80727f27b2
* harbour/src/vm/hashes.c
! use hb_gcMark() instead of hb_gcItemRef() to mark unlocked item
* harbour/src/vm/garbage.c
* moved hb_itemClear() from hb_gcGripDrop() to hb_gcGripRelease()
Now items are freed in the same way as any other GC blocks and
hb_gcGripDrop() is simple wrapper to hb_gcRefFree()
* harbour/src/vm/hvm.c
* harbour/src/vm/thread.c
! unlock item which stores thread return value to eliminate possible
memory leaks, i.e. when thread returns its own pointer item.
! unlock item which stores notify messages to eliminate possible
memory leaks, i.e. when mutex is used as notify value in its
own message queue.
* harbour/include/hbapigt.h
* harbour/include/hbgtcore.h
* harbour/src/rtl/hbgtcore.c
* harbour/src/vm/garbage.c
+ added new GT method MARK() executed by GC to mark all internall
GC blocks as used.
+ added hb_gtIsGtRef() internal function
! unlock internal GT items (pCargo, pNotifierBlock, pMutex) to
eliminate possible memory leaks, i.e. when pGT item is stored
in it's own cargo value or is accessed from notifier codeblock