Method shutdown

src/jrd/Mapping.cpp:655–691

	}

	void shutdown()
	{
		if (!sharedMemory)
			return;
		MutexLockGuard gLocal(initMutex, FB_FUNCTION);
		if (!sharedMemory)
			return;

		{	// scope
			Guard gShared(this);

			MappingHeader* sMem = sharedMemory->getHeader();
			fb_assert(sMem->process[process].id);
			sMem->process[process].flags &= ~MappingHeader::FLAG_ACTIVE;

			(void)  // Ignore errors in cleanup
				sharedMemory->eventPost(&sMem->process[process].notifyEvent);

			cleanupSync.waitForCompletion();

			// Ignore errors in cleanup
			sharedMemory->eventFini(&sMem->process[process].notifyEvent);
			sharedMemory->eventFini(&sMem->process[process].callbackEvent);

			while (sMem->processes)
			{
				if (sMem->process[sMem->processes - 1].flags & MappingHeader::FLAG_ACTIVE)
					break;
				sMem->processes--;
			}

			if (!sMem->processes)
				sharedMemory->removeMapFile();
		}

		sharedMemory = nullptr;
	}

	void clearCache(const char* dbName, USHORT index)
	{