131 lines
4.6 KiB
C
131 lines
4.6 KiB
C
/* ==== machdep.c ============================================================
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* Copyright (c) 1993 by Chris Provenzano, proven@mit.edu
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Chris Provenzano.
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* 4. The name of Chris Provenzano may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL CHRIS PROVENZANO BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Description : Machine dependent functions for NetBSD on i386
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*
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* 1.00 93/08/04 proven
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* -Started coding this file.
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*/
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#include "pthread.h"
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/* ==========================================================================
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* machdep_save_state()
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*/
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int machdep_save_state(void)
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{
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return(_setjmp(pthread_run->machdep_data.machdep_state));
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}
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/* ==========================================================================
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* machdep_restore_state()
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*/
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void machdep_restore_state(void)
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{
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_longjmp(pthread_run->machdep_data.machdep_state, 1);
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}
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/* ==========================================================================
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* machdep_set_thread_timer()
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*/
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void machdep_set_thread_timer(struct machdep_pthread *machdep_pthread)
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{
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if (setitimer(ITIMER_VIRTUAL, &(machdep_pthread->machdep_timer), NULL)) {
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PANIC();
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}
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}
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/* ==========================================================================
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* machdep_unset_thread_timer()
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*/
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void machdep_unset_thread_timer(struct machdep_pthread *machdep_pthread)
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{
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struct itimerval zeroval = { { 0, 0 }, { 0, 0} };
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if (setitimer(ITIMER_VIRTUAL, &zeroval, NULL)) {
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PANIC();
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}
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}
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/* ==========================================================================
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* machdep_pthread_cleanup()
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*/
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void *machdep_pthread_cleanup(struct machdep_pthread *machdep_pthread)
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{
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return(machdep_pthread->machdep_stack);
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}
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/* ==========================================================================
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* machdep_pthread_start()
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*/
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void machdep_pthread_start(void)
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{
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context_switch_done();
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sig_check_and_resume();
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/* Run current threads start routine with argument */
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pthread_exit(pthread_run->machdep_data.start_routine
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(pthread_run->machdep_data.start_argument));
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/* should never reach here */
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PANIC();
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}
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/* ==========================================================================
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* machdep_pthread_create()
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*/
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void machdep_pthread_create(struct machdep_pthread *machdep_pthread,
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void *(* start_routine)(), void *start_argument, long stack_size,
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void *stack_start, long nsec)
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{
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machdep_pthread->machdep_stack = stack_start;
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machdep_pthread->start_routine = start_routine;
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machdep_pthread->start_argument = start_argument;
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machdep_pthread->machdep_timer.it_value.tv_sec = 0;
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machdep_pthread->machdep_timer.it_interval.tv_sec = 0;
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machdep_pthread->machdep_timer.it_interval.tv_usec = 0;
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machdep_pthread->machdep_timer.it_value.tv_usec = nsec / 1000;
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_setjmp(machdep_pthread->machdep_state);
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/*
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* Set up new stact frame so that it looks like it
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* returned from a longjmp() to the beginning of
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* machdep_pthread_start().
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*/
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machdep_pthread->machdep_state[0] = (int)machdep_pthread_start;
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/* Stack starts high and builds down. */
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machdep_pthread->machdep_state[2] =
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(int)machdep_pthread->machdep_stack + stack_size;
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}
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