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// Copyright 2017 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.
#include "src/heap/array-buffer-collector.h"
#include "src/base/template-utils.h"
#include "src/heap/array-buffer-tracker.h"
#include "src/heap/heap-inl.h"
namespace v8 {
namespace internal {
void ArrayBufferCollector::AddGarbageAllocations(
std::vector<JSArrayBuffer::Allocation> allocations) {
base::LockGuard<base::Mutex> guard(&allocations_mutex_);
allocations_.push_back(std::move(allocations));
}
void ArrayBufferCollector::FreeAllocations() {
base::LockGuard<base::Mutex> guard(&allocations_mutex_);
for (const std::vector<JSArrayBuffer::Allocation>& allocations :
allocations_) {
for (JSArrayBuffer::Allocation alloc : allocations) {
JSArrayBuffer::FreeBackingStore(heap_->isolate(), alloc);
}
}
allocations_.clear();
}
class ArrayBufferCollector::FreeingTask final : public CancelableTask {
public:
explicit FreeingTask(Heap* heap)
: CancelableTask(heap->isolate()), heap_(heap) {}
virtual ~FreeingTask() {}
private:
void RunInternal() final {
TRACE_BACKGROUND_GC(
heap_->tracer(),
GCTracer::BackgroundScope::BACKGROUND_ARRAY_BUFFER_FREE);
heap_->array_buffer_collector()->FreeAllocations();
}
Heap* heap_;
};
void ArrayBufferCollector::FreeAllocationsOnBackgroundThread() {
// TODO(wez): Remove backing-store from external memory accounting.
heap_->account_external_memory_concurrently_freed();
if (!heap_->IsTearingDown() && FLAG_concurrent_array_buffer_freeing) {
V8::GetCurrentPlatform()->CallOnWorkerThread(
base::make_unique<FreeingTask>(heap_));
} else {
// Fallback for when concurrency is disabled/restricted.
FreeAllocations();
}
}
} // namespace internal
} // namespace v8
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