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/*
* pthread_attr_init.c
*
* Description:
* This translation unit implements operations on thread attribute objects.
*
* --------------------------------------------------------------------------
*
* Pthreads4w - POSIX Threads Library for Win32
* Copyright(C) 1998 John E. Bossom
* Copyright(C) 1999-2018, Pthreads4w contributors
*
* Homepage: https://sourceforge.net/projects/pthreads4w/
*
* The current list of contributors is contained
* in the file CONTRIBUTORS included with the source
* code distribution. The list can also be seen at the
* following World Wide Web location:
* https://sourceforge.net/p/pthreads4w/wiki/Contributors/
*
* This file is part of Pthreads4w.
*
* Pthreads4w is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Pthreads4w is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Pthreads4w. If not, see <http://www.gnu.org/licenses/>. *
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "pthread.h"
#include "implement.h"
int
pthread_attr_init (pthread_attr_t * attr)
/*
* ------------------------------------------------------
* DOCPUBLIC
* Initializes a thread attributes object with default
* attributes.
*
* PARAMETERS
* attr
* pointer to an instance of pthread_attr_t
*
*
* DESCRIPTION
* Initializes a thread attributes object with default
* attributes.
*
* NOTES:
* 1) Used to define thread attributes
*
* RESULTS
* 0 successfully initialized attr,
* ENOMEM insufficient memory for attr.
*
* ------------------------------------------------------
*/
{
pthread_attr_t attr_result;
cpu_set_t cpuset;
if (attr == NULL)
{
/* This is disallowed. */
return EINVAL;
}
attr_result = (pthread_attr_t) malloc (sizeof (*attr_result));
if (attr_result == NULL)
{
return ENOMEM;
}
#if defined(_POSIX_THREAD_ATTR_STACKSIZE)
/*
* Default to zero size. Unless changed explicitly this
* will allow Win32 to set the size to that of the
* main thread.
*/
attr_result->stacksize = 0;
#endif
#if defined(_POSIX_THREAD_ATTR_STACKADDR)
/* FIXME: Set this to something sensible when we support it. */
attr_result->stackaddr = NULL;
#endif
attr_result->detachstate = PTHREAD_CREATE_JOINABLE;
#if defined(HAVE_SIGSET_T)
memset (&(attr_result->sigmask), 0, sizeof (sigset_t));
#endif /* HAVE_SIGSET_T */
/*
* Win32 sets new threads to THREAD_PRIORITY_NORMAL and
* not to that of the parent thread. We choose to default to
* this arrangement.
*/
attr_result->param.sched_priority = THREAD_PRIORITY_NORMAL;
attr_result->inheritsched = PTHREAD_EXPLICIT_SCHED;
attr_result->contentionscope = PTHREAD_SCOPE_SYSTEM;
CPU_ZERO(&cpuset);
attr_result->cpuset = ((_sched_cpu_set_vector_*)&cpuset)->_cpuset;
attr_result->thrname = NULL;
attr_result->valid = PTW32_ATTR_VALID;
*attr = attr_result;
return 0;
}
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