205 lines
3.4 KiB
C
205 lines
3.4 KiB
C
/*++
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Copyright (c) 1994 Microsoft Corporation
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Module Name:
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session.h
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Abstract:
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Manifests, macros, types, prototypes for session.c
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Author:
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Richard L Firth (rfirth) 25-Oct-1994
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Revision History:
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25-Oct-1994 rfirth
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Created
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--*/
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#if defined(__cplusplus)
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extern "C" {
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#endif
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//
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// types
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//
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//
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// SESSION_INFO - describes a session with a gopher server. We will keep a cache
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// of these. Only one 'conversation' can be active at any one time with a gopher
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// server. Threads must wait on the mutex handle
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//
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typedef struct _SESSION_INFO {
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//
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// List - SESSION_INFOs are maintained on double-linked list
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//
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LIST_ENTRY List;
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//
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// ReferenceCount - used to keep this session alive when there are
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// concurrent creates/deletes on different threads
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//
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LONG ReferenceCount;
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//
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// Handle - identifies this session to the application
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//
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HANDLE Handle;
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//
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// Flags - various control flags. See below
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//
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DWORD Flags;
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//
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// Host - name of host with which we have a connection
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//
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LPSTR Host;
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//
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// Port - port number at which gopher server listens at Host
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//
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DWORD Port;
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//
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// FindList - protected, doubly-linked list of VIEW_INFO 'object's generated
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// by gopher directory requests
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//
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SERIALIZED_LIST FindList;
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//
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// FileList - protected, doubly-linked list of VIEW_INFO 'object's generated
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// by gopher document (file) requests
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//
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SERIALIZED_LIST FileList;
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} SESSION_INFO, *LPSESSION_INFO;
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//
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// SESSION_INFO flags
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//
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#define SI_GOPHER_PLUS 0x00000001 // gopher server at Host is gopher+
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#define SI_CLEANUP 0x00000002 // set by CleanupSession()
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#define SI_PERSISTENT 0x80000000 // connection to gopher server kept alive
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//
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// macros
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//
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#define UNKNOWN_GOPHER(session) ((session)->Flags & (SI_GOPHER_ZERO | SI_GOPHER_PLUS) == 0)
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//
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// public data
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//
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extern SERIALIZED_LIST SessionList;
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DEBUG_DATA_EXTERN(LONG, NumberOfSessions);
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//
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// prototypes
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//
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VOID
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AcquireSessionLock(
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VOID
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);
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VOID
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ReleaseSessionLock(
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VOID
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);
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VOID
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CleanupSessions(
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VOID
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);
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LPSESSION_INFO
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FindOrCreateSession(
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IN LPSTR Host,
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IN DWORD Port,
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OUT LPDWORD Error
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);
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VOID
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ReferenceSession(
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IN LPSESSION_INFO SessionInfo
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);
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LPSESSION_INFO
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DereferenceSession(
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IN LPSESSION_INFO SessionInfo
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);
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VOID
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AcquireViewLock(
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IN LPSESSION_INFO SessionInfo,
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IN VIEW_TYPE ViewType
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);
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VOID
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ReleaseViewLock(
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IN LPSESSION_INFO SessionInfo,
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IN VIEW_TYPE ViewType
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);
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DWORD
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GopherTransaction(
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IN LPVIEW_INFO ViewInfo
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);
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BOOL
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IsGopherPlusSession(
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IN LPSESSION_INFO SessionInfo
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);
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DWORD
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SearchSessionsForAttribute(
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IN LPSTR Locator,
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IN LPSTR Attribute,
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IN LPBYTE Buffer,
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IN OUT LPDWORD BufferLength
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);
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//
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// macros
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//
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#if INET_DEBUG
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#define SESSION_CREATED() ++NumberOfBuffers
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#define SESSION_DESTROYED() --NumberOfBuffers
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#define ASSERT_NO_SESSIONS() \
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if (NumberOfSessions != 0) { \
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INET_ASSERT(FALSE); \
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}
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#else
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#define SESSION_CREATED() /* NOTHING */
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#define SESSION_DESTROYED() /* NOTHING */
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#define ASSERT_NO_SESSIONS() /* NOTHING */
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#endif
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#if defined(__cplusplus)
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}
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#endif
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