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#if SunOS4_1
#include "eus.h"
/* thread function for SunOS 4.1.x added by H.Nakagaki */
thread_t thread_table[MAXTHREAD];
int thr_self()
{
int i;
thread_t tid;
lwp_self(&tid);
for(i=0;(i<MAXTHREAD)&&(thread_table[i].thread_key != tid.thread_key);i++);
return(i);
}
int thr_getprio(int tid, int *prio)
{
int stat;
statvec_t prio_vec;
stat=lwp_getstate(thread_table[tid], &prio_vec);
*prio = prio_vec.stat_prio;
return(stat);
}
int thr_setprio(int tid, int prio)
{
return( lwp_setpri(thread_table[tid], prio));
}
int thr_create(void *base, size_t size, void (*func)(), void *args, long flags, int *tid)
{ int i, stat;
for(i=0;(i<MAXTHREAD)&&(thread_table[i].thread_key >=0 );i++);
/* lwp_setstkcache(size, 1);*/
stat = lwp_create( &thread_table[i], func, MINPRIO, flags, lwp_newstk(), 1, args);
*tid = i;
return(stat);
}
int thr_continue(int tid)
{
return( lwp_resume(thread_table[tid]) );
}
int thr_suspend(int tid)
{
return( lwp_suspend(thread_table[tid] ));
}
int thr_kill(int tid, int sig)
{
int stat;
stat = lwp_destroy(thread_table[tid]);
thread_table[tid].thread_key = -1;
return(stat);
}
/* readers/writer lock function for SunOS 4.1.x added by H.Nakagaki */
int rwlock_init(rwlock_t *rw, int c, void *d)
{
mutex_init(&(rw->lock), 0, 0);
cond_init(&(rw->r_cond), &(rw->lock));
cond_init(&(rw->w_cond), &(rw->lock));
rw->readers = 0;
}
int rwlock_destroy(rwlock_t *rw)
{
mutex_destroy(&(rw->lock));
cond_destroy(&(rw->r_cond));
cond_destroy(&(rw->w_cond));
}
int rw_rdlock(rwlock_t *rw)
{
mutex_lock(&(rw->lock));
while (rw->readers == -1)
cond_wait(&(rw->r_cond), 0);
rw->readers++;
mutex_unlock(&(rw->lock));
}
int rw_wrlock(rwlock_t *rw)
{
mutex_lock(&(rw->lock));
while (rw->readers != 0)
cond_wait(&(rw->w_cond), 0);
rw->readers=-1;
mutex_unlock(&(rw->lock));
}
int rw_unlock(rwlock_t *rw)
{
mutex_lock(&(rw->lock));
if (rw->readers == -1)
rw->readers = 0;
else
rw->readers--;
cond_broadcast(&(rw->w_cond));
cond_broadcast(&(rw->r_cond));
mutex_unlock(&(rw->lock));
}
/* semaphore function for SunOS 4.1.x added by H.Nakagaki */
int sema_init(sema_t *sem, unsigned int c, int d, void *e)
{
mutex_init(&(sem->lock), 0, 0 );
cond_init(&(sem->cond), &(sem->lock));
sem->count = c;
}
int sema_destroy(sema_t *sem)
{
mutex_destroy(&(sem->lock));
cond_destroy(&(sem->cond));
}
int sema_wait(sema_t *sem)
{
mutex_lock(&(sem->lock));
while (sem->count == 0){
cond_wait(&(sem->cond), &(sem->lock));}
sem->count--;
mutex_unlock(&(sem->lock));
}
int sema_trywait(sema_t *sem)
{
int ret;
mutex_lock(&(sem->lock));
if (sem->count == 0)
ret = EBUSY;
else{
sem->count--;
ret = 0;
}
mutex_unlock(&(sem->lock));
return (ret);
}
int sema_post(sema_t *sem)
{
mutex_lock(&(sem->lock));
sem->count++;
cond_broadcast(&(sem->cond));
mutex_unlock(&(sem->lock));
}
/* Multi thread scheduler for SunOS 4.1.x. */
void scheduler()
{
struct timeval quantum;
quantum.tv_sec = 0;
quantum.tv_usec = 10000;
for(;;){
lwp_sleep(&quantum);
lwp_resched(MINPRIO);
}
}
void mthread_init( context *mainctx )
{
int i;
for(i=0;i<MAXTHREAD;i++)
thread_table[i].thread_key = -1;
lwp_self(&thread_table[0]);
mutex_init(&mark_lock, USYNC_THREAD, 0);
mutex_init(&p_mark_lock, USYNC_THREAD, 0);
mutex_init(&alloc_lock, USYNC_THREAD, 0);
mutex_init(&free_thread_lock, USYNC_THREAD, 0);
mutex_init(&qthread_lock, USYNC_THREAD, 0);
mutex_init(&qsort_lock, USYNC_THREAD, 0);
sema_init(&free_thread_sem, 0, USYNC_THREAD, 0);
rwlock_init(&gc_lock, USYNC_THREAD, 0);
pod_setmaxpri(2);
lwp_setstkcache(32*1024*4, MAXTHREAD);
lwp_create((thread_t *)0, scheduler, 2, 0, lwp_newstk(), 0);
lwp_setpri(SELF,MINPRIO);
}
#endif /* SunOS4_1 */
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