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DosTmrQueryFreq

From EDM2
Revision as of 22:44, 19 December 2016 by Martini (talk | contribs) (Martini moved page OS2 API:CPI:DosTmrQueryFreq to DosTmrQueryFreq)

Description

Provides the frequency of the IRQ0 high resolution timer (Intel 8254).

Syntax

#define INCL_DOSPROFILE
#include <os2.h>

PULONG    pulTmrFreq;  /*  Timer Frequency. */
APIRET    rc;          /*  Return Code. */

rc = DosTmrQueryFreq(pulTmrFreq);

Parameters

pulTmrFreq (PULONG) - output
Timer Frequency.

Provides the frequency of the IRQ0 high resolution timer in hertz (timer units/sec).

Return Code

rc (APIRET) - returns

DosTmrQueryFrequency returns the following values:

  • 0 NO_ERROR
  • 87 ERROR_INVALID_PARAMETER
  • 535 ERROR_TMR_NO_DEVICE
  • 99 ERROR_DEVICE_IN_USE

Remarks

Example Code

Related Functions

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