Pointers
SysSemRmpHdl contais the selector that points the system semaphore names RMP.
Locations
PTDA field SysSemPTDATbl is the location of the per-process semaphore table.
PTDA per-process semaphore contains byte-length enties, which are per-semaphore use counts.
The semaphore handle indexes both the per-process and global semaphore tables.
SysSemHighTable locates the table of SysSemHighTableS structures.
Other global tables are owned by os2krnl (0xffaa).
SysSemHandleStruc System Semaphore Handle Structure
旼컴컴컴컴컴컴컴컴컫컴컴쩡컴컴컴컫컴컴쩡컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴커�Field Name �Off �Length �Type�Description � 쳐컴컴컴컴컴컴컴컴컵컴컴탠컴컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞ysSemHighWord �+0 �2 쿥 �0x8000 for sys sems � 쳐컴컴컴컴컴컴컴컴컵컴컴탠컴컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞ysSemPTDAIndex �+2 �2 쿥 쿔ndex into the PTDA open sem table � 읕컴컴컴컴컴컴컴컴컨컴컴좔컴컴컴컨컴컴좔컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴켸
SysSemTblStruc System Semaphore Table Structure
旼컴컴컴컴컴컴컴컴컫컴컴쩡컴컴컴컫컴컴쩡컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴커 �Field Name �Off �Length �Type�Description � 쳐컴컴컴컴컴컴컴컴컵컴컴탠컴컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞ysSemOwner �+0 �2 쿥 퀃hread owning this semaphore � 쳐컴컴컴컴컴컴컴컴컵컴컴탠컴컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞ysSemFlag �+2 �1 쿍 퀂ystem semaphore flag bit field � 쳐컴컴컴컴컴컴컴컴컵컴컴탠컴컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞ysSemRefCnt �+3 �1 쿍 쿻umber of references to this sys sem � 쳐컴컴컴컴컴컴컴컴컵컴컴탠컴컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞ysSemProcCnt �+4 �1 쿍 쿻umber of requests for this owner � 쳐컴컴컴컴컴컴컴컴컵컴컴탠컴컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞ysSemPad �+5 �1 쿍 쿾ad byte to round structure up to word � 읕컴컴컴컴컴컴컴컴컨컴컴좔컴컴컴컨컴컴좔컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴켸
SysSemHighTableS System Semaphore Table Extension Structure.
This is an extension of the SysSemTblStruc that is put into high memory so we don't impact the low data segment. It is only used in protected mode during process/thread termination.
旼컴컴컴컴컴컴컴컴컫컴컴쩡컴컴컴컫컴컴쩡컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴커 �Field Name �Off �Length �Type�Description � 쳐컴컴컴컴컴컴컴컴컵컴컴탠컴컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞ysSemPidOwner �+0 �2 쿥 쿾id owner, the thread owner has died � 읕컴컴컴컴컴컴컴컴컨컴컴좔컴컴컴컨컴컴좔컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴켸
SysSemNameStruc System Semaphore Name table structure, managed by an RMP.
旼컴컴컴컴컴컴컴컴컫컴컴쩡컴컴컴컫컴컴쩡컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴커 �Field Name �Off �Length �Type�Description � 쳐컴컴컴컴컴컴컴컴컵컴컴탠컴컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞ysSemPtr �+0 �2 쿥 � � 읕컴컴컴컴컴컴컴컴컨컴컴좔컴컴컴컨컴컴좔컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴켸
SysSemFlag flag field definitions:
旼컴컴컴컴컴컴컴컴컴컴컴컫컴컴컴컴쩡컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴커 쿙ame 쿍it Mask쿏escription � 쳐컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞YSSEM_WAITING �0x01 쿪 thread is waiting on the sem � 쳐컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞YSSEM_MUXWAITING �0x02 쿪 thread is muxwaiting on the sem � 쳐컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞YSSEM_OWNER_DIED �0x04 퀃he process/thread owning the sem died� 쳐컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞YSSEM_EXCLUSIVE �0x08 쿶ndicates a exclusive system semaphore� 쳐컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞YSSEM_NAME_CLEANUP �0x10 쿻ame table entry needs to be removed � 쳐컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞YSSEM_THREAD_OWNER_DIED�0x20 퀃he thread owning the sem died � 쳐컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞YSSEM_EXITLIST_OWNER �0x40 퀃he exitlist thread owns the sem � 읕컴컴컴컴컴컴컴컴컴컴컴컨컴컴컴컴좔컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴켸