Merge pull request 'condvar_use' (#82) from condvar_use into master

Reviewed-on: https://git.shs.tools/SHS/pip/pulls/82

libs/main/core/pibase.h

@@ -285,10 +285,10 @@
 #define FOREVER for (;;)
 
 //! Macro used for infinite wait
-#define FOREVER_WAIT FOREVER msleep(PIP_MIN_MSLEEP);
+#define FOREVER_WAIT FOREVER piMinSleep;
 
 //! Macro used for infinite wait
-#define WAIT_FOREVER FOREVER msleep(PIP_MIN_MSLEEP);
+#define WAIT_FOREVER FOREVER piMinSleep;
 
 
 //! global variable enabling output to piCout, default is true

libs/main/core/piobject.cpp

@@ -698,28 +698,30 @@ bool PIObject::Connection::disconnect() {
 PRIVATE_DEFINITION_START(PIObject::Deleter)
 	PIThread thread;
 	PIConditionVariable cond_var;
-	PIMutex cond_mutex, queue_mutex;
 	PIVector<PIObject*> obj_queue;
 PRIVATE_DEFINITION_END(PIObject::Deleter)
 
 
 PIObject::Deleter::Deleter() {
 	//piCout << "Deleter start ...";
-	stopping = started = posted = false;
-	CONNECTL(&(PRIVATE->thread), started, [this](){proc();});
-	PRIVATE->thread.startOnce();
-	while (!started) piMSleep(1);
+	PRIVATE->thread.setSlot([this](){
+		PIVector<PIObject*> oq;
+		PRIVATE->thread.lock();
+		while(PRIVATE->obj_queue.isEmpty()) PRIVATE->cond_var.wait(PRIVATE->thread.mutex());
+		oq.swap(PRIVATE->obj_queue);
+		PRIVATE->thread.unlock();
+		for (PIObject * o : oq) deleteObject(o);
+	});
+	PRIVATE->thread.start();
 }
 
 
 PIObject::Deleter::~Deleter() {
 	//piCout << "~Deleter ...";
-	stopping = true;
+	PRIVATE->thread.stop();
 	PRIVATE->cond_var.notifyAll();
-#ifndef WINDOWS
-	while (PRIVATE->thread.isRunning()) piMSleep(1);
-#endif
-	deleteAll();
+	PRIVATE->thread.waitForFinish();
+	for (PIObject * o : PRIVATE->obj_queue) deleteObject(o);
 	//piCout << "~Deleter ok";
 }
 
@@ -733,46 +735,13 @@ PIObject::Deleter * PIObject::Deleter::instance() {
 void PIObject::Deleter::post(PIObject * o) {
 	if (!o->isPIObject()) return;
 	//piCout << "[Deleter] post" << o << "...";
-	PRIVATE->queue_mutex.lock();
-	if (!PRIVATE->obj_queue.contains(o))
+	PRIVATE->thread.lock();
+	if (!PRIVATE->obj_queue.contains(o)) {
 		PRIVATE->obj_queue << o;
-	PRIVATE->queue_mutex.unlock();
-	PRIVATE->cond_var.notifyAll();
-	posted = true;
-	//piCout << "[Deleter] post" << o << "done";
-}
-
-
-void PIObject::Deleter::proc() {
-	//piCout << "[Deleter] proc start";
-	while (!stopping) {
-		//piMSleep(1);
-		//piCout << "[Deleter] proc wait ...";
-		if (posted) {
-			posted = false;
-			started = true;
-		} else {
-			PRIVATE->cond_mutex.lock();
-			started = true;
-			PRIVATE->cond_var.wait(PRIVATE->cond_mutex);
-			PRIVATE->cond_mutex.unlock();
-		}
-		//piCout << "[Deleter] proc wait done";
-		deleteAll();
+		PRIVATE->cond_var.notifyAll();
 	}
-	//piCout << "[Deleter] proc end ok";
-}
-
-
-void PIObject::Deleter::deleteAll() {
-	PIVector<PIObject*> oq;
-	PRIVATE->queue_mutex.lock();
-	oq = PRIVATE->obj_queue;
-	//piCout << "[Deleter] deleteAll" << oq.size_s() << "...";
-	PRIVATE->obj_queue.clear();
-	PRIVATE->queue_mutex.unlock();
-	piForeach (PIObject * o, oq)
-		deleteObject(o);
+	PRIVATE->thread.unlock();
+	//piCout << "[Deleter] post" << o << "done";
 }
 
 
@@ -780,9 +749,9 @@ void PIObject::Deleter::deleteObject(PIObject * o) {
 	//piCout << "[Deleter] delete" << (uintptr_t)o << "...";
 	if (o->isPIObject()) {
 		//piCout << "[Deleter] delete" << (uintptr_t)o << "wait atomic ...";
-		while (o->isInEvent()) piMSleep(1);
+		while (o->isInEvent()) piMinSleep();
 		//piCout << "[Deleter] delete" << (uintptr_t)o << "wait atomic done";
-		if (o->isPIObject()) delete o;
+		delete o;
 	}
 	//piCout << "[Deleter] delete" << (uintptr_t)o << "done";
 }

libs/main/core/piobject.h

@@ -503,10 +503,7 @@ private:
 		static Deleter * instance();
 		void post(PIObject * o);
 	private:
-		void proc();
-		void deleteAll();
 		void deleteObject(PIObject * o);
-		std::atomic_bool stopping, started, posted;
 		PRIVATE_DECLARATION(PIP_EXPORT)
 	};
 

libs/main/core/pitime.cpp

@@ -469,13 +469,3 @@ PICout operator <<(PICout s, const PIDateTime & v) {
 	return s;
 }
 
-
-#ifdef WINDOWS
-void msleep(int msecs) {Sleep(msecs);}
-#else
-#  ifdef FREERTOS
-void msleep(int msecs) {vTaskDelay(msecs / portTICK_PERIOD_MS);}
-#  else
-void msleep(int msecs) {usleep(msecs * 1000);}
-#  endif
-#endif

libs/main/core/pitime.h

@@ -29,8 +29,6 @@
 #ifdef QNX
 #  include <time.h>
 #endif
-//! @brief Sleep for "msecs" milliseconds
-PIP_EXPORT void msleep(int msecs);
 
 /*! @brief Precise sleep for "usecs" microseconds
  * \details This function consider \c "usleep" offset
@@ -48,6 +46,8 @@ inline void piMSleep(double msecs) {piUSleep(int(msecs * 1000.));} // on !Window
  * \details This function exec \a piUSleep (msecs * 1000000). */
 inline void piSleep(double secs) {piUSleep(int(secs * 1000000.));} // on !Windows consider constant "usleep" offset
 
+//! Shortest available on current system sleep
+inline void piMinSleep() {piMSleep(PIP_MIN_MSLEEP);}
 
 
 

libs/main/io_devices/piethernet.cpp

@@ -686,7 +686,7 @@ int PIEthernet::readDevice(void * read_to, int max_size) {
 		s = accept(sock, (sockaddr * )&client_addr, &slen);
 		if (s == -1) {
 			//piCoutObj << "Can`t accept new connection, " << ethErrorString();
-			msleep(PIP_MIN_MSLEEP);
+			piMinSleep();
 			return -1;
 		}
 		rs = ethRecv(s, read_to, max_size);
@@ -788,7 +788,7 @@ int PIEthernet::writeDevice(const void * data, int max_size) {
 		//piCoutObj << "connect SingleTCP" << ip_s << ":" << port_s << "...";
 		if (::connect(sock, (sockaddr * )&PRIVATE->addr_, sizeof(PRIVATE->addr_)) != 0) {
 			//piCoutObj << "Can`t connect to " << ip_s << ":" << port_s << ", " << ethErrorString();
-			msleep(PIP_MIN_MSLEEP);
+			piMinSleep();
 			return -1;
 		}
 		//piCoutObj << "ok, write SingleTCP" << int(data) << max_size << "bytes ...";

libs/main/io_devices/piiodevice.cpp

@@ -254,7 +254,7 @@ void PIIODevice::write_func() {
 			int ret = write(item.first);
 			threadedWriteEvent(item.second, ret);
 		}
-		msleep(PIP_MIN_MSLEEP);
+		piMinSleep();
 	}
 }
 
@@ -338,7 +338,7 @@ PIByteArray PIIODevice::readForTime(double timeout_ms) {
 	tm.reset();
 	while (tm.elapsed_m() < timeout_ms) {
 		ret = read(td, threaded_read_buffer_size);
-		if (ret <= 0) msleep(PIP_MIN_MSLEEP);
+		if (ret <= 0) piMinSleep();
 		else str.append(td, ret);
 	}
 	delete[] td;

libs/main/io_devices/piserial.cpp

@@ -434,7 +434,7 @@ bool PISerial::read(void * data, int size, double timeout_ms) {
 		while (all < size && tm_.elapsed_m() < timeout_ms) {
 			ret = readDevice(&((uchar * )data)[all], size - all);
 			if (ret > 0) all += ret;
-			else msleep(PIP_MIN_MSLEEP);
+			else piMinSleep();
 		}
 		setOption(BlockingRead, br);
 		received(data, all);
@@ -473,13 +473,13 @@ PIString PISerial::read(int size, double timeout_ms) {
 		if (size <= 0) {
 			while (tm_.elapsed_m() < timeout_ms) {
 				ret = readDevice(td, 1024);
-				if (ret <= 0) msleep(PIP_MIN_MSLEEP);
+				if (ret <= 0) piMinSleep();
 				else str << PIString((char*)td, ret);
 			}
 		} else {
 			while (all < size && tm_.elapsed_m() < timeout_ms) {
 				ret = readDevice(td, size - all);
-				if (ret <= 0) msleep(PIP_MIN_MSLEEP);
+				if (ret <= 0) piMinSleep();
 				else {
 					str << PIString((char*)td, ret);
 					all += ret;
@@ -493,7 +493,7 @@ PIString PISerial::read(int size, double timeout_ms) {
 		str << PIString((char*)td, all);
 		while (all < size) {
 			ret = readDevice(td, size - all);
-			if (ret <= 0) msleep(PIP_MIN_MSLEEP);
+			if (ret <= 0) piMinSleep();
 			else {
 				str << PIString((char*)td, ret);
 				all += ret;
@@ -525,13 +525,13 @@ PIByteArray PISerial::readData(int size, double timeout_ms) {
 		if (size <= 0) {
 			while (tm_.elapsed_m() < timeout_ms) {
 				ret = readDevice(td, 1024);
-				if (ret <= 0) msleep(PIP_MIN_MSLEEP);
+				if (ret <= 0) piMinSleep();
 				else str.append(td, ret);
 			}
 		} else {
 			while (all < size && tm_.elapsed_m() < timeout_ms) {
 				ret = readDevice(td, size - all);
-				if (ret <= 0) msleep(PIP_MIN_MSLEEP);
+				if (ret <= 0) piMinSleep();
 				else {
 					str.append(td, ret);
 					all += ret;
@@ -545,7 +545,7 @@ PIByteArray PISerial::readData(int size, double timeout_ms) {
 		str.append(td, all);
 		while (all < size) {
 			ret = readDevice(td, size - all);
-			if (ret <= 0) msleep(PIP_MIN_MSLEEP);
+			if (ret <= 0) piMinSleep();
 			else {
 				str.append(td, ret);
 				all += ret;

libs/main/io_utils/pibasetransfer.cpp

@@ -346,7 +346,7 @@ bool PIBaseTransfer::send_process() {
 		if (chk == 0) return finish_send(true);
 		if (chk != prev_chk) rtm.reset();
 		else if (rtm.elapsed_m() < 100) {
-			piMSleep(PIP_MIN_MSLEEP);
+			piMinSleep();
 			continue;
 		}
 		if (is_pause) {
@@ -507,7 +507,7 @@ bool PIBaseTransfer::getStartRequest() {
 			return true;
 		}
 		mutex_session.unlock();
-		piMSleep(PIP_MIN_MSLEEP);
+		piMinSleep();
 	}
 	return false;
 }

libs/main/system/piprocess.cpp

@@ -66,7 +66,7 @@ void PIProcess::exec_() {
 	startOnce();
 	//cout << "exec wait" << endl;
 	while (!is_exec)
-		msleep(PIP_MIN_MSLEEP);
+		piMinSleep();
 	//cout << "exec end" << endl;
 }
 
@@ -172,7 +172,7 @@ void PIProcess::startProc(bool detached) {
 		if (execve(str.data(), a, e) < 0)
 			piCoutObj << "\"execve" << str << args << "\" error :" << errorString();
 	} else {
-		msleep(PIP_MIN_MSLEEP);
+		piMinSleep;
 		//cout << "wait" << endl;
 		if (!detached) {
 			wait(&exit_code);

libs/main/system/pisystemmonitor.cpp

@@ -145,9 +145,9 @@ bool PISystemMonitor::startOnSelf(int interval_ms) {
 
 
 PIVector<PISystemMonitor::ThreadStats> PISystemMonitor::threadsStatistic() const {
-	mutex_.lock();
+	lock();
 	PIVector<PISystemMonitor::ThreadStats> ret = cur_ts;
-	mutex_.unlock();
+	unlock();
 	return ret;
 }
 
@@ -341,9 +341,9 @@ void PISystemMonitor::run() {
 		//piCout << ts_new.cpu_load_user;
 	}
 	last_tm = cur_tm;
-	mutex_.lock();
+	lock();
 	cur_ts = cur_tm.values();
-	mutex_.unlock();
+	unlock();
 	tstat.ram_total = totalRAM();
 	tstat.ram_used = usedRAM();
 	tstat.ram_free = freeRAM();

libs/main/thread/piconditionvar.cpp

@@ -36,7 +36,6 @@ PRIVATE_DEFINITION_START(PIConditionVariable)
 #else
 	pthread_cond_t nativeHandle;
 #endif
-	bool isDestroying;
 PRIVATE_DEFINITION_END(PIConditionVariable)
 
 
@@ -44,7 +43,6 @@ PIConditionVariable::PIConditionVariable() {
 #ifdef WINDOWS
 	InitializeConditionVariable(&PRIVATE->nativeHandle);
 #else
-	PRIVATE->isDestroying = false;
 
 	pthread_condattr_t condattr;
 	pthread_condattr_init(&condattr);
@@ -84,7 +82,6 @@ void PIConditionVariable::wait(PIMutex& lk, const std::function<bool()>& conditi
 #else
 		pthread_cond_wait(&PRIVATE->nativeHandle, (pthread_mutex_t*)lk.handle());
 #endif
-		if (PRIVATE->isDestroying) return;
 	}
 }
 
@@ -100,7 +97,6 @@ bool PIConditionVariable::waitFor(PIMutex &lk, int timeoutMs) {
 	st.toTimespec(&expire_ts);
 	isNotTimeout = pthread_cond_timedwait(&PRIVATE->nativeHandle, (pthread_mutex_t*)lk.handle(), &expire_ts) == 0;
 #endif
-	if (PRIVATE->isDestroying) return false;
 	return isNotTimeout;
 }
 
@@ -127,7 +123,6 @@ bool PIConditionVariable::waitFor(PIMutex& lk, int timeoutMs, const std::functio
 		bool isTimeout = pthread_cond_timedwait(&PRIVATE->nativeHandle, (pthread_mutex_t*)lk.handle(), &expire_ts) != 0;
 #endif
 		if (isTimeout) return false;
-		if (PRIVATE->isDestroying) return false;
 	}
 	return true;
 }

libs/main/thread/pigrabberbase.h

@@ -162,7 +162,7 @@ private:
 				return;
 			}
 			if (ret > 0) {
-				piMSleep(PIP_MIN_MSLEEP);
+				piMinSleep();
 				return;
 			}
 			diag_.received(1);

libs/main/thread/pipipelinethread.h

@@ -25,6 +25,8 @@
 
 #include "pithread.h"
 #include "piqueue.h"
+#include "piconditionvar.h"
+
 
 template <typename Tin, typename Tout>
 class PIPipelineThread : public PIThread
@@ -35,10 +37,10 @@ public:
 		cnt = 0;
 		max_size = 0;
 		wait_next_pipe = false;
-		next_overload = false;
 	}
 	~PIPipelineThread() {
 		stop();
+		cv.notifyAll();
 		if (!waitForFinish(1000)) {
 			piCoutObj << "terminating self thread";
 			terminate();
@@ -46,21 +48,27 @@ public:
 	}
 	template <typename T>
 	void connectTo(PIPipelineThread<Tout, T> * next) {
-		CONNECT2(void, Tout, bool *, this, calculated, next, enqueue)
+		CONNECT3(void, Tout, bool, bool *, this, calculated, next, enqueue)
 	}
-	EVENT2(calculated, const Tout &, v, bool *, overload)
-	void enqueue(const Tin &v) {enqueue(v, 0);}
-	EVENT_HANDLER2(void, enqueue, const Tin &, v, bool *, overload) {
+	EVENT3(calculated, const Tout &, v, bool, wait, bool *, overload)
+	EVENT_HANDLER3(void, enqueue, const Tin &, v, bool, wait, bool *, overload) {
 		mutex.lock();
 		//piCoutObj << "enque" << overload;
+		if (wait && max_size != 0) {
+			mutex_wait.lock();
+			while (in.size() >= max_size) cv_wait.wait(mutex_wait);
+			mutex_wait.unlock();
+		}
 		if (max_size == 0 || in.size() < max_size) {
 			in.enqueue(v);
+			cv.notifyAll();
 			if (overload) *overload = false;
 		} else {
 			if (overload) *overload = true;
 		}
 		mutex.unlock();
 	}
+	void enqueue(const Tin &v, bool wait = false) {enqueue(v, wait, nullptr);}
 	const ullong * counterPtr() const {return &cnt;}
 	ullong counter() const {return cnt;}
 	bool isEmpty() {
@@ -79,15 +87,18 @@ public:
 	}
 	void clear() {
 		mutex.lock();
+		mutex_wait.lock();
 		in.clear();
-		next_overload = false;
+		cv_wait.notifyAll();
+		mutex_wait.unlock();
 		mutex.unlock();
 	}
 	void stopCalc(int wait_delay = 100) {
 		if (isRunning()) {
 			stop();
+			cv.notifyAll();
 			if (!waitForFinish(wait_delay)) {
-				mutex_l.unlock();
+				mutex_last.unlock();
 				mutex.unlock();
 				terminate();
 			}
@@ -95,18 +106,14 @@ public:
 	}
 	Tout getLast() {
 		Tout ret;
-		mutex_l.lock();
+		mutex_last.lock();
 		ret = last;
-		mutex_l.unlock();
+		mutex_last.unlock();
 		return ret;
 	}
 
 	uint maxQueSize() {
-		uint ret;
-		mutex.lock();
-		ret = max_size;
-		mutex.unlock();
-		return ret;
+		return max_size;
 	}
 
 	void setMaxQueSize(uint count) {
@@ -127,39 +134,35 @@ protected:
 private:
 	void begin() {cnt = 0;}
 	void run() {
-		//piCoutObj << "run ...";
 		mutex.lock();
-		if (in.isEmpty()) {
-			mutex.unlock();
-			piMSleep(10);
-			//piCoutObj << "run in empty";
-			return;
-		}
-		if (next_overload && wait_next_pipe) {
-			mutex.unlock();
-			//piCoutObj << "wait" << &next_overload;
-			calculated(last, &next_overload);
-			piMSleep(10);
-		} else {
-			Tin t = in.dequeue();
-			mutex.unlock();
-			bool ok = true;
-			Tout r = calc(t, ok);
-			if (ok) {
-				mutex_l.lock();
-				last = r;
-				mutex_l.unlock();
-				cnt++;
-				//piCoutObj << "calc ok" << &next_overload;
-				calculated(r, &next_overload);
+		while (in.isEmpty()) {
+			cv.wait(mutex);
+			if (terminating) {
+				mutex.unlock();
+				return;
 			}
 		}
+		mutex_wait.lock();
+		Tin t = in.dequeue();
+		mutex.unlock();
+		cv_wait.notifyAll();
+		mutex_wait.unlock();
+		bool ok = true;
+		Tout r = calc(t, ok);
+		if (ok) {
+			mutex_last.lock();
+			last = r;
+			mutex_last.unlock();
+			cnt++;
+			//piCoutObj << "calc ok";
+			calculated(r, wait_next_pipe);
+		}
 		//piCoutObj << "run ok";
 	}
-	PIMutex mutex;
-	PIMutex mutex_l;
+	PIMutex mutex, mutex_wait;
+	PIConditionVariable cv, cv_wait;
+	PIMutex mutex_last;
 	bool wait_next_pipe;
-	bool next_overload;
 	ullong cnt;
 	PIQueue<Tin> in;
 	Tout last;

libs/main/thread/pithread.cpp

@@ -63,7 +63,7 @@ event started();
 while (isRunning()) {
     run();
     ThreadFunc();
-    msleep(timer_delay);
+    piMSleep(timer_delay);
 }
 event stopped();
 end();
@@ -402,7 +402,7 @@ bool PIThread::waitForFinish(int timeout_msecs) {
 	if (!running_) return true;
 	if (timeout_msecs < 0) {
 		while (running_) {
-			msleep(PIP_MIN_MSLEEP);
+			piMinSleep();
 #ifdef WINDOWS
 			if (!isExists(PRIVATE->thread)) {
 				unlock();
@@ -414,7 +414,7 @@ bool PIThread::waitForFinish(int timeout_msecs) {
 	}
 	tmf_.reset();
 	while (running_ && tmf_.elapsed_m() < timeout_msecs) {
-		msleep(PIP_MIN_MSLEEP);
+		piMinSleep();
 #ifdef WINDOWS
 		if (!isExists(PRIVATE->thread)) {
 			unlock();
@@ -430,12 +430,12 @@ bool PIThread::waitForStart(int timeout_msecs) {
 	if (running_) return true;
 	if (timeout_msecs < 0) {
 		while (!running_)
-			msleep(PIP_MIN_MSLEEP);
+			piMinSleep();
 		return true;
 	}
 	tms_.reset();
 	while (!running_ && tms_.elapsed_m() < timeout_msecs)
-		msleep(PIP_MIN_MSLEEP);
+		piMinSleep();
 	return tms_.elapsed_m() < timeout_msecs;
 }
 
@@ -456,9 +456,9 @@ void PIThread::_beginThread() {
 	PIINTROSPECTION_THREAD_START(this);
 	REGISTER_THREAD(this);
 	running_ = true;
-	if (lockRun) mutex_.lock();
+	if (lockRun) thread_mutex.lock();
 	begin();
-	if (lockRun) mutex_.unlock();
+	if (lockRun) thread_mutex.unlock();
 	started();
 }
 
@@ -466,7 +466,7 @@ void PIThread::_beginThread() {
 void PIThread::_runThread() {
 	PIINTROSPECTION_THREAD_RUN(this);
 	//PICout(PICoutManipulators::DefaultControls) << "thread" << this << "lock" << "...";
-	if (lockRun) mutex_.lock();
+	if (lockRun) thread_mutex.lock();
 	//PICout(PICoutManipulators::DefaultControls) << "thread" << this << "lock" << "ok";
 	//PICout(PICoutManipulators::DefaultControls) << "thread" << this << "run" << "...";
 #ifdef PIP_INTROSPECTION
@@ -482,7 +482,7 @@ void PIThread::_runThread() {
 	if (ret_func != 0) ret_func(data_);
 	//PICout(PICoutManipulators::DefaultControls) << "thread" << this << "ret_func" << "ok";
 	//PICout(PICoutManipulators::DefaultControls) << "thread" << this << "unlock" << "...";
-	if (lockRun) mutex_.unlock();
+	if (lockRun) thread_mutex.unlock();
 	//PICout(PICoutManipulators::DefaultControls) << "thread" << this << "unlock" << "ok";
 }
 
@@ -491,11 +491,11 @@ void PIThread::_endThread() {
 	//PICout(PICoutManipulators::DefaultControls) << "thread" << this << "stop" << "...";
 	stopped();
 	//PICout(PICoutManipulators::DefaultControls) << "thread" << this << "stop" << "ok";
-	if (lockRun) mutex_.lock();
+	if (lockRun) thread_mutex.lock();
 	//PICout(PICoutManipulators::DefaultControls) << "thread" << this << "end" << "...";
 	end();
 	//PICout(PICoutManipulators::DefaultControls) << "thread" << this << "stop" << "ok";
-	if (lockRun) mutex_.unlock();
+	if (lockRun) thread_mutex.unlock();
 	terminating = running_ = false;
 	tid_ = -1;
 	//PICout(PICoutManipulators::DefaultControls) << "thread" << this << "exit";

libs/main/thread/pithread.h

@@ -131,11 +131,15 @@ public:
 
 	//! @brief Set necessity of lock every \a run with internal mutex
 	void needLockRun(bool need) {lockRun = need;}
-	EVENT_HANDLER0(void, lock) {mutex_.lock();}
-	EVENT_HANDLER0(void, unlock) {mutex_.unlock();}
+
+	//! @brief Lock internal mutex
+	EVENT_HANDLER0(void, lock) const {thread_mutex.lock();}
+
+	//! @brief Unlock internal mutex
+	EVENT_HANDLER0(void, unlock) const {thread_mutex.unlock();}
 
 	//! @brief Returns internal mutex
-	PIMutex & mutex() {return mutex_;}
+	PIMutex & mutex() const {return thread_mutex;}
 
 	//! @brief Returns thread ID
 	llong tid() const {return tid_;}
@@ -239,7 +243,7 @@ protected:
 	int delay_, policy_;
 	llong tid_;
 	void * data_;
-	mutable PIMutex mutex_;
+	mutable PIMutex thread_mutex;
 	PITimeMeasurer tmf_, tms_, tmr_;
 	PIThread::Priority priority_;
 	ThreadFunc ret_func;

libs/main/thread/pithreadmodule.h

@@ -29,5 +29,6 @@
 #include "piconditionvar.h"
 #include "pithreadpoolexecutor.h"
 #include "pithreadpoolloop.h"
+#include "pithreadnotifier.h"
 
 #endif // PITHREADMODULE_H

libs/main/thread/pithreadnotifier.cpp

@@ -0,0 +1,39 @@
+/*
+	PIP - Platform Independent Primitives
+	Class for simply notify and wait in different threads
+	Andrey Bychkov work.a.b@yandex.ru
+
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU Lesser General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU Lesser General Public License for more details.
+
+	You should have received a copy of the GNU Lesser General Public License
+	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "pithreadnotifier.h"
+
+
+PIThreadNotifier::PIThreadNotifier() : cnt(0) {}
+
+
+void PIThreadNotifier::wait() {
+	m.lock();
+	while (cnt == 0) v.wait(m);
+	cnt--;
+	m.unlock();
+}
+
+
+void PIThreadNotifier::notifyOnce() {
+	m.lock();
+	cnt++;
+	v.notifyAll();
+	m.unlock();
+}

libs/main/thread/pithreadnotifier.h

@@ -0,0 +1,52 @@
+/*! @file pithreadnotifier.h
+ * @brief Class for simply notify and wait in different threads
+*/
+/*
+	PIP - Platform Independent Primitives
+	Class for simply notify and wait in different threads
+	Andrey Bychkov work.a.b@yandex.ru
+
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU Lesser General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU Lesser General Public License for more details.
+
+	You should have received a copy of the GNU Lesser General Public License
+	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef PITHREADNOTIFIER_H
+#define PITHREADNOTIFIER_H
+
+#include "piconditionvar.h"
+
+
+class PIP_EXPORT PIThreadNotifier {
+public:
+	PIThreadNotifier();
+
+	//! Start waiting, return if other thread call \a notifyOnce().
+	//! If \a notifyOnce() has been called before, then returns immediately.
+	//! If notifyOnce() has been called "n" times, then returns immediately "n" times,
+	//! but only if wait in one thread.
+	//! If many threads waiting, then If notifyOnce() has been called "n" times,
+	//! All threads total returns "n" times in random sequence.
+	void wait();
+
+	//! Notify one waiting thread, wich waiting on \a wait() function.
+	//! If many threads waiting, then notify randomly one.
+	//! If call this "n" times, then notify any waiting threads totally "n" times.
+	void notifyOnce();
+
+private:
+	ullong cnt;
+	PIMutex m;
+	PIConditionVariable v;
+};
+
+#endif // PITHREADNOTIFIER_H

libs/main/thread/pitimer.cpp

@@ -648,11 +648,11 @@ bool PITimer::stop(bool wait) {
 bool PITimer::waitForFinish(int timeout_msecs) {
 	if (timeout_msecs < 0) {
 		while (isRunning())
-			msleep(PIP_MIN_MSLEEP);
+			piMinSleep();
 		return true;
 	}
 	PITimeMeasurer tm;
 	while (isRunning() && tm.elapsed_m() < timeout_msecs)
-		msleep(PIP_MIN_MSLEEP);
+		piMinSleep();
 	return tm.elapsed_m() < timeout_msecs;
 }