include/eintr_wrapper.h

// Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// This provides a wrapper around system calls which may be interrupted by a
// signal and return EINTR. See man 7 signal.

#ifndef GESTURES_EINTR_WRAPPER_H_
#define GESTURES_EINTR_WRAPPER_H_

#include <errno.h>

#define HANDLE_EINTR(x) ({ \
  typeof(x) eintr_wrapper_result; \
  do { \
    eintr_wrapper_result = (x); \
  } while (eintr_wrapper_result == -1 && errno == EINTR); \
  eintr_wrapper_result; \
})

#define IGNORE_EINTR(x) ({ \
  typeof(x) eintr_wrapper_result; \
  do { \
    eintr_wrapper_result = (x); \
    if (eintr_wrapper_result == -1 && errno == EINTR) { \
      eintr_wrapper_result = 0; \
    } \
  } while (0); \
  eintr_wrapper_result; \
})

#endif  // GESTURES_EINTR_WRAPPER_H_