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71 lines
1.5 KiB
C
71 lines
1.5 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS Runtime Library
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* PURPOSE: Slist Routines
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* FILE: lib/rtl/slist.c
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* PROGRAMERS: Stefan Ginsberg (stefan__100__@hotmail.com)
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*/
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/* INCLUDES *****************************************************************/
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#include <rtl.h>
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#define NDEBUG
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#include <debug.h>
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/* FUNCTIONS ***************************************************************/
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VOID
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NTAPI
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RtlInitializeSListHead(IN PSLIST_HEADER ListHead)
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{
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#ifdef _WIN64
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ListHead->Alignment = 0;
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ListHead->Region = 0;
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ListHead->Header8.Init = 1;
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// ListHead->Header8.HeaderType = 1; // FIXME: depending on cmpxchg16b support?
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#else
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ListHead->Alignment = 0;
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#endif
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}
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PSLIST_ENTRY
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NTAPI
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RtlFirstEntrySList(IN const SLIST_HEADER *ListHead)
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{
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#ifdef _WIN64
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if (ListHead->Header8.HeaderType)
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{
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return (PVOID)(ListHead->Region & ~0xF);
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}
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else
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{
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union {
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PVOID P;
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struct {
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ULONG64 Reserved:4;
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ULONG64 NextEntry:39;
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ULONG64 Reserved2:21;
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} Bits;
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} Pointer;
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Pointer.P = (PVOID)ListHead;
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Pointer.Bits.NextEntry = ListHead->Header8.NextEntry;
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return Pointer.P;
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}
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#else
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return ListHead->Next.Next;
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#endif
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}
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WORD
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NTAPI
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RtlQueryDepthSList(IN PSLIST_HEADER ListHead)
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{
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#ifdef _WIN64
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return ListHead->Header8.HeaderType ?
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ListHead->Header16.Sequence : ListHead->Header8.Sequence;
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#else
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return ListHead->Depth;
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#endif
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}
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