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180 lines
3.8 KiB
C
180 lines
3.8 KiB
C
/*++
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Copyright (c) 1995-1997 Microsoft Corporation
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Module Name :
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openf.h
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Abstract:
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This module defines functions for opening and closing files
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and provides transparent caching for file handles
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Project:
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Internet Server API Extnensions Samples DLL
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Revision History:
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--*/
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# ifndef _OPENF_HXX_
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# define _OPENF_HXX_
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/************************************************************
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* Include Headers
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************************************************************/
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# include <windows.h>
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# include <httpext.h>
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/************************************************************
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* Type Definitions
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************************************************************/
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//
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// Doubly linked list structure. Can be used as either a list head, or
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// as link words.
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//
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// typedef struct _LIST_ENTRY {
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// struct _LIST_ENTRY * volatile Flink;
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// struct _LIST_ENTRY * volatile Blink;
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// } LIST_ENTRY, *PLIST_ENTRY, *RESTRICTED_POINTER PRLIST_ENTRY;
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//
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// Doubly-linked list manipulation routines. Implemented as macros
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// but logically these are procedures.
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//
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//
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// VOID
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// InitializeListHead(
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// PLIST_ENTRY ListHead
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// );
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//
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#define InitializeListHead(ListHead) (\
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(ListHead)->Flink = (ListHead)->Blink = (ListHead))
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//
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// BOOLEAN
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// IsListEmpty(
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// PLIST_ENTRY ListHead
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// );
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//
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#define IsListEmpty(ListHead) \
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((ListHead)->Flink == (ListHead))
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//
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// PLIST_ENTRY
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// RemoveHeadList(
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// PLIST_ENTRY ListHead
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// );
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//
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#define RemoveHeadList(ListHead) \
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(ListHead)->Flink;\
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{RemoveEntryList((ListHead)->Flink)}
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//
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// PLIST_ENTRY
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// RemoveTailList(
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// PLIST_ENTRY ListHead
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// );
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//
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#define RemoveTailList(ListHead) \
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(ListHead)->Blink;\
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{RemoveEntryList((ListHead)->Blink)}
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//
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// VOID
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// RemoveEntryList(
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// PLIST_ENTRY Entry
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// );
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//
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#define RemoveEntryList(Entry) {\
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PLIST_ENTRY _EX_Blink;\
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PLIST_ENTRY _EX_Flink;\
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_EX_Flink = (Entry)->Flink;\
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_EX_Blink = (Entry)->Blink;\
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_EX_Blink->Flink = _EX_Flink;\
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_EX_Flink->Blink = _EX_Blink;\
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}
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//
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// VOID
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// InsertTailList(
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// PLIST_ENTRY ListHead,
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// PLIST_ENTRY Entry
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// );
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//
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#define InsertTailList(ListHead,Entry) {\
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PLIST_ENTRY _EX_Blink;\
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PLIST_ENTRY _EX_ListHead;\
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_EX_ListHead = (ListHead);\
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_EX_Blink = _EX_ListHead->Blink;\
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(Entry)->Flink = _EX_ListHead;\
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(Entry)->Blink = _EX_Blink;\
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_EX_Blink->Flink = (Entry);\
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_EX_ListHead->Blink = (Entry);\
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}
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//
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// VOID
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// InsertHeadList(
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// PLIST_ENTRY ListHead,
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// PLIST_ENTRY Entry
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// );
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//
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#define InsertHeadList(ListHead,Entry) {\
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PLIST_ENTRY _EX_Flink;\
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PLIST_ENTRY _EX_ListHead;\
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_EX_ListHead = (ListHead);\
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_EX_Flink = _EX_ListHead->Flink;\
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(Entry)->Flink = _EX_Flink;\
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(Entry)->Blink = _EX_ListHead;\
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_EX_Flink->Blink = (Entry);\
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_EX_ListHead->Flink = (Entry);\
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}
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/************************************************************
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* Function Definitions
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************************************************************/
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//
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// Initialization and cleanup functions
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//
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DWORD InitFileHandleCache(VOID);
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DWORD CleanupFileHandleCache(VOID);
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HANDLE FcOpenFile(IN EXTENSION_CONTROL_BLOCK * pecb, IN LPCSTR pszFile);
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DWORD FcCloseFile(IN HANDLE hFile);
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BOOL FcReadFromFile(
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IN HANDLE hFile,
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OUT CHAR * pchBuffer,
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IN DWORD dwBufferSize,
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OUT LPDWORD pcbRead,
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IN OUT LPOVERLAPPED pov
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);
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# endif // _OPENF_HXX_
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/************************ End of File ***********************/
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