undefined ** FUN_00018778(void)

{

  uint *puVar1;

  uint *puVar2;

  undefined **ppuVar3;

  int iVar4;

  undefined *apuStackX_0 [4];

  ppuVar3 = &__pthread_initial_thread;

  if ((apuStackX_0 < __pthread_initial_thread_bos) &&

     ((apuStackX_0 < __pthread_manager_thread_bos ||

      (ppuVar3 = (undefined **)&__pthread_manager_thread,

      __pthread_manager_thread_tos <= apuStackX_0)))) {

    if (__pthread_nonstandard_stacks != 0) {

      iVar4 = 0x2d030;

      do {

        for (; puVar1 = (uint *)(iVar4 + 8), (undefined **)*puVar1 < apuStackX_0;

            iVar4 = iVar4 + 0x10) {

        }

        puVar2 = (uint *)(iVar4 + 0xc);

        iVar4 = iVar4 + 0x10;

      } while (apuStackX_0 < (undefined **)*puVar2);

      return (undefined **)*puVar1;

    }

    ppuVar3 = (undefined **)(((uint)apuStackX_0 | 0x1fffff) - 0x1df);

  }

  return ppuVar3;

}