/// <summary>
/// Estimates memory consumption
/// </summary>
/// <exception cref="InvalidOperationException">Process has exited</exception>
/// <returns></returns>
public ProcessMemoryInfo GetMemoryInfo(int pid)
{
var handle = IntPtr.Zero;
try
{
handle = ProcessUtility.OpenLimitedQueryInformationProcessHandle(pid);
EnsureProcessIsRunning(handle, pid);
if (!PsApi.GetProcessMemoryInfo(handle, out var counters))
{
Win32ExceptionUtility.Throw();
}
return(new ProcessMemoryInfo
{
// use PrivateUsage instead of PagefileUsage because PagefileUsage is always zero on Windows 7, Windows Server 2008 R2 and earlier systems
PrivateBytes = (long)counters.PrivateUsage,
WorkingSetBytes = (long)counters.WorkingSetSize
});
}
finally
{
Kernel32.CloseHandle(handle);
}
}
/// <summary>
/// Creates ProcessMemoryMeter
/// </summary>
/// <param name="processId"></param>
public ProcessMemoryMeter(int processId)
{
pid = processId;
handle = ProcessUtility.OpenLimitedQueryInformationProcessHandle(processId);
}
/// <summary>
/// Creates <see cref="ProcessCpuUsageMeter"/> for specified process.
/// </summary>
public ProcessCpuUsageMeter(int pid)
{
handle = ProcessUtility.OpenLimitedQueryInformationProcessHandle(pid);
cpuUsageMeter = new CpuUsageMeter(() => CpuUsageNativeApi.GetProcessTime(handle));
}
