diff options
Diffstat (limited to 'mit-pthreads/machdep/engine-r2000-ultrix-4.2.c')
| -rw-r--r-- | mit-pthreads/machdep/engine-r2000-ultrix-4.2.c | 209 |
1 files changed, 0 insertions, 209 deletions
diff --git a/mit-pthreads/machdep/engine-r2000-ultrix-4.2.c b/mit-pthreads/machdep/engine-r2000-ultrix-4.2.c deleted file mode 100644 index 45c8cc73f24..00000000000 --- a/mit-pthreads/machdep/engine-r2000-ultrix-4.2.c +++ /dev/null @@ -1,209 +0,0 @@ -/* ==== machdep.c ============================================================ - * Copyright (c) 1993 Chris Provenzano, proven@athena.mit.edu - * - * Description : Machine dependent functions for decstation with r2000/r3000 - * - * 1.00 93/07/21 proven - * -Started coding this file. - */ - -#ifndef lint -static const char rcsid[] = "$Id$"; -#endif - -#include <pthread.h> -#include <stdlib.h> -#include <errno.h> - -/* - * The r2000/r3000 processors do not have a test and set instruction, so - * the semaphore TEST_AND_SET macro is linked very closely to the interrupt - * handelling of the pthreads package. - */ - -/* ========================================================================== - * semaphore_test_and_set() - * - * SEMAPHORE_TEST_AND_SET prevents interrupts, tests the lock and then - * turns interrupts back on, checking to see if any interrupts have occured - * between the prevent and resume. - */ -int semaphore_test_and_set(semaphore *lock) -{ - int rval; - -/* None of this should be necessary - sig_prevent(); - if (!(rval = (*lock))) { - *lock = SEMAPHORE_SET; - } - sig_check_and_resume(); - return(rval); -*/ -} - -/* ========================================================================== - * machdep_save_state() - */ -int machdep_save_state(void) -{ - return(setjmp(pthread_run->machdep_data.machdep_state)); -} - -/* ========================================================================== - * machdep_save_float_state() - */ -void machdep_save_float_state(struct pthread * pthread) -{ - return; -} - -/* ========================================================================== - * fake_longjmp() - */ -void fake_longjmp(jmp_buf env) -{ - asm("li $5,1; sw $5, 20($4); li $2,103; syscall"); -} - -/* ========================================================================== - * machdep_restore_state() - * - * When I redo machdep_save_state, I'll put the asm in machdep_save_state() - * and machdep_restore_state() and I won't have to do an additional function - * call. - */ -void machdep_restore_state(void) -{ - fake_longjmp(pthread_run->machdep_data.machdep_state); - /* longjmp(pthread_run->machdep_data.machdep_state, 1); */ -} - -/* ========================================================================== - * machdep_restore_float_state() - */ -void machdep_restore_float_state(void) -{ - return; -} - -/* ========================================================================== - * 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} }; - - if (setitimer(ITIMER_VIRTUAL, &zeroval, NULL)) { - 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[JB_RA] = (int)machdep_pthread_start; - machdep_pthread->machdep_state[JB_PC] = (int)machdep_pthread_start; - - /* Stack starts high and builds down. */ - machdep_pthread->machdep_state[JB_SP] = - (int)machdep_pthread->machdep_stack + stack_size; - - /* This is the real global pointer */ - /* machdep_pthread->machdep_state[JB_GP] = 0; */ -} - -/* ========================================================================== - * machdep_sys_sigprocmask() - * This isn't a real implementation; we can make the assumption that the - * pthreads library is not using oset, and that it is always blocking or - * unblocking all signals at once. - */ -int machdep_sys_sigprocmask(int how, const sigset_t *set, sigset_t *oset) -{ - switch(how) { - case SIG_BLOCK: - sigblock(*set); - break; - case SIG_UNBLOCK: - sigsetmask(~*set); - break; - case SIG_SETMASK: - sigsetmask(*set); - break; - default: - return -EINVAL; - } - return(OK); -} - |