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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 defined(OS_POSIX)
#include <sys/mman.h>
#ifndef MAP_ANONYMOUS
#define MAP_ANONYMOUS MAP_ANON
#endif
#endif // defined(OS_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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