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- // Copyright (c) 2012 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 "base/memory/ref_counted_memory.h"
- #include <utility>
- #include "base/check_op.h"
- #include "base/memory/read_only_shared_memory_region.h"
- namespace base {
- bool RefCountedMemory::Equals(
- const scoped_refptr<RefCountedMemory>& other) const {
- return other.get() &&
- size() == other->size() &&
- (memcmp(front(), other->front(), size()) == 0);
- }
- RefCountedMemory::RefCountedMemory() = default;
- RefCountedMemory::~RefCountedMemory() = default;
- const unsigned char* RefCountedStaticMemory::front() const {
- return data_;
- }
- size_t RefCountedStaticMemory::size() const {
- return length_;
- }
- RefCountedStaticMemory::~RefCountedStaticMemory() = default;
- RefCountedBytes::RefCountedBytes() = default;
- RefCountedBytes::RefCountedBytes(const std::vector<unsigned char>& initializer)
- : data_(initializer) {}
- RefCountedBytes::RefCountedBytes(base::span<const unsigned char> initializer)
- : data_(initializer.begin(), initializer.end()) {}
- RefCountedBytes::RefCountedBytes(const unsigned char* p, size_t size)
- : data_(p, p + size) {}
- RefCountedBytes::RefCountedBytes(size_t size) : data_(size, 0) {}
- scoped_refptr<RefCountedBytes> RefCountedBytes::TakeVector(
- std::vector<unsigned char>* to_destroy) {
- auto bytes = MakeRefCounted<RefCountedBytes>();
- bytes->data_.swap(*to_destroy);
- return bytes;
- }
- const unsigned char* RefCountedBytes::front() const {
- // STL will assert if we do front() on an empty vector, but calling code
- // expects a NULL.
- return size() ? &data_.front() : nullptr;
- }
- size_t RefCountedBytes::size() const {
- return data_.size();
- }
- RefCountedBytes::~RefCountedBytes() = default;
- RefCountedString::RefCountedString() = default;
- RefCountedString::~RefCountedString() = default;
- // static
- scoped_refptr<RefCountedString> RefCountedString::TakeString(
- std::string* to_destroy) {
- return TakeString(std::move(*to_destroy));
- }
- // static
- scoped_refptr<RefCountedString> RefCountedString::TakeString(
- std::string&& str) {
- auto self = MakeRefCounted<RefCountedString>();
- str.swap(self->data_);
- return self;
- }
- const unsigned char* RefCountedString::front() const {
- return data_.empty() ? nullptr
- : reinterpret_cast<const unsigned char*>(data_.data());
- }
- size_t RefCountedString::size() const {
- return data_.size();
- }
- RefCountedString16::RefCountedString16() = default;
- RefCountedString16::~RefCountedString16() = default;
- // static
- scoped_refptr<RefCountedString16> RefCountedString16::TakeString(
- std::u16string* to_destroy) {
- return TakeString(std::move(*to_destroy));
- }
- // static
- scoped_refptr<RefCountedString16> RefCountedString16::TakeString(
- std::u16string&& str) {
- auto self = MakeRefCounted<RefCountedString16>();
- str.swap(self->data_);
- return self;
- }
- const unsigned char* RefCountedString16::front() const {
- return reinterpret_cast<const unsigned char*>(data_.data());
- }
- size_t RefCountedString16::size() const {
- return data_.size() * sizeof(char16_t);
- }
- RefCountedSharedMemoryMapping::RefCountedSharedMemoryMapping(
- ReadOnlySharedMemoryMapping mapping)
- : mapping_(std::move(mapping)), size_(mapping_.size()) {
- DCHECK_GT(size_, 0U);
- }
- RefCountedSharedMemoryMapping::~RefCountedSharedMemoryMapping() = default;
- const unsigned char* RefCountedSharedMemoryMapping::front() const {
- return static_cast<const unsigned char*>(mapping_.memory());
- }
- size_t RefCountedSharedMemoryMapping::size() const {
- return size_;
- }
- // static
- scoped_refptr<RefCountedSharedMemoryMapping>
- RefCountedSharedMemoryMapping::CreateFromWholeRegion(
- const ReadOnlySharedMemoryRegion& region) {
- ReadOnlySharedMemoryMapping mapping = region.Map();
- if (!mapping.IsValid())
- return nullptr;
- return MakeRefCounted<RefCountedSharedMemoryMapping>(std::move(mapping));
- }
- } // namespace base
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