Getting Current Usage Values

The following example shows how to get the usage and peak usage values for a directory that is limited by a quota.


#include <windows.h>
#include <stdio.h>
#include <comutil.h>
#include <FsrmQuota.h>  // Quota objects
#include <FsrmTlb.h>    // Contains CLSIDs.

// Get the usage and peak usage values for a directory.

void wmain(void)
{
    HRESULT hr = S_OK;
    IFsrmQuotaManager* pqm = NULL;
    IFsrmQuota* pQuota = NULL;
    VARIANT var;
    DATE date;
    SYSTEMTIME st;

    hr = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);
    if (FAILED(hr))
    {
        wprintf(L"CoInitializeEx() failed, 0x%x.\n", hr);
        return;
    }

    hr = CoCreateInstance(CLSID_FsrmQuotaManager, 
        NULL,
        CLSCTX_LOCAL_SERVER,
        __uuidof(IFsrmQuotaManager),
        reinterpret_cast<void**> (&pqm));

    if (FAILED(hr))
    {
        wprintf(L"CoCreateInstance(FsrmQuotaManager) failed, 0x%x.\n", hr);
        if (E_ACCESSDENIED == hr)
            wprintf(L"Access denied. You must run the client with an elevated token.\n");

        goto cleanup;
    }

    // Get the quota that applies to the specified directory.
    hr = pqm->GetQuota(_bstr_t(L"c:\\folder\\A"), &pQuota);
    if (FAILED(hr))
    {
        wprintf(L"pqm->GetQuota failed, 0x%x.\n", hr);
        goto cleanup;
    }

    VariantInit(&var);

    // Get the quota limit.
    hr = pQuota->get_QuotaLimit(&var);
    if (FAILED(hr))
    {
        wprintf(L"pQuota->get_QuotaLimit failed, 0x%x.\n", hr);
        goto cleanup;
    }

    wprintf(L"Limit: %I64u\n", var.ullVal);
    VariantClear(&var);

    // Get the amount of disk space usage charged to this quota.
    hr = pQuota->get_QuotaUsed(&var);
    if (FAILED(hr))
    {
        wprintf(L"pQuota->get_QuotaUsed failed, 0x%x.\n", hr);
        goto cleanup;
    }

    wprintf(L"Used: %I64u\n", var.ullVal);
    VariantClear(&var);

    // Get the highest amount of disk space usage charged to this quota.
    hr = pQuota->get_QuotaPeakUsage(&var);
    if (FAILED(hr))
    {
        wprintf(L"pQuota->get_QuotaPeakUsage failed, 0x%x.\n", hr);
        goto cleanup;
    }

    wprintf(L"PeakUsage: %I64u\n", var.ullVal);

    // Get the date and time when the peak usage occurred.
    hr = pQuota->get_QuotaPeakUsageTime(&date);
    if (FAILED(hr))
    {
        wprintf(L"pQuota->get_QuotaPeakUsageTime failed, 0x%x.\n", hr);
        goto cleanup;
    }

    if (VariantTimeToSystemTime(date, &st))
        wprintf(L"Peak usage occurred on %d\\%d\\%d at %d:%d", st.wMonth, st.wDay, st.wYear, st.wHour, st.wMinute);

cleanup:

    if (pqm)
        pqm->Release();

    if (pQuota)
        pQuota->Release();

    VariantClear(&var);

    CoUninitialize();
}


 

 

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