/**
* \brief Signalizes a condition.
*
* Signalizes a condition and wakes up a sleeping process.
* If there are no process sleeping, no action is done.
* \param cond A condition
*/
void SIMIX_cond_signal(smx_cond_t cond)
{
XBT_IN("(%p)",cond);
smx_process_t proc = NULL;
smx_mutex_t mutex = NULL;
smx_simcall_t simcall = NULL;
XBT_DEBUG("Signal condition %p", cond);
/* If there are processes waiting for the condition choose one and try
to make it acquire the mutex */
if ((proc = xbt_swag_extract(cond->sleeping))) {
/* Destroy waiter's synchro action */
SIMIX_synchro_destroy(proc->waiting_action);
proc->waiting_action = NULL;
/* Now transform the cond wait simcall into a mutex lock one */
simcall = &proc->simcall;
if(simcall->call == SIMCALL_COND_WAIT)
mutex = simcall_cond_wait__get__mutex(simcall);
else
mutex = simcall_cond_wait_timeout__get__mutex(simcall);
simcall->call = SIMCALL_MUTEX_LOCK;
SIMIX_pre_mutex_lock(simcall, mutex);
}
XBT_OUT();
}
/**
* \brief Signalizes a condition.
*
* Signalizes a condition and wakes up a sleeping process.
* If there are no process sleeping, no action is done.
* \param cond A condition
*/
void SIMIX_cond_signal(smx_cond_t cond)
{
XBT_IN("(%p)",cond);
smx_actor_t proc = nullptr;
smx_mutex_t mutex = nullptr;
smx_simcall_t simcall = nullptr;
XBT_DEBUG("Signal condition %p", cond);
/* If there are processes waiting for the condition choose one and try
to make it acquire the mutex */
if ((proc = (smx_actor_t) xbt_swag_extract(cond->sleeping))) {
/* Destroy waiter's synchronization */
delete proc->waiting_synchro;
proc->waiting_synchro = nullptr;
/* Now transform the cond wait simcall into a mutex lock one */
simcall = &proc->simcall;
if(simcall->call == SIMCALL_COND_WAIT)
mutex = simcall_cond_wait__get__mutex(simcall);
else
mutex = simcall_cond_wait_timeout__get__mutex(simcall);
simcall->call = SIMCALL_MUTEX_LOCK;
simcall_HANDLER_mutex_lock(simcall, mutex);
}
XBT_OUT();
}
