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timer

Index


AddTime() BeginIO() CmpTime() GetSysTime()
ReadEClock() SubTime()    

AddTime()

Synopsis

void AddTime(
         struct timeval * dest,
         struct timeval * src );

Function

Add two timeval's together. The result will be the sum
dest + src --> dest.

The values of A0 and A1 will not be changed.

Inputs

dest    -   Destination timeval.
src     -   Source timeval.

Result

dest will contain (src + dest).

Notes

This function can be called from Interrupts.

BeginIO()

Synopsis

void BeginIO(
         struct timerequest * timereq );

Function

    BeginIO() will perform a timer.device command. It is normally
    called from within DoIO() and SendIO().

INPUT
    timereq         - The request to process.

Result

The requested message will be processed.

Notes

This function is safe to call from interrupts.

CmpTime()

Synopsis

LONG CmpTime(
         struct timeval * dest,
         struct timeval * src );

Function

CmpTime() will compare two timeval's for magnitude, and return
which is the larger.

Inputs

dest    -   Destination timeval
src     -   Source timeval

Result

-1 if dest has more time than src (i.e. dest > src)
 0 if dest and src are the same (i.e. dest == src)
+1 if dest has less time than src (i.e. dest < src)

Notes

This function is safe to call from interrupts.

Bugs

The registers A0 and A1 may not be preserved.

GetSysTime()

Synopsis

void GetSysTime(
         struct timeval * dest );

Function

GetSysTime() will fill in the supplied timeval with the current
system time.

Inputs

dest    -   A pointer to the timeval you want the time stored in.

Result

The timeval "dest" will be filled with the current system time.

Notes

This function is safe to call from interrupts.

ReadEClock()

Synopsis

ULONG ReadEClock(
         struct EClockVal * dest );

Function

ReadEClock() reads current value of E-Clock and stores
it in the destination EClockVal structure passed as
argument. It also returns the frequency of EClock of the
system.

This call is supposed to be very fast.

Inputs

dest    -   Destination EClockVal

Result

The EClock frequency (tics/s)

Notes

This function is safe to call from interrupts.

SubTime()

Synopsis

void SubTime(
         struct timeval * dest,
         struct timeval * src );

Function

SubTime() will subtract the src timeval from the destination
timeval, ie "dest - src --> dest".

Inputs

dest    -   Destination timeval
src     -   Source timeval

Result

The timeval dest will contain the sum (dest - src).

Notes

This function is safe to call from interrupts.

Bugs

May not preserve registers.

Docutils System Messages

System Message: ERROR/3 (/home/mazze/projects/aros-src/documentation/documentation/developers/autodocs/timer.en, line 213); backlink

Unknown target name: "tr_getsystime".

System Message: ERROR/3 (/home/mazze/projects/aros-src/documentation/documentation/developers/autodocs/timer.en, line 213); backlink

Unknown target name: "tr_setsystime".

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