source: vbox/trunk/src/libs/xpcom18a4/xpcom/tests/TestAutoLock.cpp@ 102103

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/*

  Some tests for nsAutoLock.

 */

#include "nsAutoLock.h"

#include <iprt/assert.h>
#include <iprt/errcore.h>
#include <iprt/initterm.h>
#include <iprt/message.h>
#include <iprt/thread.h>

RTSEMFASTMUTEX gLock;
int gCount;

static DECLCALLBACK(int) run(RTTHREAD hSelf, void* arg)
{
    RT_NOREF(hSelf, arg);

    for (int i = 0; i < 1000000; ++i) {
        nsAutoLock guard(gLock);
        ++gCount;
        AssertRelease(gCount == 1);
        --gCount;
    }

    return VINF_SUCCESS;
}


int main(int argc, char** argv)
{
    int vrc = RTR3InitExe(argc, &argv, 0);
    if (RT_FAILURE(vrc))
        return RTMsgInitFailure(vrc);

    vrc = RTSemFastMutexCreate(&gLock);
    if (RT_FAILURE(vrc))
        return RTMsgInitFailure(vrc);

    gCount = 0;

    // This shouldn't compile
    //nsAutoLock* l1 = new nsAutoLock(theLock);
    //delete l1;

    // Create a block-scoped lock. This should compile.
    {
        nsAutoLock l2(gLock);
    }

    // Fork a thread to access the shared variable in a tight loop
    RTTHREAD hThread = NIL_RTTHREAD;
    vrc = RTThreadCreate(&hThread, run, NULL, 0 /*cbStack*/,
                         RTTHREADTYPE_IO, RTTHREADFLAGS_WAITABLE, "AutoLockTest");

    // ...and now do the same thing ourselves
    run(NIL_RTTHREAD, nsnull);

    // Wait for the background thread to finish, if necessary.
    int rcThread;
    RTThreadWait(hThread, RT_INDEFINITE_WAIT, &rcThread);
    AssertRC(rcThread);

    RTSemFastMutexDestroy(gLock);

    return 0;
}