// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/memory/ref_counted_memory.h"
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#include <utility>
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#include "base/logging.h"
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#include "base/memory/read_only_shared_memory_region.h"
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namespace base {
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bool RefCountedMemory::Equals(
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const scoped_refptr<RefCountedMemory>& other) const {
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return other.get() &&
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size() == other->size() &&
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(memcmp(front(), other->front(), size()) == 0);
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}
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RefCountedMemory::RefCountedMemory() = default;
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RefCountedMemory::~RefCountedMemory() = default;
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const unsigned char* RefCountedStaticMemory::front() const {
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return data_;
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}
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size_t RefCountedStaticMemory::size() const {
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return length_;
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}
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RefCountedStaticMemory::~RefCountedStaticMemory() = default;
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RefCountedBytes::RefCountedBytes() = default;
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RefCountedBytes::RefCountedBytes(const std::vector<unsigned char>& initializer)
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: data_(initializer) {
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}
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RefCountedBytes::RefCountedBytes(const unsigned char* p, size_t size)
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: data_(p, p + size) {}
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RefCountedBytes::RefCountedBytes(size_t size) : data_(size, 0) {}
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scoped_refptr<RefCountedBytes> RefCountedBytes::TakeVector(
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std::vector<unsigned char>* to_destroy) {
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auto bytes = MakeRefCounted<RefCountedBytes>();
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bytes->data_.swap(*to_destroy);
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return bytes;
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}
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const unsigned char* RefCountedBytes::front() const {
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// STL will assert if we do front() on an empty vector, but calling code
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// expects a NULL.
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return size() ? &data_.front() : nullptr;
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}
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size_t RefCountedBytes::size() const {
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return data_.size();
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}
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RefCountedBytes::~RefCountedBytes() = default;
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RefCountedString::RefCountedString() = default;
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RefCountedString::~RefCountedString() = default;
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// static
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scoped_refptr<RefCountedString> RefCountedString::TakeString(
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std::string* to_destroy) {
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auto self = MakeRefCounted<RefCountedString>();
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to_destroy->swap(self->data_);
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return self;
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}
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const unsigned char* RefCountedString::front() const {
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return data_.empty() ? nullptr
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: reinterpret_cast<const unsigned char*>(data_.data());
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}
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size_t RefCountedString::size() const {
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return data_.size();
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}
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RefCountedSharedMemory::RefCountedSharedMemory(
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std::unique_ptr<SharedMemory> shm,
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size_t size)
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: shm_(std::move(shm)), size_(size) {
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DCHECK(shm_);
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DCHECK(shm_->memory());
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DCHECK_GT(size_, 0U);
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DCHECK_LE(size_, shm_->mapped_size());
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}
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RefCountedSharedMemory::~RefCountedSharedMemory() = default;
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const unsigned char* RefCountedSharedMemory::front() const {
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return static_cast<const unsigned char*>(shm_->memory());
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}
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size_t RefCountedSharedMemory::size() const {
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return size_;
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}
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RefCountedSharedMemoryMapping::RefCountedSharedMemoryMapping(
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ReadOnlySharedMemoryMapping mapping)
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: mapping_(std::move(mapping)), size_(mapping_.size()) {
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DCHECK_GT(size_, 0U);
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}
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RefCountedSharedMemoryMapping::~RefCountedSharedMemoryMapping() = default;
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const unsigned char* RefCountedSharedMemoryMapping::front() const {
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return static_cast<const unsigned char*>(mapping_.memory());
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}
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size_t RefCountedSharedMemoryMapping::size() const {
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return size_;
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}
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// static
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scoped_refptr<RefCountedSharedMemoryMapping>
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RefCountedSharedMemoryMapping::CreateFromWholeRegion(
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const ReadOnlySharedMemoryRegion& region) {
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ReadOnlySharedMemoryMapping mapping = region.Map();
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if (!mapping.IsValid())
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return nullptr;
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return MakeRefCounted<RefCountedSharedMemoryMapping>(std::move(mapping));
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}
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} // namespace base
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