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// Copyright 2020 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_HEAP_GC_CALLBACKS_H_
#define V8_HEAP_GC_CALLBACKS_H_
#include <algorithm>
#include <tuple>
#include <vector>
#include "include/v8-callbacks.h"
#include "src/base/logging.h"
#include "src/common/assert-scope.h"
namespace v8::internal {
class GCCallbacks final {
public:
using CallbackType = void (*)(v8::Isolate*, GCType, GCCallbackFlags, void*);
void Add(CallbackType callback, v8::Isolate* isolate, GCType gc_type,
void* data) {
DCHECK_NOT_NULL(callback);
DCHECK_EQ(callbacks_.end(), FindCallback(callback, data));
callbacks_.emplace_back(callback, isolate, gc_type, data);
}
void Remove(CallbackType callback, void* data) {
auto it = FindCallback(callback, data);
DCHECK_NE(callbacks_.end(), it);
*it = callbacks_.back();
callbacks_.pop_back();
}
void Invoke(GCType gc_type, GCCallbackFlags gc_callback_flags) const {
AllowGarbageCollection scope;
for (const CallbackData& callback_data : callbacks_) {
if (gc_type & callback_data.gc_type) {
callback_data.callback(callback_data.isolate, gc_type,
gc_callback_flags, callback_data.user_data);
}
}
}
bool IsEmpty() const { return callbacks_.empty(); }
private:
struct CallbackData final {
CallbackData(CallbackType callback, v8::Isolate* isolate, GCType gc_type,
void* user_data)
: callback(callback),
isolate(isolate),
gc_type(gc_type),
user_data(user_data) {}
CallbackType callback;
v8::Isolate* isolate;
GCType gc_type;
void* user_data;
};
std::vector<CallbackData>::iterator FindCallback(CallbackType callback,
void* data) {
return std::find_if(callbacks_.begin(), callbacks_.end(),
[callback, data](CallbackData& callback_data) {
return callback_data.callback == callback &&
callback_data.user_data == data;
});
}
std::vector<CallbackData> callbacks_;
};
class GCCallbacksInSafepoint final {
public:
using CallbackType = void (*)(void*);
enum GCType { kLocal = 1 << 0, kShared = 1 << 1, kAll = kLocal | kShared };
void Add(CallbackType callback, void* data, GCType gc_type) {
DCHECK_NOT_NULL(callback);
DCHECK_EQ(callbacks_.end(), FindCallback(callback, data));
callbacks_.emplace_back(callback, data, gc_type);
}
void Remove(CallbackType callback, void* data) {
auto it = FindCallback(callback, data);
DCHECK_NE(callbacks_.end(), it);
*it = callbacks_.back();
callbacks_.pop_back();
}
void Invoke(GCType gc_type) const {
DisallowGarbageCollection scope;
for (const CallbackData& callback_data : callbacks_) {
if (callback_data.gc_type_ & gc_type)
callback_data.callback(callback_data.user_data);
}
}
bool IsEmpty() const { return callbacks_.empty(); }
private:
struct CallbackData final {
CallbackData(CallbackType callback, void* user_data, GCType gc_type)
: callback(callback), user_data(user_data), gc_type_(gc_type) {}
CallbackType callback;
void* user_data;
GCType gc_type_;
};
std::vector<CallbackData>::iterator FindCallback(CallbackType callback,
void* data) {
return std::find_if(callbacks_.begin(), callbacks_.end(),
[callback, data](CallbackData& callback_data) {
return callback_data.callback == callback &&
callback_data.user_data == data;
});
}
std::vector<CallbackData> callbacks_;
};
} // namespace v8::internal
#endif // V8_HEAP_GC_CALLBACKS_H_
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