u_result
u_userAddDomain(
u_domain domain)
{
u_domainAdmin ka;
u_user u;
u_result result;
os_sharedHandle shm;
os_result osr;
if(domain) {
u = u__userLock();
if(u){
if (u->domainCount + 1 < MAX_DOMAINS) {
shm = u_domainSharedMemoryHandle(domain);
u->domainCount++;
ka = &u->domainList[u->domainCount];
ka->domain = domain;
/* The keepList holds all domain references issues by
* u_userKeep().
* This list will keep the objects alive until the objects
* are removed by u_userFree() or when the domain is detached
* from the process e.g. when a process terminates.
*/
ka->keepList = NULL;
ka->lowerBound = (c_address)os_sharedAddress(shm);
osr = os_sharedSize(shm, (os_address*)&ka->upperBound);
if (osr != os_resultSuccess) {
OS_REPORT(OS_ERROR,
"u_userAddDomain",0,
"shared memory size cannot be determined");
result = U_RESULT_INTERNAL_ERROR;
} else {
result = U_RESULT_OK;
}
ka->upperBound += ka->lowerBound;
} else {
OS_REPORT_1(OS_ERROR,
"u_userAddDomain",0,
"Max connected Domains (%d) reached!", MAX_DOMAINS - 1);
result = U_RESULT_OUT_OF_MEMORY;
}
u__userUnlock();
} else {
OS_REPORT(OS_ERROR,
"u_userAddDomain",0,
"User layer not initialized");
result = U_RESULT_PRECONDITION_NOT_MET;
}
} else {
OS_REPORT(OS_ERROR,
"u_userAddDomain",0,
"Invalid Domain specified: Domain = NULL");
result = U_RESULT_ILL_PARAM;
} /* Fail already reported by u_domainNew */
return result;
}
static void*
shmMonitorMain(
void* arg)
{
os_sharedHandle shmHandle;
u_result cleanupResult;
os_result result;
os_duration blockingTime = 10*OS_DURATION_MILLISECOND;
os_shmClient clients, client;
s_shmMonitor _this = (s_shmMonitor)arg;
os_procId ownPID;
ownPID = os_procIdSelf();
shmHandle = u_domainSharedMemoryHandle(
u_participantDomain(
u_participant(
splicedGetService(_this->spliceDaemon))));
os_mutexLock(&_this->mutex);
while(_this->terminate == OS_FALSE){
clients = NULL;
os_mutexUnlock(&_this->mutex);
ut_threadAsleep(_this->thr, 1);
result = os_sharedMemoryWaitForClientChanges(shmHandle, blockingTime, &clients);
os_mutexLock(&_this->mutex);
if(result == os_resultSuccess){
client = clients;
_this->shmState = SHM_STATE_UNKNOWN;
while(client){
if(client->state == OS_SHM_PROC_TERMINATED){
if(client->procId != ownPID){
OS_REPORT(OS_WARNING, OSRPT_CNTXT_SPLICED, 0,
"Detected termination of process %d, that failed "
"to clean up its resources before terminating. "
"Attempting to clean up its resources now..."
, client->procId);
os_mutexUnlock(&_this->mutex);
/* Allow the u_splicedCleanupProcessInfo() to take as
* long as MAX(leasePeriod, serviceTerminatePeriod).
* This is set in the threadsMonitor as the threads
* interval.
* By indicating that it'll sleep for 1 second, it
* is allowed to stay dormant for that 1 second plus
* the threads interval.
*/
ut_threadAsleep(_this->thr, 1);
cleanupResult = u_splicedCleanupProcessInfo(splicedGetService(_this->spliceDaemon),
client->procId);
os_mutexLock(&_this->mutex);
if(cleanupResult != U_RESULT_OK){
OS_REPORT(OS_FATAL, OSRPT_CNTXT_SPLICED, 0,
"Cleaning up resources of terminated process "
"%d failed, because process was modifying "
"shared resources when it terminated, "
"stopping domain now...",
client->procId);
_this->shmState = SHM_STATE_UNCLEAN;
os_condSignal(&_this->cleanCondition);
splicedSignalTerminate(_this->spliceDaemon, SPLICED_EXIT_CODE_RECOVERABLE_ERROR, SPLICED_SHM_NOK);
} else {
OS_REPORT(OS_INFO, OSRPT_CNTXT_SPLICED, 0,
"Successfully cleaned up resources of "
"terminated process %d.", client->procId);
}
} else {
OS_REPORT(OS_FATAL, OSRPT_CNTXT_SPLICED, 0,
"Detected unexpected detach of kernel by my own "
"process, stopping domain now...");
_this->shmState = SHM_STATE_UNCLEAN;
os_condSignal(&_this->cleanCondition);
splicedSignalTerminate(_this->spliceDaemon, SPLICED_EXIT_CODE_RECOVERABLE_ERROR, SPLICED_SHM_NOK);
}
ut_threadAwake(_this->thr);
}
client = client->next;
}
os_shmClientFree(clients);
if (_this->shmState == SHM_STATE_UNKNOWN) {
_this->shmState = SHM_STATE_CLEAN;
os_condSignal(&_this->cleanCondition);
}
} else if (result == os_resultUnavailable) {
/* client list is empty so we need to give up some cpu time
* in order that it can be initialised on non timesliced systems
* e.g. vxworks kernel builds
*/
ut_sleep(_this->thr, 100*OS_DURATION_MICROSECOND);
}
}
os_mutexUnlock(&_this->mutex);
return NULL;
}
