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Side by Side Diff: src/compiler/zone-pool.h

Issue 2360403003: Revert of Replaced different means of zone pooling/reusing by one zone segment pool (Closed)
Patch Set: Created 4 years, 3 months ago
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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/zone/zone.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)
23 : zone_pool_(zone_pool), zone_(nullptr) {}
24 ~Scope() { Destroy(); }
25
26 Zone* zone() {
27 if (zone_ == nullptr) zone_ = zone_pool_->NewEmptyZone();
28 return zone_;
29 }
30 void Destroy() {
31 if (zone_ != nullptr) zone_pool_->ReturnZone(zone_);
32 zone_ = nullptr;
33 }
34
35 private:
36 ZonePool* const zone_pool_;
37 Zone* zone_;
38 DISALLOW_COPY_AND_ASSIGN(Scope);
39 };
40
41 class StatsScope final {
42 public:
43 explicit StatsScope(ZonePool* zone_pool);
44 ~StatsScope();
45
46 size_t GetMaxAllocatedBytes();
47 size_t GetCurrentAllocatedBytes();
48 size_t GetTotalAllocatedBytes();
49
50 private:
51 friend class ZonePool;
52 void ZoneReturned(Zone* zone);
53
54 typedef std::map<Zone*, size_t> InitialValues;
55
56 ZonePool* const zone_pool_;
57 InitialValues initial_values_;
58 size_t total_allocated_bytes_at_start_;
59 size_t max_allocated_bytes_;
60
61 DISALLOW_COPY_AND_ASSIGN(StatsScope);
62 };
63
64 explicit ZonePool(AccountingAllocator* allocator);
65 ~ZonePool();
66
67 size_t GetMaxAllocatedBytes();
68 size_t GetTotalAllocatedBytes();
69 size_t GetCurrentAllocatedBytes();
70
71 private:
72 Zone* NewEmptyZone();
73 void ReturnZone(Zone* zone);
74
75 static const size_t kMaxUnusedSize = 3;
76 typedef std::vector<Zone*> Unused;
77 typedef std::vector<Zone*> Used;
78 typedef std::vector<StatsScope*> Stats;
79
80 Unused unused_;
81 Used used_;
82 Stats stats_;
83 size_t max_allocated_bytes_;
84 size_t total_deleted_bytes_;
85 AccountingAllocator* allocator_;
86
87 DISALLOW_COPY_AND_ASSIGN(ZonePool);
88 };
89
90 } // namespace compiler
91 } // namespace internal
92 } // namespace v8
93
94 #endif
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