From: Matt Corallo Date: Tue, 7 Nov 2023 18:30:10 +0000 (+0000) Subject: [C#] Rewrite trait impl based on typescript, not Java X-Git-Tag: v0.0.118.0-alpha0~11 X-Git-Url: http://git.bitcoin.ninja/index.cgi?p=ldk-java;a=commitdiff_plain;h=3cc0a74cece1ef4dd8c816add1172fbbf719da23 [C#] Rewrite trait impl based on typescript, not Java C# doesn't let us pass arbitrary C# objects over the FFI as a pointer, at least not easily, so instead we need something that looks much more like what we do for TypeScript. Here we rewrite the trait handling in C# based on the TypeScript code and instead store weak pointers so we can reference trait implementation instances by a single `long`. --- diff --git a/csharp_strings.py b/csharp_strings.py index 51cdaa97..c87bef6d 100644 --- a/csharp_strings.py +++ b/csharp_strings.py @@ -16,9 +16,12 @@ def arg_name_repl(s, arg_name): return s.replace(arg_name, "_" + arg_name) if arg_name == "lock" or arg_name == "event" or arg_name == "params" else s class Consts: - def __init__(self, DEBUG: bool, target: Target, **kwargs): + def __init__(self, DEBUG: bool, target: Target, outdir: str, **kwargs): + self.outdir = outdir self.target = target self.c_array_class_caches = set() + self.function_ptr_counter = 0 + self.function_ptrs = {} self.c_type_map = dict( bool = ['bool'], uint8_t = ['byte'], @@ -44,14 +47,15 @@ class Consts: using org.ldk.enums; using org.ldk.impl; using System; +using System.Collections.Generic; using System.Runtime.InteropServices; namespace org { namespace ldk { namespace impl { internal class bindings { + static List js_objs = new List(); internal class ArrayCoder : ICustomMarshaler { int size = 0; - GCHandle pinnedArray; public static ICustomMarshaler GetInstance(string pstrCookie) { return new ArrayCoder(); } @@ -420,6 +424,8 @@ static inline LDKStr str_ref_to_owned_c(const jstring str) { return res; } +typedef bool jboolean; + jstring CS_LDK_get_ldk_c_bindings_version() { return str_ref_to_cs(check_get_ldk_bindings_version(), strlen(check_get_ldk_bindings_version())); } @@ -457,7 +463,7 @@ namespace org { namespace ldk { namespace structs { self.bindings_footer_wip = "\tstatic bindings() {\n" def bindings_footer(self): - return self.bindings_footer_wip + "\t}\n}\n} } }\n" + return "" def native_meth_decl(self, meth_name, ret_ty_str): return "\t[DllImport (\"ldkcsharp\", EntryPoint=\"CS_LDK_" + meth_name + "\")] public static extern " + ret_ty_str + " " + meth_name @@ -522,7 +528,20 @@ namespace org { namespace ldk { namespace structs { return None def init_str(self): - return "" + ret = "" + for fn_suffix in self.function_ptrs: + cret = self.function_ptrs[fn_suffix]["ret"][1] + cargs = self.function_ptrs[fn_suffix]["args"][1] + ret += f""" +typedef {cret} (*invoker_{fn_suffix})(int obj_ptr, int fn_id{cargs}); +static invoker_{fn_suffix} js_invoke_function_{fn_suffix}; +int CS_LDK_register_{fn_suffix}_invoker(invoker_{fn_suffix} invoker) {{ + js_invoke_function_{fn_suffix} = invoker; + return 0; +}} +""" + + return ret def var_decl_statement(self, ty_string, var_name, statement): return ty_string + " " + var_name + " = " + statement @@ -642,89 +661,69 @@ namespace org { namespace ldk { namespace structs { ret = ret + ", " + param return ret + ")" - def native_c_map_trait(self, struct_name, field_vars, flattened_field_vars, field_fns, trait_doc_comment): - out_java_trait = "" - out_java = "" - - # First generate most of the Java code, note that we need information about java method argument strings for C - out_java_trait += self.hu_struct_file_prefix - if trait_doc_comment is not None: - out_java_trait += "/**\n * " + trait_doc_comment.replace("\n", "\n * ") + "\n */\n" - out_java_trait = out_java_trait + "public class " + struct_name.replace("LDK","") + " : CommonBase {\n" - out_java_trait = out_java_trait + "\tinternal readonly bindings." + struct_name + " bindings_instance;\n" - out_java_trait = out_java_trait + "\tinternal " + struct_name.replace("LDK", "") + "(object _dummy, long ptr) : base(ptr) { bindings_instance = null; }\n" - out_java_trait = out_java_trait + "\tprivate " + struct_name.replace("LDK", "") + "(bindings." + struct_name + " arg" - for var in flattened_field_vars: - if isinstance(var, ConvInfo): - out_java_trait += ", " + var.java_hu_ty + " " + var.arg_name - else: - out_java_trait += ", bindings." + var[0] + " " + var[1] - out_java_trait += ") : base(bindings." + struct_name + "_new(arg" - for var in flattened_field_vars: + def native_c_map_trait(self, struct_name, field_var_conversions, flattened_field_var_conversions, field_function_lines, trait_doc_comment): + out_typescript_bindings = "" + super_instantiator = "" + bindings_instantiator = "" + pointer_to_adder = "" + impl_constructor_arguments = "" + for var in flattened_field_var_conversions: if isinstance(var, ConvInfo): + impl_constructor_arguments += f", {var.java_hu_ty} {var.arg_name}" if var.from_hu_conv is not None: - out_java_trait = out_java_trait + ", " + var.from_hu_conv[0] + bindings_instantiator += ", " + var.from_hu_conv[0] + if var.from_hu_conv[1] != "": + pointer_to_adder += "\t\t\t" + var.from_hu_conv[1] + ";\n" else: - out_java_trait = out_java_trait + ", " + var.arg_name + bindings_instantiator += ", " + first_to_lower(var.arg_name) else: - out_java_trait = out_java_trait + ", " + var[1] - out_java_trait = out_java_trait + ")) {\n" - out_java_trait = out_java_trait + "\t\tthis.ptrs_to.AddLast(arg);\n" - for var in flattened_field_vars: + bindings_instantiator += ", " + first_to_lower(var[1]) + ".instance_idx" + pointer_to_adder += "\t\timpl_holder.held.ptrs_to.AddLast(" + first_to_lower(var[1]) + ");\n" + impl_constructor_arguments += f", {var[0].replace('LDK', '')}Interface {first_to_lower(var[1])}_impl" + + super_constructor_statements = "" + trait_constructor_arguments = "" + for var in field_var_conversions: if isinstance(var, ConvInfo): - if var.from_hu_conv is not None and var.from_hu_conv[1] != "": - out_java_trait = out_java_trait + "\t\t" + var.from_hu_conv[1].replace("\n", "\n\t\t") + ";\n" + trait_constructor_arguments += ", " + var.arg_name else: - out_java_trait = out_java_trait + "\t\tthis.ptrs_to.AddLast(" + var[1] + ");\n" - out_java_trait = out_java_trait + "\t\tthis.bindings_instance = arg;\n" - out_java_trait = out_java_trait + "\t}\n" - out_java_trait = out_java_trait + "\t~" + struct_name.replace("LDK","") + "() {\n" - out_java_trait = out_java_trait + "\t\tif (ptr != 0) { bindings." + struct_name.replace("LDK","") + "_free(ptr); }\n" - out_java_trait = out_java_trait + "\t}\n\n" + super_constructor_statements += "\t\t" + var[1] + " " + first_to_lower(var[1]) + " = " + var[1] + ".new_impl(" + first_to_lower(var[1]) + "_impl" + super_instantiator = "" + for suparg in var[2]: + if isinstance(suparg, ConvInfo): + super_instantiator += ", " + suparg.arg_name + else: + super_instantiator += ", " + first_to_lower(suparg[1]) + "_impl" + super_constructor_statements += super_instantiator + ");\n" + trait_constructor_arguments += ", " + first_to_lower(var[1]) + ".instance_idx" + for suparg in var[2]: + if isinstance(suparg, ConvInfo): + trait_constructor_arguments += ", " + suparg.arg_name + else: + # Blindly assume that we can just strip the first arg to build the args for the supertrait + super_constructor_statements += "\t\t" + suparg[1] + " " + first_to_lower(suparg[1]) + " = " + suparg[1] + ".new_impl(" + super_instantiator.split(", ", 1)[1] + ");\n" + trait_constructor_arguments += ", " + suparg[1] + + # BUILD INTERFACE METHODS java_trait_wrapper = "\tprivate class " + struct_name + "Holder { internal " + struct_name.replace("LDK", "") + " held; }\n" java_trait_wrapper += "\tprivate class " + struct_name + "Impl : bindings." + struct_name + " {\n" java_trait_wrapper += "\t\tinternal " + struct_name + "Impl(" + struct_name.replace("LDK", "") + "Interface arg, " + struct_name + "Holder impl_holder) { this.arg = arg; this.impl_holder = impl_holder; }\n" java_trait_wrapper += "\t\tprivate " + struct_name.replace("LDK", "") + "Interface arg;\n" java_trait_wrapper += "\t\tprivate " + struct_name + "Holder impl_holder;\n" - java_trait_constr = "\tpublic static " + struct_name.replace("LDK", "") + " new_impl(" + struct_name.replace("LDK", "") + "Interface arg" - for var in flattened_field_vars: - if isinstance(var, ConvInfo): - java_trait_constr += ", " + var.java_hu_ty + " " + var.arg_name - else: - # Ideally we'd be able to take any instance of the interface, but our C code can only represent - # Java-implemented version, so we require users pass a Java implementation here :/ - java_trait_constr += ", " + var[0].replace("LDK", "") + "." + var[0].replace("LDK", "") + "Interface " + var[1] + "_impl" - java_trait_constr = java_trait_constr + ") {\n\t\t" + struct_name + "Holder impl_holder = new " + struct_name + "Holder();\n" - java_trait_constr = java_trait_constr + "\t\timpl_holder.held = new " + struct_name.replace("LDK", "") + "(new " + struct_name + "Impl(arg, impl_holder)" - out_java_trait += "\tpublic interface " + struct_name.replace("LDK", "") + "Interface {\n" - out_java += "\tpublic interface " + struct_name + " {\n" - java_meths = [] - for fn_line in field_fns: - java_meth_descr = "(" + + for fn_line in field_function_lines: if fn_line.fn_name != "free" and fn_line.fn_name != "cloned": fn_name = fn_line.fn_name if fn_name == "lock": # reserved symbol fn_name = "do_lock" - out_java += "\t\t" + fn_line.ret_ty_info.java_ty + " " + fn_name + "(" java_trait_wrapper += "\t\tpublic " + fn_line.ret_ty_info.java_ty + " " + fn_name + "(" - out_java_trait += "\t\t/**\n\t\t * " + fn_line.docs.replace("\n", "\n\t\t * ") + "\n\t\t */\n" - out_java_trait += "\t\t" + fn_line.ret_ty_info.java_hu_ty + " " + fn_name + "(" for idx, arg_conv_info in enumerate(fn_line.args_ty): if idx >= 1: - out_java += ", " java_trait_wrapper += ", " - out_java_trait += ", " - out_java += arg_conv_info.java_ty + " _" + arg_conv_info.arg_name - out_java_trait += arg_conv_info.java_hu_ty + " _" + arg_conv_info.arg_name java_trait_wrapper += arg_conv_info.java_ty + " _" + arg_conv_info.arg_name - java_meth_descr = java_meth_descr + arg_conv_info.java_fn_ty_arg - java_meth_descr = java_meth_descr + ")" + fn_line.ret_ty_info.java_fn_ty_arg - java_meths.append((fn_line.fn_name, java_meth_descr)) - out_java += ");\n" - out_java_trait += ");\n" java_trait_wrapper += ") {\n" for arg_info in fn_line.args_ty: @@ -756,66 +755,133 @@ namespace org { namespace ldk { namespace structs { java_trait_wrapper += "\t\t\treturn ret;\n" java_trait_wrapper += "\t\t}\n" java_trait_wrapper += "\t}" - for var in field_vars: - if isinstance(var, ConvInfo): - java_trait_constr = java_trait_constr + ", " + var.arg_name - else: - java_trait_constr += ", " + var[1] + ".new_impl(" + var[1] + "_impl" - suptrait_constr = "" - for suparg in var[2]: - if isinstance(suparg, ConvInfo): - suptrait_constr += ", " + suparg.arg_name - else: - suptrait_constr += ", " + suparg[1] + "_impl" - java_trait_constr += suptrait_constr + ").bindings_instance" - for suparg in var[2]: - if isinstance(suparg, ConvInfo): - java_trait_constr += ", " + suparg.arg_name - else: - java_trait_constr += ", " + suparg[1] + ".new_impl(" - # Blindly assume that we can just strip the first arg to build the args for the supertrait - java_trait_constr += suptrait_constr.split(", ", 1)[1] - java_trait_constr += ").bindings_instance" - out_java_trait += "\t}\n" + java_trait_wrapper + "\n" - out_java_trait += java_trait_constr + ");\n\t\treturn impl_holder.held;\n\t}\n" - out_java += "\t}\n" + out_java_interface = "" + java_methods = [] + for fn_line in field_function_lines: + java_method_descriptor = "" + if fn_line.fn_name != "free" and fn_line.fn_name != "cloned": + out_java_interface += "\t/**" + fn_line.docs.replace("\n", "\n\t * ") + "\n\t */\n" + out_java_interface += "\t" + fn_line.ret_ty_info.java_hu_ty + " " + fn_line.fn_name + "(" - out_java += self.native_meth_decl(struct_name + "_new", "long") + "(" + struct_name + " impl" - for var in flattened_field_vars: + for idx, arg_conv_info in enumerate(fn_line.args_ty): + if idx >= 1: + out_java_interface += ", " + out_java_interface += f"{arg_conv_info.java_hu_ty} {safe_arg_name(arg_conv_info.arg_name)}" + java_method_descriptor += arg_conv_info.java_fn_ty_arg + out_java_interface += f");\n" + java_method_descriptor += ")" + fn_line.ret_ty_info.java_fn_ty_arg + java_methods.append((fn_line.fn_name, java_method_descriptor)) + + formatted_trait_docs = trait_doc_comment.replace("\n", "\n * ") + out_typescript_human = f""" +{self.hu_struct_file_prefix} + +/** An implementation of {struct_name.replace("LDK","")} */ +public interface {struct_name.replace("LDK", "")}Interface {{ +{out_java_interface}}} + +/** + * {formatted_trait_docs} + */ +public class {struct_name.replace("LDK","")} : CommonBase {{ + internal bindings.{struct_name} bindings_instance; + internal long instance_idx; + + internal {struct_name.replace("LDK","")}(object _dummy, long ptr) : base(ptr) {{ bindings_instance = null; }} + ~{struct_name.replace("LDK","")}() {{ + if (ptr != 0) {{ bindings.{struct_name.replace("LDK","")}_free(ptr); }} + }} + +{java_trait_wrapper} + + /** Creates a new instance of {struct_name.replace("LDK","")} from a given implementation */ + public static {struct_name.replace("LDK", "")} new_impl({struct_name.replace("LDK", "")}Interface arg{impl_constructor_arguments}) {{ + {struct_name}Holder impl_holder = new {struct_name}Holder(); + {struct_name}Impl impl = new {struct_name}Impl(arg, impl_holder); +{super_constructor_statements} long[] ptr_idx = bindings.{struct_name}_new(impl{bindings_instantiator}); + + impl_holder.held = new {struct_name.replace("LDK", "")}(null, ptr_idx[0]); + impl_holder.held.instance_idx = ptr_idx[1]; + impl_holder.held.bindings_instance = impl; +{pointer_to_adder} return impl_holder.held; + }} + +""" + + out_typescript_bindings += "\tpublic interface " + struct_name + " {\n" + java_meths = [] + for fn_line in field_function_lines: + if fn_line.fn_name != "free" and fn_line.fn_name != "cloned": + out_typescript_bindings += f"\t\t{fn_line.ret_ty_info.java_ty} {fn_line.fn_name}(" + + for idx, arg_conv_info in enumerate(fn_line.args_ty): + if idx >= 1: + out_typescript_bindings = out_typescript_bindings + ", " + out_typescript_bindings += f"{arg_conv_info.java_ty} {safe_arg_name(arg_conv_info.arg_name)}" + + out_typescript_bindings += f");\n" + + out_typescript_bindings += "\t}\n" + + c_call_extra_args = "" + native_fn_args = "long impl_idx" + for var in flattened_field_var_conversions: if isinstance(var, ConvInfo): - out_java += ", " + var.java_ty + " " + var.arg_name + native_fn_args += ", " + var.java_ty + " " + var.arg_name else: - out_java += ", " + var[0] + " " + var[1] - out_java += ");\n" + native_fn_args += ", long " + var[1] + out_typescript_bindings += self.native_meth_decl(struct_name + "_new", "long") + "_native(" + native_fn_args + ");\n" + out_typescript_bindings += f"\tpublic static long[] {struct_name}_new({struct_name} impl" + for var in flattened_field_var_conversions: + if isinstance(var, ConvInfo): + out_typescript_bindings += f", {var.java_ty} {var.arg_name}" + c_call_extra_args += f", {var.arg_name}" + else: + out_typescript_bindings += f", long {var[1]}" + c_call_extra_args += f", {var[1]}" + + + out_typescript_bindings += f""") {{ + long new_obj_idx = js_objs.Count; + int i = 0; + for (; i < js_objs.Count; i++) {{ + if (js_objs[i] == null || !js_objs[i].IsAlive) {{ new_obj_idx = i; break; }} + }} + if (i == js_objs.Count) {{ + js_objs.Add(new WeakReference(impl)); + }} else {{ + js_objs[i] = new WeakReference(impl); + }} + long[] ret = new long[2]; + ret[0] = {struct_name}_new_native(i{c_call_extra_args}); + ret[1] = i; + return ret; + }} +""" # Now that we've written out our java code (and created java_meths), generate C out_c = "typedef struct " + struct_name + "_JCalls {\n" - out_c = out_c + "\tatomic_size_t refcnt;\n" - out_c = out_c + "\tJavaVM *vm;\n" - out_c = out_c + "\tjweak o;\n" - for var in flattened_field_vars: + out_c += "\tatomic_size_t refcnt;\n" + out_c += "\tuint32_t instance_ptr;\n" + for var in flattened_field_var_conversions: if isinstance(var, ConvInfo): # We're a regular ol' field pass else: # We're a supertrait out_c = out_c + "\t" + var[0] + "_JCalls* " + var[1] + ";\n" - for fn in field_fns: - if fn.fn_name != "free" and fn.fn_name != "cloned": - out_c = out_c + "\tjmethodID " + fn.fn_name + "_meth;\n" out_c = out_c + "} " + struct_name + "_JCalls;\n" - for fn_line in field_fns: + for fn_line in field_function_lines: if fn_line.fn_name == "free": out_c = out_c + "static void " + struct_name + "_JCalls_free(void* this_arg) {\n" out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n" out_c = out_c + "\tif (atomic_fetch_sub_explicit(&j_calls->refcnt, 1, memory_order_acquire) == 1) {\n" - out_c = out_c + "\t\t(*env)->DeleteWeakGlobalRef(env, j_calls->o);\n" out_c = out_c + "\t\tFREE(j_calls);\n" out_c = out_c + "\t}\n}\n" - for idx, fn_line in enumerate(field_fns): + for idx, fn_line in enumerate(field_function_lines): if fn_line.fn_name != "free" and fn_line.fn_name != "cloned": assert fn_line.ret_ty_info.ty_info.get_full_rust_ty()[1] == "" out_c = out_c + fn_line.ret_ty_info.ty_info.get_full_rust_ty()[0] + " " + fn_line.fn_name + "_" + struct_name + "_jcall(" @@ -836,87 +902,92 @@ namespace org { namespace ldk { namespace structs { out_c = out_c + arg_info.arg_name out_c = out_c + arg_info.ret_conv[1].replace('\n', '\n\t') + "\n" - out_c = out_c + "\tjobject obj = (*env)->NewLocalRef(env, j_calls->o);\n\tCHECK(obj != NULL);\n" + ty_to_c = lambda jty, ty: "b" if jty == "bool" else "c" if jty == "char" else "s" if jty == "short" else "i" if jty == "int" else "l" if jty == "long" else "void" if jty == "void" else jty + + fn_java_callback_args = "" + fn_c_callback_args = "" + fn_callback_call_args = "" + fn_suffix = ty_to_c(fn_line.ret_ty_info.java_ty, fn_line.ret_ty_info) + "_" + idx = 0 + for arg_info in fn_line.args_ty: + fn_suffix += ty_to_c(arg_info.java_ty, arg_info) + fn_java_callback_args += ", " + arg_info.java_ty + " " + chr(ord("a") + idx) + fn_c_callback_args += ", " + arg_info.c_ty + " " + chr(ord("a") + idx) + if idx != 0: + fn_callback_call_args += ", " + fn_callback_call_args += chr(ord("a") + idx) + idx += 1 if fn_line.ret_ty_info.c_ty.endswith("Array"): - out_c = out_c + "\t" + fn_line.ret_ty_info.c_ty + " ret = (*env)->CallObjectMethod(env, obj, j_calls->" + fn_line.fn_name + "_meth" - elif fn_line.ret_ty_info.c_ty == "void": - out_c += "\t(*env)->CallVoidMethod(env, obj, j_calls->" + fn_line.fn_name + "_meth" - elif fn_line.ret_ty_info.java_hu_ty == "string" or "org/ldk/enums" in fn_line.ret_ty_info.java_fn_ty_arg: - # Manually write out string methods as they're just an Object - out_c += "\t" + fn_line.ret_ty_info.c_ty + " ret = (*env)->CallObjectMethod(env, obj, j_calls->" + fn_line.fn_name + "_meth" - elif not fn_line.ret_ty_info.passed_as_ptr: - out_c += "\t" + fn_line.ret_ty_info.c_ty + " ret = (*env)->Call" + fn_line.ret_ty_info.java_ty.title() + "Method(env, obj, j_calls->" + fn_line.fn_name + "_meth" + out_c += "\t" + fn_line.ret_ty_info.c_ty + " ret = (" + fn_line.ret_ty_info.c_ty + ")" + out_c += "js_invoke_function_" + fn_suffix + "(j_calls->instance_ptr, " + str(self.function_ptr_counter) + elif fn_line.ret_ty_info.java_ty == "void": + out_c = out_c + "\tjs_invoke_function_" + fn_suffix + "(j_calls->instance_ptr, " + str(self.function_ptr_counter) + elif fn_line.ret_ty_info.java_hu_ty == "string": + out_c += "\tjstring ret = (jstring)js_invoke_function_" + fn_suffix + "(j_calls->instance_ptr, " + str(self.function_ptr_counter) + elif fn_line.ret_ty_info.arg_conv is None: + out_c += "\treturn js_invoke_function_" + fn_suffix + "(j_calls->instance_ptr, " + str(self.function_ptr_counter) else: - out_c = out_c + "\tuint64_t ret = (*env)->CallLongMethod(env, obj, j_calls->" + fn_line.fn_name + "_meth" + out_c += "\tuint64_t ret = js_invoke_function_" + fn_suffix + "(j_calls->instance_ptr, " + str(self.function_ptr_counter) + + if fn_suffix not in self.function_ptrs: + self.function_ptrs[fn_suffix] = {"args": [fn_java_callback_args, fn_c_callback_args], "ret": [fn_line.ret_ty_info.java_ty, fn_line.ret_ty_info.c_ty]} + self.function_ptrs[fn_suffix][self.function_ptr_counter] = (struct_name, fn_line.fn_name, fn_callback_call_args) + self.function_ptr_counter += 1 for idx, arg_info in enumerate(fn_line.args_ty): if arg_info.ret_conv is not None: - out_c = out_c + ", " + arg_info.ret_conv_name + if arg_info.c_ty.endswith("Array"): + out_c += ", (int64_t)" + arg_info.ret_conv_name + else: + out_c += ", " + arg_info.ret_conv_name else: - out_c = out_c + ", " + arg_info.arg_name + assert False # TODO: Would we need some conversion here? + out_c += ", (int64_t)" + arg_info.arg_name out_c = out_c + ");\n" - - out_c += "\tif (UNLIKELY((*env)->ExceptionCheck(env))) {\n" - out_c += "\t\t(*env)->ExceptionDescribe(env);\n" - out_c += "\t\t(*env)->FatalError(env, \"A call to " + fn_line.fn_name + " in " + struct_name + " from rust threw an exception.\");\n" - out_c += "\t}\n" - if fn_line.ret_ty_info.arg_conv is not None: - out_c += "\t" + fn_line.ret_ty_info.arg_conv.replace("\n", "\n\t") + "\n" - out_c += "\treturn " + fn_line.ret_ty_info.arg_conv_name + ";\n" - else: - if not fn_line.ret_ty_info.passed_as_ptr and fn_line.ret_ty_info.c_ty != "void": - out_c += "\treturn ret;\n" + 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" out_c = out_c + "}\n" - # If we can, write out a clone function whether we need one or not, as we use them in moving to rust - can_clone_with_ptr = True - for var in field_vars: - if isinstance(var, ConvInfo): - can_clone_with_ptr = False - if can_clone_with_ptr: - out_c = out_c + "static void " + struct_name + "_JCalls_cloned(" + struct_name + "* new_obj) {\n" - out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) new_obj->this_arg;\n" - out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->refcnt, 1, memory_order_release);\n" - for var in field_vars: - if not isinstance(var, ConvInfo): - out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->" + var[1] + "->refcnt, 1, memory_order_release);\n" - out_c = out_c + "}\n" - - out_c = out_c + "static inline " + struct_name + " " + struct_name + "_init (" + self.c_fn_args_pfx + ", jobject o" - for var in flattened_field_vars: + # Write out a clone function whether we need one or not, as we use them in moving to rust + out_c = out_c + "static void " + struct_name + "_JCalls_cloned(" + struct_name + "* new_obj) {\n" + out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) new_obj->this_arg;\n" + out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->refcnt, 1, memory_order_release);\n" + for var in flattened_field_var_conversions: + if not isinstance(var, ConvInfo): + out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->" + var[2].replace(".", "->") + "->refcnt, 1, memory_order_release);\n" + out_c = out_c + "}\n" + + out_c = out_c + "static inline " + struct_name + " " + struct_name + "_init (int64_t o" + for var in flattened_field_var_conversions: if isinstance(var, ConvInfo): out_c = out_c + ", " + var.c_ty + " " + var.arg_name else: - out_c = out_c + ", jobject " + var[1] + out_c = out_c + ", int64_t " + var[1] out_c = out_c + ") {\n" - out_c = out_c + "\tjclass c = (*env)->GetObjectClass(env, o);\n" - out_c = out_c + "\tCHECK(c != NULL);\n" out_c = out_c + "\t" + struct_name + "_JCalls *calls = MALLOC(sizeof(" + struct_name + "_JCalls), \"" + struct_name + "_JCalls\");\n" out_c = out_c + "\tatomic_init(&calls->refcnt, 1);\n" - out_c = out_c + "\tDO_ASSERT((*env)->GetJavaVM(env, &calls->vm) == 0);\n" - out_c = out_c + "\tcalls->o = (*env)->NewWeakGlobalRef(env, o);\n" + out_c = out_c + "\tcalls->instance_ptr = o;\n" for (fn_name, java_meth_descr) in java_meths: if fn_name != "free" and fn_name != "cloned": out_c = out_c + "\tcalls->" + fn_name + "_meth = (*env)->GetMethodID(env, c, \"" + fn_name + "\", \"" + java_meth_descr + "\");\n" out_c = out_c + "\tCHECK(calls->" + fn_name + "_meth != NULL);\n" - for var in flattened_field_vars: + for var in flattened_field_var_conversions: if isinstance(var, ConvInfo) and var.arg_conv is not None: out_c = out_c + "\n\t" + var.arg_conv.replace("\n", "\n\t") +"\n" out_c = out_c + "\n\t" + struct_name + " ret = {\n" out_c = out_c + "\t\t.this_arg = (void*) calls,\n" - for fn_line in field_fns: + for fn_line in field_function_lines: if fn_line.fn_name != "free" and fn_line.fn_name != "cloned": out_c = out_c + "\t\t." + fn_line.fn_name + " = " + fn_line.fn_name + "_" + struct_name + "_jcall,\n" elif fn_line.fn_name == "free": out_c = out_c + "\t\t.free = " + struct_name + "_JCalls_free,\n" else: out_c = out_c + "\t\t.cloned = " + struct_name + "_JCalls_cloned,\n" - for var in field_vars: + for var in field_var_conversions: if isinstance(var, ConvInfo): if var.arg_conv_name is not None: out_c = out_c + "\t\t." + var.arg_name + " = " + var.arg_conv_name + ",\n" @@ -925,30 +996,30 @@ namespace org { namespace ldk { namespace structs { out_c = out_c + "\t\t." + var.var_name + " = " + var.var_name + ",\n" out_c = out_c + "\t\t.set_" + var.var_name + " = NULL,\n" else: - out_c += "\t\t." + var[1] + " = " + var[0] + "_init(env, clz, " + var[1] + out_c += "\t\t." + var[1] + " = " + var[0] + "_init(" + var[1] for suparg in var[2]: if isinstance(suparg, ConvInfo): - out_c = out_c + ", " + suparg.arg_name + out_c += ", " + suparg.arg_name else: - out_c = out_c + ", " + suparg[1] + out_c += ", " + suparg[1] out_c += "),\n" out_c = out_c + "\t};\n" - for var in flattened_field_vars: + for var in flattened_field_var_conversions: if not isinstance(var, ConvInfo): - out_c = out_c + "\tcalls->" + var[1] + " = ret." + var[1] + ".this_arg;\n" + out_c = out_c + "\tcalls->" + var[1] + " = ret." + var[2] + ".this_arg;\n" out_c = out_c + "\treturn ret;\n" out_c = out_c + "}\n" - out_c += "int64_t " + self.c_fn_name_define_pfx(struct_name + "_new", True) + "jobject o" - for var in flattened_field_vars: + out_c = out_c + self.c_fn_ty_pfx + "uint64_t " + self.c_fn_name_define_pfx(struct_name + "_new", True) + "int32_t o" + for var in flattened_field_var_conversions: if isinstance(var, ConvInfo): out_c = out_c + ", " + var.c_ty + " " + var.arg_name else: - out_c = out_c + ", jobject " + var[1] + out_c = out_c + ", int32_t " + var[1] out_c = out_c + ") {\n" out_c = out_c + "\t" + struct_name + " *res_ptr = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n" - out_c = out_c + "\t*res_ptr = " + struct_name + "_init(env, clz, o" - for var in flattened_field_vars: + out_c = out_c + "\t*res_ptr = " + struct_name + "_init(o" + for var in flattened_field_var_conversions: if isinstance(var, ConvInfo): out_c = out_c + ", " + var.arg_name else: @@ -957,27 +1028,7 @@ namespace org { namespace ldk { namespace structs { out_c = out_c + "\treturn tag_ptr(res_ptr, true);\n" out_c = out_c + "}\n" - for var in flattened_field_vars: - if not isinstance(var, ConvInfo): - out_java_trait += "\n\t/**\n" - out_java_trait += "\t * Gets the underlying " + var[1] + ".\n" - out_java_trait += "\t */\n" - underscore_name = ''.join('_' + c.lower() if c.isupper() else c for c in var[1]).strip('_') - out_java_trait += "\tpublic " + var[1] + " get_" + underscore_name + "() {\n" - out_java_trait += "\t\t" + var[1] + " res = new " + var[1] + "(null, bindings." + struct_name + "_get_" + var[1] + "(this.ptr));\n" - out_java_trait += "\t\tthis.ptrs_to.AddLast(res);\n" - out_java_trait += "\t\treturn res;\n" - out_java_trait += "\t}\n" - out_java_trait += "\n" - - out_java += self.native_meth_decl(struct_name + "_get_" + var[1], "long") + "(long arg);\n" - - out_c += "int64_t " + self.c_fn_name_define_pfx(struct_name + "_get_" + var[1], True) + "int64_t arg) {\n" - out_c += "\t" + struct_name + " *inp = (" + struct_name + " *)untag_ptr(arg);\n" - out_c += "\treturn tag_ptr(&inp->" + var[1] + ", false);\n" - out_c += "}\n" - - return (out_java, out_java_trait, out_c) + return (out_typescript_bindings, out_typescript_human, out_c) def trait_struct_inc_refcnt(self, ty_info): base_conv = "\nif (" + ty_info.var_name + "_conv.free == " + ty_info.rust_obj + "_JCalls_free) {\n" @@ -1329,4 +1380,54 @@ namespace org { namespace ldk { namespace structs { return (out_java, out_c, out_java_struct + extra_java_struct_out) def cleanup(self): - pass + with open(self.outdir + "src/org/ldk/impl/bindings.cs", "a") as bindings: + for fn_suffix in self.function_ptrs: + jret = self.function_ptrs[fn_suffix]["ret"][0] + jargs = self.function_ptrs[fn_suffix]["args"][0] + + bindings.write(f""" + static {jret} c_callback_{fn_suffix}(int obj_ptr, int fn_id{jargs}) {{ + if (obj_ptr >= js_objs.Count) {{ + Console.Error.WriteLine("Got function call on unknown/free'd JS object in {fn_suffix}"); + Console.Error.Flush(); + Environment.Exit(42); + }} + object obj = js_objs[obj_ptr].Target; + if (obj == null) {{ + Console.Error.WriteLine("Got function call on GC'd JS object in {fn_suffix}"); + Console.Error.Flush(); + Environment.Exit(43); + }} +""") + bindings.write("\t\tswitch (fn_id) {\n") + for f in self.function_ptrs[fn_suffix]: + if f != "ret" and f != "args" and f != "call": + bindings.write(f"""\t\t\tcase {str(f)}: + if (!(obj is {self.function_ptrs[fn_suffix][f][0]})) {{ + Console.Error.WriteLine("Got function call to object that wasn't a {self.function_ptrs[fn_suffix][f][0]} in {fn_suffix}"); + Console.Error.Flush(); + Environment.Exit(44); + }}\n""") + call = f"(({self.function_ptrs[fn_suffix][f][0]})obj).{self.function_ptrs[fn_suffix][f][1]}({self.function_ptrs[fn_suffix][f][2]});" + if jret != "void": + bindings.write("\t\t\t\treturn " + call) + else: + bindings.write("\t\t\t\t" + call + "\n\t\t\t\treturn;") + bindings.write("\n") + + bindings.write(f"""\t\t\tdefault: + Console.Error.WriteLine("Got unknown function call with id " + fn_id + " from C in {fn_suffix}"); + Console.Error.Flush(); + Environment.Exit(45); + return{" false" if jret == "bool" else " 0" if jret != "void" else ""}; + }} + }} + public delegate {jret} {fn_suffix}_callback(int obj_ptr, int fn_id{jargs}); +""") + bindings.write(self.native_meth_decl(f"register_{fn_suffix}_invoker", "int") + f"({fn_suffix}_callback callee);\n") + # Easiest way to get a static run is just define a variable, even if we dont care + bindings.write(f"\tstatic int _run_{fn_suffix}_registration = register_{fn_suffix}_invoker(c_callback_{fn_suffix});") + + bindings.write(""" +} +} } }""")