/* On 12/14/95 at 09:09AM, Phil Crown blathered to Paul Haggart */

 > btw, I thought I saved the code, but I can't find it.  Would you please
 > repost it?

  Peter Fitzsimmons gave me a few corrections.. when I changed it to his
code, I didn't bother keeping the older stuff.  Here's what he gave me:

=== Cut - client.c ===
/* client.c - mutex semaphore test */

#define INCL_DOSSEMAPHORES
#define INCL_DOSPROCESS
#include 

#include 
#include 

int main(void)
{
    HMTX    semHandle = NULLHANDLE;
    USHORT  count;
    APIRET  rc;

    /* open semaphore */
    if(rc = DosOpenMutexSem("\\SEM32\\SEMAPHOR.SEM", &semHandle))
    {
        printf("Error #%u opening semaphore '\\SEM32\\SEMAPHOR.SEM'\n"
               "Make sure SERVER.EXE is running!\n", rc);
        return 0;
    }

    for (count = 0; count < 10000; count++)
    {
         /* check to see if the semaphore is blocked from the server */
         if (rc = DosRequestMutexSem(semHandle, -1))
         {
             printf("DosRequestMutexSem returned error #%u\n", rc);
             return 1;
         }

         /* print useless counter message */
         printf("%u\n", count);

         /* release semaphore to the open */
         DosReleaseMutexSem(semHandle);

         /* release a timeslice - increase number for more delay */
         DosSleep(5L);
    }

    return 0;
}

=== Cut ===

=== Cut - server.c ===
/* server.c - mutex semaphore test */

#define INCL_DOSSEMAPHORES
#define INCL_DOSPROCESS
#include 

#include 
#include 

int main(void)
{
    HMTX    semHandle = NULLHANDLE;
    char    ch;
    APIRET  rc;

    /* create the public semaphore */
    if (rc = DosCreateMutexSem("\\SEM32\\SEMAPHOR.SEM", &semHandle,
                                (ULONG)0, (BOOL32)0))
    {
        printf("DosCreateMutexSem returned error #%u\n", rc);
        return 1;
    }

    printf("Semaphore \\SEM32\\SEMAPHOR.SEM created successfully!\n"
           "Hit any key to pause client..\n\n");

    for (;;)
    {
        /* wait for keypress to pause client */
        ch = getch();

        /* grab semaphore from client */
        if(rc = DosRequestMutexSem(semHandle, -1))
        {
            printf("DosRequestMutexSem returned error #%u\n", rc);
            return 1;
        }
        printf("Output in client window should be paused\n");

        /* wait for keypress to start client again... */
        getch();
        printf("Output in client window should be running again\n");

        /* release semaphore to client */
        DosReleaseMutexSem(semHandle);
    }
}
=== Cut ===


// Paul - A proud member of Team OS/2 - phaggart{at}f306.n248.z1.fidonet.org
... "I wonder if it tastes like chicken?" sayeth the Lord.

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