blob: 852e6a23e667164905348b41380b8eceb2f1bd34 [file] [log] [blame]
// Copyright 2017 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/shared_memory_handle.h"
#include <unistd.h>
#include "base/logging.h"
#include "base/posix/eintr_wrapper.h"
#include "base/unguessable_token.h"
#include "starboard/types.h"
namespace base {
SharedMemoryHandle::SharedMemoryHandle() = default;
SharedMemoryHandle::SharedMemoryHandle(
const base::FileDescriptor& file_descriptor,
size_t size,
const base::UnguessableToken& guid)
: file_descriptor_(file_descriptor), guid_(guid), size_(size) {}
// static
SharedMemoryHandle SharedMemoryHandle::ImportHandle(int fd, size_t size) {
SharedMemoryHandle handle;
handle.file_descriptor_.fd = fd;
handle.file_descriptor_.auto_close = false;
handle.guid_ = UnguessableToken::Create();
handle.size_ = size;
return handle;
}
int SharedMemoryHandle::GetHandle() const {
return file_descriptor_.fd;
}
bool SharedMemoryHandle::IsValid() const {
return file_descriptor_.fd >= 0;
}
void SharedMemoryHandle::Close() const {
if (IGNORE_EINTR(close(file_descriptor_.fd)) < 0)
PLOG(ERROR) << "close";
}
int SharedMemoryHandle::Release() {
int old_fd = file_descriptor_.fd;
file_descriptor_.fd = -1;
return old_fd;
}
SharedMemoryHandle SharedMemoryHandle::Duplicate() const {
if (!IsValid())
return SharedMemoryHandle();
int duped_handle = HANDLE_EINTR(dup(file_descriptor_.fd));
if (duped_handle < 0)
return SharedMemoryHandle();
return SharedMemoryHandle(FileDescriptor(duped_handle, true), GetSize(),
GetGUID());
}
void SharedMemoryHandle::SetOwnershipPassesToIPC(bool ownership_passes) {
file_descriptor_.auto_close = ownership_passes;
}
bool SharedMemoryHandle::OwnershipPassesToIPC() const {
return file_descriptor_.auto_close;
}
} // namespace base