| // Copyright (c) 2010 Google Inc. |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #ifndef COMMON_LINUX_EINTR_WRAPPER_H_ |
| #define COMMON_LINUX_EINTR_WRAPPER_H_ |
| |
| #include <errno.h> |
| |
| // This provides a wrapper around system calls which may be interrupted by a |
| // signal and return EINTR. See man 7 signal. |
| // |
| |
| #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 // COMMON_LINUX_EINTR_WRAPPER_H_ |