/[pcsx2_0.9.7]/trunk/3rdparty/w32pthreads/pthread_setcancelstate.c
ViewVC logotype

Contents of /trunk/3rdparty/w32pthreads/pthread_setcancelstate.c

Parent Directory Parent Directory | Revision Log Revision Log


Revision 31 - (show annotations) (download)
Tue Sep 7 03:24:11 2010 UTC (9 years, 11 months ago) by william
File MIME type: text/plain
File size: 4007 byte(s)
committing r3113 initial commit again...
1 /*
2 * pthread_setcancelstate.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
40 int
41 pthread_setcancelstate (int state, int *oldstate)
42 /*
43 * ------------------------------------------------------
44 * DOCPUBLIC
45 * This function atomically sets the calling thread's
46 * cancelability state to 'state' and returns the previous
47 * cancelability state at the location referenced by
48 * 'oldstate'
49 *
50 * PARAMETERS
51 * state,
52 * oldstate
53 * PTHREAD_CANCEL_ENABLE
54 * cancellation is enabled,
55 *
56 * PTHREAD_CANCEL_DISABLE
57 * cancellation is disabled
58 *
59 *
60 * DESCRIPTION
61 * This function atomically sets the calling thread's
62 * cancelability state to 'state' and returns the previous
63 * cancelability state at the location referenced by
64 * 'oldstate'.
65 *
66 * NOTES:
67 * 1) Use to disable cancellation around 'atomic' code that
68 * includes cancellation points
69 *
70 * COMPATIBILITY ADDITIONS
71 * If 'oldstate' is NULL then the previous state is not returned
72 * but the function still succeeds. (Solaris)
73 *
74 * RESULTS
75 * 0 successfully set cancelability type,
76 * EINVAL 'state' is invalid
77 *
78 * ------------------------------------------------------
79 */
80 {
81 int result = 0;
82 pthread_t self = pthread_self ();
83 ptw32_thread_t * sp = (ptw32_thread_t *) self.p;
84
85 if (sp == NULL
86 || (state != PTHREAD_CANCEL_ENABLE && state != PTHREAD_CANCEL_DISABLE))
87 {
88 return EINVAL;
89 }
90
91 /*
92 * Lock for async-cancel safety.
93 */
94 (void) pthread_mutex_lock (&sp->cancelLock);
95
96 if (oldstate != NULL)
97 {
98 *oldstate = sp->cancelState;
99 }
100
101 sp->cancelState = state;
102
103 /*
104 * Check if there is a pending asynchronous cancel
105 */
106 if (state == PTHREAD_CANCEL_ENABLE
107 && sp->cancelType == PTHREAD_CANCEL_ASYNCHRONOUS
108 && WaitForSingleObject (sp->cancelEvent, 0) == WAIT_OBJECT_0)
109 {
110 sp->state = PThreadStateCanceling;
111 sp->cancelState = PTHREAD_CANCEL_DISABLE;
112 ResetEvent (sp->cancelEvent);
113 (void) pthread_mutex_unlock (&sp->cancelLock);
114 ptw32_throw (PTW32_EPS_CANCEL);
115
116 /* Never reached */
117 }
118
119 (void) pthread_mutex_unlock (&sp->cancelLock);
120
121 return (result);
122
123 } /* pthread_setcancelstate */

  ViewVC Help
Powered by ViewVC 1.1.22