blob: 8592efa8cea30bd9ad0830d8ed734fbd344bc907 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
// Copyright (c) 2012 The Chromium 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.
//
// On Windows, this wrapper macro does nothing because there are no
// signals.
//
// Don't wrap close calls in HANDLE_EINTR. Use IGNORE_EINTR if the return
// value of close is significant. See http://crbug.com/269623.
#ifndef BASE_EINTR_WRAPPER_H_
#define BASE_EINTR_WRAPPER_H_
#if defined(XP_UNIX)
# include <errno.h>
# define HANDLE_EINTR(x) \
({ \
decltype(x) eintr_wrapper_result; \
do { \
eintr_wrapper_result = (x); \
} while (eintr_wrapper_result == -1 && errno == EINTR); \
eintr_wrapper_result; \
})
# define IGNORE_EINTR(x) \
({ \
decltype(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; \
})
# define HANDLE_RV_EINTR(x) \
({ \
decltype(x) eintr_wrapper_result; \
do { \
eintr_wrapper_result = (x); \
} while (eintr_wrapper_result == EINTR); \
eintr_wrapper_result; \
})
#else
# define HANDLE_EINTR(x) (x)
# define IGNORE_EINTR(x) (x)
# define HANDLE_RV_EINTR(x) (x)
#endif // XP_UNIX
#endif // !BASE_EINTR_WRAPPER_H_
|
