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83 lines
3.4 KiB
C
83 lines
3.4 KiB
C
/*
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* PROJECT: ReactOS API tests
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* LICENSE: GPL - See COPYING in the top level directory
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* PURPOSE: Test for NtQueryTimerResolution and NtSetTimerResolution.
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* PROGRAMMER: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
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*/
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#include "precomp.h"
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START_TEST(TimerResolution)
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{
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NTSTATUS Status;
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ULONG CurrentResolution;
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ULONG MinimumResolution;
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ULONG MaximumResolution;
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ULONG CurrentResolution2;
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/* Get the current timer resolution */
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Status = NtSetTimerResolution(0, /* Ignored */
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FALSE, /* Don't change resolution */
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&CurrentResolution);
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/*
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* If the timer resolution hasn't been changed for this process,
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* it returns STATUS_TIMER_RESOLUTION_NOT_SET
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*/
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ok_hex(Status, STATUS_TIMER_RESOLUTION_NOT_SET);
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/*
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* Get the timer resolution limits and current timer resolution
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* using a different method
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*/
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Status = NtQueryTimerResolution(&MinimumResolution,
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&MaximumResolution,
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&CurrentResolution2);
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/* This function should always return STATUS_SUCCESS */
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ok_hex(Status, STATUS_SUCCESS);
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/* The MinimumResolution should be higher than the MaximumResolution */
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ok(MinimumResolution >= MaximumResolution, "MaximumResolution higher than MinimumResolution!\n");
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/* These two values should be the same */
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ok_hex(CurrentResolution, CurrentResolution2);
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/*
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* Even if you give it invalid values,
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* NtSetTimerResolution will return STATUS_SUCCESS,
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* but it will not change the resolution.
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*/
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Status = NtSetTimerResolution(MinimumResolution + 1,
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TRUE,
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&CurrentResolution);
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ok_hex(Status, STATUS_SUCCESS);
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printf("Current resolution: %lu ; minimum resolution: %lu\n", CurrentResolution, MinimumResolution);
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ok(CurrentResolution <= MinimumResolution, "Current resolution: %lu became too high! (minimum resolution: %lu)\n", CurrentResolution, MinimumResolution);
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Status = NtSetTimerResolution(MaximumResolution - 1,
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TRUE,
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&CurrentResolution);
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ok_hex(Status, STATUS_SUCCESS);
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printf("Current resolution: %lu ; maximum resolution: %lu\n", CurrentResolution, MaximumResolution);
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#if 0 // Why? This doesn't hold true on Windows Server 2003.
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ok(abs((LONG)MaximumResolution - (LONG)CurrentResolution) < 200, "Current resolution: %lu became too low! (maximum resolution: %lu)\n", CurrentResolution, MaximumResolution);
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#endif
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/* Get the current timer resolution */
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Status = NtSetTimerResolution(0, /* Ignored */
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FALSE, /* Don't change resolution */
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&CurrentResolution);
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/* Since we have changed the resolution earlier, it returns STATUS_SUCCESS. */
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ok_hex(Status, STATUS_SUCCESS);
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/* Get the current timer resolution again */
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Status = NtSetTimerResolution(0, /* Ignored */
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FALSE, /* Don't change resolution */
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&CurrentResolution);
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/* The resolution is not changed now, so it should return STATUS_TIMER_RESOLUTION_NOT_SET */
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ok_hex(Status, STATUS_TIMER_RESOLUTION_NOT_SET);
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}
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