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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40285824): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif
#include <cstdint>
#include <memory>
#include "components/reporting/resources/resource_managed_buffer.h"
#include "base/check_op.h"
#include "base/memory/scoped_refptr.h"
#include "components/reporting/util/status.h"
namespace reporting {
ResourceManagedBuffer::ResourceManagedBuffer(
scoped_refptr<ResourceManager> memory_resource)
: memory_resource_(memory_resource) {}
ResourceManagedBuffer::~ResourceManagedBuffer() {
Clear();
}
Status ResourceManagedBuffer::Allocate(size_t size) {
// Lose whatever was allocated before (if any).
Clear();
// Register with resource management.
if (!memory_resource_->Reserve(size)) {
return Status(error::RESOURCE_EXHAUSTED,
"Not enough memory for the buffer");
}
// Commit memory allocation.
size_ = size;
buffer_ = std::make_unique<char[]>(size);
return Status::StatusOK();
}
void ResourceManagedBuffer::Clear() {
if (buffer_) {
buffer_.reset();
}
if (size_ > 0) {
memory_resource_->Discard(size_);
size_ = 0;
}
}
char* ResourceManagedBuffer::at(size_t pos) {
CHECK_LT(pos, size_);
return buffer_.get() + pos;
}
size_t ResourceManagedBuffer::size() const {
return size_;
}
bool ResourceManagedBuffer::empty() const {
return size_ == 0;
}
} // namespace reporting
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