engine-i386-bsdi-2.0.c
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上传日期:2007-04-14
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文件大小:6k
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MySQL数据库
开发平台:
Visual C++
- /* ==== machdep.c ============================================================
- * Copyright (c) 1993, 1994 Chris Provenzano, proven@athena.mit.edu
- *
- * Copyright (c) 1993 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 : Machine dependent functions for NetBSD on i386
- *
- * 1.00 93/08/04 proven
- * -Started coding this file.
- */
- #ifndef lint
- static const char rcsid[] = "$Id$";
- #endif
- #include <pthread.h>
- #include <sys/types.h>
- #include <sys/socket.h>
- #include <stdlib.h>
- #include <fcntl.h>
- #include <stdio.h>
- /* ==========================================================================
- * machdep_save_state()
- */
- int machdep_save_state(void)
- {
- return(_setjmp(pthread_run->machdep_data.machdep_state));
- }
- /* ==========================================================================
- * machdep_save_state()
- */
- int machdep_save_float_state(struct pthread * pthread)
- {
- char * fdata = (char *)pthread->machdep_data.machdep_float_state;
- __asm__ ("fsave %0"::"m" (*fdata));
- }
- /* ==========================================================================
- * machdep_restore_state()
- */
- void machdep_restore_state(void)
- {
- _longjmp(pthread_run->machdep_data.machdep_state, 1);
- }
- /* ==========================================================================
- * machdep_restore_float_state()
- */
- int machdep_restore_float_state(void)
- {
- char * fdata = (char *)pthread_run->machdep_data.machdep_float_state;
- __asm__ ("frstor %0"::"m" (*fdata));
- }
- /* ==========================================================================
- * machdep_set_thread_timer()
- */
- void machdep_set_thread_timer(struct machdep_pthread *machdep_pthread)
- {
- if (setitimer(ITIMER_VIRTUAL, &(machdep_pthread->machdep_timer), NULL)) {
- PANIC();
- }
- }
- /* ==========================================================================
- * machdep_unset_thread_timer()
- */
- void machdep_unset_thread_timer(struct machdep_pthread *machdep_pthread)
- {
- struct itimerval zeroval = { { 0, 0 }, { 0, 0 } };
- int ret;
- if (machdep_pthread) {
- ret = setitimer(ITIMER_VIRTUAL, &zeroval,
- &(machdep_pthread->machdep_timer));
- } else {
- ret = setitimer(ITIMER_VIRTUAL, &zeroval, NULL);
- }
- if (ret) {
- PANIC();
- }
- }
- /* ==========================================================================
- * machdep_pthread_cleanup()
- */
- void *machdep_pthread_cleanup(struct machdep_pthread *machdep_pthread)
- {
- return(machdep_pthread->machdep_stack);
- }
- /* ==========================================================================
- * machdep_pthread_start()
- */
- void machdep_pthread_start(void)
- {
- context_switch_done();
- pthread_sched_resume();
- /* Run current threads start routine with argument */
- pthread_exit(pthread_run->machdep_data.start_routine
- (pthread_run->machdep_data.start_argument));
- /* should never reach here */
- PANIC();
- }
- /* ==========================================================================
- * __machdep_stack_free()
- */
- void __machdep_stack_free(void * stack)
- {
- free(stack);
- }
- /* ==========================================================================
- * __machdep_stack_alloc()
- */
- void * __machdep_stack_alloc(size_t size)
- {
- void * stack;
- return(malloc(size));
- }
- /* ==========================================================================
- * __machdep_pthread_create()
- */
- void __machdep_pthread_create(struct machdep_pthread *machdep_pthread,
- void *(* start_routine)(), void *start_argument,
- long stack_size, long nsec, long flags)
- {
- machdep_pthread->start_routine = start_routine;
- machdep_pthread->start_argument = start_argument;
- machdep_pthread->machdep_timer.it_value.tv_sec = 0;
- machdep_pthread->machdep_timer.it_interval.tv_sec = 0;
- machdep_pthread->machdep_timer.it_interval.tv_usec = 0;
- machdep_pthread->machdep_timer.it_value.tv_usec = nsec / 1000;
- _setjmp(machdep_pthread->machdep_state);
- /*
- * Set up new stact frame so that it looks like it
- * returned from a longjmp() to the beginning of
- * machdep_pthread_start().
- */
- machdep_pthread->machdep_state[0] = (int)machdep_pthread_start;
- /* Stack starts high and builds down. */
- machdep_pthread->machdep_state[2] =
- (int)machdep_pthread->machdep_stack + stack_size;
- }
- /* ==========================================================================
- * machdep_sys_creat()
- */
- machdep_sys_creat(char * path, int mode)
- {
- return(machdep_sys_open(path, O_WRONLY | O_CREAT | O_TRUNC, mode));
- }
- /* ==========================================================================
- * machdep_sys_wait3()
- */
- machdep_sys_wait3(int * b, int c, int * d)
- {
- return(machdep_sys_wait4(0, b, c, d));
- }
- /* ==========================================================================
- * machdep_sys_waitpid()
- */
- machdep_sys_waitpid(int a, int * b, int c)
- {
- return(machdep_sys_wait4(a, b, c, NULL));
- }