source: trunk/testcase/1023-maxfilehandles.c@ 1360

/** @file
 *
 * Testcase for bug #1023 autoincrement of file handles.
 *
 * InnoTek Systemberatung GmbH confidential
 *
 * Copyright (c) 2004 InnoTek Systemberatung GmbH
 * Author: knut st. osmundsen <bird-srcspam@anduin.net>
 *
 * All Rights Reserved
 *
 */

/*******************************************************************************
*   Header Files                                                               *
*******************************************************************************/
#define INCL_DOS
#define INCL_DOSINFOSEG
#ifdef __IBMC__
#include "../src/emx/include/os2emx.h"
#else
#include <os2.h>
#endif
#include <stdio.h>
#include <string.h>



int main(int argc, const char **argv)
{
    int             i;
    LONG            lFHDelta = 0;
    ULONG           cFHs = 0;
    ULONG           cFHLast;
    unsigned        msLastInc;
    PGINFOSEG       pGIS = GETGINFOSEG();
#define MAX_FHS 32768
    static FILE    *apFiles[MAX_FHS];

    DosSetRelMaxFH(&lFHDelta, &cFHs);
    printf("cFHs=%d\n", cFHs);

    cFHLast = cFHs;
    msLastInc = pGIS->msecs;
    for (i = 0; i < MAX_FHS; i++)
    {
        unsigned    msEnd;
        unsigned    msStart = pGIS->msecs;
        apFiles[i] = fopen("\\dev\\nul", "rb");
        msEnd = pGIS->msecs;
        if (apFiles[i] == NULL)
        {
            printf("error %d!\n", i + 1);
            break;
        }

        lFHDelta = cFHs = 0;
        DosSetRelMaxFH(&lFHDelta, &cFHs);
        lFHDelta = cFHs = 0;
        DosSetRelMaxFH(&lFHDelta, &cFHs);
        if (cFHs != cFHLast)
        {
            printf("Max FH change %i: %d -> %d (inc: %d ms  since last: %d ms)\n", i + 1, cFHLast, cFHs,
                   msEnd - msStart, msStart - msLastInc);
            msLastInc = msEnd;
        }
        cFHLast = cFHs;
    }

    lFHDelta = cFHs = 0;
    DosSetRelMaxFH(&lFHDelta, &cFHs);
    printf("cFHs=%d\n", cFHs);
    if (i < 9900)
    {
        printf("1023-maxfilehandles: failed, could only open %d handles, expected > 9900\n", i);
        return 1;
    }

    printf("1023-maxfilehandles: succeeded opening %d handles.\n", i);
    return 0;
}