Desktop/xinu_mips-1.0.2.tar/xinu_mips-1.0.2/test/test-sem2.c

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#include <kernel.h>
#include <proc.h>
#include <semaphore.h>
#include <stdio.h>

extern void testPass(const char *);
extern void testFail(const char *);

extern bool test_checkSemCount(semaphore s, short c);
extern bool test_checkProcState(ushort pid, uchar state);
extern bool test_checkResult(uchar testResult, uchar expected);

extern void test_semWaiter(semaphore s, int times, uchar *testResult);

int test_semaphore2(int argc, char **argv)
{
        ushort apid, bpid;
        bool passed = TRUE;
        semaphore s;
        uchar testResult = 0;
        char msg[50];

        printf("Test Suite: Multiple Semaphores\n");

        printf("  Semaphore creation: ");
        s = newsem(0);
        if (isbadsem(s))
        {
                passed = FALSE;
                sprintf(msg, "%d", s);
                testFail(msg);
        }
        else if (test_checkSemCount(s, 0))
        { testPass(""); }
        else
        { passed = FALSE; }

        ready(apid = create((void *)test_semWaiter, INITSTK, 31, "SEMAPHORE-A", 
                                                3, s, 1, &testResult), RESCHED_NO);
        ready(bpid = create((void *)test_semWaiter, INITSTK, 31, "SEMAPHORE-B", 
                                                3, s, 1, &testResult), RESCHED_YES);

        /* Both processes should run and immediately wait. */
        printf("  Wait on semaphore: ");
        if ( test_checkProcState(apid, PRWAIT)
                 && test_checkProcState(bpid, PRWAIT)
                 && test_checkSemCount(s, -2)
                 && test_checkResult(testResult, 0) )
        { testPass(""); }
        else
        { passed = FALSE; }

        signal(s);

        /* Process A waited first, so a signal should release it. */
        printf("  Signal first semaphore: ");
        if ( test_checkProcState(apid, PRFREE)
                 && test_checkProcState(bpid, PRWAIT)
                 && test_checkSemCount(s, -1)
                 && test_checkResult(testResult, 1) )
        { testPass(""); }
        else
        { passed = FALSE; }

        signal(s);

        /* Process B waited second, so another signal should release it. */
        printf("  Signal second semaphore: ");
        if ( test_checkProcState(bpid, PRFREE)
                 && test_checkSemCount(s, 0)
                 && test_checkResult(testResult, 2) )
        { testPass(""); }
        else
        { passed = FALSE; }

        if (TRUE == passed)
        { testPass(""); }
        else
        { testFail(""); }
                
        /* Processes should be dead, but in case the test failed. */
        kill(apid);
        kill(bpid);
        freesem(s);

        return OK;
}

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