contrib/bind-9.2.4rc7/lib/isc/pthreads/thread.c

   1 /*
   2  * Copyright (C) 2004  Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (C) 2000, 2001, 2003  Internet Software Consortium.
   4  *
   5  * Permission to use, copy, modify, and 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 1.9.2.4 2004/03/09 06:12:07 marka Exp $ */
  19
  20 #include <config.h>
  21
  22 #include <isc/thread.h>
  23 #include <isc/util.h>
  24
  25 #ifndef THREAD_MINSTACKSIZE
  26 #define THREAD_MINSTACKSIZE             (64U * 1024)
  27 #endif
  28
  29 isc_result_t
  30 isc_thread_create(isc_threadfunc_t func, isc_threadarg_t arg,
  31                   isc_thread_t *thread)
  32 {
  33         pthread_attr_t attr;
  34         size_t stacksize;
  35         int ret;
  36
  37         pthread_attr_init(&attr);
  38
  39 #if defined(HAVE_PTHREAD_ATTR_GETSTACKSIZE) && \
  40     defined(HAVE_PTHREAD_ATTR_SETSTACKSIZE)
  41         ret = pthread_attr_getstacksize(&attr, &stacksize);
  42         if (ret != 0)
  43                 return (ISC_R_UNEXPECTED);
  44
  45         if (stacksize < THREAD_MINSTACKSIZE) {
  46                 ret = pthread_attr_setstacksize(&attr, THREAD_MINSTACKSIZE);
  47                 if (ret != 0)
  48                         return (ISC_R_UNEXPECTED);
  49         }
  50 #endif
  51
  52         ret = pthread_create(thread, &attr, func, arg);
  53         if (ret != 0)
  54                 return (ISC_R_UNEXPECTED);
  55
  56         pthread_attr_destroy(&attr);
  57
  58         return (ISC_R_SUCCESS);
  59 }
  60
  61 void
  62 isc_thread_setconcurrency(unsigned int level) {
  63 #if defined(CALL_PTHREAD_SETCONCURRENCY)
  64         (void)pthread_setconcurrency(level);
  65 #else
  66         UNUSED(level);
  67 #endif
  68 }