64 lines
1.2 KiB
C
64 lines
1.2 KiB
C
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/*++
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Copyright (c) 1990 Microsoft Corporation
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Module Name:
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kdcmsup.c
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Abstract:
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Com support. Code to init a com port, store port state, map
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portable procedures to x86 procedures.
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Author:
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Bryan M. Willman (bryanwi) 24-Sep-90
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Revision History:
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Shielin Tzong (shielint) 10-Apr-91
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Add packet control protocol.
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--*/
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#include "kdp.h"
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LARGE_INTEGER
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KdpQueryPerformanceCounter (
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IN PKTRAP_FRAME TrapFrame
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);
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(PAGEKD, KdpQueryPerformanceCounter)
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#endif
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LARGE_INTEGER
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KdpQueryPerformanceCounter (
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IN PKTRAP_FRAME TrapFrame
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)
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/*++
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Routine Description:
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This function optionaly calls KeQueryPerformanceCounter for
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the debugger. If the trap had interrupts off, then no call
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to KeQueryPerformanceCounter is possible and a NULL is returned.
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Return Value:
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returns KeQueryPerformanceCounter if possible.
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otherwise 0
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--*/
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{
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if (!(TrapFrame->EFlags & EFLAGS_INTERRUPT_MASK)) {
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LARGE_INTEGER LargeIntegerZero;
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LargeIntegerZero.QuadPart = 0;
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return LargeIntegerZero;
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} else {
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return KeQueryPerformanceCounter(0);
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}
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}
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