156 lines
2.1 KiB
C
156 lines
2.1 KiB
C
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/*++
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Copyright (c) 1995 Microsoft Corporation
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Module Name:
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worker.c
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Abstract:
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work items management functions
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Author:
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Stefan Solomon 07/11/1995
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Revision History:
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--*/
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#include "precomp.h"
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#pragma hdrstop
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/*++
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Function: CreateWorkItemsManager
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Descr: creates the work items heap
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--*/
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HANDLE WiHeapHandle;
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volatile LONG WorkItemsCount;
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DWORD
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CreateWorkItemsManager(VOID)
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{
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if((WiHeapHandle = HeapCreate(0,
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0x8000, // 32k initial size
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0x100000 // 1 meg max size
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)) == NULL) {
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return ERROR_CAN_NOT_COMPLETE;
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}
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WorkItemsCount = 0;
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return NO_ERROR;
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}
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VOID
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DestroyWorkItemsManager(VOID)
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{
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while (WorkItemsCount>0)
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SleepEx (1000, TRUE);
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HeapDestroy(WiHeapHandle);
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}
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/*++
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Function: AllocateWorkItem
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Descr: allocates the work item from the workitems heap
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The function looks at the work item type and allocates a
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packet at the end if required
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--*/
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PWORK_ITEM
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AllocateWorkItem(ULONG Type)
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{
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PWORK_ITEM wip;
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switch(Type) {
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case WITIMER_TYPE:
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if((wip = GlobalAlloc(GPTR, sizeof(WORK_ITEM))) == NULL) {
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return NULL;
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}
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break;
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default:
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if((wip = HeapAlloc(WiHeapHandle,
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HEAP_ZERO_MEMORY,
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sizeof(WORK_ITEM) + MAX_IPXWAN_PACKET_LEN)) == NULL) {
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return NULL;
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}
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}
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wip->Type = Type;
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InterlockedIncrement((PLONG)&WorkItemsCount);
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return wip;
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}
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/*++
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Function: FreeWorkItem
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Descr: frees the work item to the workitems heap
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--*/
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VOID
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FreeWorkItem(PWORK_ITEM wip)
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{
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HGLOBAL rc_global;
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BOOL rc_heap;
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switch(wip->Type) {
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case WITIMER_TYPE:
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rc_global = GlobalFree(wip);
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SS_ASSERT(rc_global == NULL);
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break;
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default:
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rc_heap = HeapFree(WiHeapHandle,
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0,
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wip);
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SS_ASSERT(rc_heap);
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break;
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}
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InterlockedDecrement((PLONG)&WorkItemsCount);
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}
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/*++
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Function: EnqueueWorkItemToWorker
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Descr: inserts a work item in the workers queue and signals the
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event
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Remark: Called with the Queues Lock held
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--*/
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VOID
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EnqueueWorkItemToWorker(PWORK_ITEM wip)
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{
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InsertTailList(&WorkersQueue, &wip->Linkage);
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SetEvent(hWaitableObject[WORKERS_QUEUE_EVENT]);
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}
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