Handle remoteSharedMemory = 1;
SharedMemory _sharedmemory = {};
bool SharedMemoryUsed = false;

//Function pinging SaltyNX InjectServ port to check if it's alive.
bool CheckPort () {
	Handle saltysd;
	for (int i = 0; i < 67; i++) {
		if (R_SUCCEEDED(svcConnectToNamedPort(&saltysd, "InjectServ"))) {
			svcCloseHandle(saltysd);
			break;
		}
		else {
			if (i == 66) return false;
			svcSleepThread(1'000'000);
		}
	}
	for (int i = 0; i < 67; i++) {
		if (R_SUCCEEDED(svcConnectToNamedPort(&saltysd, "InjectServ"))) {
			svcCloseHandle(saltysd);
			return true;
		}
		else svcSleepThread(1'000'000);
	}
	return false;
}

bool LoadSharedMemory() {
    //Connect to main SaltyNX port. On failed attempt return false
    if (SaltySD_Connect())
      return false;
    //Retrieve handle necessary to get access to SaltyNX SharedMemory
    SaltySD_GetSharedMemoryHandle(&remoteSharedMemory);
    //Terminate SaltyNX main port connection
    SaltySD_Term();
    
    //Prepare struct that will be passed to shmemMap to get access to SaltyNX SharedMemory
    shmemLoadRemote(&_sharedmemory, remoteSharedMemory, 0x1000, Perm_Rw);
    //Try to get access to SaltyNX SharedMemory
    if (!shmemMap(&_sharedmemory)) {
      //On success change bool of SharedMemoryUsed to true and return true
      SharedMemoryUsed = true;
      return true;
    }
    //On failed attemp return false
    return false;
}

//By connecting to InjectServ port we can check if SaltyNX is alive and is not stuck anywhere.
bool SaltyNX = CheckPort();
//Check if SaltyNX signaled anything, if yes then use LoadSharedMemory() to get access to SaltyNX SharedMemory
if (SaltyNX) LoadSharedMemory();

uint32_t* MAGIC_shared = 0;
uint8_t* FPS_shared = 0;
float* FPSavg_shared = 0;
bool* pluginActive = 0;

//Function searching for NX-FPS magic through SharedMemory.
//SaltyNX is page aligning any SharedMemory reservation request to 4, that's why we check every 4th byte for MAGIC.
ptrdiff_t searchSharedMemoryBlock(uintptr_t base) {
	ptrdiff_t search_offset = 0;
	while(search_offset < 0x1000) {
		MAGIC_shared = (uint32_t*)(base + search_offset);
		if (*MAGIC_shared == 0x465053) {
			return search_offset;
		}
		else search_offset += 4;
	}
	return -1;
}

//Get virtual address of SaltyNX SharedMemory
uintptr_t base = (uintptr_t)shmemGetAddr(&_sharedmemory);
//Pass retrieved virtual address of SaltyNX SharedMemory to function that will search for NX-FPS magic
ptrdiff_t rel_offset = searchSharedMemoryBlock(base);
//If magic will be found, you will get offset that starts before magic. It cannot be lower than 0.
if (rel_offset > -1) {
  //Pass correct addresses inside SharedMemory to our pointers
  //It shows how many frames passed in one second
  FPS_shared = (uint8_t*)(base + rel_offset + 4);
  //It calculates average FPS based on last 10 readings
  FPSavg_shared = (float*)(base + rel_offset + 5);
  //Pointer where plugin writes true for every frame.
  pluginActive = (bool*)(base + rel_offset + 9);
  ///By passing false to *pluginActive and checking later if it has changed to true we can be sure plugin is working.
  *pluginActive = false;
}