ipc/ipc_platform_file.h

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef IPC_IPC_PLATFORM_FILE_H_
   6 #define IPC_IPC_PLATFORM_FILE_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/files/file.h"
  10 #include "base/process/process.h"
  11 #include "ipc/ipc_export.h"
  12
  13 #if defined(OS_POSIX)
  14 #include "base/file_descriptor_posix.h"
  15 #endif
  16
  17 namespace IPC {
  18
  19 #if defined(OS_WIN)
  20 typedef base::PlatformFile PlatformFileForTransit;
  21 #elif defined(OS_POSIX)
  22 typedef base::FileDescriptor PlatformFileForTransit;
  23 #endif
  24
  25 inline PlatformFileForTransit InvalidPlatformFileForTransit() {
  26 #if defined(OS_WIN)
  27   return INVALID_HANDLE_VALUE;
  28 #elif defined(OS_POSIX)
  29   return base::FileDescriptor();
  30 #endif
  31 }
  32
  33 inline base::PlatformFile PlatformFileForTransitToPlatformFile(
  34     const PlatformFileForTransit& transit) {
  35 #if defined(OS_WIN)
  36   return transit;
  37 #elif defined(OS_POSIX)
  38   return transit.fd;
  39 #endif
  40 }
  41
  42 inline base::File PlatformFileForTransitToFile(
  43     const PlatformFileForTransit& transit) {
  44 #if defined(OS_WIN)
  45   return base::File(transit);
  46 #elif defined(OS_POSIX)
  47   return base::File(transit.fd);
  48 #endif
  49 }
  50
  51 // Returns a file handle equivalent to |file| that can be used in |process|.
  52 IPC_EXPORT PlatformFileForTransit GetFileHandleForProcess(
  53     base::PlatformFile file,
  54     base::ProcessHandle process,
  55     bool close_source_handle);
  56
  57 // Returns a file handle equivalent to |file| that can be used in |process|.
  58 // Note that this function takes ownership of |file|.
  59 IPC_EXPORT PlatformFileForTransit TakeFileHandleForProcess(
  60     base::File file,
  61     base::ProcessHandle process);
  62
  63 }  // namespace IPC
  64
  65 #endif  // IPC_IPC_PLATFORM_FILE_H_