Using Win32 functions in Visual FoxPro Image Gallery
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More code examples    Listed functions    Add comment     W32 Constants      Translate this page Printer friendly version of this code sample
 
#DEFINE PROCESS_QUERY_INFORMATION 0x0400
#DEFINE PROCESS_VM_READ 4
DO declare
 
* retrieve a handle to the current process
hProcess = OpenProcess(;
    BITOR(PROCESS_QUERY_INFORMATION,PROCESS_VM_READ),;
    0, GetCurrentProcessId()) && application.ProcessId
 
IF hProcess = 0
    ? "OpenProcess failed:", GetLastError()
    RETURN
ENDIF
 
LOCAL cBuffer
cBuffer = REPLICATE(CHR(0), 48)
= GetProcessIoCounters(hProcess, @cBuffer)
 
? "ReadOperationCount:", buf64ToNum(SUBSTR(cBuffer,1,8))
? "WriteOperationCount:", buf64ToNum(SUBSTR(cBuffer,9,8))
? "OtherOperationCount:", buf64ToNum(SUBSTR(cBuffer,17,8))
? "ReadTransferCount:", buf64ToNum(SUBSTR(cBuffer,25,8))
? "WriteTransferCount:", buf64ToNum(SUBSTR(cBuffer,33,8))
? "OtherTransferCount:", buf64ToNum(SUBSTR(cBuffer,41,8))
 
= CloseHandle(hProcess)
* end of main
 
FUNCTION buf64ToNum(cBuffer)
    LOCAL nLo, nHi
    nLo = buf2dword(SUBSTR(cBuffer,1,4))
    nHi = buf2dword(SUBSTR(cBuffer,5,4))
RETURN m.nLo + m.nHi * (0xffffffff+1)
 
FUNCTION buf2dword(lcBuffer)
RETURN Asc(SUBSTR(lcBuffer, 1,1)) + ;
    BitLShift(Asc(SUBSTR(lcBuffer, 2,1)),  8) +;
    BitLShift(Asc(SUBSTR(lcBuffer, 3,1)), 16) +;
    BitLShift(Asc(SUBSTR(lcBuffer, 4,1)), 24)
 
PROCEDURE declare
    DECLARE INTEGER GetLastError IN kernel32
    DECLARE INTEGER GetCurrentProcessId IN kernel32
    DECLARE INTEGER CloseHandle IN kernel32 INTEGER hObject
 
    DECLARE INTEGER OpenProcess IN kernel32;
        INTEGER dwDesiredAccess,;
        INTEGER bInheritHandle, INTEGER dwProcId
 
    DECLARE INTEGER GetProcessIoCounters IN kernel32;
        INTEGER hProcess, STRING @lpIoCounters
 

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1586 bytes  
Created: 2008-03-26 17:14:26  
Modified: 2008-03-26 17:16:36  
Visits in 7 days: 8  
Listed functions:
CloseHandle
GetCurrentProcessId
GetLastError
GetProcessIoCounters
OpenProcess
Printer friendly API declarations
My comment:
The IO_COUNTERS structure contains I/O accounting information for a process or a job object. For a job object, the counters include all operations performed by all processes that have ever been associated with the job, in addition to all processes currently associated with the job.
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