1 from bindingstypes import *
4 def __init__(self, DEBUG):
5 self.common_base = """package org.ldk.structs;
6 import java.util.LinkedList;
9 LinkedList<Object> ptrs_to = new LinkedList();
10 protected CommonBase(long ptr) { this.ptr = ptr; }
11 public long _test_only_get_ptr() { return this.ptr; }
15 self.c_file_pfx = """#include \"org_ldk_impl_bindings.h\"
16 #include <rust_types.h>
17 #include <lightning.h>
19 #include <stdatomic.h>
24 self.c_file_pfx = self.c_file_pfx + """#define MALLOC(a, _) malloc(a)
25 #define FREE(p) if ((long)(p) > 1024) { free(p); }
26 #define DO_ASSERT(a) (void)(a)
30 self.c_file_pfx = self.c_file_pfx + """#include <assert.h>
31 // Always run a, then assert it is true:
32 #define DO_ASSERT(a) do { bool _assert_val = (a); assert(_assert_val); } while(0)
33 // Assert a is true or do nothing
34 #define CHECK(a) DO_ASSERT(a)
36 // Running a leak check across all the allocations and frees of the JDK is a mess,
37 // so instead we implement our own naive leak checker here, relying on the -wrap
38 // linker option to wrap malloc/calloc/realloc/free, tracking everyhing allocated
39 // and free'd in Rust or C across the generated bindings shared library.
43 static mtx_t allocation_mtx;
45 void __attribute__((constructor)) init_mtx() {
46 DO_ASSERT(mtx_init(&allocation_mtx, mtx_plain) == thrd_success);
50 typedef struct allocation {
51 struct allocation* next;
53 const char* struct_name;
57 static allocation* allocation_ll = NULL;
59 void* __real_malloc(size_t len);
60 void* __real_calloc(size_t nmemb, size_t len);
61 static void new_allocation(void* res, const char* struct_name) {
62 allocation* new_alloc = __real_malloc(sizeof(allocation));
64 new_alloc->struct_name = struct_name;
65 new_alloc->bt_len = backtrace(new_alloc->bt, BT_MAX);
66 DO_ASSERT(mtx_lock(&allocation_mtx) == thrd_success);
67 new_alloc->next = allocation_ll;
68 allocation_ll = new_alloc;
69 DO_ASSERT(mtx_unlock(&allocation_mtx) == thrd_success);
71 static void* MALLOC(size_t len, const char* struct_name) {
72 void* res = __real_malloc(len);
73 new_allocation(res, struct_name);
76 void __real_free(void* ptr);
77 static void alloc_freed(void* ptr) {
79 DO_ASSERT(mtx_lock(&allocation_mtx) == thrd_success);
80 allocation* it = allocation_ll;
81 while (it->ptr != ptr) {
82 p = it; it = it->next;
84 fprintf(stderr, "Tried to free unknown pointer %p at:\\n", ptr);
86 int bt_len = backtrace(bt, BT_MAX);
87 backtrace_symbols_fd(bt, bt_len, STDERR_FILENO);
88 fprintf(stderr, "\\n\\n");
89 DO_ASSERT(mtx_unlock(&allocation_mtx) == thrd_success);
90 return; // addrsan should catch malloc-unknown and print more info than we have
93 if (p) { p->next = it->next; } else { allocation_ll = it->next; }
94 DO_ASSERT(mtx_unlock(&allocation_mtx) == thrd_success);
95 DO_ASSERT(it->ptr == ptr);
98 static void FREE(void* ptr) {
99 if ((long)ptr < 1024) return; // Rust loves to create pointers to the NULL page for dummys
104 void* __wrap_malloc(size_t len) {
105 void* res = __real_malloc(len);
106 new_allocation(res, "malloc call");
109 void* __wrap_calloc(size_t nmemb, size_t len) {
110 void* res = __real_calloc(nmemb, len);
111 new_allocation(res, "calloc call");
114 void __wrap_free(void* ptr) {
115 if (ptr == NULL) return;
120 void* __real_realloc(void* ptr, size_t newlen);
121 void* __wrap_realloc(void* ptr, size_t len) {
122 if (ptr != NULL) alloc_freed(ptr);
123 void* res = __real_realloc(ptr, len);
124 new_allocation(res, "realloc call");
127 void __wrap_reallocarray(void* ptr, size_t new_sz) {
128 // Rust doesn't seem to use reallocarray currently
132 void __attribute__((destructor)) check_leaks() {
133 for (allocation* a = allocation_ll; a != NULL; a = a->next) {
134 fprintf(stderr, "%s %p remains:\\n", a->struct_name, a->ptr);
135 backtrace_symbols_fd(a->bt, a->bt_len, STDERR_FILENO);
136 fprintf(stderr, "\\n\\n");
138 DO_ASSERT(allocation_ll == NULL);
141 self.c_file_pfx = self.c_file_pfx + """
142 static jmethodID ordinal_meth = NULL;
143 static jmethodID slicedef_meth = NULL;
144 static jclass slicedef_cls = NULL;
145 JNIEXPORT void Java_org_ldk_impl_bindings_init(JNIEnv * env, jclass _b, jclass enum_class, jclass slicedef_class) {
146 ordinal_meth = (*env)->GetMethodID(env, enum_class, "ordinal", "()I");
147 CHECK(ordinal_meth != NULL);
148 slicedef_meth = (*env)->GetMethodID(env, slicedef_class, "<init>", "(JJJ)V");
149 CHECK(slicedef_meth != NULL);
150 slicedef_cls = (*env)->NewGlobalRef(env, slicedef_class);
151 CHECK(slicedef_cls != NULL);
154 JNIEXPORT jboolean JNICALL Java_org_ldk_impl_bindings_deref_1bool (JNIEnv * env, jclass _a, jlong ptr) {
155 return *((bool*)ptr);
157 JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_deref_1long (JNIEnv * env, jclass _a, jlong ptr) {
158 return *((long*)ptr);
160 JNIEXPORT void JNICALL Java_org_ldk_impl_bindings_free_1heap_1ptr (JNIEnv * env, jclass _a, jlong ptr) {
163 JNIEXPORT jbyteArray JNICALL Java_org_ldk_impl_bindings_read_1bytes (JNIEnv * env, jclass _b, jlong ptr, jlong len) {
164 jbyteArray ret_arr = (*env)->NewByteArray(env, len);
165 (*env)->SetByteArrayRegion(env, ret_arr, 0, len, (unsigned char*)ptr);
168 JNIEXPORT jbyteArray JNICALL Java_org_ldk_impl_bindings_get_1u8_1slice_1bytes (JNIEnv * env, jclass _b, jlong slice_ptr) {
169 LDKu8slice *slice = (LDKu8slice*)slice_ptr;
170 jbyteArray ret_arr = (*env)->NewByteArray(env, slice->datalen);
171 (*env)->SetByteArrayRegion(env, ret_arr, 0, slice->datalen, slice->data);
174 JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_bytes_1to_1u8_1vec (JNIEnv * env, jclass _b, jbyteArray bytes) {
175 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)MALLOC(sizeof(LDKCVec_u8Z), "LDKCVec_u8");
176 vec->datalen = (*env)->GetArrayLength(env, bytes);
177 vec->data = (uint8_t*)MALLOC(vec->datalen, "LDKCVec_u8Z Bytes");
178 (*env)->GetByteArrayRegion (env, bytes, 0, vec->datalen, vec->data);
181 JNIEXPORT jbyteArray JNICALL Java_org_ldk_impl_bindings_txpointer_1get_1buffer (JNIEnv * env, jclass _b, jlong ptr) {
182 LDKTransaction *txdata = (LDKTransaction*)ptr;
184 slice.data = txdata->data;
185 slice.datalen = txdata->datalen;
186 return Java_org_ldk_impl_bindings_get_1u8_1slice_1bytes(env, _b, (long)&slice);
188 JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_new_1txpointer_1copy_1data (JNIEnv * env, jclass _b, jbyteArray bytes) {
189 LDKTransaction *txdata = (LDKTransaction*)MALLOC(sizeof(LDKTransaction), "LDKTransaction");
190 txdata->datalen = (*env)->GetArrayLength(env, bytes);
191 txdata->data = (uint8_t*)MALLOC(txdata->datalen, "Tx Data Bytes");
192 txdata->data_is_owned = false;
193 (*env)->GetByteArrayRegion (env, bytes, 0, txdata->datalen, txdata->data);
196 JNIEXPORT void JNICALL Java_org_ldk_impl_bindings_txpointer_1free (JNIEnv * env, jclass _b, jlong ptr) {
197 LDKTransaction *tx = (LDKTransaction*)ptr;
198 tx->data_is_owned = true;
199 Transaction_free(*tx);
202 JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_vec_1slice_1len (JNIEnv * env, jclass _a, jlong ptr) {
203 // Check offsets of a few Vec types are all consistent as we're meant to be generic across types
204 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_SignatureZ, datalen), "Vec<*> needs to be mapped identically");
205 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_MessageSendEventZ, datalen), "Vec<*> needs to be mapped identically");
206 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_EventZ, datalen), "Vec<*> needs to be mapped identically");
207 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKCVec_C2Tuple_usizeTransactionZZ, datalen), "Vec<*> needs to be mapped identically");
208 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)ptr;
209 return (long)vec->datalen;
211 JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_new_1empty_1slice_1vec (JNIEnv * env, jclass _b) {
212 // Check sizes of a few Vec types are all consistent as we're meant to be generic across types
213 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_SignatureZ), "Vec<*> needs to be mapped identically");
214 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_MessageSendEventZ), "Vec<*> needs to be mapped identically");
215 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_EventZ), "Vec<*> needs to be mapped identically");
216 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKCVec_C2Tuple_usizeTransactionZZ), "Vec<*> needs to be mapped identically");
217 LDKCVec_u8Z *vec = (LDKCVec_u8Z*)MALLOC(sizeof(LDKCVec_u8Z), "Empty LDKCVec");
223 // We assume that CVec_u8Z and u8slice are the same size and layout (and thus pointers to the two can be mixed)
224 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKu8slice), "Vec<u8> and [u8] need to have been mapped identically");
225 _Static_assert(offsetof(LDKCVec_u8Z, data) == offsetof(LDKu8slice, data), "Vec<u8> and [u8] need to have been mapped identically");
226 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKu8slice, datalen), "Vec<u8> and [u8] need to have been mapped identically");
228 _Static_assert(sizeof(jlong) == sizeof(int64_t), "We assume that j-types are the same as C types");
229 _Static_assert(sizeof(jbyte) == sizeof(char), "We assume that j-types are the same as C types");
230 _Static_assert(sizeof(void*) <= 8, "Pointers must fit into 64 bits");
232 typedef jlongArray int64_tArray;
233 typedef jbyteArray int8_tArray;
237 self.hu_struct_file_prefix = """package org.ldk.structs;
239 import org.ldk.impl.bindings;
240 import org.ldk.enums.*;
241 import org.ldk.util.*;
242 import java.util.Arrays;
244 @SuppressWarnings("unchecked") // We correctly assign various generic arrays
246 self.c_fn_ty_pfx = "JNIEXPORT "
247 self.c_fn_name_pfx = "JNICALL Java_org_ldk_impl_bindings_"
248 self.c_fn_args_pfx = "JNIEnv *env, jclass clz"
249 self.file_ext = ".java"
250 self.ptr_c_ty = "int64_t"
251 self.ptr_native_ty = "long"
252 self.result_c_ty = "jclass"
253 self.ptr_arr = "jobjectArray"
254 self.get_native_arr_len_call = ("(*env)->GetArrayLength(env, ", ")")
255 self.get_native_arr_ptr_call = ("(*env)->GetPrimitiveArrayCritical(env, ", ", NULL)")
257 def release_native_arr_ptr_call(self, arr_var, arr_ptr_var):
258 return "(*env)->ReleasePrimitiveArrayCritical(env, " + arr_var + ", " + arr_ptr_var + ", 0)"
259 def create_native_arr_call(self, arr_len, ty_info):
260 if ty_info.c_ty == "int8_tArray":
261 return "(*env)->NewByteArray(env, " + arr_len + ")"
263 return "(*env)->New" + ty_info.java_ty.strip("[]").title() + "Array(env, " + arr_len + ")"
264 def set_native_arr_contents(self, arr_name, arr_len, ty_info):
265 if ty_info.c_ty == "int8_tArray":
266 return ("(*env)->SetByteArrayRegion(env, " + arr_name + ", 0, " + arr_len + ", ", ")")
269 def get_native_arr_contents(self, arr_name, dest_name, arr_len, ty_info, copy):
270 if ty_info.c_ty == "int8_tArray":
272 return "(*env)->GetByteArrayRegion(env, " + arr_name + ", 0, " + arr_len + ", " + dest_name + ")"
274 return "(*env)->GetByteArrayElements (env, " + arr_name + ", NULL)"
275 elif not ty_info.java_ty[:len(ty_info.java_ty) - 2].endswith("[]"):
276 return "(*env)->Get" + ty_info.subty.java_ty.title() + "ArrayElements (env, " + arr_name + ", NULL)"
279 def get_native_arr_elem(self, arr_name, idxc, ty_info):
280 if self.get_native_arr_contents(arr_name, "", "", ty_info, False) is None:
281 return "(*env)->GetObjectArrayElement(env, " + arr_name + ", " + idxc + ")"
283 assert False # Only called if above is None
284 def cleanup_native_arr_ref_contents(self, arr_name, dest_name, arr_len, ty_info):
285 if ty_info.c_ty == "int8_tArray":
286 return "(*env)->ReleaseByteArrayElements(env, " + arr_name + ", (int8_t*)" + dest_name + ", 0);"
288 return "(*env)->Release" + ty_info.java_ty.strip("[]").title() + "ArrayElements(env, " + arr_name + ", " + dest_name + ", 0)"
290 def init_str(self, c_array_class_caches):
292 for ty in c_array_class_caches:
293 res = res + "static jclass " + ty + "_clz = NULL;\n"
294 res = res + "JNIEXPORT void Java_org_ldk_impl_bindings_init_1class_1cache(JNIEnv * env, jclass clz) {\n"
295 for ty in c_array_class_caches:
296 res = res + "\t" + ty + "_clz = (*env)->FindClass(env, \"" + ty.replace("arr_of_", "[") + "\");\n"
297 res = res + "\tCHECK(" + ty + "_clz != NULL);\n"
298 res = res + "\t" + ty + "_clz = (*env)->NewGlobalRef(env, " + ty + "_clz);\n"
302 def native_c_unitary_enum_map(self, struct_name, variants):
303 out_java_enum = "package org.ldk.enums;\n\n"
306 out_c = out_c + "static inline " + struct_name + " " + struct_name + "_from_java(" + self.c_fn_args_pfx + ") {\n"
307 out_c = out_c + "\tswitch ((*env)->CallIntMethod(env, clz, ordinal_meth)) {\n"
309 out_java_enum = out_java_enum + "public enum " + struct_name + " {\n"
312 out_java_enum = out_java_enum + "\t" + var + ",\n"
313 out_c = out_c + "\t\tcase %d: return %s;\n" % (ord_v, var)
315 out_java_enum = out_java_enum + "\t; static native void init();\n"
316 out_java_enum = out_java_enum + "\tstatic { init(); }\n"
317 out_java_enum = out_java_enum + "}"
318 out_java = out_java + "\tstatic { " + struct_name + ".values(); /* Force enum statics to run */ }\n"
319 out_c = out_c + "\t}\n"
320 out_c = out_c + "\tabort();\n"
321 out_c = out_c + "}\n"
323 out_c = out_c + "static jclass " + struct_name + "_class = NULL;\n"
325 out_c = out_c + "static jfieldID " + struct_name + "_" + var + " = NULL;\n"
326 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"
327 out_c = out_c + "\t" + struct_name + "_class = (*env)->NewGlobalRef(env, clz);\n"
328 out_c = out_c + "\tCHECK(" + struct_name + "_class != NULL);\n"
330 out_c = out_c + "\t" + struct_name + "_" + var + " = (*env)->GetStaticFieldID(env, " + struct_name + "_class, \"" + var + "\", \"Lorg/ldk/enums/" + struct_name + ";\");\n"
331 out_c = out_c + "\tCHECK(" + struct_name + "_" + var + " != NULL);\n"
332 out_c = out_c + "}\n"
333 out_c = out_c + "static inline jclass " + struct_name + "_to_java(JNIEnv *env, " + struct_name + " val) {\n"
334 out_c = out_c + "\tswitch (val) {\n"
337 out_c = out_c + "\t\tcase " + var + ":\n"
338 out_c = out_c + "\t\t\treturn (*env)->GetStaticObjectField(env, " + struct_name + "_class, " + struct_name + "_" + var + ");\n"
340 out_c = out_c + "\t\tdefault: abort();\n"
341 out_c = out_c + "\t}\n"
342 out_c = out_c + "}\n\n"
344 return (out_c, out_java_enum, out_java)
346 def c_unitary_enum_to_native_call(self, ty_info):
347 return (ty_info.rust_obj + "_to_java(env, ", ")")
348 def native_unitary_enum_to_c_call(self, ty_info):
349 return (ty_info.rust_obj + "_from_java(env, ", ")")
351 def c_complex_enum_pfx(self, struct_name, variants, init_meth_jty_strs):
354 out_c = out_c + "static jclass " + struct_name + "_" + var + "_class = NULL;\n"
355 out_c = out_c + "static jmethodID " + struct_name + "_" + var + "_meth = NULL;\n"
356 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"
357 for var_name in variants:
358 out_c = out_c + "\t" + struct_name + "_" + var_name + "_class =\n"
359 out_c = out_c + "\t\t(*env)->NewGlobalRef(env, (*env)->FindClass(env, \"Lorg/ldk/impl/bindings$" + struct_name + "$" + var_name + ";\"));\n"
360 out_c = out_c + "\tCHECK(" + struct_name + "_" + var_name + "_class != NULL);\n"
361 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"
362 out_c = out_c + "\tCHECK(" + struct_name + "_" + var_name + "_meth != NULL);\n"
363 out_c = out_c + "}\n"
366 def c_complex_enum_pass_ty(self, struct_name):
369 def c_constr_native_complex_enum(self, struct_name, variant, c_params):
370 ret = "(*env)->NewObject(env, " + struct_name + "_" + variant + "_class, " + struct_name + "_" + variant + "_meth"
371 for param in c_params:
372 ret = ret + ", " + param
375 def native_c_map_trait(self, struct_name, field_vars, field_fns):
379 # First generate most of the Java code, note that we need information about java method argument strings for C
380 out_java_trait = out_java_trait + self.hu_struct_file_prefix
381 out_java_trait = out_java_trait + "public class " + struct_name.replace("LDK","") + " extends CommonBase {\n"
382 out_java_trait = out_java_trait + "\tfinal bindings." + struct_name + " bindings_instance;\n"
383 out_java_trait = out_java_trait + "\t" + struct_name.replace("LDK", "") + "(Object _dummy, long ptr) { super(ptr); bindings_instance = null; }\n"
384 out_java_trait = out_java_trait + "\tprivate " + struct_name.replace("LDK", "") + "(bindings." + struct_name + " arg"
385 for var in field_vars:
386 if isinstance(var, ConvInfo):
387 out_java_trait = out_java_trait + ", " + var.java_hu_ty + " " + var.arg_name
389 out_java_trait = out_java_trait + ", bindings." + var[0] + " " + var[1]
390 out_java_trait = out_java_trait + ") {\n"
391 out_java_trait = out_java_trait + "\t\tsuper(bindings." + struct_name + "_new(arg"
392 for var in field_vars:
393 if isinstance(var, ConvInfo):
394 if var.from_hu_conv is not None:
395 out_java_trait = out_java_trait + ", " + var.from_hu_conv[0]
397 out_java_trait = out_java_trait + ", " + var.arg_name
399 out_java_trait = out_java_trait + ", " + var[1]
400 out_java_trait = out_java_trait + "));\n"
401 out_java_trait = out_java_trait + "\t\tthis.ptrs_to.add(arg);\n"
402 for var in field_vars:
403 if isinstance(var, ConvInfo):
404 if var.from_hu_conv is not None and var.from_hu_conv[1] != "":
405 out_java_trait = out_java_trait + "\t\t" + var.from_hu_conv[1] + ";\n"
407 out_java_trait = out_java_trait + "\t\tthis.ptrs_to.add(" + var[1] + ");\n"
408 out_java_trait = out_java_trait + "\t\tthis.bindings_instance = arg;\n"
409 out_java_trait = out_java_trait + "\t}\n"
410 out_java_trait = out_java_trait + "\t@Override @SuppressWarnings(\"deprecation\")\n"
411 out_java_trait = out_java_trait + "\tprotected void finalize() throws Throwable {\n"
412 out_java_trait = out_java_trait + "\t\tif (ptr != 0) { bindings." + struct_name.replace("LDK","") + "_free(ptr); } super.finalize();\n"
413 out_java_trait = out_java_trait + "\t}\n\n"
415 java_trait_constr = "\tprivate static class " + struct_name + "Holder { " + struct_name.replace("LDK", "") + " held; }\n"
416 java_trait_constr = java_trait_constr + "\tpublic static " + struct_name.replace("LDK", "") + " new_impl(" + struct_name.replace("LDK", "") + "Interface arg"
417 for var in field_vars:
418 if isinstance(var, ConvInfo):
419 java_trait_constr = java_trait_constr + ", " + var.java_hu_ty + " " + var.arg_name
421 # Ideally we'd be able to take any instance of the interface, but our C code can only represent
422 # Java-implemented version, so we require users pass a Java implementation here :/
423 java_trait_constr = java_trait_constr + ", " + var[0].replace("LDK", "") + "." + var[0].replace("LDK", "") + "Interface " + var[1] + "_impl"
424 java_trait_constr = java_trait_constr + ") {\n\t\tfinal " + struct_name + "Holder impl_holder = new " + struct_name + "Holder();\n"
425 java_trait_constr = java_trait_constr + "\t\timpl_holder.held = new " + struct_name.replace("LDK", "") + "(new bindings." + struct_name + "() {\n"
426 out_java_trait = out_java_trait + "\tpublic static interface " + struct_name.replace("LDK", "") + "Interface {\n"
427 out_java = out_java + "\tpublic interface " + struct_name + " {\n"
429 for fn_line in field_fns:
430 java_meth_descr = "("
431 if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
432 out_java = out_java + "\t\t " + fn_line.ret_ty_info.java_ty + " " + fn_line.fn_name + "("
433 java_trait_constr = java_trait_constr + "\t\t\t@Override public " + fn_line.ret_ty_info.java_ty + " " + fn_line.fn_name + "("
434 out_java_trait = out_java_trait + "\t\t" + fn_line.ret_ty_info.java_hu_ty + " " + fn_line.fn_name + "("
436 for idx, arg_conv_info in enumerate(fn_line.args_ty):
438 out_java = out_java + ", "
439 java_trait_constr = java_trait_constr + ", "
440 out_java_trait = out_java_trait + ", "
441 out_java = out_java + arg_conv_info.java_ty + " " + arg_conv_info.arg_name
442 out_java_trait = out_java_trait + arg_conv_info.java_hu_ty + " " + arg_conv_info.arg_name
443 java_trait_constr = java_trait_constr + arg_conv_info.java_ty + " " + arg_conv_info.arg_name
444 java_meth_descr = java_meth_descr + arg_conv_info.java_fn_ty_arg
445 java_meth_descr = java_meth_descr + ")" + fn_line.ret_ty_info.java_fn_ty_arg
446 java_meths.append((fn_line.fn_name, java_meth_descr))
448 out_java = out_java + ");\n"
449 out_java_trait = out_java_trait + ");\n"
450 java_trait_constr = java_trait_constr + ") {\n"
452 for arg_info in fn_line.args_ty:
453 if arg_info.to_hu_conv is not None:
454 java_trait_constr = java_trait_constr + "\t\t\t\t" + arg_info.to_hu_conv.replace("\n", "\n\t\t\t\t") + "\n"
456 if fn_line.ret_ty_info.java_ty != "void":
457 java_trait_constr = java_trait_constr + "\t\t\t\t" + fn_line.ret_ty_info.java_hu_ty + " ret = arg." + fn_line.fn_name + "("
459 java_trait_constr = java_trait_constr + "\t\t\t\targ." + fn_line.fn_name + "("
461 for idx, arg_info in enumerate(fn_line.args_ty):
463 java_trait_constr = java_trait_constr + ", "
464 if arg_info.to_hu_conv_name is not None:
465 java_trait_constr = java_trait_constr + arg_info.to_hu_conv_name
467 java_trait_constr = java_trait_constr + arg_info.arg_name
469 java_trait_constr = java_trait_constr + ");\n"
470 if fn_line.ret_ty_info.java_ty != "void":
471 if fn_line.ret_ty_info.from_hu_conv is not None:
472 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"
473 if fn_line.ret_ty_info.from_hu_conv[1] != "":
474 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"
475 #if fn_line.ret_ty_info.rust_obj in result_types:
476 # XXX: We need to handle this in conversion logic so that its cross-language!
477 # Avoid double-free by breaking the result - we should learn to clone these and then we can be safe instead
478 # java_trait_constr = java_trait_constr + "\t\t\t\tret.ptr = 0;\n"
479 java_trait_constr = java_trait_constr + "\t\t\t\treturn result;\n"
481 java_trait_constr = java_trait_constr + "\t\t\t\treturn ret;\n"
482 java_trait_constr = java_trait_constr + "\t\t\t}\n"
483 java_trait_constr = java_trait_constr + "\t\t}"
484 for var in field_vars:
485 if isinstance(var, ConvInfo):
486 java_trait_constr = java_trait_constr + ", " + var.arg_name
488 java_trait_constr = java_trait_constr + ", " + var[1] + ".new_impl(" + var[1] + "_impl).bindings_instance"
489 out_java_trait = out_java_trait + "\t}\n"
490 out_java_trait = out_java_trait + java_trait_constr + ");\n\t\treturn impl_holder.held;\n\t}\n"
492 out_java = out_java + "\t}\n"
494 out_java = out_java + "\tpublic static native long " + struct_name + "_new(" + struct_name + " impl"
495 for var in field_vars:
496 if isinstance(var, ConvInfo):
497 out_java = out_java + ", " + var.java_ty + " " + var.arg_name
499 out_java = out_java + ", " + var[0] + " " + var[1]
500 out_java = out_java + ");\n"
501 out_java = out_java + "\tpublic static native " + struct_name + " " + struct_name + "_get_obj_from_jcalls(long val);\n"
503 # Now that we've written out our java code (and created java_meths), generate C
504 out_c = "typedef struct " + struct_name + "_JCalls {\n"
505 out_c = out_c + "\tatomic_size_t refcnt;\n"
506 out_c = out_c + "\tJavaVM *vm;\n"
507 out_c = out_c + "\tjweak o;\n"
508 for var in field_vars:
509 if isinstance(var, ConvInfo):
510 # We're a regular ol' field
514 out_c = out_c + "\t" + var[0] + "_JCalls* " + var[1] + ";\n"
516 if fn.fn_name != "free" and fn.fn_name != "clone":
517 out_c = out_c + "\tjmethodID " + fn.fn_name + "_meth;\n"
518 out_c = out_c + "} " + struct_name + "_JCalls;\n"
520 for fn_line in field_fns:
521 if fn_line.fn_name == "free":
522 out_c = out_c + "static void " + struct_name + "_JCalls_free(void* this_arg) {\n"
523 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
524 out_c = out_c + "\tif (atomic_fetch_sub_explicit(&j_calls->refcnt, 1, memory_order_acquire) == 1) {\n"
525 out_c = out_c + "\t\tJNIEnv *env;\n"
526 out_c = out_c + "\t\tDO_ASSERT((*j_calls->vm)->GetEnv(j_calls->vm, (void**)&env, JNI_VERSION_1_8) == JNI_OK);\n"
527 out_c = out_c + "\t\t(*env)->DeleteWeakGlobalRef(env, j_calls->o);\n"
528 out_c = out_c + "\t\tFREE(j_calls);\n"
529 out_c = out_c + "\t}\n}\n"
531 for idx, fn_line in enumerate(field_fns):
532 if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
533 assert fn_line.ret_ty_info.ty_info.get_full_rust_ty()[1] == ""
534 out_c = out_c + fn_line.ret_ty_info.ty_info.get_full_rust_ty()[0] + " " + fn_line.fn_name + "_jcall("
535 if fn_line.self_is_const:
536 out_c = out_c + "const void* this_arg"
538 out_c = out_c + "void* this_arg"
540 for idx, arg in enumerate(fn_line.args_ty):
541 out_c = out_c + ", " + arg.ty_info.get_full_rust_ty()[0] + " " + arg.arg_name + arg.ty_info.get_full_rust_ty()[1]
543 out_c = out_c + ") {\n"
544 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
545 out_c = out_c + "\tJNIEnv *env;\n"
546 out_c = out_c + "\tDO_ASSERT((*j_calls->vm)->GetEnv(j_calls->vm, (void**)&env, JNI_VERSION_1_8) == JNI_OK);\n"
548 for arg_info in fn_line.args_ty:
549 if arg_info.ret_conv is not None:
550 out_c = out_c + "\t" + arg_info.ret_conv[0].replace('\n', '\n\t')
551 out_c = out_c + arg_info.arg_name
552 out_c = out_c + arg_info.ret_conv[1].replace('\n', '\n\t') + "\n"
554 out_c = out_c + "\tjobject obj = (*env)->NewLocalRef(env, j_calls->o);\n\tCHECK(obj != NULL);\n"
555 if fn_line.ret_ty_info.c_ty.endswith("Array"):
556 out_c = out_c + "\t" + fn_line.ret_ty_info.c_ty + " arg = (*env)->CallObjectMethod(env, obj, j_calls->" + fn_line.fn_name + "_meth"
557 elif not fn_line.ret_ty_info.passed_as_ptr:
558 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"
560 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"
562 for idx, arg_info in enumerate(fn_line.args_ty):
563 if arg_info.ret_conv is not None:
564 out_c = out_c + ", " + arg_info.ret_conv_name
566 out_c = out_c + ", " + arg_info.arg_name
567 out_c = out_c + ");\n"
568 if fn_line.ret_ty_info.arg_conv is not None:
569 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"
571 out_c = out_c + "}\n"
573 # Write out a clone function whether we need one or not, as we use them in moving to rust
574 out_c = out_c + "static void* " + struct_name + "_JCalls_clone(const void* this_arg) {\n"
575 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
576 out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->refcnt, 1, memory_order_release);\n"
577 for var in field_vars:
578 if not isinstance(var, ConvInfo):
579 out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->" + var[1] + "->refcnt, 1, memory_order_release);\n"
580 out_c = out_c + "\treturn (void*) this_arg;\n"
581 out_c = out_c + "}\n"
583 out_c = out_c + "static inline " + struct_name + " " + struct_name + "_init (" + self.c_fn_args_pfx + ", jobject o"
584 for var in field_vars:
585 if isinstance(var, ConvInfo):
586 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
588 out_c = out_c + ", jobject " + var[1]
589 out_c = out_c + ") {\n"
591 out_c = out_c + "\tjclass c = (*env)->GetObjectClass(env, o);\n"
592 out_c = out_c + "\tCHECK(c != NULL);\n"
593 out_c = out_c + "\t" + struct_name + "_JCalls *calls = MALLOC(sizeof(" + struct_name + "_JCalls), \"" + struct_name + "_JCalls\");\n"
594 out_c = out_c + "\tatomic_init(&calls->refcnt, 1);\n"
595 out_c = out_c + "\tDO_ASSERT((*env)->GetJavaVM(env, &calls->vm) == 0);\n"
596 out_c = out_c + "\tcalls->o = (*env)->NewWeakGlobalRef(env, o);\n"
598 for (fn_name, java_meth_descr) in java_meths:
599 if fn_name != "free" and fn_name != "clone":
600 out_c = out_c + "\tcalls->" + fn_name + "_meth = (*env)->GetMethodID(env, c, \"" + fn_name + "\", \"" + java_meth_descr + "\");\n"
601 out_c = out_c + "\tCHECK(calls->" + fn_name + "_meth != NULL);\n"
603 for var in field_vars:
604 if isinstance(var, ConvInfo) and var.arg_conv is not None:
605 out_c = out_c + "\n\t" + var.arg_conv.replace("\n", "\n\t") +"\n"
606 out_c = out_c + "\n\t" + struct_name + " ret = {\n"
607 out_c = out_c + "\t\t.this_arg = (void*) calls,\n"
608 for fn_line in field_fns:
609 if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
610 out_c = out_c + "\t\t." + fn_line.fn_name + " = " + fn_line.fn_name + "_jcall,\n"
611 elif fn_line.fn_name == "free":
612 out_c = out_c + "\t\t.free = " + struct_name + "_JCalls_free,\n"
614 out_c = out_c + "\t\t.clone = " + struct_name + "_JCalls_clone,\n"
615 for var in field_vars:
616 if isinstance(var, ConvInfo):
617 if var.arg_conv_name is not None:
618 out_c = out_c + "\t\t." + var.arg_name + " = " + var.arg_conv_name + ",\n"
619 out_c = out_c + "\t\t.set_" + var.arg_name + " = NULL,\n"
621 out_c = out_c + "\t\t." + var.var_name + " = " + var.var_name + ",\n"
622 out_c = out_c + "\t\t.set_" + var.var_name + " = NULL,\n"
624 out_c = out_c + "\t\t." + var[1] + " = " + var[0] + "_init(env, clz, " + var[1] + "),\n"
625 out_c = out_c + "\t};\n"
626 for var in field_vars:
627 if not isinstance(var, ConvInfo):
628 out_c = out_c + "\tcalls->" + var[1] + " = ret." + var[1] + ".this_arg;\n"
629 out_c = out_c + "\treturn ret;\n"
630 out_c = out_c + "}\n"
632 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"
633 for var in field_vars:
634 if isinstance(var, ConvInfo):
635 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
637 out_c = out_c + ", jobject " + var[1]
638 out_c = out_c + ") {\n"
639 out_c = out_c + "\t" + struct_name + " *res_ptr = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n"
640 out_c = out_c + "\t*res_ptr = " + struct_name + "_init(env, clz, o"
641 for var in field_vars:
642 if isinstance(var, ConvInfo):
643 out_c = out_c + ", " + var.arg_name
645 out_c = out_c + ", " + var[1]
646 out_c = out_c + ");\n"
647 out_c = out_c + "\treturn (long)res_ptr;\n"
648 out_c = out_c + "}\n"
650 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"
651 out_c = out_c + "\tjobject ret = (*env)->NewLocalRef(env, ((" + struct_name + "_JCalls*)val)->o);\n"
652 out_c = out_c + "\tCHECK(ret != NULL);\n"
653 out_c = out_c + "\treturn ret;\n"
654 out_c = out_c + "}\n"
656 return (out_java, out_java_trait, out_c)
658 def map_complex_enum(self, struct_name, variant_list, camel_to_snake):
659 java_hu_type = struct_name.replace("LDK", "")
664 out_java_enum += (self.hu_struct_file_prefix)
665 out_java_enum += ("public class " + java_hu_type + " extends CommonBase {\n")
666 out_java_enum += ("\tprivate " + java_hu_type + "(Object _dummy, long ptr) { super(ptr); }\n")
667 out_java_enum += ("\t@Override @SuppressWarnings(\"deprecation\")\n")
668 out_java_enum += ("\tprotected void finalize() throws Throwable {\n")
669 out_java_enum += ("\t\tsuper.finalize();\n")
670 out_java_enum += ("\t\tif (ptr != 0) { bindings." + java_hu_type + "_free(ptr); }\n")
671 out_java_enum += ("\t}\n")
672 out_java_enum += ("\tstatic " + java_hu_type + " constr_from_ptr(long ptr) {\n")
673 out_java_enum += ("\t\tbindings." + struct_name + " raw_val = bindings." + struct_name + "_ref_from_ptr(ptr);\n")
674 java_hu_subclasses = ""
676 init_meth_jty_strs = {}
678 out_java += ("\tpublic static class " + struct_name + " {\n")
679 out_java += ("\t\tprivate " + struct_name + "() {}\n")
680 for var in variant_list:
681 out_java += ("\t\tpublic final static class " + var.var_name + " extends " + struct_name + " {\n")
682 java_hu_subclasses = java_hu_subclasses + "\tpublic final static class " + var.var_name + " extends " + java_hu_type + " {\n"
683 out_java_enum += ("\t\tif (raw_val.getClass() == bindings." + struct_name + "." + var.var_name + ".class) {\n")
684 out_java_enum += ("\t\t\treturn new " + var.var_name + "(ptr, (bindings." + struct_name + "." + var.var_name + ")raw_val);\n")
685 init_meth_jty_str = ""
686 init_meth_params = ""
689 for idx, field_ty in enumerate(var.fields):
690 out_java += ("\t\t\tpublic " + field_ty.java_ty + " " + field_ty.arg_name + ";\n")
691 java_hu_subclasses = java_hu_subclasses + "\t\tpublic final " + field_ty.java_hu_ty + " " + field_ty.arg_name + ";\n"
692 if field_ty.to_hu_conv is not None:
693 hu_conv_body = hu_conv_body + "\t\t\t" + field_ty.java_ty + " " + field_ty.arg_name + " = obj." + field_ty.arg_name + ";\n"
694 hu_conv_body = hu_conv_body + "\t\t\t" + field_ty.to_hu_conv.replace("\n", "\n\t\t\t") + "\n"
695 hu_conv_body = hu_conv_body + "\t\t\tthis." + field_ty.arg_name + " = " + field_ty.to_hu_conv_name + ";\n"
697 hu_conv_body = hu_conv_body + "\t\t\tthis." + field_ty.arg_name + " = obj." + field_ty.arg_name + ";\n"
698 init_meth_jty_str = init_meth_jty_str + field_ty.java_fn_ty_arg
700 init_meth_params = init_meth_params + ", "
701 init_meth_params = init_meth_params + field_ty.java_ty + " " + field_ty.arg_name
702 init_meth_body = init_meth_body + "this." + field_ty.arg_name + " = " + field_ty.arg_name + "; "
703 out_java += ("\t\t\t" + var.var_name + "(" + init_meth_params + ") { ")
704 out_java += (init_meth_body)
706 out_java += ("\t\t}\n")
707 out_java_enum += ("\t\t}\n")
708 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"
709 java_hu_subclasses = java_hu_subclasses + hu_conv_body
710 java_hu_subclasses = java_hu_subclasses + "\t\t}\n\t}\n"
711 init_meth_jty_strs[var.var_name] = init_meth_jty_str
712 out_java += ("\t\tstatic native void init();\n")
713 out_java += ("\t}\n")
714 out_java_enum += ("\t\tassert false; return null; // Unreachable without extending the (internal) bindings interface\n\t}\n\n")
715 out_java_enum += (java_hu_subclasses)
716 out_java += ("\tstatic { " + struct_name + ".init(); }\n")
717 out_java += ("\tpublic static native " + struct_name + " " + struct_name + "_ref_from_ptr(long ptr);\n");
719 out_c += (self.c_complex_enum_pfx(struct_name, [x.var_name for x in variant_list], init_meth_jty_strs))
721 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")
722 out_c += ("\t" + struct_name + " *obj = (" + struct_name + "*)ptr;\n")
723 out_c += ("\tswitch(obj->tag) {\n")
724 for var in variant_list:
725 out_c += ("\t\tcase " + struct_name + "_" + var.var_name + ": {\n")
727 for idx, field_map in enumerate(var.fields):
728 if field_map.ret_conv is not None:
729 out_c += ("\t\t\t" + field_map.ret_conv[0].replace("\n", "\n\t\t\t"))
730 out_c += ("obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name)
731 out_c += (field_map.ret_conv[1].replace("\n", "\n\t\t\t") + "\n")
732 c_params.append(field_map.ret_conv_name)
734 c_params.append("obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name)
735 out_c += ("\t\t\treturn " + self.c_constr_native_complex_enum(struct_name, var.var_name, c_params) + ";\n")
737 out_c += ("\t\tdefault: abort();\n")
738 out_c += ("\t}\n}\n")
739 out_java_enum += ("}\n")
740 return (out_java, out_java_enum, out_c)