pointerBitLockMaskPtr

void * pointerBitLockMaskPtr(void *  ptr,  uint  lockBit,  bool  set,  size_t preserveMask,  void *  preservePtr =  null)

This mangles ptr as [glib.global.pointerBitLock] and [glib.global.pointerBitUnlock] do.

`ptr`	the pointer to mask
`lockBit`	the bit to set/clear. If set to `G_MAXUINT`, the lockbit is taken from preserve_ptr or ptr (depending on preserve_mask).
`set`	whether to set (lock) the bit or unset (unlock). This has no effect, if lock_bit is set to `G_MAXUINT`.
`preserveMask`	if non-zero, a bit-mask for preserve_ptr. The preserve_mask bits from preserve_ptr are set in the result. Note that the lock_bit bit will be always set according to set, regardless of preserve_mask and preserve_ptr (unless lock_bit is `G_MAXUINT`).
`preservePtr`	if preserve_mask is non-zero, the bits from this pointer are set in the result.

the mangled pointer.