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/files/file.h"
   9 #include "base/process/process.h"
  10 #include "ipc/ipc_export.h"
  11
  12 #if defined(OS_POSIX)
  13 #include "base/file_descriptor_posix.h"
  14 #endif
  15
  16 namespace IPC {
  17
  18 #if defined(OS_WIN)
  19 typedef base::PlatformFile PlatformFileForTransit;
  20 #elif defined(OS_POSIX)
  21 typedef base::FileDescriptor PlatformFileForTransit;
  22 #endif
  23
  24 inline PlatformFileForTransit InvalidPlatformFileForTransit() {
  25 #if defined(OS_WIN)
  26   return INVALID_HANDLE_VALUE;
  27 #elif defined(OS_POSIX)
  28   return base::FileDescriptor();
  29 #endif
  30 }
  31
  32 inline base::PlatformFile PlatformFileForTransitToPlatformFile(
  33     const PlatformFileForTransit& transit) {
  34 #if defined(OS_WIN)
  35   return transit;
  36 #elif defined(OS_POSIX)
  37   return transit.fd;
  38 #endif
  39 }
  40
  41 inline base::File PlatformFileForTransitToFile(
  42     const PlatformFileForTransit& transit) {
  43 #if defined(OS_WIN)
  44   return base::File(transit);
  45 #elif defined(OS_POSIX)
  46   return base::File(transit.fd);
  47 #endif
  48 }
  49
  50 // Returns a file handle equivalent to |file| that can be used in |process|.
  51 IPC_EXPORT PlatformFileForTransit GetFileHandleForProcess(
  52     base::PlatformFile file,
  53     base::ProcessHandle process,
  54     bool close_source_handle);
  55
  56 // Returns a file handle equivalent to |file| that can be used in |process|.
  57 // Note that this function takes ownership of |file|.
  58 IPC_EXPORT PlatformFileForTransit TakeFileHandleForProcess(
  59     base::File file,
  60     base::ProcessHandle process);
  61
  62 }  // namespace IPC
  63
  64 #endif  // IPC_IPC_PLATFORM_FILE_H_