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#ifndef SRC_NODE_NATIVE_MODULE_H_
#define SRC_NODE_NATIVE_MODULE_H_
#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
#include <map>
#include <set>
#include <string>
#include "env.h"
#include "node_mutex.h"
#include "node_union_bytes.h"
#include "v8.h"
namespace node {
namespace native_module {
using NativeModuleRecordMap = std::map<std::string, UnionBytes>;
using NativeModuleCacheMap =
std::unordered_map<std::string,
std::unique_ptr<v8::ScriptCompiler::CachedData>>;
// The native (C++) side of the NativeModule in JS land, which
// handles compilation and caching of builtin modules (NativeModule)
// and bootstrappers, whose source are bundled into the binary
// as static data.
// This class should not depend on a particular isolate, context, or
// environment. Rather it should take them as arguments when necessary.
// The instances of this class are per-process.
class NativeModuleLoader {
public:
NativeModuleLoader();
// TODO(joyeecheung): maybe we should make this a singleton, instead of
// putting it in per_process.
NativeModuleLoader(const NativeModuleLoader&) = delete;
NativeModuleLoader& operator=(const NativeModuleLoader&) = delete;
static void Initialize(v8::Local<v8::Object> target,
v8::Local<v8::Value> unused,
v8::Local<v8::Context> context,
void* priv);
v8::Local<v8::Object> GetSourceObject(v8::Local<v8::Context> context) const;
// Returns config.gypi as a JSON string
v8::Local<v8::String> GetConfigString(v8::Isolate* isolate) const;
bool Exists(const char* id);
// For bootstrappers optional_env may be a nullptr.
// If an exception is encountered (e.g. source code contains
// syntax error), the returned value is empty.
v8::MaybeLocal<v8::Function> LookupAndCompile(
v8::Local<v8::Context> context,
const char* id,
std::vector<v8::Local<v8::String>>* parameters,
Environment* optional_env);
private:
static void GetCacheUsage(const v8::FunctionCallbackInfo<v8::Value>& args);
// Passing ids of builtin module source code into JS land as
// internalBinding('native_module').moduleIds
static void ModuleIdsGetter(v8::Local<v8::Name> property,
const v8::PropertyCallbackInfo<v8::Value>& info);
// Passing config.gypi into JS land as internalBinding('native_module').config
static void ConfigStringGetter(
v8::Local<v8::Name> property,
const v8::PropertyCallbackInfo<v8::Value>& info);
// Get code cache for a specific native module
static void GetCodeCache(const v8::FunctionCallbackInfo<v8::Value>& args);
v8::MaybeLocal<v8::Uint8Array> GetCodeCache(v8::Isolate* isolate,
const char* id) const;
// Compile a specific native module as a function
static void CompileFunction(const v8::FunctionCallbackInfo<v8::Value>& args);
// Generated by tools/js2c.py as node_javascript.cc
void LoadJavaScriptSource(); // Loads data into source_
UnionBytes GetConfig(); // Return data for config.gypi
// Generated by tools/generate_code_cache.js as node_code_cache.cc when
// the build is configured with --code-cache-path=.... They are noops
// in node_code_cache_stub.cc
void LoadCodeCache(); // Loads data into code_cache_
// Compile a script as a NativeModule that can be loaded via
// NativeModule.p.require in JS land.
static v8::MaybeLocal<v8::Function> CompileAsModule(Environment* env,
const char* id);
NativeModuleRecordMap source_;
NativeModuleCacheMap code_cache_;
UnionBytes config_;
// Used to synchronize access to the code cache map
Mutex code_cache_mutex_;
};
} // namespace native_module
namespace per_process {
extern native_module::NativeModuleLoader native_module_loader;
} // namespace per_process
} // namespace node
#endif // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
#endif // SRC_NODE_NATIVE_MODULE_H_
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