1 | // Copyright (c) 2010 Google Inc. |
2 | // All rights reserved. |
3 | // |
4 | // Redistribution and use in source and binary forms, with or without |
5 | // modification, are permitted provided that the following conditions are |
6 | // met: |
7 | // |
8 | // * Redistributions of source code must retain the above copyright |
9 | // notice, this list of conditions and the following disclaimer. |
10 | // * Redistributions in binary form must reproduce the above |
11 | // copyright notice, this list of conditions and the following disclaimer |
12 | // in the documentation and/or other materials provided with the |
13 | // distribution. |
14 | // * Neither the name of Google Inc. nor the names of its |
15 | // contributors may be used to endorse or promote products derived from |
16 | // this software without specific prior written permission. |
17 | // |
18 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
19 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
20 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
21 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
22 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
23 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
24 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
25 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
26 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
27 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
28 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
29 | |
30 | #ifndef COMMON_LINUX_EINTR_WRAPPER_H_ |
31 | #define COMMON_LINUX_EINTR_WRAPPER_H_ |
32 | |
33 | #include <errno.h> |
34 | |
35 | // This provides a wrapper around system calls which may be interrupted by a |
36 | // signal and return EINTR. See man 7 signal. |
37 | // |
38 | |
39 | #define HANDLE_EINTR(x) ({ \ |
40 | __typeof__(x) eintr_wrapper_result; \ |
41 | do { \ |
42 | eintr_wrapper_result = (x); \ |
43 | } while (eintr_wrapper_result == -1 && errno == EINTR); \ |
44 | eintr_wrapper_result; \ |
45 | }) |
46 | |
47 | #define IGNORE_EINTR(x) ({ \ |
48 | __typeof__(x) eintr_wrapper_result; \ |
49 | do { \ |
50 | eintr_wrapper_result = (x); \ |
51 | if (eintr_wrapper_result == -1 && errno == EINTR) { \ |
52 | eintr_wrapper_result = 0; \ |
53 | } \ |
54 | } while (0); \ |
55 | eintr_wrapper_result; \ |
56 | }) |
57 | |
58 | #endif // COMMON_LINUX_EINTR_WRAPPER_H_ |
59 | |