C++ std::condition_variable类代码示例

namespace kernel
{

static std::thread
sIpcThread;

static std::atomic_bool
sIpcThreadRunning;

static std::mutex
sIpcMutex;

static std::condition_variable
sIpcCond;

static std::queue<IPCBuffer *>
sIpcRequests;

static std::queue<IPCBuffer *>
sIpcResponses[3];

static void
ipcThreadEntry();


/**
 * Start the IPC thread.
 */
void
ipcStart()
{
   std::unique_lock<std::mutex> lock { sIpcMutex };
   sIpcThreadRunning.store(true);
   sIpcThread = std::thread { ipcThreadEntry };
}


/**
 * Stop the IPC thread.
 */
void
ipcShutdown()
{
   std::unique_lock<std::mutex> lock { sIpcMutex };

   if (sIpcThreadRunning.exchange(false)) {
      sIpcCond.notify_all();
      lock.unlock();

      sIpcThread.join();
   }
}


/**
 * Submit an buffer to the IPC queue.
 */
void
ipcDriverKernelSubmitRequest(IPCBuffer *buffer)
{
   switch (cpu::this_core::id()) {
   case 0:
      buffer->cpuId = IOSCpuId::PPC0;
      break;
   case 1:
      buffer->cpuId = IOSCpuId::PPC1;
      break;
   case 2:
      buffer->cpuId = IOSCpuId::PPC2;
      break;
   default:
      decaf_abort("Unexpected core id");
   }

   sIpcMutex.lock();
   sIpcRequests.push(buffer);
   sIpcCond.notify_all();
   sIpcMutex.unlock();
}


/**
 * Handle PPC interrupt for when we have IPC responses to dispatch.
 */
void
ipcDriverKernelHandleInterrupt()
{
   auto driver = coreinit::internal::getIPCDriver();
   auto &responses = sIpcResponses[driver->coreId];

   // Copy respones to IPCDriver structure
   sIpcMutex.lock();

   while (responses.size()) {
      driver->responses[driver->numResponses] = responses.front();
      driver->numResponses++;
      responses.pop();
   }

   sIpcMutex.unlock();
//.........这里部分代码省略.........

namespace glws {
static char TAG[]="apitrace";

static JavaVM *s_javaVM = nullptr;
static jobject s_activityObject = nullptr;
static std::mutex s_activityObjectMutex;

static jmethodID s_setSurfaceSizeMethodID = nullptr;

static jfieldID s_descriptor = nullptr;

typedef std::shared_ptr<ANativeWindow> AndroidWindow;
static AndroidWindow s_currentNativeWindow;
static std::atomic_int s_currentNativeWindowId(0);
static std::mutex s_currentNativeWindowMutex;

static int s_stdout_fd = -1;
static int s_stderr_fd = -1;
static std::mutex s_stateMutex;
static std::condition_variable s_stateWait;

static EGLDisplay eglDisplay = EGL_NO_DISPLAY;
static char const *eglExtensions = NULL;
static bool has_EGL_KHR_create_context = false;
struct ResourceTracker;

static std::mutex s_resourcesMutex;
static std::vector<ResourceTracker*> s_resources;

class FdWriter : public std::streambuf
{
public:
    FdWriter(int fd)
    {
        m_fd = fd;
        int opts = fcntl(m_fd, F_GETFL);
        opts = opts & (~O_NONBLOCK);
        fcntl(m_fd, F_SETFL, opts);
    }

    // basic_streambuf interface
protected:
    std::streamsize xsputn(const char_type *__s, std::streamsize __n)
    {
        std::streamsize ret = 0;
        while( __n ) {
            ssize_t written = write(m_fd, __s, __n);
            if (written > 0) {
                __n -= written;
                __s += written;
                ret += written;
            } else {
                switch (errno) {
                case EBADF:
                case EINVAL:
                case EPIPE:
                    std::exit(1);
                    break;
                }
            }
        }
        return ret;
    }

    int_type overflow(int_type __c)
    {
        return xsputn(reinterpret_cast<const char_type *>(&__c), 1) == 1 ? __c : traits_type::eof();
    }

private:
    int m_fd = -1;
};

static EGLenum
translateAPI(glfeatures::Profile profile)
{
    switch (profile.api) {
    case glfeatures::API_GL:
        return EGL_OPENGL_API;
    case glfeatures::API_GLES:
        return EGL_OPENGL_ES_API;
    default:
        assert(0);
        return EGL_NONE;
    }
}


/* Must be called before
 *
 * - eglCreateContext
 * - eglGetCurrentContext
 * - eglGetCurrentDisplay
 * - eglGetCurrentSurface
 * - eglMakeCurrent (when its ctx parameter is EGL_NO_CONTEXT ),
 * - eglWaitClient
 * - eglWaitNative
 */
static void
bindAPI(EGLenum api)
//.........这里部分代码省略.........

//.........这里部分代码省略.........
        str_errs += "нет включения М2\n";
    if (errs.fault_m3)
        str_errs += "нет включения М3\n";
    if (errs.fault_m4)
        str_errs += "нет включения М4\n";
    if (errs.fault_m5)
        str_errs += "нет включения М5\n";
    if (errs.fault_m6)
        str_errs += "нет включения М6\n";
    if (errs.fault_m8)
        str_errs += "нет включения М8\n";
    if (errs.fault_m10)
        str_errs += "нет включения М10\n";
    if (errs.fault_m12)
        str_errs += "нет включения М12\n";
    if (errs.fault_phasing)
        str_errs += "не правильная фазировка\n";
    if (errs.p_no)
        str_errs += "давление в системе не установилось\n";
    if (errs.p_upr_no)
        str_errs += "давление в канале Х не установилось\n";
    if (errs.q_no)
        str_errs += "расход не установился\n";
    if (errs.v_no)
        str_errs += "Напряжение не в допуске\n";
    if (errs.fault_p_op12)
        str_errs += "Аварийное давление\n";
    if (errs.fault_p_op22)
        str_errs += "Аварийное давление\n";

    return str_errs;
}

std::condition_variable CondVar;

TestCommonData::TestCommonData( TestCase* test_case, QString const& name, uint8_t number, uint8_t id ):
    test::Test( test_case, name, number, id ),
    OilTemp(0),
    mCommand( cpu::CpuMemory::Instance().DB31 )
{}

QJsonObject TestCommonData::Serialise() const
{
    QJsonObject obj;
    obj.insert("OilTemp", OilTemp );
    obj.insert("TestingTime", TestingTime );

    return obj;
}
bool TestCommonData::Deserialize( QJsonObject const& obj )
{
    OilTemp = obj.value("OilTemp").toDouble();
    TestingTime = obj.value("TestingTime").toInt();
    return true;
}

uint8_t TestCommonData::CommandID()
{
    return mId;
}
void TestCommonData::Start()
{
    mCommand.N_Operation = CommandID();
    mCommand.Start_Oper = true;
    mCommand.Stop_Oper = false;
    mCommand.Nasos_M2 = app::Settings::Instance().MainPupm() == "M2";

 void close() noexcept {
     std::unique_lock< std::mutex > lk{ mtx_ };
     closed_.store( true, std::memory_order_release);
     not_full_cnd_.notify_all();
     not_empty_cnd_.notify_all();
 }

 std::shared_ptr<T> wait_pop()
 {
     std::unique_lock<std::mutex> lock(_mtx);
     _data_cond.wait(lock, [this]() { return _terminate || !_data.empty(); });
     return _pop();
 }

 void push(T&& new_value)
 {
     std::lock_guard<std::mutex> lock(_mtx);
     _data.push(std::move(new_value));
     _data_cond.notify_one();
 }

 void Signal(void) {
   (std::lock_guard<std::mutex>)m_lock,
   (m_shouldContinue = true),
   s_continueCond.notify_all();
 }

 void notify()
 {
     std::lock_guard<std::mutex> lock(_mtx);
     _data_cond.notify_all();
 }

void cancelAbort() {
  std::unique_lock<std::mutex> lk(abortMutex);
  abortCondVar.notify_one();
}

void mainLoader(int, char*[], ServiceManager* services)
{
    //dispatcher thread
    g_game.setGameState(GAME_STATE_STARTUP);

    srand(static_cast<unsigned int>(OTSYS_TIME()));
#ifdef _WIN32
    SetConsoleTitle(STATUS_SERVER_NAME);
#endif
    std::cout << STATUS_SERVER_NAME << " - Version " << STATUS_SERVER_VERSION << std::endl;
    std::cout << "Compiled with " << BOOST_COMPILER << std::endl;
    std::cout << "Compiled on " << __DATE__ << ' ' << __TIME__ << " for platform ";

#if defined(__amd64__) || defined(_M_X64)
    std::cout << "x64" << std::endl;
#elif defined(__i386__) || defined(_M_IX86) || defined(_X86_)
    std::cout << "x86" << std::endl;
#elif defined(__arm__)
    std::cout << "ARM" << std::endl;
#else
    std::cout << "unknown" << std::endl;
#endif
    std::cout << std::endl;

    std::cout << "A server developed by " << STATUS_SERVER_DEVELOPERS << std::endl;
    std::cout << "Visit our forum for updates, support, and resources: http://otland.net/." << std::endl;
    std::cout << std::endl;

    // read global config
    std::cout << ">> Loading config" << std::endl;
    if (!g_config.load()) {
        startupErrorMessage("Unable to load config.lua!");
        return;
    }

#ifdef _WIN32
    const std::string& defaultPriority = g_config.getString(ConfigManager::DEFAULT_PRIORITY);
    if (strcasecmp(defaultPriority.c_str(), "high") == 0) {
        SetPriorityClass(GetCurrentProcess(), HIGH_PRIORITY_CLASS);
    } else if (strcasecmp(defaultPriority.c_str(), "above-normal") == 0) {
        SetPriorityClass(GetCurrentProcess(), ABOVE_NORMAL_PRIORITY_CLASS);
    }
#endif

    //set RSA key
    const char* p("14299623962416399520070177382898895550795403345466153217470516082934737582776038882967213386204600674145392845853859217990626450972452084065728686565928113");
    const char* q("7630979195970404721891201847792002125535401292779123937207447574596692788513647179235335529307251350570728407373705564708871762033017096809910315212884101");
    g_RSA.setKey(p, q);

    std::cout << ">> Establishing database connection..." << std::flush;

    Database* db = Database::getInstance();
    if (!db->connect()) {
        startupErrorMessage("Failed to connect to database.");
        return;
    }

    std::cout << " MySQL " << Database::getClientVersion() << std::endl;

    // run database manager
    std::cout << ">> Running database manager" << std::endl;

    if (!DatabaseManager::isDatabaseSetup()) {
        startupErrorMessage("The database you have specified in config.lua is empty, please import the schema.sql to your database.");
        return;
    }
    g_databaseTasks.start();

    DatabaseManager::updateDatabase();

    if (g_config.getBoolean(ConfigManager::OPTIMIZE_DATABASE) && !DatabaseManager::optimizeTables()) {
        std::cout << "> No tables were optimized." << std::endl;
    }

    //load vocations
    std::cout << ">> Loading vocations" << std::endl;
    if (!g_vocations.loadFromXml()) {
        startupErrorMessage("Unable to load vocations!");
        return;
    }

    // load item data
    std::cout << ">> Loading items" << std::endl;
    if (Item::items.loadFromOtb("data/items/items.otb") != ERROR_NONE) {
        startupErrorMessage("Unable to load items (OTB)!");
        return;
    }

    if (!Item::items.loadFromXml()) {
        startupErrorMessage("Unable to load items (XML)!");
        return;
    }

    std::cout << ">> Loading script systems" << std::endl;
    if (!ScriptingManager::getInstance()->loadScriptSystems()) {
        startupErrorMessage("Failed to load script systems");
        return;
    }

    std::cout << ">> Loading monsters" << std::endl;
//.........这里部分代码省略.........

void go() {
	std::unique_lock<std::mutex> lck(mtx);
	ready = true;
	cv.notify_all();
}

 int up() {
     std::lock_guard<std::mutex> lock(mtx);
     if (++value > 0)
         cv.notify_one();
     return value;
 }

 /**
  * Wakes up the worker if it was sleeping because it didn't have anything
  * to do.
  */
 inline void wakeUp() {
     _cv.notify_one();
 }

void print_id(int id) {
	std::unique_lock<std::mutex> lck(mtx);
	while (!ready) cv.wait(lck);
	// ...
	std::cout << "thread " << id << '\n';
}

int main(int argc, char* argv[])
{
    ostringstream requestURI;
    requestURI << OC_RSRVD_WELL_KNOWN_URI << "?rt=a.collection";

    PlatformConfig config
    { OC::ServiceType::InProc, ModeType::Client, "0.0.0.0", 0, OC::QualityOfService::LowQos };

    bool isRun = true;

    try
    {
        OCPlatform::Configure(config);

        string resourceTypeName = "a.collection";

        OCPlatform::findResource("", requestURI.str(),
                                 CT_DEFAULT, &foundResource);

        //Non-intensive block until foundResource callback is called by OCPlatform
        //and onGet gets resource.
        //isResourceReady takes care of spurious wake-up

        std::unique_lock<std::mutex> lock(blocker);
        cv.wait(lock, isResourceReady);

        isReady = false;
        while (isRun)
        {
            int selectedMenu;

            cout << endl <<  "0 :: Quit 1 :: CREATE ACTIONSET 2 :: EXECUTE ACTION SET \n";
            cout << "3 :: GET ACTIONSET 4 :: DELETE ACTIONSET \n" << endl;

            cin >> selectedMenu;
            OCRepresentation rep;
            string actionsetDesc;

            switch(selectedMenu)
            {
                case 0:
                    isRun = false;
                    break;
                case 1:
                    actionsetDesc = buildActionSetDesc();
                    if(!actionsetDesc.empty())
                    {
                        cout << "ActionSet :: " << actionsetDesc << endl;
                        rep.setValue("ActionSet", actionsetDesc);
                    }
                    if (g_resource)
                    {
                        g_resource->put("a.collection", GROUP_INTERFACE, rep, QueryParamsMap(),
                        &onPut);
                    }
                    break;
                case 2:
                    rep.setValue(DO_ACTION, std::string("allbulboff"));
                    if (g_resource)
                    {
                        g_resource->post("a.collection", GROUP_INTERFACE, rep, QueryParamsMap(),
                                         &onPost);
                     }
                     break;
                case 3:
                    rep.setValue(GET_ACTIONSET, std::string("allbulboff"));
                    if (g_resource)
                    {
                        g_resource->post("a.collection", GROUP_INTERFACE, rep, QueryParamsMap(),
                                &onPost);
                    }
                    break;
                case 4:
                    rep.setValue("DelActionSet", std::string("allbulboff"));
                    if (g_resource)
                    {
                        g_resource->put("a.collection", GROUP_INTERFACE, rep, QueryParamsMap(),
                                &onPut);
                    }
                    break;
                default:
                    cout << "Invalid option" << endl;
                    break;
            }
            fflush(stdin);
        }
    }
    catch (OCException& e)
    {
        cout << e.what() << endl;
    }
    return 0;
}