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// Copyright 2010 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_EXTENSIONS_GC_EXTENSION_H_
#define V8_EXTENSIONS_GC_EXTENSION_H_
#include "include/v8-extension.h"
#include "include/v8-local-handle.h"
#include "src/base/strings.h"
namespace v8 {
template <typename T>
class FunctionCallbackInfo;
namespace internal {
// Provides garbage collection on invoking |fun_name|(options), where
// - options is a dictionary like object. See supported properties below.
// - no parameter refers to options:
// {type: 'major', execution: 'sync'}.
// - truthy parameter that is not setting any options:
// {type: 'minor', execution: 'sync'}.
//
// Supported options:
// - type: 'major' or 'minor' for full GC and Scavenge, respectively.
// - execution: 'sync' or 'async' for synchronous and asynchronous execution,
// respectively.
// - Defaults to {type: 'major', execution: 'sync'}.
//
// Returns a Promise that resolves when GC is done when asynchronous execution
// is requested, and undefined otherwise.
class GCExtension : public v8::Extension {
public:
explicit GCExtension(const char* fun_name)
: v8::Extension("v8/gc",
BuildSource(buffer_, sizeof(buffer_), fun_name)) {}
v8::Local<v8::FunctionTemplate> GetNativeFunctionTemplate(
v8::Isolate* isolate, v8::Local<v8::String> name) override;
static void GC(const v8::FunctionCallbackInfo<v8::Value>& info);
private:
static const char* BuildSource(char* buf, size_t size, const char* fun_name) {
base::SNPrintF(base::Vector<char>(buf, static_cast<int>(size)),
"native function %s();", fun_name);
return buf;
}
char buffer_[50];
};
} // namespace internal
} // namespace v8
#endif // V8_EXTENSIONS_GC_EXTENSION_H_
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