external/bsd/ntp/dist/lib/isc/pthreads/thread.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (C) 2004, 2005, 2007  Internet Systems Consortium, Inc. ("ISC")
   5  * Copyright (C) 2000, 2001, 2003  Internet Software Consortium.
   6  *
   7  * Permission to use, copy, modify, and/or distribute this software for any
   8  * purpose with or without fee is hereby granted, provided that the above
   9  * copyright notice and this permission notice appear in all copies.
  10  *
  11  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  12  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  13  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  14  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  15  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  16  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  17  * PERFORMANCE OF THIS SOFTWARE.
  18  */
  19
  20 /* Id: thread.c,v 1.17 2007/06/19 23:47:18 tbox Exp */
  21
  22 /*! \file */
  23
  24 #include <config.h>
  25
  26 #include <isc/thread.h>
  27 #include <isc/util.h>
  28
  29 #ifndef THREAD_MINSTACKSIZE
  30 #define THREAD_MINSTACKSIZE             (64U * 1024)
  31 #endif
  32
  33 isc_result_t
  34 isc_thread_create(isc_threadfunc_t func, isc_threadarg_t arg,
  35                   isc_thread_t *thread)
  36 {
  37         pthread_attr_t attr;
  38         size_t stacksize;
  39         int ret;
  40
  41         pthread_attr_init(&attr);
  42
  43 #if defined(HAVE_PTHREAD_ATTR_GETSTACKSIZE) && \
  44     defined(HAVE_PTHREAD_ATTR_SETSTACKSIZE)
  45         ret = pthread_attr_getstacksize(&attr, &stacksize);
  46         if (ret != 0)
  47                 return (ISC_R_UNEXPECTED);
  48
  49         if (stacksize < THREAD_MINSTACKSIZE) {
  50                 ret = pthread_attr_setstacksize(&attr, THREAD_MINSTACKSIZE);
  51                 if (ret != 0)
  52                         return (ISC_R_UNEXPECTED);
  53         }
  54 #endif
  55
  56 #if defined(PTHREAD_SCOPE_SYSTEM) && defined(NEED_PTHREAD_SCOPE_SYSTEM)
  57         ret = pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM);
  58         if (ret != 0)
  59                 return (ISC_R_UNEXPECTED);
  60 #endif
  61
  62         ret = pthread_create(thread, &attr, func, arg);
  63         if (ret != 0)
  64                 return (ISC_R_UNEXPECTED);
  65
  66         pthread_attr_destroy(&attr);
  67
  68         return (ISC_R_SUCCESS);
  69 }
  70
  71 void
  72 isc_thread_setconcurrency(unsigned int level) {
  73 #if defined(CALL_PTHREAD_SETCONCURRENCY)
  74         (void)pthread_setconcurrency(level);
  75 #else
  76         UNUSED(level);
  77 #endif
  78 }