1 // Copyright 2017 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_HEAP_ARRAY_BUFFER_COLLECTOR_H_ 6 #define V8_HEAP_ARRAY_BUFFER_COLLECTOR_H_ 7 8 #include <vector> 9 10 #include "src/base/platform/mutex.h" 11 #include "src/objects/js-array-buffer.h" 12 13 namespace v8 { 14 namespace internal { 15 16 class Heap; 17 18 // To support background processing of array buffer backing stores, we process 19 // array buffers using the ArrayBufferTracker class. The ArrayBufferCollector 20 // keeps track of garbage backing stores so that they can be freed on a 21 // background thread. 22 class ArrayBufferCollector { 23 public: 24 explicit ArrayBufferCollector(Heap* heap) : heap_(heap) {} 25 26 ~ArrayBufferCollector() { FreeAllocations(); } 27 28 // These allocations will begin to be freed once FreeAllocations() is called, 29 // or on TearDown. 30 void AddGarbageAllocations( 31 std::vector<JSArrayBuffer::Allocation> allocations); 32 33 // Calls FreeAllocations() on a background thread. 34 void FreeAllocationsOnBackgroundThread(); 35 36 private: 37 class FreeingTask; 38 39 // Begin freeing the allocations added through AddGarbageAllocations. Also 40 // called by TearDown. 41 void FreeAllocations(); 42 43 Heap* heap_; 44 base::Mutex allocations_mutex_; 45 std::vector<std::vector<JSArrayBuffer::Allocation>> allocations_; 46 }; 47 48 } // namespace internal 49 } // namespace v8 50 51 #endif // V8_HEAP_ARRAY_BUFFER_COLLECTOR_H_ 52
