X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;ds=sidebyside;f=genbindings.py;h=cf033916ee719da00482740e0f8f33fd109f63f1;hb=bf70cb0c3d9b070fa88f96f3e67c836c9e18f759;hp=a867f55830efb77765d54a8ff75b350923c627ac;hpb=75dd8a14a70c7aaacd4c2f0f6b99e0793640874b;p=ldk-java diff --git a/genbindings.py b/genbindings.py index a867f558..cf033916 100755 --- a/genbindings.py +++ b/genbindings.py @@ -5,123 +5,237 @@ if len(sys.argv) != 4: print("USAGE: /path/to/lightning.h /path/to/bindings/output.java /path/to/bindings/output.c") sys.exit(1) +class TypeInfo: + def __init__(self, rust_obj, java_ty, java_fn_ty_arg, c_ty, passed_as_ptr, is_ptr, var_name, arr_len): + self.rust_obj = rust_obj + self.java_ty = java_ty + self.java_fn_ty_arg = java_fn_ty_arg + self.c_ty = c_ty + self.passed_as_ptr = passed_as_ptr + self.is_ptr = is_ptr + self.var_name = var_name + self.arr_len = arr_len + +class ConvInfo: + def __init__(self, ty_info, arg_name, arg_conv, arg_conv_name, ret_conv, ret_conv_name): + assert(ty_info.c_ty is not None) + assert(ty_info.java_ty is not None) + assert(arg_name is not None) + self.c_ty = ty_info.c_ty + self.java_ty = ty_info.java_ty + self.java_fn_ty_arg = ty_info.java_fn_ty_arg + self.arg_name = arg_name + self.arg_conv = arg_conv + self.arg_conv_name = arg_conv_name + self.ret_conv = ret_conv + self.ret_conv_name = ret_conv_name + + def print_ty(self): + out_c.write(self.c_ty) + out_java.write(self.java_ty) + + def print_name(self): + if self.arg_name != "": + out_java.write(" " + self.arg_name) + out_c.write(" " + self.arg_name) + else: + out_java.write(" arg") + out_c.write(" arg") + with open(sys.argv[1]) as in_h, open(sys.argv[2], "w") as out_java, open(sys.argv[3], "w") as out_c: + opaque_structs = set() + trait_structs = set() + var_is_arr_regex = re.compile("\(\*([A-za-z_]*)\)\[([0-9]*)\]") var_ty_regex = re.compile("([A-za-z_0-9]*)(.*)") - def map_type(fn_arg, print_void, ret_arr_len): + def java_c_types(fn_arg, ret_arr_len): fn_arg = fn_arg.strip() if fn_arg.startswith("MUST_USE_RES "): fn_arg = fn_arg[13:] + is_const = False if fn_arg.startswith("const "): fn_arg = fn_arg[6:] + is_const = True - c_ty = None - is_ptr_to_obj = None + is_ptr = False + take_by_ptr = False + rust_obj = None if fn_arg.startswith("void"): - if print_void: - out_java.write("void") - c_ty = "void" - else: - return (None, None, None) - fn_arg = fn_arg.strip("void ") + java_ty = "void" + c_ty = "void" + fn_ty_arg = "V" + fn_arg = fn_arg[4:].strip() elif fn_arg.startswith("bool"): - out_java.write("boolean") + java_ty = "boolean" c_ty = "jboolean" - fn_arg = fn_arg.strip("bool ") + fn_ty_arg = "Z" + fn_arg = fn_arg[4:].strip() elif fn_arg.startswith("uint8_t"): - out_java.write("byte") + java_ty = "byte" c_ty = "jbyte" - fn_arg = fn_arg.strip("uint8_t ") + fn_ty_arg = "B" + fn_arg = fn_arg[7:].strip() + elif fn_arg.startswith("uint16_t"): + java_ty = "short" + c_ty = "jshort" + fn_ty_arg = "S" + fn_arg = fn_arg[8:].strip() elif fn_arg.startswith("uint32_t"): - out_java.write("int") + java_ty = "int" c_ty = "jint" - fn_arg = fn_arg.strip("uint32_t ") + fn_ty_arg = "I" + fn_arg = fn_arg[8:].strip() elif fn_arg.startswith("uint64_t"): - out_java.write("long") + java_ty = "long" c_ty = "jlong" - fn_arg = fn_arg.strip("uint64_t ") + fn_ty_arg = "J" + fn_arg = fn_arg[8:].strip() + elif is_const and fn_arg.startswith("char *"): + java_ty = "String" + c_ty = "const char*" + fn_ty_arg = "Ljava/lang/String;" + fn_arg = fn_arg[6:].strip() else: ma = var_ty_regex.match(fn_arg) - out_java.write("long") - out_c.write("jlong") - is_ptr_to_obj = ma.group(1) - fn_arg = ma.group(2) - if c_ty is not None: - out_c.write(c_ty) + java_ty = "long" + c_ty = "jlong" + fn_ty_arg = "J" + fn_arg = ma.group(2).strip() + rust_obj = ma.group(1).strip() + take_by_ptr = True + + if fn_arg.startswith(" *") or fn_arg.startswith("*"): + fn_arg = fn_arg.replace("*", "").strip() + is_ptr = True + c_ty = "jlong" + java_ty = "long" var_is_arr = var_is_arr_regex.match(fn_arg) - no_ptr = fn_arg.replace('*', '') if var_is_arr is not None or ret_arr_len is not None: - out_java.write("[] ") - out_c.write("Array ") + assert(not take_by_ptr) + assert(not is_ptr) + java_ty = java_ty + "[]" + c_ty = c_ty + "Array" if var_is_arr is not None: - arr_name = var_is_arr.group(1) - arr_len = var_is_arr.group(2) - out_java.write(arr_name) - out_c.write(arr_name) + return TypeInfo(rust_obj=None, java_ty=java_ty, java_fn_ty_arg="[" + fn_ty_arg, c_ty=c_ty, + passed_as_ptr=False, is_ptr=False, var_name=var_is_arr.group(1), arr_len=var_is_arr.group(2)) + return TypeInfo(rust_obj=rust_obj, java_ty=java_ty, java_fn_ty_arg=fn_ty_arg, c_ty=c_ty, passed_as_ptr=is_ptr or take_by_ptr, + is_ptr=is_ptr, var_name=fn_arg, arr_len=None) + + def map_type(fn_arg, print_void, ret_arr_len, is_free): + ty_info = java_c_types(fn_arg, ret_arr_len) + + if ty_info.c_ty == "void": + if not print_void: + return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name, + arg_conv = None, arg_conv_name = None, ret_conv = None, ret_conv_name = None) + + if ty_info.c_ty.endswith("Array"): + arr_len = ty_info.arr_len + if arr_len is not None: + arr_name = ty_info.var_name else: arr_name = "ret" arr_len = ret_arr_len - assert(c_ty == "jbyte") - return ("unsigned char " + arr_name + "_arr[" + arr_len + "];\n" + + assert(ty_info.c_ty == "jbyteArray") + return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name, + arg_conv = "unsigned char " + arr_name + "_arr[" + arr_len + "];\n" + "(*_env)->GetByteArrayRegion (_env, """ + arr_name + ", 0, " + arr_len + ", " + arr_name + "_arr);\n" + "unsigned char (*""" + arr_name + "_ref)[" + arr_len + "] = &" + arr_name + "_arr;", - (c_ty + "Array " + arr_name + "_arr = (*_env)->NewByteArray(_env, 0); // XXX: len 0\n" + + arg_conv_name = arr_name + "_ref", + ret_conv = ("jbyteArray " + arr_name + "_arr = (*_env)->NewByteArray(_env, " + arr_len + ");\n" + "(*_env)->SetByteArrayRegion(_env, " + arr_name + "_arr, 0, " + arr_len + ", *", - ");\nreturn ret_arr;"), - arr_name + "_ref") - elif no_ptr.strip() != "": + ");"), + ret_conv_name = arr_name + "_arr") + elif ty_info.var_name != "": # If we have a parameter name, print it (noting that it may indicate its a pointer) - out_java.write(" " + no_ptr.strip()) - out_c.write(" " + no_ptr.strip()) - if is_ptr_to_obj is not None: - if no_ptr == fn_arg: - return (is_ptr_to_obj + " " + no_ptr.strip() + "_conv = *(" + is_ptr_to_obj + "*)" + no_ptr.strip() + ";", - "XXX2", no_ptr.strip() + "_conv") + if ty_info.rust_obj is not None: + assert(ty_info.passed_as_ptr) + if not ty_info.is_ptr: + if ty_info.rust_obj in trait_structs: + base_conv = ty_info.rust_obj + " *" + ty_info.var_name + "_conv = (" + ty_info.rust_obj + "*)" + ty_info.var_name + ";" + if not is_free: + base_conv = base_conv + "\n" + ty_info.rust_obj + "_JCalls_clone(" + ty_info.var_name + "_conv->this_arg);" + return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name, + arg_conv = base_conv, + arg_conv_name = "*" + ty_info.var_name + "_conv", + ret_conv = None, ret_conv_name = None) + base_conv = ty_info.rust_obj + " " + ty_info.var_name + "_conv = *(" + ty_info.rust_obj + "*)" + ty_info.var_name + ";\nfree((void*)" + ty_info.var_name + ");"; + if ty_info.rust_obj in opaque_structs: + return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name, + arg_conv = base_conv + "\n" + ty_info.var_name + "_conv._underlying_ref = false;", + arg_conv_name = ty_info.var_name + "_conv", + ret_conv = None, ret_conv_name = None) + + return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name, + arg_conv = base_conv, arg_conv_name = ty_info.var_name + "_conv", + ret_conv = None, ret_conv_name = None) else: - return (is_ptr_to_obj + "* " + no_ptr.strip() + "_conv = (" + is_ptr_to_obj + "*)" + no_ptr.strip() + ";", - "XXX2", no_ptr.strip() + "_conv") - elif no_ptr != fn_arg: - return ("YYY1", "XXX3", no_ptr.strip()) + assert(not is_free) + return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name, + arg_conv = ty_info.rust_obj + "* " + ty_info.var_name + "_conv = (" + ty_info.rust_obj + "*)" + ty_info.var_name + ";", + arg_conv_name = ty_info.var_name + "_conv", + ret_conv = None, ret_conv_name = None) + elif ty_info.is_ptr: + return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name, + arg_conv = None, arg_conv_name = ty_info.var_name, ret_conv = None, ret_conv_name = None) + elif ty_info.java_ty == "String": + return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name, + arg_conv = None, arg_conv_name = None, + ret_conv = ("jstring " + ty_info.var_name + "_conv = (*_env)->NewStringUTF(_env, ", ");"), ret_conv_name = ty_info.var_name + "_conv") else: - return (None, "XXX4", no_ptr.strip()) + return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name, + arg_conv = None, arg_conv_name = ty_info.var_name, ret_conv = None, ret_conv_name = None) elif not print_void: # We don't have a parameter name, and want one, just call it arg - out_java.write(" arg") - out_c.write(" arg") - if is_ptr_to_obj is not None: - return (is_ptr_to_obj + " arg_conv = *(" + is_ptr_to_obj + "*)arg;", "XXX2", "arg_conv") + if ty_info.rust_obj is not None: + assert(not is_free or ty_info.rust_obj not in opaque_structs); + return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name, + arg_conv = ty_info.rust_obj + " arg_conv = *(" + ty_info.rust_obj + "*)arg;\nfree((void*)arg);", + arg_conv_name = "arg_conv", + ret_conv = None, ret_conv_name = None) else: - return (None, "XXX6", "arg") + assert(not is_free) + return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name, + arg_conv = None, arg_conv_name = "arg", ret_conv = None, ret_conv_name = None) else: # We don't have a parameter name, and don't want one (cause we're returning) - if is_ptr_to_obj is not None: - if no_ptr == fn_arg: - return (None, (is_ptr_to_obj + "* ret = malloc(sizeof(" + is_ptr_to_obj + "));\n*ret = ", ";\nreturn (long)ret;"), None) + if ty_info.rust_obj is not None: + if not ty_info.is_ptr: + if ty_info.rust_obj in opaque_structs: + # If we're returning a newly-allocated struct, we don't want Rust to ever + # free, instead relying on the Java GC to lose the ref. We undo this in + # any _free function. + # To avoid any issues, we first assert that the incoming object is non-ref. + return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name, + ret_conv = (ty_info.rust_obj + "* ret = malloc(sizeof(" + ty_info.rust_obj + "));\n*ret = ", ";\nassert(!ret->_underlying_ref);\nret->_underlying_ref = true;"), + ret_conv_name = "(long)ret", + arg_conv = None, arg_conv_name = None) + else: + return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name, + ret_conv = (ty_info.rust_obj + "* ret = malloc(sizeof(" + ty_info.rust_obj + "));\n*ret = ", ";"), + ret_conv_name = "(long)ret", + arg_conv = None, arg_conv_name = None) else: - return (None, ("return (long) ", ";"), None) + return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name, + ret_conv = ("long ret = (long)", ";"), ret_conv_name = "ret", + arg_conv = None, arg_conv_name = None) else: - return (None, None, None) - - def map_fn_args(fn_args, f): - for idx, arg in enumerate(fn_args.split(',')): - if idx != 0: - out_java.write(", ") - if arg != "void": - out_c.write(", ") - map_type(arg, False) + return ConvInfo(ty_info = ty_info, arg_name = ty_info.var_name, + arg_conv = None, arg_conv_name = None, ret_conv = None, ret_conv_name = None) def map_fn(re_match, ret_arr_len): out_java.write("\t/// " + line) out_java.write("\tpublic static native ") out_c.write("JNIEXPORT ") - _, ret_conv, _ = map_type(re_match.group(1), True, ret_arr_len) - if ret_conv is not None: - ret_conv_pfx, ret_conv_sfx = ret_conv + ret_info = map_type(re_match.group(1), True, ret_arr_len, False) + ret_info.print_ty() + if ret_info.ret_conv is not None: + ret_conv_pfx, ret_conv_sfx = ret_info.ret_conv out_java.write(" " + re_match.group(2) + "(") - out_c.write(" JNICALL " + re_match.group(2).replace('_', '_1') + "(JNIEnv * _env, jclass _b") + out_c.write(" JNICALL Java_org_ldk_impl_bindings_" + re_match.group(2).replace('_', '_1') + "(JNIEnv * _env, jclass _b") arg_names = [] for idx, arg in enumerate(re_match.group(3).split(',')): @@ -129,34 +243,39 @@ with open(sys.argv[1]) as in_h, open(sys.argv[2], "w") as out_java, open(sys.arg out_java.write(", ") if arg != "void": out_c.write(", ") - arg_names.append(map_type(arg, False, None)) + arg_conv_info = map_type(arg, False, None, re_match.group(2).endswith("_free")) + if arg_conv_info.c_ty != "void": + arg_conv_info.print_ty() + arg_conv_info.print_name() + arg_names.append(arg_conv_info) out_java.write(");\n") out_c.write(") {\n") - for arg_conv, _, _ in arg_names: - if arg_conv is not None: - out_c.write("\t" + arg_conv.replace('\n', "\n\t") + "\n"); + for info in arg_names: + if info.arg_conv is not None: + out_c.write("\t" + info.arg_conv.replace('\n', "\n\t") + "\n"); - if ret_conv is not None: + if ret_info.ret_conv is not None: out_c.write("\t" + ret_conv_pfx.replace('\n', '\n\t')); else: out_c.write("\treturn "); out_c.write(re_match.group(2) + "(") - for idx, (_, _, arg) in enumerate(arg_names): - if arg is not None: + for idx, info in enumerate(arg_names): + if info.arg_conv_name is not None: if idx != 0: out_c.write(", ") - out_c.write(arg) + out_c.write(info.arg_conv_name) out_c.write(")") - if ret_conv is not None: + if ret_info.ret_conv is not None: out_c.write(ret_conv_sfx.replace('\n', '\n\t')) + out_c.write("\n\treturn " + ret_info.ret_conv_name + ";") else: out_c.write(";") out_c.write("\n}\n\n") - out_java.write("""package org.ldk; + out_java.write("""package org.ldk.impl; public class bindings { static { @@ -164,9 +283,19 @@ public class bindings { } """) - out_c.write("#include \"org_ldk_bindings.h\"\n") - out_c.write("#include \n\n") - out_c.write("#include \n\n") + out_c.write("#include \"org_ldk_impl_bindings.h\"\n") + out_c.write("#include \n") + out_c.write("#include \n") + out_c.write("#include \n") + out_c.write("#include \n") + out_c.write("#include \n\n") + + # XXX: Temporarily write out a manual SecretKey_new() for testing, we should auto-gen this kind of thing + out_java.write("\tpublic static native long LDKSecretKey_new();\n\n") # TODO: rm me + out_c.write("JNIEXPORT jlong JNICALL Java_org_ldk_impl_bindings_LDKSecretKey_1new(JNIEnv * _env, jclass _b) {\n") # TODO: rm me + out_c.write("\tLDKSecretKey* key = (LDKSecretKey*)malloc(sizeof(LDKSecretKey));\n") # TODO: rm me + out_c.write("\treturn (long)key;\n") # TODO: rm me + out_c.write("}\n") # TODO: rm me in_block_comment = False in_block_enum = False @@ -178,6 +307,16 @@ public class bindings { reg_fn_regex = re.compile("([A-Za-z_0-9\* ]* \*?)([a-zA-Z_0-9]*)\((.*)\);$") const_val_regex = re.compile("^extern const ([A-Za-z_0-9]*) ([A-Za-z_0-9]*);$") + line_indicates_opaque_regex = re.compile("^ bool _underlying_ref;$") + line_indicates_trait_regex = re.compile("^ ([A-Za-z_0-9]* \*?)\(\*([A-Za-z_0-9]*)\)\((const )?void \*this_arg(.*)\);$") + assert(line_indicates_trait_regex.match(" uintptr_t (*send_data)(void *this_arg, LDKu8slice data, bool resume_read);")) + assert(line_indicates_trait_regex.match(" LDKCVec_MessageSendEventZ (*get_and_clear_pending_msg_events)(const void *this_arg);")) + assert(line_indicates_trait_regex.match(" void *(*clone)(const void *this_arg);")) + line_field_var_regex = re.compile("^ ([A-Za-z_0-9]*) ([A-Za-z_0-9]*);$") + assert(line_field_var_regex.match(" LDKMessageSendEventsProvider MessageSendEventsProvider;")) + struct_name_regex = re.compile("^typedef struct (MUST_USE_STRUCT )?(LDK[A-Za-z_0-9]*) {$") + assert(struct_name_regex.match("typedef struct LDKCVecTempl_u8 {")) + for line in in_h: if in_block_comment: #out_java.write("\t" + line) @@ -187,7 +326,12 @@ public class bindings { cur_block_struct = cur_block_struct + line if line.startswith("} "): field_lines = [] + struct_name = None struct_lines = cur_block_struct.split("\n") + is_opaque = False + trait_fn_lines = [] + field_var_lines = [] + for idx, struct_line in enumerate(struct_lines): if struct_line.strip().startswith("/*"): in_block_comment = True @@ -195,8 +339,150 @@ public class bindings { if struct_line.endswith("*/"): in_block_comment = False else: + struct_name_match = struct_name_regex.match(struct_line) + if struct_name_match is not None: + struct_name = struct_name_match.group(2) + if line_indicates_opaque_regex.match(struct_line): + is_opaque = True + trait_fn_match = line_indicates_trait_regex.match(struct_line) + if trait_fn_match is not None: + trait_fn_lines.append(trait_fn_match) + field_var_match = line_field_var_regex.match(struct_line) + if field_var_match is not None: + field_var_lines.append(field_var_match) field_lines.append(struct_line) - #out_java.write("".join(field_lines) + "\n") + + assert(struct_name is not None) + assert(len(trait_fn_lines) == 0 or not is_opaque) + if is_opaque: + opaque_structs.add(struct_name) + if len(trait_fn_lines) > 0: + trait_structs.add(struct_name) + out_c.write("typedef struct " + struct_name + "_JCalls {\n") + out_c.write("\tatomic_size_t refcnt;\n") + out_c.write("\tJNIEnv *env;\n") + out_c.write("\tjobject o;\n") + for var_line in field_var_lines: + if var_line.group(1) in trait_structs: + out_c.write("\t" + var_line.group(1) + "_JCalls* " + var_line.group(2) + ";\n") + for fn_line in trait_fn_lines: + if fn_line.group(2) != "free" and fn_line.group(2) != "clone": + out_c.write("\tjmethodID " + fn_line.group(2) + "_meth;\n") + out_c.write("} " + struct_name + "_JCalls;\n") + + out_java.write("\tpublic interface " + struct_name + " {\n") + java_meths = [] + for fn_line in trait_fn_lines: + java_meth_descr = "(" + if fn_line.group(2) != "free" and fn_line.group(2) != "clone": + ret_ty_info = java_c_types(fn_line.group(1), None) + + out_java.write("\t\t " + ret_ty_info.java_ty + " " + fn_line.group(2) + "(") + is_const = fn_line.group(3) is not None + out_c.write(fn_line.group(1) + fn_line.group(2) + "_jcall(") + if is_const: + out_c.write("const void* this_arg") + else: + out_c.write("void* this_arg") + + arg_names = [] + for idx, arg in enumerate(fn_line.group(4).split(',')): + if arg == "": + continue + if idx >= 2: + out_java.write(", ") + out_c.write(", ") + arg_conv_info = map_type(arg, True, None, False) + out_c.write(arg.strip()) + out_java.write(arg_conv_info.java_ty + " " + arg_conv_info.arg_name) + arg_names.append(arg_conv_info) + java_meth_descr = java_meth_descr + arg_conv_info.java_fn_ty_arg + java_meth_descr = java_meth_descr + ")" + ret_ty_info.java_fn_ty_arg + java_meths.append(java_meth_descr) + + out_java.write(");\n") + out_c.write(") {\n") + out_c.write("\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n") + + for arg_info in arg_names: + if arg_info.ret_conv is not None: + out_c.write("\t" + arg_info.ret_conv[0].replace('\n', '\n\t').replace("_env", "j_calls->env")); + out_c.write(arg_info.arg_name) + out_c.write(arg_info.ret_conv[1].replace('\n', '\n\t').replace("_env", "j_calls->env") + "\n") + + if not ret_ty_info.passed_as_ptr: + out_c.write("\treturn (*j_calls->env)->Call" + ret_ty_info.java_ty.title() + "Method(j_calls->env, j_calls->o, j_calls->" + fn_line.group(2) + "_meth") + else: + out_c.write("\t" + fn_line.group(1).strip() + "* ret = (" + fn_line.group(1).strip() + "*)(*j_calls->env)->CallLongMethod(j_calls->env, j_calls->o, j_calls->" + fn_line.group(2) + "_meth"); + + for arg_info in arg_names: + if arg_info.ret_conv is not None: + out_c.write(", " + arg_info.ret_conv_name) + else: + out_c.write(", " + arg_info.arg_name) + out_c.write(");\n"); + + if ret_ty_info.passed_as_ptr: + out_c.write("\t" + fn_line.group(1).strip() + " res = *ret;\n") + out_c.write("\tfree(ret);\n") + out_c.write("\treturn res;\n") + out_c.write("}\n") + elif fn_line.group(2) == "free": + out_c.write("void " + struct_name + "_JCalls_free(void* this_arg) {\n") + out_c.write("\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n") + out_c.write("\tif (atomic_fetch_sub_explicit(&j_calls->refcnt, 1, memory_order_acquire) == 1) {\n") + out_c.write("\t\t(*j_calls->env)->DeleteGlobalRef(j_calls->env, j_calls->o);\n") + out_c.write("\t\tfree(j_calls);\n") + out_c.write("\t}\n}\n") + + # Write out a clone function whether we need one or not, as we use them in moving to rust + out_c.write("void* " + struct_name + "_JCalls_clone(const void* this_arg) {\n") + out_c.write("\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n") + out_c.write("\tatomic_fetch_add_explicit(&j_calls->refcnt, 1, memory_order_release);\n") + for var_line in field_var_lines: + if var_line.group(1) in trait_structs: + out_c.write("\tatomic_fetch_add_explicit(&j_calls->" + var_line.group(2) + "->refcnt, 1, memory_order_release);\n") + out_c.write("\treturn (void*) this_arg;\n") + out_c.write("}\n") + + out_java.write("\t}\n") + + out_java.write("\tpublic static native long " + struct_name + "_new(" + struct_name + " impl") + out_c.write("JNIEXPORT long JNICALL Java_org_ldk_impl_bindings_" + struct_name.replace("_", "_1") + "_1new (JNIEnv * env, jclass _a, jobject o") + for var_line in field_var_lines: + if var_line.group(1) in trait_structs: + out_java.write(", " + var_line.group(1) + " " + var_line.group(2)) + out_c.write(", jobject " + var_line.group(2)) + out_java.write(");\n") + out_c.write(") {\n") + + out_c.write("\tjclass c = (*env)->GetObjectClass(env, o);\n") + out_c.write("\tassert(c != NULL);\n") + out_c.write("\t" + struct_name + "_JCalls *calls = malloc(sizeof(" + struct_name + "_JCalls));\n") + out_c.write("\tatomic_init(&calls->refcnt, 1);\n") + out_c.write("\tcalls->env = env;\n") + out_c.write("\tcalls->o = (*env)->NewGlobalRef(env, o);\n") + for (fn_line, java_meth_descr) in zip(trait_fn_lines, java_meths): + if fn_line.group(2) != "free" and fn_line.group(2) != "clone": + out_c.write("\tcalls->" + fn_line.group(2) + "_meth = (*env)->GetMethodID(env, c, \"" + fn_line.group(2) + "\", \"" + java_meth_descr + "\");\n") + out_c.write("\tassert(calls->" + fn_line.group(2) + "_meth != NULL);\n") + out_c.write("\n\t" + struct_name + " *ret = malloc(sizeof(" + struct_name + "));\n") + out_c.write("\tret->this_arg = (void*) calls;\n") + for fn_line in trait_fn_lines: + if fn_line.group(2) != "free" and fn_line.group(2) != "clone": + out_c.write("\tret->" + fn_line.group(2) + " = " + fn_line.group(2) + "_jcall;\n") + elif fn_line.group(2) == "free": + out_c.write("\tret->free = " + struct_name + "_JCalls_free;\n") + else: + out_c.write("\tret->clone = " + struct_name + "_JCalls_clone;\n") + for var_line in field_var_lines: + if var_line.group(1) in trait_structs: + out_c.write("\tret->" + var_line.group(2) + " = *(" + var_line.group(1) + "*)Java_org_ldk_impl_bindings_" + var_line.group(1) + "_1new(env, _a, " + var_line.group(2) + ");\n") + out_c.write("\tcalls->" + var_line.group(2) + " = ret->" + var_line.group(2) + ".this_arg;\n") + out_c.write("\treturn (long)ret;\n") + out_c.write("}\n\n") + + #out_java.write("/* " + "\n".join(field_lines) + "*/\n") cur_block_struct = None elif in_block_union: if line.startswith("} "):