CCS/CC1350: How to create a task for the GPTimer26XX.h example?

Part Number: CC1350

Tool/software: Code Composer Studio

I'm trying to use the example function for the timer driver, but I didn't understand a few things:

http://dev.ti.com/tirex/content/simplelink_cc13x0_sdk_1_30_00_06/docs/tidrivers/doxygen/html/_g_p_timer_c_c26_x_x_8h.html

void taskFxn(UArg a0, UArg a1) {
  GPTimerCC26XX_Params params;
  GPTimerCC26XX_Params_init(&params);
  params.width          = GPT_CONFIG_16BIT;
  params.mode           = GPT_MODE_PERIODIC_UP;
  params.debugStallMode = GPTimerCC26XX_DEBUG_STALL_OFF;
  hTimer = GPTimerCC26XX_open(CC2650_GPTIMER0A, &params);
  if(hTimer == NULL) {
    Log_error0("Failed to open GPTimer");
    Task_exit();
  }
  Types_FreqHz  freq;
  BIOS_getCpuFreq(&freq);
  GPTimerCC26XX_Value loadVal = freq.lo / 1000 - 1; //47999
  GPTimerCC26XX_setLoadValue(hTimer, loadVal);
  GPTimerCC26XX_registerInterrupt(hTimer, timerCallback, GPT_INT_TIMEOUT);
  GPTimerCC26XX_start(hTimer);
  while(1) {
    Task_sleep(BIOS_WAIT_FOREVER);
  }
}

What do reference arguments a0 and a1 account for?

And how do I create tasks that will use this function?

Thank you