base/eintr_wrapper.h

   1 // Copyright (c) 2012 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 // This provides a wrapper around system calls which may be interrupted by a
   6 // signal and return EINTR. See man 7 signal.
   7 //
   8 // On Windows, this wrapper macro does nothing.
   9
  10 #ifndef BASE_EINTR_WRAPPER_H_
  11 #define BASE_EINTR_WRAPPER_H_
  12
  13 #include "build/build_config.h"
  14
  15 #if defined(OS_POSIX)
  16
  17 #include <errno.h>
  18
  19 #define HANDLE_EINTR(x) ({ \
  20   typeof(x) __eintr_result__; \
  21   do { \
  22     __eintr_result__ = (x); \
  23   } while (__eintr_result__ == -1 && errno == EINTR); \
  24   __eintr_result__;\
  25 })
  26
  27 #else
  28
  29 #define HANDLE_EINTR(x) (x)
  30
  31 #endif  // OS_POSIX
  32
  33 #endif  // BASE_EINTR_WRAPPER_H_