1/* 2 * Copyright (C) 2004, 2005, 2007, 2013 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#if defined(HAVE_SCHED_H) 25#include <sched.h> 26#endif 27 28#include <isc/thread.h> 29#include <isc/util.h> 30 31#ifndef THREAD_MINSTACKSIZE 32#define THREAD_MINSTACKSIZE (1024U * 1024) 33#endif 34 35isc_result_t 36isc_thread_create(isc_threadfunc_t func, isc_threadarg_t arg, 37 isc_thread_t *thread) 38{ 39 pthread_attr_t attr; 40 size_t stacksize; 41 int ret; 42 43 pthread_attr_init(&attr); 44 45#if defined(HAVE_PTHREAD_ATTR_GETSTACKSIZE) && \ 46 defined(HAVE_PTHREAD_ATTR_SETSTACKSIZE) 47 ret = pthread_attr_getstacksize(&attr, &stacksize); 48 if (ret != 0) 49 return (ISC_R_UNEXPECTED); 50 51 if (stacksize < THREAD_MINSTACKSIZE) { 52 ret = pthread_attr_setstacksize(&attr, THREAD_MINSTACKSIZE); 53 if (ret != 0) 54 return (ISC_R_UNEXPECTED); 55 } 56#endif 57 58#if defined(PTHREAD_SCOPE_SYSTEM) && defined(NEED_PTHREAD_SCOPE_SYSTEM) 59 ret = pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM); 60 if (ret != 0) 61 return (ISC_R_UNEXPECTED); 62#endif 63 64 ret = pthread_create(thread, &attr, func, arg); 65 if (ret != 0) 66 return (ISC_R_UNEXPECTED); 67 68 pthread_attr_destroy(&attr); 69 70 return (ISC_R_SUCCESS); 71} 72 73void 74isc_thread_setconcurrency(unsigned int level) { 75#if defined(CALL_PTHREAD_SETCONCURRENCY) 76 (void)pthread_setconcurrency(level); 77#else 78 UNUSED(level); 79#endif 80} 81 82void 83isc_thread_yield(void) { 84#if defined(HAVE_SCHED_YIELD) 85 sched_yield(); 86#elif defined( HAVE_PTHREAD_YIELD) 87 pthread_yield(); 88#elif defined( HAVE_PTHREAD_YIELD_NP) 89 pthread_yield_np(); 90#endif 91} 92