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
