bind - Removed version tag from contrib directory and updated README.DRAGONFLY.
[dragonfly.git] / contrib / bind / lib / isc / pthreads / thread.c
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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
31isc_result_t
32isc_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
69void
70isc_thread_setconcurrency(unsigned int level) {
71#if defined(CALL_PTHREAD_SETCONCURRENCY)
72 (void)pthread_setconcurrency(level);
73#else
74 UNUSED(level);
75#endif
76}