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86 lines
2.8 KiB
86 lines
2.8 KiB
// Copyright (c) 2011 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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#ifndef IPC_IPC_PLATFORM_FILE_H_ |
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#define IPC_IPC_PLATFORM_FILE_H_ |
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#include "base/files/file.h" |
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#include "base/process/process.h" |
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#include "build/build_config.h" |
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#include "ipc/ipc_message_support_export.h" |
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#if defined(OS_POSIX) || defined(OS_FUCHSIA) |
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#include "base/file_descriptor_posix.h" |
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#endif |
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namespace IPC { |
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#if defined(OS_WIN) |
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class IPC_MESSAGE_SUPPORT_EXPORT PlatformFileForTransit { |
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public: |
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// Creates an invalid platform file. |
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PlatformFileForTransit(); |
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// Creates a platform file that takes unofficial ownership of |handle|. Note |
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// that ownership is not handled by a Scoped* class due to usage patterns of |
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// this class and its POSIX counterpart [base::FileDescriptor]. When this |
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// class is used as an input to an IPC message, the IPC subsystem will close |
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// |handle|. When this class is used as the output from an IPC message, the |
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// receiver is expected to take ownership of |handle|. |
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explicit PlatformFileForTransit(HANDLE handle); |
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// Comparison operators. |
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bool operator==(const PlatformFileForTransit& platform_file) const; |
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bool operator!=(const PlatformFileForTransit& platform_file) const; |
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HANDLE GetHandle() const; |
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bool IsValid() const; |
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private: |
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HANDLE handle_; |
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}; |
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#elif defined(OS_POSIX) || defined(OS_FUCHSIA) |
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typedef base::FileDescriptor PlatformFileForTransit; |
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#endif |
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inline PlatformFileForTransit InvalidPlatformFileForTransit() { |
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#if defined(OS_WIN) |
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return PlatformFileForTransit(); |
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#elif defined(OS_POSIX) || defined(OS_FUCHSIA) |
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return base::FileDescriptor(); |
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#endif |
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} |
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inline base::PlatformFile PlatformFileForTransitToPlatformFile( |
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const PlatformFileForTransit& transit) { |
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#if defined(OS_WIN) |
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return transit.GetHandle(); |
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#elif defined(OS_POSIX) || defined(OS_FUCHSIA) |
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return transit.fd; |
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#endif |
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} |
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inline base::File PlatformFileForTransitToFile( |
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const PlatformFileForTransit& transit) { |
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#if defined(OS_WIN) |
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return base::File(transit.GetHandle()); |
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#elif defined(OS_POSIX) || defined(OS_FUCHSIA) |
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return base::File(transit.fd); |
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#endif |
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} |
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// Creates a new handle that can be passed through IPC. The result must be |
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// passed to the IPC layer as part of a message, or else it will leak. |
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IPC_MESSAGE_SUPPORT_EXPORT PlatformFileForTransit |
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GetPlatformFileForTransit(base::PlatformFile file, bool close_source_handle); |
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// Creates a new handle that can be passed through IPC. The result must be |
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// passed to the IPC layer as part of a message, or else it will leak. |
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// Note that this function takes ownership of |file|. |
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IPC_MESSAGE_SUPPORT_EXPORT PlatformFileForTransit |
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TakePlatformFileForTransit(base::File file); |
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} // namespace IPC |
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#endif // IPC_IPC_PLATFORM_FILE_H_
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