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- // Copyright 2013 The Chromium 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 "gin/array_buffer.h"
- #include <stddef.h>
- #include <stdlib.h>
- #include "base/allocator/partition_allocator/page_allocator.h"
- #include "base/check_op.h"
- #include "build/build_config.h"
- #include "gin/per_isolate_data.h"
- #if BUILDFLAG(IS_POSIX)
- #include <sys/mman.h>
- #ifndef MAP_ANONYMOUS
- #define MAP_ANONYMOUS MAP_ANON
- #endif
- #endif // BUILDFLAG(IS_POSIX)
- namespace gin {
- static_assert(V8_ARRAY_BUFFER_INTERNAL_FIELD_COUNT == 2,
- "array buffers must have two internal fields");
- // ArrayBufferAllocator -------------------------------------------------------
- void* ArrayBufferAllocator::Allocate(size_t length) {
- // TODO(bbudge) Use partition allocator for malloc/calloc allocations.
- return calloc(1, length);
- }
- void* ArrayBufferAllocator::AllocateUninitialized(size_t length) {
- return malloc(length);
- }
- void ArrayBufferAllocator::Free(void* data, size_t length) {
- free(data);
- }
- ArrayBufferAllocator* ArrayBufferAllocator::SharedInstance() {
- static ArrayBufferAllocator* instance = new ArrayBufferAllocator();
- return instance;
- }
- // ArrayBuffer ----------------------------------------------------------------
- ArrayBuffer::ArrayBuffer() = default;
- ArrayBuffer::ArrayBuffer(v8::Isolate* isolate, v8::Local<v8::ArrayBuffer> array)
- : backing_store_(array->GetBackingStore()) {}
- ArrayBuffer::~ArrayBuffer() = default;
- ArrayBuffer& ArrayBuffer::operator=(const ArrayBuffer& other) = default;
- // Converter<ArrayBuffer> -----------------------------------------------------
- bool Converter<ArrayBuffer>::FromV8(v8::Isolate* isolate,
- v8::Local<v8::Value> val,
- ArrayBuffer* out) {
- if (!val->IsArrayBuffer())
- return false;
- *out = ArrayBuffer(isolate, v8::Local<v8::ArrayBuffer>::Cast(val));
- return true;
- }
- // ArrayBufferView ------------------------------------------------------------
- ArrayBufferView::ArrayBufferView()
- : offset_(0),
- num_bytes_(0) {
- }
- ArrayBufferView::ArrayBufferView(v8::Isolate* isolate,
- v8::Local<v8::ArrayBufferView> view)
- : array_buffer_(isolate, view->Buffer()),
- offset_(view->ByteOffset()),
- num_bytes_(view->ByteLength()) {
- }
- ArrayBufferView::~ArrayBufferView() = default;
- ArrayBufferView& ArrayBufferView::operator=(const ArrayBufferView& other) =
- default;
- // Converter<ArrayBufferView> -------------------------------------------------
- bool Converter<ArrayBufferView>::FromV8(v8::Isolate* isolate,
- v8::Local<v8::Value> val,
- ArrayBufferView* out) {
- if (!val->IsArrayBufferView())
- return false;
- *out = ArrayBufferView(isolate, v8::Local<v8::ArrayBufferView>::Cast(val));
- return true;
- }
- } // namespace gin
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