// 
// sub_180019820 from 0x180019820 to 0x1800198ca (170 bytes)
// 
// 2 xrefs:
// > <???> @ 0x180028ff8
// > <???> @ 0x18004ac68
// 
// This function is hookable on this platform!
// 
// Using BromaIDA 8.0.0 @ https://github.com/Stazzical/BromaIDA
// Using bindings at commit ba9f177b at Thu Jul 16 22:52:06 2026 from https://github.com/geode-sdk/bindings
// 

void __fastcall sub_180019820(__int64 a1)
{
  __int64 v2; // r8
  __int64 v3; // r9
  __int64 *v4; // rcx
  __int64 v5; // rdx
  void *v6; // rbx
  __int64 v7; // rcx

  pthread_mutex_lock(a1 + 72);
  v2 = *(_QWORD *)(a1 + 56);
  v3 = *(_QWORD *)(v2 + 8);
  if ( v3 )
  {
    v4 = **(__int64 ***)v2;
    v5 = *v4;
    v6 = (void *)v4[2];
    *(_QWORD *)(v2 + 8) = v3 - 1;
    *(_QWORD *)v4[1] = v5;
    *(_QWORD *)(v5 + 8) = v4[1];
    j_j_free(v4);
    pthread_mutex_unlock(a1 + 72);
    v7 = *(_QWORD *)(a1 + 104);
    if ( v7 )
      (*(void (__fastcall **)(__int64, void *))(*(_QWORD *)v7 + 32LL))(v7, v6);
    if ( v6 )
      j_j_free(v6);
  }
  else
  {
    pthread_mutex_unlock(a1 + 72);
  }
}