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/* ==== pthread_init.c ========================================================
* Copyright (c) 1993, 1994 by Chris Provenzano, proven@mit.edu
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Chris Provenzano.
* 4. The name of Chris Provenzano may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL CHRIS PROVENZANO BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Description : Pthread_init routine.
*
* 1.00 94/09/20 proven
* -Started coding this file.
*/
#ifndef lint
static const char rcsid[] = "$Id$";
#endif
#include <pthread.h>
#include <stdlib.h>
#include <string.h>
/*
* errno is declared here to prevent the linker from pulling in errno
* from the C library (and whatever else is in that file). I also use
* errno as the default location for error numbers for the initial thread
* giving some backwards compatibility.
*/
#ifdef errno
#undef errno
#endif
#if !defined(M_UNIX)
int errno;
#else
extern int errno;
#endif
/* ==========================================================================
* pthread_init()
*
* We use features of the C++ linker to make sure this function is called
* before anything else is done in the program. See init.cc.
*/
void pthread_init(void)
{
struct machdep_pthread machdep_data = MACHDEP_PTHREAD_INIT;
/* Only call this once */
if (pthread_initial) {
return;
}
pthread_pagesize = getpagesize();
/* Initialize the first thread */
if ((pthread_initial = (pthread_t)malloc(sizeof(struct pthread))) &&
(pthread_current_prio_queue = (struct pthread_prio_queue *)
malloc(sizeof(struct pthread_prio_queue)))) {
memcpy(&(pthread_initial->machdep_data), &machdep_data,
sizeof(machdep_data));
memcpy(&pthread_initial->attr, &pthread_attr_default,
sizeof(pthread_attr_t));
pthread_initial->pthread_priority = PTHREAD_DEFAULT_PRIORITY;
pthread_initial->state = PS_RUNNING;
pthread_queue_init(&(pthread_initial->join_queue));
pthread_initial->specific_data = NULL;
pthread_initial->specific_data_count = 0;
pthread_initial->cleanup = NULL;
pthread_initial->queue = NULL;
pthread_initial->next = NULL;
pthread_initial->flags = 0;
pthread_initial->pll = NULL;
pthread_initial->sll = NULL;
/* PTHREADS spec says we start with cancellability on and deferred */
SET_PF_CANCEL_STATE(pthread_initial, PTHREAD_CANCEL_ENABLE);
SET_PF_CANCEL_TYPE(pthread_initial, PTHREAD_CANCEL_DEFERRED);
/* Ugly errno hack */
pthread_initial->error_p = &errno;
pthread_initial->error = 0;
pthread_prio_queue_init(pthread_current_prio_queue);
pthread_link_list = pthread_initial;
pthread_run = pthread_initial;
uthread_sigmask = &(pthread_run->sigmask);
/* XXX can I assume the mask and pending siganl sets are empty. */
sigemptyset(&(pthread_initial->sigpending));
sigemptyset(&(pthread_initial->sigmask));
pthread_initial->sigcount = 0;
/* Initialize the signal handler. */
sig_init();
/* Initialize the fd table. */
fd_init();
/* Start the scheduler */
machdep_set_thread_timer(&(pthread_run->machdep_data));
#ifdef M_UNIX
machdep_sys_init();
#endif
return;
}
PANIC();
}
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