TestWaitForChangeCountGreater

Syntax

long TestWaitForChangeCountGreater(COValue value, qword count, dword timeoutMs)

Function

Waits for the change counter of a communication object value to reach a certain value. Each CO value contains a change counter which is reset to 0 at measurement start and with explicit calls tovalueEntity::ResetValueState. You can read out the counter withvalueEntity::GetChangeCount.

Parameters

COValue Value of a communication object.

count

Change count to be reached.

timeoutMS

Timeout in milliseconds.

Return Values

-2: Resume due to constraint violation

-1: General error, for example, functionality is not available

0: Resume due to timeout

1: resume due to event occurred (value has changed)

long ret;consumedEventRef * anEvent;anEvent = lookupConsumedEvent(path);// ...ret = testWaitForChangeCountGreater(anEvent, anEvent.GetChangeCount() + 3, 200);

[TestWaitForChangeFlag](/en/syntax/communication-objects/misc/testwaitforchangeflag) | [TestWaitForChange](/en/syntax/communication-objects/misc/testwaitforchange) | [TestWaitForUpdateCountGreater](/en/syntax/communication-objects/misc/testwaitforupdatecountgreater)