| thr_pspinlock.c (157457) | thr_pspinlock.c (161068) |
|---|---|
| 1/*- 2 * Copyright (c) 2003 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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * | 1/*- 2 * Copyright (c) 2003 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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * |
| 26 * $FreeBSD: head/lib/libthr/thread/thr_pspinlock.c 157457 2006-04-04 02:57:49Z davidxu $ | 26 * $FreeBSD: head/lib/libthr/thread/thr_pspinlock.c 161068 2006-08-08 04:42:41Z davidxu $ |
| 27 */ 28 29#include "namespace.h" 30#include <errno.h> 31#include <stdlib.h> 32#include <pthread.h> 33#include "un-namespace.h" 34 --- 64 unchanged lines hidden (view full) --- 99 int ret, count; 100 101 if (lock == NULL || (lck = *lock) == NULL) 102 ret = EINVAL; 103 else { 104 count = SPIN_COUNT; 105 while ((ret = THR_UMTX_TRYLOCK(curthread, &lck->s_lock)) != 0) { 106 while (lck->s_lock) { | 27 */ 28 29#include "namespace.h" 30#include <errno.h> 31#include <stdlib.h> 32#include <pthread.h> 33#include "un-namespace.h" 34 --- 64 unchanged lines hidden (view full) --- 99 int ret, count; 100 101 if (lock == NULL || (lck = *lock) == NULL) 102 ret = EINVAL; 103 else { 104 count = SPIN_COUNT; 105 while ((ret = THR_UMTX_TRYLOCK(curthread, &lck->s_lock)) != 0) { 106 while (lck->s_lock) { |
| 107#ifdef __i386__ 108 /* tell cpu we are spinning */ 109 __asm __volatile("pause"); 110#endif 111 if (--count <= 0) { 112 count = SPIN_COUNT; | 107 if (_thr_smp_cpus <= 1) { |
| 113 _pthread_yield(); | 108 _pthread_yield(); |
| 109 } else { 110#if defined(__i386__) || defined(__x86_64__) 111 /* tell cpu we are spinning */ 112 __asm __volatile("pause"); 113#endif 114 if (--count <= 0) { 115 count = SPIN_COUNT; 116 _pthread_yield(); 117 } |
|
| 114 } 115 } 116 } 117 ret = 0; 118 } 119 120 return (ret); 121} --- 15 unchanged lines hidden --- | 118 } 119 } 120 } 121 ret = 0; 122 } 123 124 return (ret); 125} --- 15 unchanged lines hidden --- |