/[pcsx2_0.9.7]/trunk/3rdparty/w32pthreads/pthread_testcancel.c
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Contents of /trunk/3rdparty/w32pthreads/pthread_testcancel.c

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Revision 31 - (show annotations) (download)
Tue Sep 7 03:24:11 2010 UTC (9 years, 11 months ago) by william
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committing r3113 initial commit again...
1 /*
2 * pthread_testcancel.c
3 *
4 * Description:
5 * POSIX thread functions related to thread cancellation.
6 *
7 * --------------------------------------------------------------------------
8 *
9 * Pthreads-win32 - POSIX Threads Library for Win32
10 * Copyright(C) 1998 John E. Bossom
11 * Copyright(C) 1999,2005 Pthreads-win32 contributors
12 *
13 * Contact Email: rpj@callisto.canberra.edu.au
14 *
15 * The current list of contributors is contained
16 * in the file CONTRIBUTORS included with the source
17 * code distribution. The list can also be seen at the
18 * following World Wide Web location:
19 * http://sources.redhat.com/pthreads-win32/contributors.html
20 *
21 * This library is free software; you can redistribute it and/or
22 * modify it under the terms of the GNU Lesser General Public
23 * License as published by the Free Software Foundation; either
24 * version 2 of the License, or (at your option) any later version.
25 *
26 * This library is distributed in the hope that it will be useful,
27 * but WITHOUT ANY WARRANTY; without even the implied warranty of
28 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
29 * Lesser General Public License for more details.
30 *
31 * You should have received a copy of the GNU Lesser General Public
32 * License along with this library in the file COPYING.LIB;
33 * if not, write to the Free Software Foundation, Inc.,
34 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
35 */
36
37 #include "ptw32pch.h"
38
39 INLINE void
40 pthread_testcancel (void)
41 /*
42 * ------------------------------------------------------
43 * DOCPUBLIC
44 * This function creates a deferred cancellation point
45 * in the calling thread. The call has no effect if the
46 * current cancelability state is
47 * PTHREAD_CANCEL_DISABLE
48 *
49 * PARAMETERS
50 * N/A
51 *
52 *
53 * DESCRIPTION
54 * This function creates a deferred cancellation point
55 * in the calling thread. The call has no effect if the
56 * current cancelability state is
57 * PTHREAD_CANCEL_DISABLE
58 *
59 * NOTES:
60 * 1) Cancellation is asynchronous. Use pthread_join
61 * to wait for termination of thread if necessary
62 *
63 * RESULTS
64 * N/A
65 *
66 * ------------------------------------------------------
67 */
68 {
69 ptw32_thread_t * sp;
70 if( ptw32_testcancel_enable == 0 ) return;
71
72 // Don't use pthread_self here, to avoid unnecessary object query or creation.
73 // If ptw32_selfThread is NULL, then it's a sure bet no one's tried to cancel
74 // this thread, since that would have spawned a selfThread object! -- air
75
76 sp = (ptw32_thread_t *) pthread_getspecific (ptw32_selfThreadKey);
77
78 if (sp == NULL)
79 {
80 return;
81 }
82
83 /*
84 * Pthread_cancel() will have set sp->state to PThreadStateCancelPending
85 * and set an event, so no need to enter kernel space if
86 * sp->state != PThreadStateCancelPending - that only slows us down.
87 */
88 if (sp->state != PThreadStateCancelPending)
89 {
90 return;
91 }
92
93 (void) pthread_mutex_lock (&sp->cancelLock);
94
95 if (sp->cancelState != PTHREAD_CANCEL_DISABLE)
96 {
97 ResetEvent(sp->cancelEvent);
98 sp->state = PThreadStateCanceling;
99 (void) pthread_mutex_unlock (&sp->cancelLock);
100 sp->cancelState = PTHREAD_CANCEL_DISABLE;
101 (void) pthread_mutex_unlock (&sp->cancelLock);
102 ptw32_throw (PTW32_EPS_CANCEL);
103 }
104
105 (void) pthread_mutex_unlock (&sp->cancelLock);
106 } /* pthread_testcancel */

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