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/platform_file.h"
  11 #include "base/process/process.h"
  12 #include "ipc/ipc_export.h"
  13
  14 #if defined(OS_POSIX)
  15 #include "base/file_descriptor_posix.h"
  16 #endif
  17
  18 namespace IPC {
  19
  20 #if defined(OS_WIN)
  21 typedef base::PlatformFile PlatformFileForTransit;
  22 #elif defined(OS_POSIX)
  23 typedef base::FileDescriptor PlatformFileForTransit;
  24 #endif
  25
  26 inline PlatformFileForTransit InvalidPlatformFileForTransit() {
  27 #if defined(OS_WIN)
  28   return base::kInvalidPlatformFileValue;
  29 #elif defined(OS_POSIX)
  30   return base::FileDescriptor();
  31 #endif
  32 }
  33
  34 inline base::PlatformFile PlatformFileForTransitToPlatformFile(
  35     const PlatformFileForTransit& transit) {
  36 #if defined(OS_WIN)
  37   return transit;
  38 #elif defined(OS_POSIX)
  39   return transit.fd;
  40 #endif
  41 }
  42
  43 inline base::File PlatformFileForTransitToFile(
  44     const PlatformFileForTransit& transit) {
  45 #if defined(OS_WIN)
  46   return base::File(transit);
  47 #elif defined(OS_POSIX)
  48   return base::File(transit.fd);
  49 #endif
  50 }
  51
  52 // Returns a file handle equivalent to |file| that can be used in |process|.
  53 IPC_EXPORT PlatformFileForTransit GetFileHandleForProcess(
  54     base::PlatformFile file,
  55     base::ProcessHandle process,
  56     bool close_source_handle);
  57
  58 // Returns a file handle equivalent to |file| that can be used in |process|.
  59 // Note that this function takes ownership of |file|.
  60 IPC_EXPORT PlatformFileForTransit TakeFileHandleForProcess(
  61     base::File file,
  62     base::ProcessHandle process);
  63
  64 }  // namespace IPC
  65
  66 #endif  // IPC_IPC_PLATFORM_FILE_H_