", " + var[1]
659 out_c = out_c + ");\n"
660 out_c = out_c + "\treturn (long)res_ptr;\n"
661 out_c = out_c + "}\n"
663 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"
664 out_c = out_c + "\tjobject ret = (*env)->NewLocalRef(env, ((" + struct_name + "_JCalls*)val)->o);\n"
665 out_c = out_c + "\tCHECK(ret != NULL);\n"
666 out_c = out_c + "\treturn ret;\n"
667 out_c = out_c + "}\n"
669 return (out_java, out_java_trait, out_c)
671 def map_complex_enum(self, struct_name, variant_list, camel_to_snake):
672 java_hu_type = struct_name.replace("LDK", "")
677 out_java_enum += (self.hu_struct_file_prefix)
678 out_java_enum += ("public class " + java_hu_type + " extends CommonBase {\n")
679 out_java_enum += ("\tprivate " + java_hu_type + "(Object _dummy, long ptr) { super(ptr); }\n")
680 out_java_enum += ("\t@Override @SuppressWarnings(\"deprecation\")\n")
681 out_java_enum += ("\tprotected void finalize() throws Throwable {\n")
682 out_java_enum += ("\t\tsuper.finalize();\n")
683 out_java_enum += ("\t\tif (ptr != 0) { bindings." + java_hu_type + "_free(ptr); }\n")
684 out_java_enum += ("\t}\n")
685 out_java_enum += ("\tstatic " + java_hu_type + " constr_from_ptr(long ptr) {\n")
686 out_java_enum += ("\t\tbindings." + struct_name + " raw_val = bindings." + struct_name + "_ref_from_ptr(ptr);\n")
687 java_hu_subclasses = ""
689 init_meth_jty_strs = {}
691 out_java += ("\tpublic static class " + struct_name + " {\n")
692 out_java += ("\t\tprivate " + struct_name + "() {}\n")
693 for var in variant_list:
694 out_java += ("\t\tpublic final static class " + var.var_name + " extends " + struct_name + " {\n")
695 java_hu_subclasses = java_hu_subclasses + "\tpublic final static class " + var.var_name + " extends " + java_hu_type + " {\n"
696 out_java_enum += ("\t\tif (raw_val.getClass() == bindings." + struct_name + "." + var.var_name + ".class) {\n")
697 out_java_enum += ("\t\t\treturn new " + var.var_name + "(ptr, (bindings." + struct_name + "." + var.var_name + ")raw_val);\n")
698 init_meth_jty_str = ""
699 init_meth_params = ""
702 for idx, field_ty in enumerate(var.fields):
703 out_java += ("\t\t\tpublic " + field_ty.java_ty + " " + field_ty.arg_name + ";\n")
704 java_hu_subclasses = java_hu_subclasses + "\t\tpublic final " + field_ty.java_hu_ty + " " + field_ty.arg_name + ";\n"
705 if field_ty.to_hu_conv is not None:
706 hu_conv_body = hu_conv_body + "\t\t\t" + field_ty.java_ty + " " + field_ty.arg_name + " = obj." + field_ty.arg_name + ";\n"
707 hu_conv_body = hu_conv_body + "\t\t\t" + field_ty.to_hu_conv.replace("\n", "\n\t\t\t") + "\n"
708 hu_conv_body = hu_conv_body + "\t\t\tthis." + field_ty.arg_name + " = " + field_ty.to_hu_conv_name + ";\n"
710 hu_conv_body = hu_conv_body + "\t\t\tthis." + field_ty.arg_name + " = obj." + field_ty.arg_name + ";\n"
711 init_meth_jty_str = init_meth_jty_str + field_ty.java_fn_ty_arg
713 init_meth_params = init_meth_params + ", "
714 init_meth_params = init_meth_params + field_ty.java_ty + " " + field_ty.arg_name
715 init_meth_body = init_meth_body + "this." + field_ty.arg_name + " = " + field_ty.arg_name + "; "
716 out_java += ("\t\t\t" + var.var_name + "(" + init_meth_params + ") { ")
717 out_java += (init_meth_body)
719 out_java += ("\t\t}\n")
720 out_java_enum += ("\t\t}\n")
721 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"
722 java_hu_subclasses = java_hu_subclasses + hu_conv_body
723 java_hu_subclasses = java_hu_subclasses + "\t\t}\n\t}\n"
724 init_meth_jty_strs[var.var_name] = init_meth_jty_str
725 out_java += ("\t\tstatic native void init();\n")
726 out_java += ("\t}\n")
727 out_java_enum += ("\t\tassert false; return null; // Unreachable without extending the (internal) bindings interface\n\t}\n\n")
728 out_java_enum += (java_hu_subclasses)
729 out_java += ("\tstatic { " + struct_name + ".init(); }\n")
730 out_java += ("\tpublic static native " + struct_name + " " + struct_name + "_ref_from_ptr(long ptr);\n");
732 out_c += (self.c_complex_enum_pfx(struct_name, [x.var_name for x in variant_list], init_meth_jty_strs))
734 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")
735 out_c += ("\t" + struct_name + " *obj = (" + struct_name + "*)ptr;\n")
736 out_c += ("\tswitch(obj->tag) {\n")
737 for var in variant_list:
738 out_c += ("\t\tcase " + struct_name + "_" + var.var_name + ": {\n")
740 for idx, field_map in enumerate(var.fields):
741 if field_map.ret_conv is not None:
742 out_c += ("\t\t\t" + field_map.ret_conv[0].replace("\n", "\n\t\t\t"))
743 out_c += ("obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name)
744 out_c += (field_map.ret_conv[1].replace("\n", "\n\t\t\t") + "\n")
745 c_params.append(field_map.ret_conv_name)
747 c_params.append("obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name)
748 out_c += ("\t\t\treturn " + self.c_constr_native_complex_enum(struct_name, var.var_name, c_params) + ";\n")
750 out_c += ("\t\tdefault: abort();\n")
751 out_c += ("\t}\n}\n")
752 out_java_enum += ("}\n")
753 return (out_java, out_java_enum, out_c)