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55 lines
1.6 KiB
C
55 lines
1.6 KiB
C
/*
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* COPYRIGHT: GPL - See COPYING in the top level directory
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* PROJECT: ReactOS Virtual DOS Machine
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* FILE: subsystems/mvdm/ntvdm/clock.h
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* PURPOSE: Clock for VDM
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* PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
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* Hermes Belusca-Maito (hermes.belusca@sfr.fr)
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*/
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#ifndef _CLOCK_H_
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#define _CLOCK_H_
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/* DEFINITIONS ****************************************************************/
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#define HARDWARE_TIMER_ENABLED (1 << 0)
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#define HARDWARE_TIMER_ONESHOT (1 << 1)
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#define HARDWARE_TIMER_PRECISE (1 << 2)
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/* Converts a frequency in Hertz into a duration in nanoseconds */
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#define HZ_TO_NS(Freq) (ULONGLONG)(1000000000ULL / (ULONGLONG)(Freq))
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typedef VOID (FASTCALL *PHARDWARE_TIMER_PROC)(ULONGLONG ElapsedTime);
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typedef struct _HARDWARE_TIMER
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{
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LIST_ENTRY Link;
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ULONG Flags;
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LONG EnableCount;
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ULONGLONG Delay;
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LARGE_INTEGER LastTick;
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PHARDWARE_TIMER_PROC Callback;
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} HARDWARE_TIMER, *PHARDWARE_TIMER;
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/* FUNCTIONS ******************************************************************/
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extern ULONGLONG CurrentCycleCount;
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extern ULONGLONG CurrentIps;
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PHARDWARE_TIMER CreateHardwareTimer
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(
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ULONG Flags,
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ULONGLONG Delay, /* nanoseconds */
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PHARDWARE_TIMER_PROC Callback
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);
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VOID EnableHardwareTimer(PHARDWARE_TIMER Timer);
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VOID DisableHardwareTimer(PHARDWARE_TIMER Timer);
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VOID SetHardwareTimerDelay(PHARDWARE_TIMER Timer, ULONGLONG NewDelay);
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VOID DestroyHardwareTimer(PHARDWARE_TIMER Timer);
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VOID ClockUpdate(VOID);
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BOOLEAN ClockInitialize(VOID);
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#endif /* _CLOCK_H_ */
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