/*
* For client: connect to the shared memory. Open incoming and
* outgoing streams.
*/
static jint
openConnection(SharedMemoryTransport *transport, jlong otherPID,
SharedMemoryConnection **connectionPtr)
{
jint error;
SharedMemoryConnection *connection = allocConnection();
if (connection == NULL) {
return SYS_NOMEM;
}
sprintf(connection->name, "%s.%ld", transport->name, sysProcessGetID());
error = sysSharedMemOpen(connection->name, &connection->sharedMemory,
&connection->shared);
if (error != SYS_OK) {
closeConnection(connection);
return error;
}
/* This process is the client */
connection->incoming.shared = &connection->shared->toClient;
connection->outgoing.shared = &connection->shared->toServer;
error = openStream(&connection->incoming);
if (error != SYS_OK) {
closeConnection(connection);
return error;
}
error = openStream(&connection->outgoing);
if (error != SYS_OK) {
closeConnection(connection);
return error;
}
error = sysProcessOpen(otherPID, &connection->otherProcess);
if (error != SYS_OK) {
fprintf(stderr,"Error accessing process, rc = %d\n", error);
closeConnection(connection);
return error;
}
/*
* Create an event that signals that the connection is shutting
* down. The event is unnamed as it's process local, and is
* manually reset (so that signalling the event will signal
* all threads waiting on it).
*/
error = sysEventCreate(NULL, &connection->shutdown, JNI_TRUE);
if (error != SYS_OK) {
fprintf(stderr,"Error creating unnamed event, rc = %d\n", error);
closeConnection(connection);
return error;
}
*connectionPtr = connection;
return SYS_OK;
}
static int
openTransport(const char *address, SharedMemoryTransport **transportPtr)
{
jint error;
SharedMemoryTransport *transport;
transport = allocTransport();
if (transport == NULL) {
return SYS_NOMEM;
}
memset(transport, 0, sizeof(*transport));
if (strlen(address) >= MAX_IPC_PREFIX) {
char buf[128];
sprintf(buf, "Error: address strings longer than %d characters are invalid\n", MAX_IPC_PREFIX);
setLastErrorMsg(buf);
closeTransport(transport);
return SYS_ERR;
}
error = sysSharedMemOpen(address, &transport->sharedMemory, &transport->shared);
if (error != SYS_OK) {
setLastError(error);
closeTransport(transport);
return error;
}
strcpy(transport->name, address);
error = sysIPMutexOpen(transport->shared->mutexName, &transport->mutex);
if (error != SYS_OK) {
setLastError(error);
closeTransport(transport);
return error;
}
error = sysEventOpen(transport->shared->acceptEventName,
&transport->acceptEvent);
if (error != SYS_OK) {
setLastError(error);
closeTransport(transport);
return error;
}
error = sysEventOpen(transport->shared->attachEventName,
&transport->attachEvent);
if (error != SYS_OK) {
setLastError(error);
closeTransport(transport);
return error;
}
*transportPtr = transport;
return SYS_OK;
}
