bind - Removed version tag from contrib directory and updated README.DRAGONFLY.
[dragonfly.git] / contrib / bind / lib / isc / pthreads / thread.c
1 /*
2  * Copyright (C) 2004, 2005, 2007  Internet Systems Consortium, Inc. ("ISC")
3  * Copyright (C) 2000, 2001, 2003  Internet Software Consortium.
4  *
5  * Permission to use, copy, modify, and/or distribute this software for any
6  * purpose with or without fee is hereby granted, provided that the above
7  * copyright notice and this permission notice appear in all copies.
8  *
9  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
10  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15  * PERFORMANCE OF THIS SOFTWARE.
16  */
17
18 /* $Id: thread.c,v 1.17 2007/06/19 23:47:18 tbox Exp $ */
19
20 /*! \file */
21
22 #include <config.h>
23
24 #include <isc/thread.h>
25 #include <isc/util.h>
26
27 #ifndef THREAD_MINSTACKSIZE
28 #define THREAD_MINSTACKSIZE             (64U * 1024)
29 #endif
30
31 isc_result_t
32 isc_thread_create(isc_threadfunc_t func, isc_threadarg_t arg,
33                   isc_thread_t *thread)
34 {
35         pthread_attr_t attr;
36         size_t stacksize;
37         int ret;
38
39         pthread_attr_init(&attr);
40
41 #if defined(HAVE_PTHREAD_ATTR_GETSTACKSIZE) && \
42     defined(HAVE_PTHREAD_ATTR_SETSTACKSIZE)
43         ret = pthread_attr_getstacksize(&attr, &stacksize);
44         if (ret != 0)
45                 return (ISC_R_UNEXPECTED);
46
47         if (stacksize < THREAD_MINSTACKSIZE) {
48                 ret = pthread_attr_setstacksize(&attr, THREAD_MINSTACKSIZE);
49                 if (ret != 0)
50                         return (ISC_R_UNEXPECTED);
51         }
52 #endif
53
54 #if defined(PTHREAD_SCOPE_SYSTEM) && defined(NEED_PTHREAD_SCOPE_SYSTEM)
55         ret = pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM);
56         if (ret != 0)
57                 return (ISC_R_UNEXPECTED);
58 #endif
59
60         ret = pthread_create(thread, &attr, func, arg);
61         if (ret != 0)
62                 return (ISC_R_UNEXPECTED);
63
64         pthread_attr_destroy(&attr);
65
66         return (ISC_R_SUCCESS);
67 }
68
69 void
70 isc_thread_setconcurrency(unsigned int level) {
71 #if defined(CALL_PTHREAD_SETCONCURRENCY)
72         (void)pthread_setconcurrency(level);
73 #else
74         UNUSED(level);
75 #endif
76 }