Sample Code
Windows Driver Samples/ KMDF Echo Sample/ C++/ driver/ AutoSync/ queue.h/
/*++ Copyright (c) 1990-2000 Microsoft Corporation Module Name: queue.h Abstract: This is a C version of a very simple sample driver that illustrates how to use the driver framework and demonstrates best practices. --*/ // Set max write length for testing #define MAX_WRITE_LENGTH 1024*40 // Set timer period in ms #define TIMER_PERIOD 1000*10 // // This is the context that can be placed per queue // and would contain per queue information. // typedef struct _QUEUE_CONTEXT { // Here we allocate a buffer from a test write so it can be read back PVOID Buffer; ULONG Length; // Timer DPC for this queue WDFTIMER Timer; // Virtual I/O WDFREQUEST CurrentRequest; NTSTATUS CurrentStatus; } QUEUE_CONTEXT, *PQUEUE_CONTEXT; WDF_DECLARE_CONTEXT_TYPE_WITH_NAME(QUEUE_CONTEXT, QueueGetContext) NTSTATUS EchoQueueInitialize( WDFDEVICE hDevice ); EVT_WDF_IO_QUEUE_CONTEXT_DESTROY_CALLBACK EchoEvtIoQueueContextDestroy; // // Events from the IoQueue object // EVT_WDF_REQUEST_CANCEL EchoEvtRequestCancel; EVT_WDF_IO_QUEUE_IO_READ EchoEvtIoRead; EVT_WDF_IO_QUEUE_IO_WRITE EchoEvtIoWrite; NTSTATUS EchoTimerCreate( IN WDFTIMER* pTimer, IN ULONG Period, IN WDFQUEUE Queue ); EVT_WDF_TIMER EchoEvtTimerFunc;
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