/* FIXME: that's a poor man's implementation: we should take the message exchanges into account */
static void action_barrier(const char *const *action)
{
static smx_mutex_t mutex = NULL;
static smx_cond_t cond = NULL;
static int processes_arrived_sofar = 0;
if (mutex == NULL) { // first arriving on the barrier
mutex = simcall_mutex_init();
cond = simcall_cond_init();
processes_arrived_sofar = 0;
}
ACT_DEBUG("Entering barrier: %s (%d already there)", NAME,
processes_arrived_sofar);
simcall_mutex_lock(mutex);
if (++processes_arrived_sofar == communicator_size) {
simcall_cond_broadcast(cond);
simcall_mutex_unlock(mutex);
} else {
simcall_cond_wait(cond, mutex);
simcall_mutex_unlock(mutex);
}
ACT_DEBUG("Exiting barrier: %s", NAME);
processes_arrived_sofar--;
if (!processes_arrived_sofar) {
simcall_cond_destroy(cond);
simcall_mutex_destroy(mutex);
mutex = NULL;
}
}
/** @brief Blocks the calling actor until the mutex can be obtained */
void Mutex::lock()
{
simcall_mutex_lock(mutex_);
}
void xbt_mutex_acquire(xbt_mutex_t mutex)
{
simcall_mutex_lock((smx_mutex_t) mutex);
}