144 lines
2.7 KiB
C++
144 lines
2.7 KiB
C++
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/*++
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Copyright (C) Microsoft Corporation, 2000
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Module Name:
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CtxColl.hxx
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Abstract:
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Class definitions for the context handle collection.
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Author:
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Kamen Moutafov [KamenM]
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Revision History:
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KamenM Sep 2000 Created
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--*/
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#if _MSC_VER >= 1200
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#pragma once
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#endif
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#ifndef __CTXCOLL_HXX_
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#define __CTXCOLL_HXX_
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// the collection of context handles. For right now
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// a simple double linked list. For the future, we
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// have to find something more scalable for large
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// number of elements
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class ContextCollection
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{
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private:
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LIST_ENTRY ListHead;
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MUTEX CollectionMutex;
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public:
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ContextCollection (
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IN OUT RPC_STATUS *RpcStatus
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) : CollectionMutex(RpcStatus,
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TRUE, // fPreallocateSemaphore
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0 // dwSpinCount
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)
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/*++
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Routine Description:
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C-tor
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Arguments:
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RpcStatus - Must be RPC_S_OK on input. Returns either RPC_S_OK or RPC_S_OUT_OF_MEMORY.
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--*/
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{
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RpcpInitializeListHead(&ListHead);
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}
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inline void
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Lock (
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void
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)
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{
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CollectionMutex.Request();
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}
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inline void
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Unlock (
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void
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)
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{
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CollectionMutex.Clear();
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}
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inline void
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Add (
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IN ServerContextHandle *NewHandle
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)
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{
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CollectionMutex.VerifyOwned();
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RpcpfInsertHeadList(&ListHead, &NewHandle->ContextChain);
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}
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inline void
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Remove (
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IN ServerContextHandle *Handle
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)
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{
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CollectionMutex.VerifyOwned();
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RpcpfRemoveEntryList(&Handle->ContextChain);
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}
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inline ServerContextHandle *
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GetNext (
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IN OUT LIST_ENTRY **CurrentListEntry
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)
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{
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ServerContextHandle *ContextHandle;
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CollectionMutex.VerifyOwned();
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ASSERT (CurrentListEntry != NULL);
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// if we have started with NULL, return the first element
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if (*CurrentListEntry == NULL)
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{
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*CurrentListEntry = ListHead.Flink;
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}
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// if we have reached the end (or were empty to start with) return NULL
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if (*CurrentListEntry == &ListHead)
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{
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return NULL;
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}
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ContextHandle = CONTAINING_RECORD(*CurrentListEntry, ServerContextHandle, ContextChain);
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*CurrentListEntry = (*CurrentListEntry)->Flink;
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return ContextHandle;
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}
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ServerContextHandle *
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Find (
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IN WIRE_CONTEXT *WireContext
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);
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static RPC_STATUS
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AllocateContextCollection (
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OUT ContextCollection **NewColl
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);
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};
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RPC_STATUS
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NDRSContextInitializeCollection (
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IN ContextCollection **ContextCollectionPlaceholder
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);
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#endif // __CTXCOLL_HXX
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