/**
* Notify a single thread waiting on a monitor.
*
* A thread is considered to be waiting on the monitor if
* it is currently blocked while executing hythread_monitor_wait on the monitor.
*
* If no threads are waiting, no action is taken.
*
* @param[in] mon_ptr a monitor to be signaled
* @return 0 once the monitor has been signaled<br>HYTHREAD_ILLEGAL_MONITOR_STATE if the current thread does not own the monitor
*
* @see hythread_monitor_notify_all, hythread_monitor_enter, hythread_monitor_wait
*/
IDATA VMCALL hythread_monitor_notify(hythread_monitor_t mon_ptr) {
if (mon_ptr->owner != tm_self_tls) {
return TM_ERROR_ILLEGAL_STATE;
}
if (mon_ptr->notify_count < mon_ptr->wait_count)
mon_ptr->notify_count++;
return hycond_notify(&mon_ptr->condition);
}
/*
* Exit locktable write section
*/
static void locktable_writer_exit() {
IDATA status = port_mutex_lock(&lock_table->mutex);
assert(status == TM_ERROR_NONE);
if (lock_table->readers_reading > 0) {
lock_table->readers_reading = lock_table->readers_waiting;
lock_table->readers_waiting = 0;
lock_table->state = HYTHREAD_LOCKTABLE_READING;
hycond_notify_all(&lock_table->read);
} else if (lock_table->writers_waiting > 0) {
hycond_notify(&lock_table->write);
} else {
lock_table->state = HYTHREAD_LOCKTABLE_IDLE;
}
status = port_mutex_unlock(&lock_table->mutex);
assert(status == TM_ERROR_NONE);
}
