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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: thread.c,v 1.7 2019/12/17 01:46:36 sthen Exp $ */
/*! \file */
#include <config.h>
#if defined(HAVE_SCHED_H)
#include <sched.h>
#endif
#include <isc/thread.h>
#include <isc/util.h>
#ifndef THREAD_MINSTACKSIZE
#define THREAD_MINSTACKSIZE (1024U * 1024)
#endif
isc_result_t
isc_thread_create(isc_threadfunc_t func, isc_threadarg_t arg,
isc_thread_t *thread)
{
pthread_attr_t attr;
#if defined(HAVE_PTHREAD_ATTR_GETSTACKSIZE) && \
defined(HAVE_PTHREAD_ATTR_SETSTACKSIZE)
size_t stacksize;
#endif
int ret;
pthread_attr_init(&attr);
#if defined(HAVE_PTHREAD_ATTR_GETSTACKSIZE) && \
defined(HAVE_PTHREAD_ATTR_SETSTACKSIZE)
ret = pthread_attr_getstacksize(&attr, &stacksize);
if (ret != 0)
return (ISC_R_UNEXPECTED);
if (stacksize < THREAD_MINSTACKSIZE) {
ret = pthread_attr_setstacksize(&attr, THREAD_MINSTACKSIZE);
if (ret != 0)
return (ISC_R_UNEXPECTED);
}
#endif
#if defined(PTHREAD_SCOPE_SYSTEM) && defined(NEED_PTHREAD_SCOPE_SYSTEM)
ret = pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM);
if (ret != 0)
return (ISC_R_UNEXPECTED);
#endif
ret = pthread_create(thread, &attr, func, arg);
if (ret != 0)
return (ISC_R_UNEXPECTED);
pthread_attr_destroy(&attr);
return (ISC_R_SUCCESS);
}
void
isc_thread_setconcurrency(unsigned int level) {
#if defined(CALL_PTHREAD_SETCONCURRENCY)
(void)pthread_setconcurrency(level);
#else
UNUSED(level);
#endif
}
void
isc_thread_setname(isc_thread_t thread, const char *name) {
#if defined(HAVE_PTHREAD_SETNAME_NP) && defined(_GNU_SOURCE)
/*
* macOS has pthread_setname_np but only works on the
* current thread so it's not used here
*/
(void)pthread_setname_np(thread, name);
#elif defined(HAVE_PTHREAD_SET_NAME_NP)
(void)pthread_set_name_np(thread, name);
#else
UNUSED(thread);
UNUSED(name);
#endif
}
void
isc_thread_yield(void) {
#if defined(HAVE_SCHED_YIELD)
sched_yield();
#elif defined( HAVE_PTHREAD_YIELD)
pthread_yield();
#elif defined( HAVE_PTHREAD_YIELD_NP)
pthread_yield_np();
#endif
}
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