projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| d4697bc9 | 1 | /* Copyright (C) 2002-2014 Free Software Foundation, Inc. |
| 76a50749 UD |
2 | This file is part of the GNU C Library. |
| 3 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. | |
| 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 | |
| 59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ | |
| 76a50749 UD |
18 | |
| 19 | #include "pthreadP.h" | |
| 20 | #include <lowlevellock.h> | |
| 21 | ||
| 22 | ||
| 23 | ||
| e51deae7 | 24 | static int once_lock = LLL_LOCK_INITIALIZER; |
| 76a50749 UD |
25 | |
| 26 | ||
| 27 | int | |
| 28 | __pthread_once (once_control, init_routine) | |
| 29 | pthread_once_t *once_control; | |
| 30 | void (*init_routine) (void); | |
| 31 | { | |
| 32 | /* XXX Depending on whether the LOCK_IN_ONCE_T is defined use a | |
| 33 | global lock variable or one which is part of the pthread_once_t | |
| 34 | object. */ | |
| 35 | if (*once_control == PTHREAD_ONCE_INIT) | |
| 36 | { | |
| e51deae7 | 37 | lll_lock (once_lock, LLL_PRIVATE); |
| 76a50749 UD |
38 | |
| 39 | /* XXX This implementation is not complete. It doesn't take | |
| 40 | cancelation and fork into account. */ | |
| 41 | if (*once_control == PTHREAD_ONCE_INIT) | |
| 42 | { | |
| 43 | init_routine (); | |
| 44 | ||
| 45 | *once_control = !PTHREAD_ONCE_INIT; | |
| 46 | } | |
| 47 | ||
| e51deae7 | 48 | lll_unlock (once_lock, LLL_PRIVATE); |
| 76a50749 UD |
49 | } |
| 50 | ||
| 51 | return 0; | |
| 52 | } | |
| 53 | strong_alias (__pthread_once, pthread_once) | |
| 4d17e683 | 54 | hidden_def (__pthread_once) |