//--------------------------------------------------------------------------------------------------
le_msg_SessionEventHandlerRef_t le_msg_AddServiceCloseHandler
(
le_msg_ServiceRef_t serviceRef, ///< [in] Reference to the service.
le_msg_SessionEventHandler_t handlerFunc,///< [in] Handler function.
void* contextPtr ///< [in] Opaque pointer value to pass to handler.
)
//--------------------------------------------------------------------------------------------------
{
LE_FATAL_IF(serviceRef == NULL,
"Service doesn't exist. Make sure service is started before setting handlers");
LE_FATAL_IF(serviceRef->serverThread != le_thread_GetCurrent(),
"Service (%s:%s) not owned by calling thread.",
serviceRef->id.name,
le_msg_GetProtocolIdStr(serviceRef->id.protocolRef));
// Create the node.
SessionEventHandler_t* closeEventPtr = le_mem_ForceAlloc(HandlerEventPoolRef);
// Initialize the node.
closeEventPtr->handler = handlerFunc;
closeEventPtr->contextPtr = contextPtr;
closeEventPtr->link = LE_DLS_LINK_INIT;
closeEventPtr->listPtr = &serviceRef->closeListPtr;
// Add the node to the head of the list by passing in the node's link.
le_dls_Stack(&serviceRef->closeListPtr, &closeEventPtr->link);
// Need to return a unique reference that will be used by the remove function.
closeEventPtr->ref = le_ref_CreateRef(HandlersRefMap, &closeEventPtr->link);
return closeEventPtr->ref;
}
//--------------------------------------------------------------------------------------------------
le_msg_ServiceRef_t le_msg_CreateService
(
le_msg_ProtocolRef_t protocolRef, ///< [in] Reference to the protocol to be used.
const char* serviceName ///< [in] The service instance name.
)
//--------------------------------------------------------------------------------------------------
{
// Must lock the mutex to prevent races between different threads trying to offer the
// same service at the same time, or one thread trying to delete a service while another
// tries to create it, or accessing the Service List hashmap while another thread
// is updating it.
LOCK
// Get a Service object.
Service_t* servicePtr = GetService(protocolRef, serviceName);
// If the Service object already has a server thread, then it means that this service
// is already being offered by someone else in this very process.
LE_FATAL_IF(servicePtr->serverThread != NULL,
"Duplicate service (%s:%s) offered in same process.",
serviceName,
le_msg_GetProtocolIdStr(protocolRef));
servicePtr->serverThread = le_thread_GetCurrent();
UNLOCK
return servicePtr;
}
//--------------------------------------------------------------------------------------------------
void le_msg_DeleteService
(
le_msg_ServiceRef_t serviceRef ///< [in] Reference to the service.
)
//--------------------------------------------------------------------------------------------------
{
LE_FATAL_IF(serviceRef->serverThread != le_thread_GetCurrent(),
"Attempted to delete service (%s:%s) not owned by thread.",
serviceRef->id.name,
le_msg_GetProtocolIdStr(serviceRef->id.protocolRef));
// If the service is still advertised, hide it.
le_msg_HideService(serviceRef);
// Close any remaining open sessions.
CloseAllSessions(serviceRef);
// NOTE: Lock the mutex here to prevent a race between this thread dropping ownership
// of the service and another thread trying to offer the same service. This is very
// unlikely to ever happen, but just in case, make sure it fails with a sensible
// ("duplicate") log message, instead of just quietly messing up the hashmap or something.
LOCK
// Clear out the server thread reference.
serviceRef->serverThread = NULL;
// Release the server's hold on the object.
le_mem_Release(serviceRef);
UNLOCK
}
//--------------------------------------------------------------------------------------------------
void AdvertiseService
(
void
)
{
LE_DEBUG("======= Starting Server %s ========", SERVICE_INSTANCE_NAME);
le_msg_ProtocolRef_t protocolRef;
// Create the server data pool
_ServerDataPool = le_mem_CreatePool("ServerData", sizeof(_ServerData_t));
// Create safe reference map for handler references.
// The size of the map should be based on the number of handlers defined for the server.
// Don't expect that to be more than 2-3, so use 3 as a reasonable guess.
_HandlerRefMap = le_ref_CreateMap("ServerHandlers", 3);
// Start the server side of the service
protocolRef = le_msg_GetProtocolRef(PROTOCOL_ID_STR, sizeof(_Message_t));
_ServerServiceRef = le_msg_CreateService(protocolRef, SERVICE_INSTANCE_NAME);
le_msg_SetServiceRecvHandler(_ServerServiceRef, ServerMsgRecvHandler, NULL);
le_msg_AdvertiseService(_ServerServiceRef);
// Register for client sessions being closed
le_msg_AddServiceCloseHandler(_ServerServiceRef, CleanupClientData, NULL);
// Need to keep track of the thread that is registered to provide this service.
_ServerThreadRef = le_thread_GetCurrent();
}
// A thread "main" function which creates a series of sems.
static void* ThreadCreateSem
(
void* context
)
{
char semNameBuffer[LIMIT_MAX_SEMAPHORE_NAME_BYTES] = {0};
LE_INFO("Thread [%s] has started. Waiting on a semaphore.", le_thread_GetMyName());
le_mutex_Lock(SemIndexMutexRef);
snprintf(semNameBuffer, LIMIT_MAX_SEMAPHORE_NAME_BYTES, "[%s]Sem%ld",
le_thread_GetMyName(), SemCreateIdx);
le_sem_Ref_t sem = le_sem_Create(semNameBuffer, 0);
SemRefArray[SemCreateIdx] = (SemRef_t){le_thread_GetCurrent(), sem};
SemCreateIdx++;
le_mutex_Unlock(SemIndexMutexRef);
LE_INFO("In thread [%s], about to wait sem", le_thread_GetMyName());
// notify the calling thread that this thread is about to wait on its sema.
le_sem_Post(SemaRef);
le_sem_Wait(sem);
LE_INFO("In thread [%s], sema is posted", le_thread_GetMyName());
le_event_RunLoop();
return NULL;
}
// Delete all mutexes for the first thread.
static void DelAllMutexesFor1stThread
(
void* param1,
void* param2
)
{
LE_INFO("DelAllMutexesFor1stThread in thread [%s]", le_thread_GetMyName());
// Determine if this is the "1st" thread on the thread list. If so, delete all mutexes.
if (le_thread_GetCurrent() == ThreadRefArray[0])
{
LE_INFO("This thread is the 1st thread in the thread list - deleting all mutexes.");
DelMutexes(0, 0);
}
}
//--------------------------------------------------------------------------------------------------
void le_msg_SetServiceRecvHandler
(
le_msg_ServiceRef_t serviceRef, ///< [in] Reference to the service.
le_msg_ReceiveHandler_t handlerFunc,///< [in] Handler function.
void* contextPtr ///< [in] Opaque pointer value to pass to the handler.
)
//--------------------------------------------------------------------------------------------------
{
LE_FATAL_IF(serviceRef->serverThread != le_thread_GetCurrent(),
"Service (%s:%s) not owned by calling thread.",
serviceRef->id.name,
le_msg_GetProtocolIdStr(serviceRef->id.protocolRef));
serviceRef->recvHandler = handlerFunc;
serviceRef->recvContextPtr = contextPtr;
}
// Delete all mutexes for a thread in the middle.
static void DelAllMutexesForMidThread
(
void* param1,
void* param2
)
{
LE_INFO("DelAllMutexesForMidThread in thread [%s]", le_thread_GetMyName());
long midIdx = ThreadNum / 2;
// Determine if this is the "mid" thread on the thread list. If so, delete all mutexes.
if (le_thread_GetCurrent() == ThreadRefArray[midIdx])
{
LE_INFO("This thread is the mid thread in the thread list - deleting all mutexes.");
DelMutexes(0, 0);
}
}
//--------------------------------------------------------------------------------------------------
__attribute__((unused)) static void SendMsgToClient
(
le_msg_MessageRef_t msgRef ///< [in] Reference to the message.
)
{
/*
* If called from a thread other than the server thread, queue the message onto the server
* thread. This is necessary to allow async response/handler functions to be called from any
* thread, whereas messages to the client can only be sent from the server thread.
*/
if ( le_thread_GetCurrent() != _ServerThreadRef )
{
le_event_QueueFunctionToThread(_ServerThreadRef,
SendMsgToClientQueued,
msgRef,
NULL);
}
else
{
le_msg_Send(msgRef);
}
}
//--------------------------------------------------------------------------------------------------
BugTestRef_t AddBugTest
(
const char* newPathPtr,
///< [IN]
BugTestFunc_t handlerPtr,
///< [IN]
void* contextPtr
///< [IN]
)
{
le_msg_MessageRef_t _msgRef;
le_msg_MessageRef_t _responseMsgRef;
_Message_t* _msgPtr;
// Will not be used if no data is sent/received from server.
__attribute__((unused)) uint8_t* _msgBufPtr;
BugTestRef_t _result;
// Range check values, if appropriate
if ( strlen(newPathPtr) > 512 ) LE_FATAL("strlen(newPathPtr) > 512");
// Create a new message object and get the message buffer
_msgRef = le_msg_CreateMsg(GetCurrentSessionRef());
_msgPtr = le_msg_GetPayloadPtr(_msgRef);
_msgPtr->id = _MSGID_AddBugTest;
_msgBufPtr = _msgPtr->buffer;
// Pack the input parameters
_msgBufPtr = PackString( _msgBufPtr, newPathPtr );
// The input parameters are stored in the client data object, and it is
// a pointer to this object that is passed down.
// Create a new client data object and fill it in
_ClientData_t* _clientDataPtr = le_mem_ForceAlloc(_ClientDataPool);
_clientDataPtr->handlerPtr = (le_event_HandlerFunc_t)handlerPtr;
_clientDataPtr->contextPtr = contextPtr;
_clientDataPtr->callersThreadRef = le_thread_GetCurrent();
contextPtr = _clientDataPtr;
_msgBufPtr = PackData( _msgBufPtr, &contextPtr, sizeof(void*) );
// Send a request to the server and get the response.
LE_DEBUG("Sending message to server and waiting for response");
_responseMsgRef = le_msg_RequestSyncResponse(_msgRef);
// It is a serious error if we don't get a valid response from the server
LE_FATAL_IF(_responseMsgRef == NULL, "Valid response was not received from server");
// Process the result and/or output parameters, if there are any.
_msgPtr = le_msg_GetPayloadPtr(_responseMsgRef);
_msgBufPtr = _msgPtr->buffer;
// Unpack the result first
_msgBufPtr = UnpackData( _msgBufPtr, &_result, sizeof(_result) );
// Put the handler reference result into the client data object, and
// then return a safe reference to the client data object as the reference.
_clientDataPtr->handlerRef = (le_event_HandlerRef_t)_result;
_LOCK
_result = le_ref_CreateRef(_HandlerRefMap, _clientDataPtr);
_UNLOCK
// Unpack any "out" parameters
// Release the message object, now that all results/output has been copied.
le_msg_ReleaseMsg(_responseMsgRef);
return _result;
}
