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// Copyright 2014 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_COMPILER_ZONE_POOL_H_
#define V8_COMPILER_ZONE_POOL_H_
#include <map>
#include <set>
#include <vector>
#include "src/zone.h"
namespace v8 {
namespace internal {
namespace compiler {
class ZonePool final {
public:
class Scope final {
public:
explicit Scope(ZonePool* zone_pool)
: zone_pool_(zone_pool), zone_(nullptr) {}
~Scope() { Destroy(); }
Zone* zone() {
if (zone_ == nullptr) zone_ = zone_pool_->NewEmptyZone();
return zone_;
}
void Destroy() {
if (zone_ != nullptr) zone_pool_->ReturnZone(zone_);
zone_ = nullptr;
}
private:
ZonePool* const zone_pool_;
Zone* zone_;
DISALLOW_COPY_AND_ASSIGN(Scope);
};
class StatsScope final {
public:
explicit StatsScope(ZonePool* zone_pool);
~StatsScope();
size_t GetMaxAllocatedBytes();
size_t GetCurrentAllocatedBytes();
size_t GetTotalAllocatedBytes();
private:
friend class ZonePool;
void ZoneReturned(Zone* zone);
typedef std::map<Zone*, size_t> InitialValues;
ZonePool* const zone_pool_;
InitialValues initial_values_;
size_t total_allocated_bytes_at_start_;
size_t max_allocated_bytes_;
DISALLOW_COPY_AND_ASSIGN(StatsScope);
};
ZonePool();
~ZonePool();
size_t GetMaxAllocatedBytes();
size_t GetTotalAllocatedBytes();
size_t GetCurrentAllocatedBytes();
private:
Zone* NewEmptyZone();
void ReturnZone(Zone* zone);
static const size_t kMaxUnusedSize = 3;
typedef std::vector<Zone*> Unused;
typedef std::vector<Zone*> Used;
typedef std::vector<StatsScope*> Stats;
Unused unused_;
Used used_;
Stats stats_;
size_t max_allocated_bytes_;
size_t total_deleted_bytes_;
DISALLOW_COPY_AND_ASSIGN(ZonePool);
};
} // namespace compiler
} // namespace internal
} // namespace v8
#endif
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