1*9712c20fSFrederick Mayle // Copyright 2010 Google LLC 2*9712c20fSFrederick Mayle // 3*9712c20fSFrederick Mayle // Redistribution and use in source and binary forms, with or without 4*9712c20fSFrederick Mayle // modification, are permitted provided that the following conditions are 5*9712c20fSFrederick Mayle // met: 6*9712c20fSFrederick Mayle // 7*9712c20fSFrederick Mayle // * Redistributions of source code must retain the above copyright 8*9712c20fSFrederick Mayle // notice, this list of conditions and the following disclaimer. 9*9712c20fSFrederick Mayle // * Redistributions in binary form must reproduce the above 10*9712c20fSFrederick Mayle // copyright notice, this list of conditions and the following disclaimer 11*9712c20fSFrederick Mayle // in the documentation and/or other materials provided with the 12*9712c20fSFrederick Mayle // distribution. 13*9712c20fSFrederick Mayle // * Neither the name of Google LLC nor the names of its 14*9712c20fSFrederick Mayle // contributors may be used to endorse or promote products derived from 15*9712c20fSFrederick Mayle // this software without specific prior written permission. 16*9712c20fSFrederick Mayle // 17*9712c20fSFrederick Mayle // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18*9712c20fSFrederick Mayle // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19*9712c20fSFrederick Mayle // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20*9712c20fSFrederick Mayle // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21*9712c20fSFrederick Mayle // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22*9712c20fSFrederick Mayle // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23*9712c20fSFrederick Mayle // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24*9712c20fSFrederick Mayle // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25*9712c20fSFrederick Mayle // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26*9712c20fSFrederick Mayle // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27*9712c20fSFrederick Mayle // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28*9712c20fSFrederick Mayle 29*9712c20fSFrederick Mayle #ifndef COMMON_LINUX_EINTR_WRAPPER_H_ 30*9712c20fSFrederick Mayle #define COMMON_LINUX_EINTR_WRAPPER_H_ 31*9712c20fSFrederick Mayle 32*9712c20fSFrederick Mayle #include <errno.h> 33*9712c20fSFrederick Mayle 34*9712c20fSFrederick Mayle // This provides a wrapper around system calls which may be interrupted by a 35*9712c20fSFrederick Mayle // signal and return EINTR. See man 7 signal. 36*9712c20fSFrederick Mayle // 37*9712c20fSFrederick Mayle 38*9712c20fSFrederick Mayle #define HANDLE_EINTR(x) ({ \ 39*9712c20fSFrederick Mayle __typeof__(x) eintr_wrapper_result; \ 40*9712c20fSFrederick Mayle do { \ 41*9712c20fSFrederick Mayle eintr_wrapper_result = (x); \ 42*9712c20fSFrederick Mayle } while (eintr_wrapper_result == -1 && errno == EINTR); \ 43*9712c20fSFrederick Mayle eintr_wrapper_result; \ 44*9712c20fSFrederick Mayle }) 45*9712c20fSFrederick Mayle 46*9712c20fSFrederick Mayle #define IGNORE_EINTR(x) ({ \ 47*9712c20fSFrederick Mayle __typeof__(x) eintr_wrapper_result; \ 48*9712c20fSFrederick Mayle do { \ 49*9712c20fSFrederick Mayle eintr_wrapper_result = (x); \ 50*9712c20fSFrederick Mayle if (eintr_wrapper_result == -1 && errno == EINTR) { \ 51*9712c20fSFrederick Mayle eintr_wrapper_result = 0; \ 52*9712c20fSFrederick Mayle } \ 53*9712c20fSFrederick Mayle } while (0); \ 54*9712c20fSFrederick Mayle eintr_wrapper_result; \ 55*9712c20fSFrederick Mayle }) 56*9712c20fSFrederick Mayle 57*9712c20fSFrederick Mayle #endif // COMMON_LINUX_EINTR_WRAPPER_H_ 58