projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| f7a9f785 | 1 | /* Copyright (C) 2011-2016 Free Software Foundation, Inc. |
| a63c7fa1 CM |
2 | This file is part of the GNU C Library. |
| 3 | Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. | |
| 4 | ||
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| 6 | modify it under the terms of the GNU Lesser General Public | |
| 7 | License as published by the Free Software Foundation; either | |
| 8 | version 2.1 of the License, or (at your option) any later version. | |
| 9 | ||
| 10 | The GNU C Library is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | Lesser General Public License for more details. | |
| 14 | ||
| 15 | You should have received a copy of the GNU Lesser General Public | |
| ab84e3ff PE |
16 | License along with the GNU C Library. If not, see |
| 17 | <http://www.gnu.org/licenses/>. */ | |
| a63c7fa1 CM |
18 | |
| 19 | #include <sys/time.h> | |
| 20 | #include <sys/types.h> | |
| 21 | #include <sys/select.h> | |
| 22 | #include <errno.h> | |
| 23 | #include <sysdep-cancel.h> | |
| 24 | ||
| 25 | /* Check the first NFDS descriptors each in READFDS (if not NULL) for read | |
| 26 | readiness, in WRITEFDS (if not NULL) for write readiness, and in EXCEPTFDS | |
| 27 | (if not NULL) for exceptional conditions. If TIMEOUT is not NULL, time out | |
| 28 | after waiting the interval specified therein. Returns the number of ready | |
| 29 | descriptors, or -1 for errors. */ | |
| 30 | ||
| 31 | int | |
| 32 | __select(int nfds, fd_set *readfds, | |
| 33 | fd_set *writefds, fd_set *exceptfds, | |
| 34 | struct timeval *timeout) | |
| 35 | { | |
| 36 | int result; | |
| 37 | struct timespec ts, *tsp = NULL; | |
| 38 | ||
| 39 | if (timeout) | |
| 40 | { | |
| 41 | TIMEVAL_TO_TIMESPEC (timeout, &ts); | |
| 42 | tsp = &ts; | |
| 43 | } | |
| 44 | ||
| c6bb095e AZ |
45 | result = SYSCALL_CANCEL (pselect6, nfds, readfds, writefds, exceptfds, tsp, |
| 46 | NULL); | |
| a63c7fa1 CM |
47 | |
| 48 | if (timeout) | |
| 49 | { | |
| 50 | /* Linux by default will update the timeout after a pselect6 syscall | |
| 51 | (though the pselect() glibc call suppresses this behavior). | |
| 52 | Since select() on Linux has the same behavior as the pselect6 | |
| 53 | syscall, we update the timeout here. */ | |
| 54 | TIMESPEC_TO_TIMEVAL (timeout, &ts); | |
| 55 | } | |
| 56 | ||
| 57 | return result; | |
| 58 | } | |
| 59 | libc_hidden_def (__select) | |
| 60 | ||
| 61 | weak_alias (__select, select) | |
| 62 | weak_alias (__select, __libc_select) |