Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 1 | // Copyright 2014 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #ifndef V8_COMPILER_ZONE_POOL_H_ |
| 6 | #define V8_COMPILER_ZONE_POOL_H_ |
| 7 | |
| 8 | #include <map> |
| 9 | #include <set> |
| 10 | #include <vector> |
| 11 | |
| 12 | #include "src/v8.h" |
| 13 | |
| 14 | namespace v8 { |
| 15 | namespace internal { |
| 16 | namespace compiler { |
| 17 | |
| 18 | class ZonePool FINAL { |
| 19 | public: |
| 20 | class Scope FINAL { |
| 21 | public: |
| 22 | explicit Scope(ZonePool* zone_pool) : zone_pool_(zone_pool), zone_(NULL) {} |
| 23 | ~Scope() { Destroy(); } |
| 24 | |
| 25 | Zone* zone() { |
| 26 | if (zone_ == NULL) zone_ = zone_pool_->NewEmptyZone(); |
| 27 | return zone_; |
| 28 | } |
| 29 | void Destroy() { |
| 30 | if (zone_ != NULL) zone_pool_->ReturnZone(zone_); |
| 31 | zone_ = NULL; |
| 32 | } |
| 33 | |
| 34 | private: |
| 35 | ZonePool* const zone_pool_; |
| 36 | Zone* zone_; |
| 37 | DISALLOW_COPY_AND_ASSIGN(Scope); |
| 38 | }; |
| 39 | |
| 40 | class StatsScope FINAL { |
| 41 | public: |
| 42 | explicit StatsScope(ZonePool* zone_pool); |
| 43 | ~StatsScope(); |
| 44 | |
| 45 | size_t GetMaxAllocatedBytes(); |
| 46 | size_t GetCurrentAllocatedBytes(); |
| 47 | size_t GetTotalAllocatedBytes(); |
| 48 | |
| 49 | private: |
| 50 | friend class ZonePool; |
| 51 | void ZoneReturned(Zone* zone); |
| 52 | |
| 53 | typedef std::map<Zone*, size_t> InitialValues; |
| 54 | |
| 55 | ZonePool* const zone_pool_; |
| 56 | InitialValues initial_values_; |
| 57 | size_t total_allocated_bytes_at_start_; |
| 58 | size_t max_allocated_bytes_; |
| 59 | |
| 60 | DISALLOW_COPY_AND_ASSIGN(StatsScope); |
| 61 | }; |
| 62 | |
| 63 | explicit ZonePool(Isolate* isolate); |
| 64 | ~ZonePool(); |
| 65 | |
| 66 | size_t GetMaxAllocatedBytes(); |
| 67 | size_t GetTotalAllocatedBytes(); |
| 68 | size_t GetCurrentAllocatedBytes(); |
| 69 | |
| 70 | private: |
| 71 | Zone* NewEmptyZone(); |
| 72 | void ReturnZone(Zone* zone); |
| 73 | |
| 74 | static const size_t kMaxUnusedSize = 3; |
| 75 | typedef std::vector<Zone*> Unused; |
| 76 | typedef std::vector<Zone*> Used; |
| 77 | typedef std::vector<StatsScope*> Stats; |
| 78 | |
| 79 | Isolate* const isolate_; |
| 80 | Unused unused_; |
| 81 | Used used_; |
| 82 | Stats stats_; |
| 83 | size_t max_allocated_bytes_; |
| 84 | size_t total_deleted_bytes_; |
| 85 | |
| 86 | DISALLOW_COPY_AND_ASSIGN(ZonePool); |
| 87 | }; |
| 88 | |
| 89 | } // namespace compiler |
| 90 | } // namespace internal |
| 91 | } // namespace v8 |
| 92 | |
| 93 | #endif |