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statusCallBack - handle status output in OpenMaple
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Calling Sequence
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statusCallBack(data, kilobytesUsed, kilobytesAlloc, cpuTime)
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Parameters
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data
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user_data pointer passed to StartMaple (long)
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kilobytesUsed
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total kilobytes used (long)
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kilobytesAlloc
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total kilobytes allocated (long)
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cpuTime
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total CPU time used (double)
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Description
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The statusCallBack function is called when Maple reports resource usage information (equivalent to the "bytes used" messages in stand-alone Maple). This usually happens after every sweep of the garbage collector.
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The prototype for the function you can assign to the entry in the MapleCallBack must look like the following.
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Sub StatusCallBack(ByVal data As Long,
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ByVal kilobytesUsed As Long,
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ByVal kilobytesAlloc As Long,
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ByVal CPUTime As Double)
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The cpuTime parameter is the number of seconds of CPU time consumed since the Maple kernel was started. This includes time spent in any callback functions.
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The kilobytesUsed parameter indicates the number of kilobytes of storage allocated by the Maple internal storage manager.
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The kilobytesAlloc parameter indicates the number of kilobytes of storage allocated by the operating system by the Maple internal storage manager.
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If no statusCallBack function is specified, status information is sent to the textCallBack function in the form "bytes used=%ld, alloc=%ld, time=%1.2f", with the MAPLE_TEXT_STATUS tag.
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The data parameter contains the same data as passed to StartMaple in the user_data parameter.
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Examples
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Public Sub StatusCallBack(ByVal data As Long, ByVal kilobytesUsed As Long, _
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ByVal kilobytesAlloc As Long, ByVal CPUTime As Double)
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MainForm.BytesUsed.Text = kilobytesUsed
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MainForm.BytesAlloc.Text = kilobytesAlloc
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MainForm.CPUTime.Text = CPUTime
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End Sub
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' assignment to MapleCallback entry
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cb.lpStatusCallBack = GetProc(AddressOf StatusCallBack)
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' test statement that will invoke the CallBackCallBack
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EvalMapleStatement kv, "gc();"
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See Also
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callBackCallBack, errorCallBack, OpenMaple, OpenMaple/VB/API, OpenMaple/VB/Examples, queryInterrupt, readLineCallBack, redirectCallBack, StartMaple, streamCallBack, textCallBack
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Download Help Document
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