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225 lines
5.5 KiB
C
225 lines
5.5 KiB
C
/* ==== machdep.c ============================================================
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* Copyright (c) 1995 Chris Provenzano, proven@athena.mit.edu
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*
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* Description : Machine dependent functions for IRIX-5.2 on the IP22
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*
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* 1.00 95/04/26 proven
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* -Started coding this file.
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*/
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#ifndef lint
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static const char rcsid[] = "$Id$";
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#endif
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#include <pthread.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdlib.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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pthread_sched_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_stack_free()
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*/
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void __machdep_stack_free(void * stack)
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{
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free(stack);
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}
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/* ==========================================================================
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* __machdep_stack_alloc()
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*/
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void * __machdep_stack_alloc(size_t size)
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{
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void * stack;
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return(malloc(size));
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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,
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long stack_size, long nsec, long flags)
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{
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int i;
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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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if (setjmp(machdep_pthread->machdep_state)) {
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machdep_pthread_start();
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}
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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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/* IP22 stack starts high and builds down. */
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machdep_pthread->machdep_state[JB_SP] =
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(int)machdep_pthread->machdep_stack + stack_size - 1024;
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machdep_pthread->machdep_state[JB_SP] &= ~7;
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memcpy((void *)machdep_pthread->machdep_state[JB_SP],
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(char *)(((int)&i) - 24), 32);
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}
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/* ==========================================================================
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* machdep_sys_dup2()
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*/
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machdep_sys_dup2(int a, int b)
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{
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machdep_sys_close(b);
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machdep_sys_fcntl(a, F_DUPFD, b);
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}
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/* ==========================================================================
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* machdep_sys_wait3()
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*/
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machdep_sys_wait3(int * b, int c, int * d)
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{
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return(machdep_sys_waitsys(0, b, c, d));
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}
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/* ==========================================================================
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* machdep_sys_waitpid()
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*/
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machdep_sys_waitpid(int a, int * b, int c)
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{
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return(machdep_sys_waitsys(a, b, c, NULL));
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}
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struct stat;
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/* ==========================================================================
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* _fxstat()
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*/
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int _fxstat(int __ver, int fd, struct stat *buf)
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{
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int ret;
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if ((ret = fd_lock(fd, FD_READ, NULL)) == OK) {
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if ((ret = machdep_sys_fstat(fd_table[fd]->fd.i, buf)) < OK) {
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SET_ERRNO(-ret);
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}
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fd_unlock(fd, FD_READ);
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}
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return(ret);
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}
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/* ==========================================================================
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* _lxstat()
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*/
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int _lxstat(int __ver, const char * path, struct stat * buf)
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{
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int ret;
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if ((ret = machdep_sys_lstat(path, buf)) < OK) {
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SET_ERRNO(-ret);
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}
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return(ret);
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}
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/* ==========================================================================
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* _xstat()
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*/
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int _xstat(int __ver, const char * path, struct stat * buf)
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{
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int ret;
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if ((ret = machdep_sys_stat(path, buf)) < OK) {
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SET_ERRNO(-ret);
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}
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return(ret);
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}
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/* ==========================================================================
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* getdtablesize()
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*/
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machdep_sys_getdtablesize()
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{
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return(sysconf(_SC_OPEN_MAX));
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}
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/* ==========================================================================
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* machdep_sys_getdirentries()
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*/
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int machdep_sys_getdirentries(int fd, char * buf, int len, int * seek)
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{
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int i;
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i = machdep_sys_getdents(fd, buf, len);
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return i;
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}
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