/*------------------------------------------------------------------------
* screate -- create and initialize a semaphore, returning its id
*------------------------------------------------------------------------
*/
SYSCALL screate(int count)
{
// added for PA0 tracing
int start_time;
int curridx = 15;
if(syscall_trace_on == 1) {
syscall_used[currpid] = 1;
syscall_cnt[currpid][curridx]++;
start_time = ctr1000;
}
STATWORD ps;
int sem;
disable(ps);
if ( count<0 || (sem=newsem())==SYSERR ) {
restore(ps);
// added for PA0 tracing
if(syscall_trace_on == 1) {
syscall_time[currpid][curridx] += ctr1000 - start_time;
}
return(SYSERR);
}
semaph[sem].semcnt = count;
/* sqhead and sqtail were initialized at system startup */
restore(ps);
// added for PA0 tracing
if(syscall_trace_on == 1) {
syscall_time[currpid][curridx] += ctr1000 - start_time;
}
return(sem);
}
/* initial count (>=0) */
SYSCALL Kscreate(int *ERRNO, int count)
{
int sem;
disableps();
if (count < 0 || (sem=newsem()) == SYSERR) {
enableps();
*ERRNO = ENOMEM;
return SYSERR;
}
_semaph[sem].semcnt = count;
enableps();
return sem;
}
sid32 semcreate(int32 count)
{
intmask mask;
sid32 sem;
mask = disable();
if(count<0 || (sem=newsem())==SYSERR)
{
restore(mask);
return SYSERR;
}
semtab[sem].secount = count;
restore(mask);
return sem;
}
/*------------------------------------------------------------------------
* semcreate - Create a new semaphore and return the ID to the caller
*------------------------------------------------------------------------
*/
sid32 semcreate(
int32 count /* Initial semaphore count */
)
{
intmask mask; /* Saved interrupt mask */
sid32 sem; /* Semaphore ID to return */
mask = disable();
if (count < 0 || ((sem=newsem())==SYSERR)) {
restore(mask);
return SYSERR;
}
semtab[sem].scount = count; /* Initialize table entry */
restore(mask);
return sem;
}
