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#include "thread.h"
#ifdef __sgi
#include <stdlib.h>
#include <stdio.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/prctl.h>
#include <ulocks.h>
static usptr_t *shared_arena;
static int exit_status;
static int do_exit;
static int exiting;
#endif
#ifdef sun
#include <lwp/lwp.h>
#include <lwp/stackdep.h>
#define STACKSIZE 16000 /* stacksize for a thread */
#define NSTACKS 2 /* # stacks to be put in cache initialy */
struct lock {
int lock_locked;
cv_t lock_condvar;
mon_t lock_monitor;
};
#endif
#ifdef C_THREADS
#include <cthreads.h>
#endif
#ifdef __STDC__
#define _P(args) args
#define _P0() (void)
#define _P1(v,t) (t)
#define _P2(v1,t1,v2,t2) (t1,t2)
#else
#define _P(args) ()
#define _P0() ()
#define _P1(v,t) (v) t;
#define _P2(v1,t1,v2,t2) (v1,v2) t1; t2;
#endif
static int initialized;
int start_new_thread _P2(func, void (*func) _P((void *)), arg, void *arg)
{
#ifdef sun
thread_t tid;
#endif
#ifdef DEBUG
printf("start_new_thread called\n");
#endif
if (!initialized)
init_thread();
#ifdef __sgi
if (sproc(func, PR_SALL, arg) < 0)
return 0;
return 1;
#endif
#ifdef SOLARIS
(void) thread_create(0, 0, func, arg, THREAD_NEW_LWP);
#endif
#ifdef sun
if (lwp_create(&tid, func, MINPRIO, 0, lwp_newstk(), 1, arg) < 0)
return 0;
return 1;
#endif
#ifdef C_THREADS
(void) cthread_fork(func, arg);
#endif
}
#ifdef __sgi
void maybe_exit _P0()
{
if (exiting)
return;
exit_prog(0);
}
#endif
void exit_thread _P0()
{
#ifdef DEBUG
printf("exit_thread called\n");
#endif
if (!initialized)
exit(0);
#ifdef __sgi
exiting = 1;
_exit(0);
#endif
#ifdef SOLARIS
thread_exit();
#endif
#ifdef sun
lwp_destroy(SELF);
#endif
#ifdef C_THREADS
cthread_exit(0);
#endif
}
#ifdef __sgi
static void exit_sig _P0()
{
#ifdef DEBUG
printf("exit_sig called\n");
#endif
if (do_exit) {
#ifdef DEBUG
printf("exiting in exit_sig\n");
#endif
_exit(exit_status);
}
}
#endif
void init_thread _P0()
{
#ifdef __sgi
struct sigaction s;
#endif
#ifdef DEBUG
printf("init_thread called\n");
#endif
initialized = 1;
#ifdef __sgi
atexit(maybe_exit);
s.sa_handler = exit_sig;
sigemptyset(&s.sa_mask);
sigaddset(&s.sa_mask, SIGUSR1);
s.sa_flags = 0;
sigaction(SIGUSR1, &s, 0);
prctl(PR_SETEXITSIG, SIGUSR1);
usconfig(CONF_ARENATYPE, US_SHAREDONLY);
/*usconfig(CONF_LOCKTYPE, US_DEBUGPLUS);*/
shared_arena = usinit(tmpnam(0));
#endif
#ifdef sun
lwp_setstkcache(STACKSIZE, NSTACKS);
#endif
#ifdef C_THREADS
cthread_init();
#endif
}
type_lock allocate_lock _P0()
{
#ifdef __sgi
ulock_t lock;
#endif
#ifdef sun
struct lock *lock;
extern char *malloc();
#endif
#ifdef DEBUG
printf("allocate_lock called\n");
#endif
if (!initialized)
init_thread();
#ifdef __sgi
lock = usnewlock(shared_arena);
(void) usinitlock(lock);
#endif
#ifdef sun
lock = (struct lock *) malloc(sizeof(struct lock));
lock->lock_locked = 0;
(void) mon_create(&lock->lock_monitor);
(void) cv_create(&lock->lock_condvar, lock->lock_monitor);
#endif
#ifdef DEBUG
printf("allocate_lock() -> %lx\n", (long)lock);
#endif
return (type_lock) lock;
}
void free_lock _P1(lock, type_lock lock)
{
#ifdef DEBUG
printf("free_lock(%lx) called\n", (long)lock);
#endif
#ifdef __sgi
usfreelock((ulock_t) lock, shared_arena);
#endif
#ifdef sun
mon_destroy(((struct lock *) lock)->lock_monitor);
free((char *) lock);
#endif
}
int acquire_lock _P2(lock, type_lock lock, waitflag, int waitflag)
{
int success;
#ifdef DEBUG
printf("acquire_lock(%lx, %d) called\n", (long)lock, waitflag);
#endif
#ifdef __sgi
if (waitflag)
success = ussetlock((ulock_t) lock);
else
success = uscsetlock((ulock_t) lock, 1); /* Try it once */
#endif
#ifdef sun
success = 0;
(void) mon_enter(((struct lock *) lock)->lock_monitor);
if (waitflag)
while (((struct lock *) lock)->lock_locked)
cv_wait(((struct lock *) lock)->lock_condvar);
if (!((struct lock *) lock)->lock_locked) {
success = 1;
((struct lock *) lock)->lock_locked = 1;
}
cv_broadcast(((struct lock *) lock)->lock_condvar);
mon_exit(((struct lock *) lock)->lock_monitor);
#endif
#ifdef DEBUG
printf("acquire_lock(%lx, %d) -> %d\n", (long)lock, waitflag, success);
#endif
return success;
}
void release_lock _P1(lock, type_lock lock)
{
#ifdef DEBUG
printf("release lock(%lx) called\n", (long)lock);
#endif
#ifdef __sgi
(void) usunsetlock((ulock_t) lock);
#endif
#ifdef sun
(void) mon_enter(((struct lock *) lock)->lock_monitor);
((struct lock *) lock)->lock_locked = 0;
cv_broadcast(((struct lock *) lock)->lock_condvar);
mon_exit(((struct lock *) lock)->lock_monitor);
#endif
}
void exit_prog _P1(status, int status)
{
#ifdef DEBUG
printf("exit_prog(%d) called\n", status);
#endif
if (!initialized)
exit(status);
#ifdef __sgi
exiting = 1;
do_exit = 1;
exit_status = status;
_exit(status);
#endif
#ifdef sun
pod_exit(status);
#endif
}
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