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Annotation of embedaddon/ntp/lib/isc/pthreads/thread.c, revision 1.1.1.1

1.1       misho       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: }