| thr_once.c (220888) | thr_once.c (287556) |
|---|---|
| 1/* 2 * Copyright (c) 2005, David Xu <davidxu@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 9 unchanged lines hidden (view full) --- 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * | 1/* 2 * Copyright (c) 2005, David Xu <davidxu@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 9 unchanged lines hidden (view full) --- 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * |
| 26 * $FreeBSD: head/lib/libthr/thread/thr_once.c 220888 2011-04-20 14:19:34Z rstone $ | 26 * $FreeBSD: head/lib/libthr/thread/thr_once.c 287556 2015-09-08 08:41:07Z kib $ |
| 27 * 28 */ 29 30#include "namespace.h" 31#include <pthread.h> 32#include "un-namespace.h" 33 34#include "thr_private.h" --- 28 unchanged lines hidden (view full) --- 63{ 64 struct pthread *curthread; 65 int state; 66 67 _thr_check_init(); 68 69 for (;;) { 70 state = once_control->state; | 27 * 28 */ 29 30#include "namespace.h" 31#include <pthread.h> 32#include "un-namespace.h" 33 34#include "thr_private.h" --- 28 unchanged lines hidden (view full) --- 63{ 64 struct pthread *curthread; 65 int state; 66 67 _thr_check_init(); 68 69 for (;;) { 70 state = once_control->state; |
| 71 if (state == ONCE_DONE) | 71 if (state == ONCE_DONE) { 72 atomic_thread_fence_acq(); |
| 72 return (0); | 73 return (0); |
| 74 } |
|
| 73 if (state == ONCE_NEVER_DONE) { | 75 if (state == ONCE_NEVER_DONE) { |
| 74 if (atomic_cmpset_acq_int(&once_control->state, state, ONCE_IN_PROGRESS)) | 76 if (atomic_cmpset_int(&once_control->state, state, ONCE_IN_PROGRESS)) |
| 75 break; 76 } else if (state == ONCE_IN_PROGRESS) { | 77 break; 78 } else if (state == ONCE_IN_PROGRESS) { |
| 77 if (atomic_cmpset_acq_int(&once_control->state, state, ONCE_WAIT)) | 79 if (atomic_cmpset_int(&once_control->state, state, ONCE_WAIT)) |
| 78 _thr_umtx_wait_uint(&once_control->state, ONCE_WAIT, NULL, 0); 79 } else if (state == ONCE_WAIT) { 80 _thr_umtx_wait_uint(&once_control->state, state, NULL, 0); 81 } else 82 return (EINVAL); 83 } 84 85 curthread = _get_curthread(); --- 14 unchanged lines hidden --- | 80 _thr_umtx_wait_uint(&once_control->state, ONCE_WAIT, NULL, 0); 81 } else if (state == ONCE_WAIT) { 82 _thr_umtx_wait_uint(&once_control->state, state, NULL, 0); 83 } else 84 return (EINVAL); 85 } 86 87 curthread = _get_curthread(); --- 14 unchanged lines hidden --- |