C++ (Cpp) ScheduleYield示例

示例#1

文件： Fence11.cpp 项目： Wafflespeanut/gecko-dev

gl::Error FenceNV11::finish()
{
    GLboolean finished = GL_FALSE;

    int loopCount = 0;
    while (finished != GL_TRUE)
    {
        loopCount++;
        ANGLE_TRY(FenceTestHelper(this, true, &finished));

        if (loopCount % kDeviceLostCheckPeriod == 0 && mRenderer->testDeviceLost())
        {
            return gl::Error(GL_OUT_OF_MEMORY,
                             "Device was lost while querying result of an event query.");
        }

        ScheduleYield();
    }

    return gl::NoError();
}

示例#2

文件： Query11.cpp 项目： RSATom/Qt

gl::Error Query11::getResultBase(T *params)
{
    while (!mQueryFinished)
    {
        gl::Error error = testQuery();
        if (error.isError())
        {
            return error;
        }

        if (!mQueryFinished)
        {
            ScheduleYield();
        }
    }

    ASSERT(mQueryFinished);
    *params = static_cast<T>(mResult);

    return gl::Error(GL_NO_ERROR);
}

示例#3

文件： Fence11.cpp 项目： Wafflespeanut/gecko-dev

gl::Error FenceSync11::clientWait(GLbitfield flags, GLuint64 timeout, GLenum *outResult)
{
    ASSERT(outResult);

    bool flushCommandBuffer = ((flags & GL_SYNC_FLUSH_COMMANDS_BIT) != 0);

    GLboolean result = GL_FALSE;
    gl::Error error  = FenceTestHelper(this, flushCommandBuffer, &result);
    if (error.isError())
    {
        *outResult = GL_WAIT_FAILED;
        return error;
    }

    if (result == GL_TRUE)
    {
        *outResult = GL_ALREADY_SIGNALED;
        return gl::Error(GL_NO_ERROR);
    }

    if (timeout == 0)
    {
        *outResult = GL_TIMEOUT_EXPIRED;
        return gl::Error(GL_NO_ERROR);
    }

    LARGE_INTEGER currentCounter = {};
    BOOL success                 = QueryPerformanceCounter(&currentCounter);
    ASSERT(success);

    LONGLONG timeoutInSeconds = static_cast<LONGLONG>(timeout) * static_cast<LONGLONG>(1000000ll);
    LONGLONG endCounter       = currentCounter.QuadPart + mCounterFrequency * timeoutInSeconds;

    int loopCount = 0;
    while (currentCounter.QuadPart < endCounter && !result)
    {
        loopCount++;
        ScheduleYield();
        success = QueryPerformanceCounter(&currentCounter);
        ASSERT(success);

        error = FenceTestHelper(this, flushCommandBuffer, &result);
        if (error.isError())
        {
            *outResult = GL_WAIT_FAILED;
            return error;
        }

        if ((loopCount % kDeviceLostCheckPeriod) == 0 && mRenderer->testDeviceLost())
        {
            *outResult = GL_WAIT_FAILED;
            return gl::Error(GL_OUT_OF_MEMORY,
                             "Device was lost while querying result of an event query.");
        }
    }

    if (currentCounter.QuadPart >= endCounter)
    {
        *outResult = GL_TIMEOUT_EXPIRED;
    }
    else
    {
        *outResult = GL_CONDITION_SATISFIED;
    }

    return gl::Error(GL_NO_ERROR);
}