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thr_suspend_np.c (178647) thr_suspend_np.c (212536)
1/*
2 * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>.
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

--- 12 unchanged lines hidden (view full) ---

21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
1/*
2 * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>.
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

--- 12 unchanged lines hidden (view full) ---

21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: head/lib/libthr/thread/thr_suspend_np.c 178647 2008-04-29 03:58:18Z davidxu $
29 * $FreeBSD: head/lib/libthr/thread/thr_suspend_np.c 212536 2010-09-13 07:03:01Z davidxu $
30 */
31
32#include "namespace.h"
33#include <errno.h>
34#include <pthread.h>
35#include <pthread_np.h>
36#include "un-namespace.h"
37

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71
72void
73_pthread_suspend_all_np(void)
74{
75 struct pthread *curthread = _get_curthread();
76 struct pthread *thread;
77 int ret;
78
30 */
31
32#include "namespace.h"
33#include <errno.h>
34#include <pthread.h>
35#include <pthread_np.h>
36#include "un-namespace.h"
37

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71
72void
73_pthread_suspend_all_np(void)
74{
75 struct pthread *curthread = _get_curthread();
76 struct pthread *thread;
77 int ret;
78
79 THREAD_LIST_LOCK(curthread);
79 THREAD_LIST_RDLOCK(curthread);
80
81 TAILQ_FOREACH(thread, &_thread_list, tle) {
82 if (thread != curthread) {
83 THR_THREAD_LOCK(curthread, thread);
84 if (thread->state != PS_DEAD &&
85 !(thread->flags & THR_FLAGS_SUSPENDED))
86 thread->flags |= THR_FLAGS_NEED_SUSPEND;
87 THR_THREAD_UNLOCK(curthread, thread);
88 }
89 }
90 thr_kill(-1, SIGCANCEL);
91
92restart:
93 TAILQ_FOREACH(thread, &_thread_list, tle) {
94 if (thread != curthread) {
95 /* First try to suspend the thread without waiting */
96 THR_THREAD_LOCK(curthread, thread);
97 ret = suspend_common(curthread, thread, 0);
98 if (ret == 0) {
80
81 TAILQ_FOREACH(thread, &_thread_list, tle) {
82 if (thread != curthread) {
83 THR_THREAD_LOCK(curthread, thread);
84 if (thread->state != PS_DEAD &&
85 !(thread->flags & THR_FLAGS_SUSPENDED))
86 thread->flags |= THR_FLAGS_NEED_SUSPEND;
87 THR_THREAD_UNLOCK(curthread, thread);
88 }
89 }
90 thr_kill(-1, SIGCANCEL);
91
92restart:
93 TAILQ_FOREACH(thread, &_thread_list, tle) {
94 if (thread != curthread) {
95 /* First try to suspend the thread without waiting */
96 THR_THREAD_LOCK(curthread, thread);
97 ret = suspend_common(curthread, thread, 0);
98 if (ret == 0) {
99 /* Can not suspend, try to wait */
100 thread->refcount++;
101 THREAD_LIST_UNLOCK(curthread);
99 THREAD_LIST_UNLOCK(curthread);
100 /* Can not suspend, try to wait */
101 THR_REF_ADD(curthread, thread);
102 suspend_common(curthread, thread, 1);
102 suspend_common(curthread, thread, 1);
103 THR_THREAD_UNLOCK(curthread, thread);
104 THREAD_LIST_LOCK(curthread);
105 _thr_ref_delete_unlocked(curthread, thread);
103 THR_REF_DEL(curthread, thread);
104 _thr_try_gc(curthread, thread);
105 /* thread lock released */
106
107 THREAD_LIST_RDLOCK(curthread);
106 /*
107 * Because we were blocked, things may have
108 * been changed, we have to restart the
109 * process.
110 */
111 goto restart;
112 }
113 THR_THREAD_UNLOCK(curthread, thread);

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122 int waitok)
123{
124 long tmp;
125
126 while (thread->state != PS_DEAD &&
127 !(thread->flags & THR_FLAGS_SUSPENDED)) {
128 thread->flags |= THR_FLAGS_NEED_SUSPEND;
129 tmp = thread->cycle;
108 /*
109 * Because we were blocked, things may have
110 * been changed, we have to restart the
111 * process.
112 */
113 goto restart;
114 }
115 THR_THREAD_UNLOCK(curthread, thread);

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124 int waitok)
125{
126 long tmp;
127
128 while (thread->state != PS_DEAD &&
129 !(thread->flags & THR_FLAGS_SUSPENDED)) {
130 thread->flags |= THR_FLAGS_NEED_SUSPEND;
131 tmp = thread->cycle;
130 THR_THREAD_UNLOCK(curthread, thread);
131 _thr_send_sig(thread, SIGCANCEL);
132 _thr_send_sig(thread, SIGCANCEL);
133 THR_THREAD_UNLOCK(curthread, thread);
132 if (waitok) {
133 _thr_umtx_wait_uint(&thread->cycle, tmp, NULL, 0);
134 THR_THREAD_LOCK(curthread, thread);
135 } else {
136 THR_THREAD_LOCK(curthread, thread);
137 return (0);
138 }
139 }
140
141 return (1);
142}
134 if (waitok) {
135 _thr_umtx_wait_uint(&thread->cycle, tmp, NULL, 0);
136 THR_THREAD_LOCK(curthread, thread);
137 } else {
138 THR_THREAD_LOCK(curthread, thread);
139 return (0);
140 }
141 }
142
143 return (1);
144}