void software_free(gpointer data) {
Software* software = data;
MAGIC_ASSERT(software);
g_string_free(software->arguments, TRUE);
g_string_free(software->pluginPath, TRUE);
MAGIC_CLEAR(software);
g_free(software);
}
void scheduler_unref(Scheduler* scheduler) {
MAGIC_ASSERT(scheduler);
g_mutex_lock(&(scheduler->globalLock));
scheduler->referenceCount--;
gboolean shouldFree = (scheduler->referenceCount <= 0) ? TRUE : FALSE;
g_mutex_unlock(&(scheduler->globalLock));
if(shouldFree) {
_scheduler_free(scheduler);
}
}
gsize socket_getOutputBufferSpace(Socket* socket) {
MAGIC_ASSERT(socket);
utility_assert(socket->outputBufferSize >= socket->outputBufferLength);
gsize bufferSize = socket_getOutputBufferSize(socket);
if(bufferSize < socket->outputBufferLength) {
return 0;
} else {
return bufferSize - socket->outputBufferLength;
}
}
static void _address_free(Address* address) {
MAGIC_ASSERT(address);
g_free(address->ipString);
g_free(address->name);
g_free(address->idString);
MAGIC_CLEAR(address);
g_free(address);
}
gpointer engine_get(Engine* engine, EngineStorage type, GQuark id) {
MAGIC_ASSERT(engine);
/*
* Return the item corresponding to type and id in a thread-safe way.
* I believe for now no protections are necessary since our registry
* is read-only.
*/
return registry_get(engine->registry, type, &id);
}
void tracker_addVirtualProcessingDelay(Tracker* tracker, SimulationTime delay) {
MAGIC_ASSERT(tracker);
if(_tracker_getFlags(tracker) & TRACKER_FLAGS_NODE) {
(tracker->numDelayedTotal)++;
tracker->delayTimeTotal += delay;
(tracker->numDelayedLastInterval)++;
tracker->delayTimeLastInterval += delay;
}
}
void connectnetwork_run(ConnectNetworkAction* action) {
MAGIC_ASSERT(action);
internetwork_connectNetworks(worker_getInternet(),
action->sourceClusterID, action->destinationClusterID,
action->latency, action->jitter, action->packetloss,
action->latencymin, action->latencyQ1, action->latencymean,
action->latencyQ3, action->latencymax);
}
SimulationTime cpu_getDelay(CPU* cpu) {
MAGIC_ASSERT(cpu);
/* we only have delay if we've crossed the threshold */
SimulationTime builtUpDelay = cpu->timeCPUAvailable - cpu->now;
if(builtUpDelay > cpu->threshold) {
return builtUpDelay;
}
return 0;
}
void engine_put(Engine* engine, EngineStorage type, GQuark* id, gpointer item) {
MAGIC_ASSERT(engine);
/*
* put the item corresponding to type and id in a thread-safe way.
* I believe for now no protections are necessary since our registry
* is filled before simulation and is read only.
*/
registry_put(engine->registry, type, id, item);
}
static gint _host_monitorDescriptor(Host* host, Descriptor* descriptor) {
MAGIC_ASSERT(host);
/* make sure there are no collisions before inserting */
gint* handle = descriptor_getHandleReference(descriptor);
utility_assert(handle && !host_lookupDescriptor(host, *handle));
g_hash_table_replace(host->descriptors, handle, descriptor);
return *handle;
}
static gsize _tcp_getBufferSpaceOut(TCP* tcp) {
MAGIC_ASSERT(tcp);
/* account for throttled and retransmission buffer */
gssize s = (gssize)(socket_getOutputBufferSpace(&(tcp->super)) - tcp->throttledOutputLength - tcp->retransmissionLength);
gsize space = MAX(0, s);
if(space == 0) {
descriptor_adjustStatus((Descriptor*)tcp, DS_WRITABLE, FALSE);
}
return space;
}
void epoll_tryNotify(Epoll* epoll) {
MAGIC_ASSERT(epoll);
if(_epoll_isReadyToNotify(epoll)) {
application_notify(epoll->ownerApplication);
/* check if we need to be notified again */
_epoll_ensureTriggers(epoll);
}
}
static void _tcp_endOfFileSignalled(TCP* tcp) {
MAGIC_ASSERT(tcp);
debug("%s <-> %s: signaling close to user, socket no longer usable", tcp->super.boundString, tcp->super.peerString);
tcp->flags |= TCPF_EOF_SIGNALED;
/* user can no longer access socket */
descriptor_adjustStatus(&(tcp->super.super.super), DS_CLOSED, TRUE);
descriptor_adjustStatus(&(tcp->super.super.super), DS_ACTIVE, FALSE);
}
void tracker_free(Tracker* tracker) {
MAGIC_ASSERT(tracker);
g_hash_table_foreach(tracker->allocatedLocations, _tracker_freeAllocatedLocations, NULL);
g_hash_table_destroy(tracker->allocatedLocations);
g_hash_table_destroy(tracker->socketStats);
MAGIC_CLEAR(tracker);
g_free(tracker);
}
void worker_free(gpointer data) {
Worker* worker = data;
MAGIC_ASSERT(worker);
/* calls the destroy functions we specified in g_hash_table_new_full */
g_hash_table_destroy(worker->plugins);
MAGIC_CLEAR(worker);
g_free(worker);
}
void udp_processPacket(UDP* udp, Packet* packet) {
MAGIC_ASSERT(udp);
/* UDP packet contains data for user and can be buffered immediately */
if(packet_getPayloadLength(packet) > 0) {
if(!socket_addToInputBuffer((Socket*)udp, packet)) {
packet_addDeliveryStatus(packet, PDS_RCV_SOCKET_DROPPED);
}
}
}
Event* scheduler_pop(Scheduler* scheduler) {
MAGIC_ASSERT(scheduler);
/* this function should block until a non-null event is available for the worker to run.
* return NULL only to signal the worker thread to quit */
while(scheduler->isRunning) {
/* pop from a queue based on the policy */
Event* nextEvent = scheduler->policy->pop(scheduler->policy, scheduler->currentRound.endTime);
if(nextEvent != NULL) {
/* we have an event, let the worker run it */
return nextEvent;
} else if(scheduler->policyType == SP_SERIAL_GLOBAL) {
/* the running thread has no more events to execute this round, but we only have a
* single, global, serial queue, so returning NULL without blocking is OK. */
return NULL;
} else {
/* the running thread has no more events to execute this round and we need to block it
* so that we can wait for all threads to finish events from this round. We want to
* track idle times, so let's start by making sure we have timer elements in place. */
GTimer* executeEventsBarrierWaitTime = g_hash_table_lookup(scheduler->threadToWaitTimerMap, GUINT_TO_POINTER(pthread_self()));
/* wait for all other worker threads to finish their events too, and track wait time */
if(executeEventsBarrierWaitTime) {
g_timer_continue(executeEventsBarrierWaitTime);
}
countdownlatch_countDownAwait(scheduler->executeEventsBarrier);
if(executeEventsBarrierWaitTime) {
g_timer_stop(executeEventsBarrierWaitTime);
}
/* now all threads reached the current round end barrier time.
* asynchronously collect some stats that the main thread will use. */
if(scheduler->policy->getNextTime) {
SimulationTime nextTime = scheduler->policy->getNextTime(scheduler->policy);
g_mutex_lock(&(scheduler->globalLock));
scheduler->currentRound.minNextEventTime = MIN(scheduler->currentRound.minNextEventTime, nextTime);
g_mutex_unlock(&(scheduler->globalLock));
}
/* clear all log messages from the last round */
logger_flushRecords(logger_getDefault(), pthread_self());
/* wait for other threads to finish their collect step */
countdownlatch_countDownAwait(scheduler->collectInfoBarrier);
/* now wait for main thread to process a barrier update for the next round */
countdownlatch_countDownAwait(scheduler->prepareRoundBarrier);
}
}
/* scheduler is done, return NULL to stop worker */
return NULL;
}
void socket_setOutputBufferSize(Socket* socket, gsize newSize) {
MAGIC_ASSERT(socket);
if(newSize >= socket->outputBufferLength) {
socket->outputBufferSize = newSize;
socket->outputBufferSizePending = 0;
} else {
/* ensure positive size, reduce size as buffer drains */
socket->outputBufferSize = socket->outputBufferLength;
socket->outputBufferSizePending = newSize;
}
}
static void _epollwatch_free(gpointer data) {
EpollWatch* watch = data;
MAGIC_ASSERT(watch);
descriptor_removeStatusListener(watch->descriptor, watch->listener);
listener_free(watch->listener);
descriptor_unref(watch->descriptor);
MAGIC_CLEAR(watch);
g_free(watch);
}
void notifyplugin_run(NotifyPluginEvent* event, Host* node) {
MAGIC_ASSERT(event);
debug("event started");
/* check in with epoll to make sure we should carry out the notification */
Epoll* epoll = (Epoll*) host_lookupDescriptor(node, event->epollHandle);
epoll_tryNotify(epoll);
debug("event finished");
}
static void _engine_joinWorkerThreads(Engine* engine) {
MAGIC_ASSERT(engine);
/* wait for all workers to process their events. the last worker must
* wait until we are actually listening for the signal before he
* sends us the signal to prevent deadlock. */
if(!g_atomic_int_dec_and_test(&(engine->protect.nNodesToProcess))) {
while(g_atomic_int_get(&(engine->protect.nNodesToProcess)))
g_cond_wait(engine->workersIdle, engine->engineIdle);
}
}
void tracker_removeSocket(Tracker* tracker, gint handle) {
MAGIC_ASSERT(tracker);
if(_tracker_getFlags(tracker) & TRACKER_FLAGS_SOCKET) {
SocketStats* ss = g_hash_table_lookup(tracker->socketStats, &handle);
if(ss) {
/* remove after we log the stats we have */
ss->removeAfterNextLog = TRUE;
}
}
}
void tracker_updateSocketOutputBuffer(Tracker* tracker, gint handle, gsize outputBufferLength, gsize outputBufferSize) {
MAGIC_ASSERT(tracker);
if(_tracker_getFlags(tracker) & TRACKER_FLAGS_SOCKET) {
SocketStats* ss = g_hash_table_lookup(tracker->socketStats, &handle);
if(ss) {
ss->outputBufferLength = outputBufferLength;
ss->outputBufferSize = outputBufferSize;
}
}
}
void scheduler_addHost(Scheduler* scheduler, Host* host) {
MAGIC_ASSERT(scheduler);
/* this function should only be executed during the initActions phase in
* scheduler_awaitStart, in which we are already holding the globalLock */
/* save the host */
GQuark hostID = host_getID(host);
gpointer hostIDKey = GUINT_TO_POINTER(hostID);
g_hash_table_replace(scheduler->hostIDToHostMap, hostIDKey, host);
}
static void _tcp_updateReceiveWindow(TCP* tcp) {
MAGIC_ASSERT(tcp);
gsize space = socket_getOutputBufferSpace(&(tcp->super));
gsize nPackets = space / (CONFIG_MTU - CONFIG_HEADER_SIZE_TCPIPETH);
tcp->receive.window = nPackets;
if(tcp->receive.window < 1) {
tcp->receive.window = 1;
}
}
static void _tcpserver_free(TCPServer* server) {
MAGIC_ASSERT(server);
/* no need to destroy children in this queue */
g_queue_free(server->pending);
/* this will unref all children */
g_hash_table_destroy(server->children);
MAGIC_CLEAR(server);
g_free(server);
}
static void _tcpchild_free(TCPChild* child) {
MAGIC_ASSERT(child);
/* make sure our tcp doesnt try to free the child again */
child->tcp->child = NULL;
descriptor_unref(child->tcp);
descriptor_unref(child->parent);
MAGIC_CLEAR(child);
g_free(child);
}
static void _process_callbackTimerExpired(Process* proc, ProcessCallbackData* data) {
MAGIC_ASSERT(proc);
utility_assert(data);
if(process_isRunning(proc)) {
program_swapInState(proc->prog, proc->state);
thread_executeCallback2(proc->mainThread, data->callback, data->data, data->argument);
program_swapOutState(proc->prog, proc->state);
}
g_free(data);
}
static void _master_registerProcessCallback(ConfigurationProcessElement* pe, ProcessCallbackArgs* args) {
utility_assert(pe && args);
MAGIC_ASSERT(args->master);
utility_assert(pe->plugin.isSet && pe->plugin.string);
utility_assert(pe->arguments.isSet && pe->arguments.string);
slave_addNewVirtualProcess(args->master->slave, args->hostParams->hostname, pe->plugin.string->str,
pe->preload.isSet ? pe->preload.string->str : NULL,
SIMTIME_ONE_SECOND * pe->starttime.integer,
pe->stoptime.isSet ? SIMTIME_ONE_SECOND * pe->stoptime.integer : 0,
pe->arguments.string->str);
}
gboolean engine_handleInterruptSignal(gpointer user_data) {
Engine* engine = user_data;
MAGIC_ASSERT(engine);
/* handle (SIGHUP, SIGTERM, SIGINT), shutdown cleanly */
_engine_lock(engine);
engine->endTime = 0;
_engine_unlock(engine);
/* dont remove the source */
return FALSE;
}