int mysem_post(mysem_t *sem){
struct sembuf myop[1];
setsembuf(myop, 0, 1, 0);
if(semop(*sem, myop, 1) == -1)
return -1;
return 0;
}
int mysem_post(mysem_t *sem){
int semid;
rewind(sem);
while(fread(&semid, sizeof(int), 1, sem) < sizeof(int));
struct sembuf myop[1];
setsembuf(myop, 0, 1, 0);
if(semop(*sem, myop, 1) == -1)
return -1;
return 0;
}
void sem_signal(int sem_id)
{
setsembuf(&buf_semsignal, 0, 1, SEM_UNDO);
r_semop(sem_id, &buf_semsignal, 1);
}
void sem_wait(int sem_id)
{
setsembuf(&buf_semwait, 0, -1, SEM_UNDO);
r_semop(sem_id, &buf_semwait, 1);
}
