Minor cleanup

rpcs3/Emu/Cell/RawSPUThread.h

@@ -1,6 +1,14 @@
 #pragma once
 #include "SPUThread.h"
 
+enum : u32
+{
+	RAW_SPU_OFFSET = 0x00100000,
+	RAW_SPU_BASE_ADDR = 0xE0000000,
+	RAW_SPU_LS_OFFSET = 0x00000000,
+	RAW_SPU_PROB_OFFSET = 0x00040000,
+};
+
 __forceinline static u32 GetRawSPURegAddrByNum(int num, int offset)
 {
 	return RAW_SPU_OFFSET * num + RAW_SPU_BASE_ADDR + RAW_SPU_PROB_OFFSET + offset;

rpcs3/Emu/Cell/SPUThread.cpp

@@ -604,19 +604,17 @@ void SPUThread::set_ch_value(u32 ch, u32 value)
 				if (!queue)
 				{
 					LOG_WARNING(SPU, "sys_spu_thread_send_event(spup=%d, data0=0x%x, data1=0x%x): event queue not connected", spup, (value & 0x00ffffff), data);
-					ch_in_mbox.push_uncond(CELL_ENOTCONN); // TODO: check error passing
-					return;
+					return ch_in_mbox.push_uncond(CELL_ENOTCONN); // TODO: check error passing
 				}
 
 				if (queue->events.size() >= queue->size)
 				{
-					ch_in_mbox.push_uncond(CELL_EBUSY);
-					return;
+					return ch_in_mbox.push_uncond(CELL_EBUSY);
 				}
 
 				queue->push(SYS_SPU_THREAD_EVENT_USER_KEY, GetId(), ((u64)spup << 32) | (value & 0x00ffffff), data);
-				ch_in_mbox.push_uncond(CELL_OK);
-				return;
+
+				return ch_in_mbox.push_uncond(CELL_OK);
 			}
 			else if (code < 128)
 			{
@@ -685,20 +683,22 @@ void SPUThread::set_ch_value(u32 ch, u32 value)
 
 				if (!Emu.GetIdManager().GetIDData(data, ef))
 				{
-					ch_in_mbox.push_uncond(CELL_ESRCH);
-					return;
+					return ch_in_mbox.push_uncond(CELL_ESRCH);
 				}
 
-				while (ef->waiters < 0)
+				while (ef->cancelled)
 				{
 					ef->cv.wait_for(lv2_lock, std::chrono::milliseconds(1));
 				}
 
 				ef->flags |= 1ull << flag;
-				ef->cv.notify_all();
 
-				ch_in_mbox.push_uncond(CELL_OK);
-				return;
+				if (ef->waiters)
+				{
+					ef->cv.notify_all();
+				}
+				
+				return ch_in_mbox.push_uncond(CELL_OK);
 			}
 			else if (code == 192)
 			{
@@ -732,13 +732,18 @@ void SPUThread::set_ch_value(u32 ch, u32 value)
 					return;
 				}
 
-				while (ef->waiters < 0)
+				while (ef->cancelled)
 				{
 					ef->cv.wait_for(lv2_lock, std::chrono::milliseconds(1));
 				}
 
 				ef->flags |= 1ull << flag;
-				ef->cv.notify_all();
+
+				if (ef->waiters)
+				{
+					ef->cv.notify_all();
+				}
+				
 				return;
 			}
 			else
@@ -958,8 +963,7 @@ void SPUThread::stop_and_signal(u32 code)
 		if (ch_in_mbox.get_count())
 		{
 			LOG_ERROR(SPU, "sys_spu_thread_receive_event(spuq=0x%x): In_MBox is not empty", spuq);
-			ch_in_mbox.push_uncond(CELL_EBUSY);
-			return;
+			return ch_in_mbox.push_uncond(CELL_EBUSY);
 		}
 
 		if (Ini.HLELogging.GetValue())
@@ -986,20 +990,17 @@ void SPUThread::stop_and_signal(u32 code)
 
 		if (!queue)
 		{
-			ch_in_mbox.push_uncond(CELL_EINVAL); // TODO: check error value
-			return;
+			return ch_in_mbox.push_uncond(CELL_EINVAL); // TODO: check error value
 		}
 
 		// protocol is ignored in current implementation
-		queue->waiters++; assert(queue->waiters > 0);
+		queue->waiters++;
 
 		while (queue->events.empty())
 		{
-			if (queue->waiters < 0)
+			if (queue->cancelled)
 			{
-				queue->waiters--; assert(queue->waiters < 0);
-				ch_in_mbox.push_uncond(CELL_ECANCELED);
-				return;
+				return ch_in_mbox.push_uncond(CELL_ECANCELED);
 			}
 
 			if (Emu.IsStopped())
@@ -1018,7 +1019,7 @@ void SPUThread::stop_and_signal(u32 code)
 		ch_in_mbox.push_uncond((u32)event.data3);
 		
 		queue->events.pop_front();
-		queue->waiters--; assert(queue->waiters >= 0);
+		queue->waiters--;
 
 		if (queue->events.size())
 		{

rpcs3/Emu/Memory/Memory.h

@@ -14,14 +14,6 @@ enum MemoryType
 	Memory_PSP,
 };
 
-enum : u32
-{
-	RAW_SPU_OFFSET = 0x00100000,
-	RAW_SPU_BASE_ADDR = 0xE0000000,
-	RAW_SPU_LS_OFFSET = 0x00000000,
-	RAW_SPU_PROB_OFFSET = 0x00040000,
-};
-
 class MemoryBase
 {
 	std::vector<MemoryBlock*> MemoryBlocks;
@@ -98,4 +90,3 @@ public:
 extern MemoryBase Memory;
 
 #include "vm.h"
-

rpcs3/Emu/SysCalls/lv2/sys_cond.cpp

@@ -170,11 +170,15 @@ s32 sys_cond_wait(PPUThread& CPU, u32 cond_id, u64 timeout)
 	}
 
 	// protocol is ignored in current implementation
-	cond->waiters++; assert(cond->waiters > 0);
+	cond->waiters++;
 
 	// unlock mutex
 	cond->mutex->owner.reset();
-	cond->mutex->cv.notify_one();
+
+	if (cond->mutex->waiters)
+	{
+		cond->mutex->cv.notify_one();
+	}
 
 	// save recursive value
 	const u32 recursive_value = cond->mutex->recursive_count.exchange(0);
@@ -189,7 +193,7 @@ s32 sys_cond_wait(PPUThread& CPU, u32 cond_id, u64 timeout)
 			// cancel waiting if the mutex is free, restore its owner and recursive value
 			cond->mutex->owner = thread;
 			cond->mutex->recursive_count = recursive_value;
-			cond->waiters--; assert(cond->waiters >= 0);
+			cond->waiters--;
 
 			return CELL_ETIMEDOUT;
 		}

rpcs3/Emu/SysCalls/lv2/sys_cond.h

@@ -24,7 +24,7 @@ struct cond_t
 
 	// TODO: use sleep queue, possibly remove condition variable
 	std::condition_variable cv;
-	std::atomic<s32> waiters;
+	std::atomic<u32> waiters;
 
 	cond_t(std::shared_ptr<mutex_t>& mutex, u64 name)
 		: mutex(mutex)

rpcs3/Emu/SysCalls/lv2/sys_event.cpp

@@ -49,18 +49,11 @@ s32 sys_event_queue_create(vm::ptr<u32> equeue_id, vm::ptr<sys_event_queue_attr>
 	default: sys_event.Error("sys_event_queue_create(): unknown type (0x%x)", type); return CELL_EINVAL;
 	}
 
-	LV2_LOCK;
-
-	if (Emu.GetEventManager().CheckKey(event_queue_key))
-	{
-		return CELL_EEXIST;
-	}
-
 	std::shared_ptr<event_queue_t> queue(new event_queue_t(protocol, type, attr->name_u64, event_queue_key, size));
 
 	if (!Emu.GetEventManager().RegisterKey(queue, event_queue_key))
 	{
-		return CELL_EAGAIN;
+		return CELL_EEXIST;
 	}
 
 	*equeue_id = Emu.GetIdManager().GetNewID(queue, TYPE_EVENT_QUEUE);
@@ -86,16 +79,18 @@ s32 sys_event_queue_destroy(u32 equeue_id, s32 mode)
 		return CELL_EINVAL;
 	}
 
-	assert(queue->waiters >= 0);
-
 	if (!mode && queue->waiters)
 	{
 		return CELL_EBUSY;
 	}
-	else
+
+	if (queue->cancelled.exchange(true))
+	{
+		throw __FUNCTION__;
+	}
+
+	if (queue->waiters)
 	{
-		// set special value for waiters
-		queue->waiters.exchange(-1);
 		queue->cv.notify_all();
 	}
 
@@ -107,7 +102,7 @@ s32 sys_event_queue_destroy(u32 equeue_id, s32 mode)
 
 s32 sys_event_queue_tryreceive(u32 equeue_id, vm::ptr<sys_event_t> event_array, s32 size, vm::ptr<u32> number)
 {
-	sys_event.Warning("sys_event_queue_tryreceive(equeue_id=%d, event_array=*0x%x, size=%d, number=*0x%x)", equeue_id, event_array, size, number);
+	sys_event.Log("sys_event_queue_tryreceive(equeue_id=%d, event_array=*0x%x, size=%d, number=*0x%x)", equeue_id, event_array, size, number);
 
 	LV2_LOCK;
 
@@ -130,7 +125,7 @@ s32 sys_event_queue_tryreceive(u32 equeue_id, vm::ptr<sys_event_t> event_array,
 
 	s32 count = 0;
 
-	while (count < size && queue->events.size())
+	while (!queue->waiters && count < size && queue->events.size())
 	{
 		auto& event = queue->events.front();
 		event_array[count++] = { be_t<u64>::make(event.source), be_t<u64>::make(event.data1), be_t<u64>::make(event.data2), be_t<u64>::make(event.data3) };
@@ -140,11 +135,6 @@ s32 sys_event_queue_tryreceive(u32 equeue_id, vm::ptr<sys_event_t> event_array,
 
 	*number = count;
 
-	if (queue->events.size())
-	{
-		queue->cv.notify_one();
-	}
-
 	return CELL_OK;
 }
 
@@ -169,19 +159,19 @@ s32 sys_event_queue_receive(PPUThread& CPU, u32 equeue_id, vm::ptr<sys_event_t>
 	}
 
 	// protocol is ignored in current implementation
-	queue->waiters++; assert(queue->waiters > 0);
+	queue->waiters++;
 
 	while (queue->events.empty())
 	{
-		if (queue->waiters < 0)
+		if (queue->cancelled)
 		{
-			queue->waiters--; assert(queue->waiters < 0);
+			queue->waiters--;
 			return CELL_ECANCELED;
 		}
 
 		if (timeout && get_system_time() - start_time > timeout)
 		{
-			queue->waiters--; assert(queue->waiters >= 0);
+			queue->waiters--;
 			return CELL_ETIMEDOUT;
 		}
 
@@ -202,12 +192,7 @@ s32 sys_event_queue_receive(PPUThread& CPU, u32 equeue_id, vm::ptr<sys_event_t>
 	CPU.GPR[7] = event.data3;
 
 	queue->events.pop_front();
-	queue->waiters--; assert(queue->waiters >= 0);
-
-	if (queue->events.size())
-	{
-		queue->cv.notify_one();
-	}
+	queue->waiters--;
 
 	return CELL_OK;
 }
@@ -247,8 +232,6 @@ s32 sys_event_port_create(vm::ptr<u32> eport_id, s32 port_type, u64 name)
 		return CELL_EINVAL;
 	}
 
-	LV2_LOCK;
-
 	std::shared_ptr<event_port_t> eport(new event_port_t(port_type, name));
 
 	*eport_id = Emu.GetIdManager().GetNewID(eport, TYPE_EVENT_PORT);

rpcs3/Emu/SysCalls/lv2/sys_event.h

@@ -78,10 +78,11 @@ struct event_queue_t
 	const s32 size;
 
 	std::deque<event_t> events;
+	std::atomic<bool> cancelled;
 
 	// TODO: use sleep queue, possibly remove condition variable
 	std::condition_variable cv;
-	std::atomic<s32> waiters;
+	std::atomic<u32> waiters;
 
 	event_queue_t(u32 protocol, s32 type, u64 name, u64 key, s32 size)
 		: protocol(protocol)
@@ -89,6 +90,7 @@ struct event_queue_t
 		, name(name)
 		, key(key)
 		, size(size)
+		, cancelled(false)
 		, waiters(0)
 	{
 	}
@@ -96,7 +98,11 @@ struct event_queue_t
 	void push(u64 source, u64 data1, u64 data2, u64 data3)
 	{
 		events.emplace_back(source, data1, data2, data3);
-		cv.notify_one();
+
+		if (waiters)
+		{
+			cv.notify_one();
+		}
 	}
 };
 

rpcs3/Emu/SysCalls/lv2/sys_event_flag.cpp

@@ -16,8 +16,6 @@ s32 sys_event_flag_create(vm::ptr<u32> id, vm::ptr<sys_event_flag_attr> attr, u6
 {
 	sys_event_flag.Warning("sys_event_flag_create(id=*0x%x, attr=*0x%x, init=0x%llx)", id, attr, init);
 
-	LV2_LOCK;
-
 	if (!id || !attr)
 	{
 		return CELL_EFAULT;
@@ -69,11 +67,6 @@ s32 sys_event_flag_destroy(u32 id)
 		return CELL_ESRCH;
 	}
 
-	while (ef->waiters < 0)
-	{
-		ef->cv.wait_for(lv2_lock, std::chrono::milliseconds(1));
-	}
-
 	if (ef->waiters)
 	{
 		return CELL_EBUSY;
@@ -124,7 +117,7 @@ s32 sys_event_flag_wait(u32 id, u64 bitptn, u32 mode, vm::ptr<u64> result, u64 t
 		return CELL_EPERM;
 	}
 
-	while (ef->waiters < 0)
+	while (ef->cancelled)
 	{
 		// wait until other threads return CELL_ECANCELED (to prevent modifying bit pattern)
 		ef->cv.wait_for(lv2_lock, std::chrono::milliseconds(1));
@@ -150,11 +143,9 @@ s32 sys_event_flag_wait(u32 id, u64 bitptn, u32 mode, vm::ptr<u64> result, u64 t
 			break;
 		}
 
-		if (ef->waiters <= 0)
+		if (ef->cancelled)
 		{
-			ef->waiters++; assert(ef->waiters <= 0);
-
-			if (!ef->waiters)
+			if (!--ef->cancelled)
 			{
 				ef->cv.notify_all();
 			}
@@ -164,7 +155,7 @@ s32 sys_event_flag_wait(u32 id, u64 bitptn, u32 mode, vm::ptr<u64> result, u64 t
 
 		if (timeout && get_system_time() - start_time > timeout)
 		{
-			ef->waiters--; assert(ef->waiters >= 0);
+			ef->waiters--;
 			return CELL_ETIMEDOUT;
 		}
 
@@ -187,9 +178,7 @@ s32 sys_event_flag_wait(u32 id, u64 bitptn, u32 mode, vm::ptr<u64> result, u64 t
 		ef->flags = 0;
 	}
 
-	ef->waiters--; assert(ef->waiters >= 0);
-
-	if (ef->flags)
+	if (--ef->waiters && ef->flags)
 	{
 		ef->cv.notify_one();
 	}
@@ -235,7 +224,7 @@ s32 sys_event_flag_trywait(u32 id, u64 bitptn, u32 mode, vm::ptr<u64> result)
 		return CELL_EBUSY;
 	}
 
-	while (ef->waiters < 0)
+	while (ef->cancelled)
 	{
 		ef->cv.wait_for(lv2_lock, std::chrono::milliseconds(1));
 	}
@@ -270,13 +259,17 @@ s32 sys_event_flag_set(u32 id, u64 bitptn)
 		return CELL_ESRCH;
 	}
 
-	while (ef->waiters < 0)
+	while (ef->cancelled)
 	{
 		ef->cv.wait_for(lv2_lock, std::chrono::milliseconds(1));
 	}
 
 	ef->flags |= bitptn;
-	ef->cv.notify_all();
+
+	if (ef->waiters)
+	{
+		ef->cv.notify_all();
+	}
 	
 	return CELL_OK;
 }
@@ -294,7 +287,7 @@ s32 sys_event_flag_clear(u32 id, u64 bitptn)
 		return CELL_ESRCH;
 	}
 
-	while (ef->waiters < 0)
+	while (ef->cancelled)
 	{
 		ef->cv.wait_for(lv2_lock, std::chrono::milliseconds(1));
 	}
@@ -322,7 +315,7 @@ s32 sys_event_flag_cancel(u32 id, vm::ptr<u32> num)
 		return CELL_ESRCH;
 	}
 
-	while (ef->waiters < 0)
+	while (ef->cancelled)
 	{
 		ef->cv.wait_for(lv2_lock, std::chrono::milliseconds(1));
 	}
@@ -332,10 +325,11 @@ s32 sys_event_flag_cancel(u32 id, vm::ptr<u32> num)
 		*num = ef->waiters;
 	}
 
-	// negate value to signal waiting threads and prevent modifying bit pattern
-	ef->waiters = -ef->waiters;
-	ef->cv.notify_all();
-
+	if ((ef->cancelled = ef->waiters.exchange(0)))
+	{
+		ef->cv.notify_all();
+	}
+	
 	return CELL_OK;
 }
 

rpcs3/Emu/SysCalls/lv2/sys_event_flag.h

@@ -34,10 +34,11 @@ struct event_flag_t
 	const u64 name;
 
 	std::atomic<u64> flags;
+	std::atomic<u32> cancelled;
 
 	// TODO: use sleep queue, possibly remove condition variable
 	std::condition_variable cv;
-	std::atomic<s32> waiters;
+	std::atomic<u32> waiters;
 
 	event_flag_t(u64 pattern, u32 protocol, s32 type, u64 name)
 		: flags(pattern)

rpcs3/Emu/SysCalls/lv2/sys_lwcond.cpp

@@ -38,6 +38,7 @@ s32 _sys_lwcond_destroy(u32 lwcond_id)
 	LV2_LOCK;
 
 	std::shared_ptr<lwcond_t> cond;
+
 	if (!Emu.GetIdManager().GetIDData(lwcond_id, cond))
 	{
 		return CELL_ESRCH;
@@ -60,12 +61,13 @@ s32 _sys_lwcond_signal(u32 lwcond_id, u32 lwmutex_id, u32 ppu_thread_id, u32 mod
 	LV2_LOCK;
 
 	std::shared_ptr<lwcond_t> cond;
+	std::shared_ptr<lwmutex_t> mutex;
+
 	if (!Emu.GetIdManager().GetIDData(lwcond_id, cond))
 	{
 		return CELL_ESRCH;
 	}
 
-	std::shared_ptr<lwmutex_t> mutex;
 	if (lwmutex_id && !Emu.GetIdManager().GetIDData(lwmutex_id, mutex))
 	{
 		return CELL_ESRCH;
@@ -117,8 +119,10 @@ s32 _sys_lwcond_signal(u32 lwcond_id, u32 lwmutex_id, u32 ppu_thread_id, u32 mod
 		cond->signaled1++;
 	}
 
-	cond->waiters--;
-	cond->cv.notify_one();
+	if (--cond->waiters)
+	{
+		cond->cv.notify_one();
+	}
 
 	return CELL_OK;
 }
@@ -130,12 +134,13 @@ s32 _sys_lwcond_signal_all(u32 lwcond_id, u32 lwmutex_id, u32 mode)
 	LV2_LOCK;
 
 	std::shared_ptr<lwcond_t> cond;
+	std::shared_ptr<lwmutex_t> mutex;
+
 	if (!Emu.GetIdManager().GetIDData(lwcond_id, cond))
 	{
 		return CELL_ESRCH;
 	}
 
-	std::shared_ptr<lwmutex_t> mutex;
 	if (lwmutex_id && !Emu.GetIdManager().GetIDData(lwmutex_id, mutex))
 	{
 		return CELL_ESRCH;
@@ -147,7 +152,11 @@ s32 _sys_lwcond_signal_all(u32 lwcond_id, u32 lwmutex_id, u32 mode)
 	}
 
 	const s32 count = cond->waiters.exchange(0);
-	cond->cv.notify_all();
+
+	if (count)
+	{
+		cond->cv.notify_all();
+	}
 
 	if (mode == 1)
 	{
@@ -176,12 +185,13 @@ s32 _sys_lwcond_queue_wait(u32 lwcond_id, u32 lwmutex_id, u64 timeout)
 	LV2_LOCK;
 
 	std::shared_ptr<lwcond_t> cond;
+	std::shared_ptr<lwmutex_t> mutex;
+
 	if (!Emu.GetIdManager().GetIDData(lwcond_id, cond))
 	{
 		return CELL_ESRCH;
 	}
 
-	std::shared_ptr<lwmutex_t> mutex;
 	if (!Emu.GetIdManager().GetIDData(lwmutex_id, mutex))
 	{
 		return CELL_ESRCH;
@@ -189,10 +199,14 @@ s32 _sys_lwcond_queue_wait(u32 lwcond_id, u32 lwmutex_id, u64 timeout)
 
 	// finalize unlocking the mutex
 	mutex->signaled++;
-	mutex->cv.notify_one();
+
+	if (mutex->waiters)
+	{
+		mutex->cv.notify_one();
+	}
 
 	// protocol is ignored in current implementation
-	cond->waiters++; assert(cond->waiters > 0);
+	cond->waiters++;
 
 	while (!(cond->signaled1 && mutex->signaled) && !cond->signaled2)
 	{
@@ -202,7 +216,7 @@ s32 _sys_lwcond_queue_wait(u32 lwcond_id, u32 lwmutex_id, u64 timeout)
 		if (is_timedout && !cond->signaled1)
 		{
 			// cancel waiting
-			cond->waiters--; assert(cond->waiters >= 0);
+			cond->waiters--;
 
 			if (mutex->signaled)
 			{

rpcs3/Emu/SysCalls/lv2/sys_lwcond.h

@@ -26,7 +26,7 @@ struct lwcond_t
 
 	// TODO: use sleep queue
 	std::condition_variable cv;
-	std::atomic<s32> waiters;
+	std::atomic<u32> waiters;
 
 	lwcond_t(u64 name)
 		: name(name)

rpcs3/Emu/SysCalls/lv2/sys_lwmutex.cpp

@@ -53,6 +53,7 @@ s32 _sys_lwmutex_destroy(u32 lwmutex_id)
 	LV2_LOCK;
 
 	std::shared_ptr<lwmutex_t> mutex;
+
 	if (!Emu.GetIdManager().GetIDData(lwmutex_id, mutex))
 	{
 		return CELL_ESRCH;
@@ -77,19 +78,20 @@ s32 _sys_lwmutex_lock(u32 lwmutex_id, u64 timeout)
 	LV2_LOCK;
 
 	std::shared_ptr<lwmutex_t> mutex;
+
 	if (!Emu.GetIdManager().GetIDData(lwmutex_id, mutex))
 	{
 		return CELL_ESRCH;
 	}
 
 	// protocol is ignored in current implementation
-	mutex->waiters++; assert(mutex->waiters > 0);
+	mutex->waiters++;
 
 	while (!mutex->signaled)
 	{
 		if (timeout && get_system_time() - start_time > timeout)
 		{
-			mutex->waiters--; assert(mutex->waiters >= 0);
+			mutex->waiters--;
 			return CELL_ETIMEDOUT;
 		}
 
@@ -104,7 +106,7 @@ s32 _sys_lwmutex_lock(u32 lwmutex_id, u64 timeout)
 	
 	mutex->signaled--;
 
-	mutex->waiters--; assert(mutex->waiters >= 0);
+	mutex->waiters--;
 
 	return CELL_OK;
 }
@@ -116,6 +118,7 @@ s32 _sys_lwmutex_trylock(u32 lwmutex_id)
 	LV2_LOCK;
 
 	std::shared_ptr<lwmutex_t> mutex;
+
 	if (!Emu.GetIdManager().GetIDData(lwmutex_id, mutex))
 	{
 		return CELL_ESRCH;
@@ -138,6 +141,7 @@ s32 _sys_lwmutex_unlock(u32 lwmutex_id)
 	LV2_LOCK;
 
 	std::shared_ptr<lwmutex_t> mutex;
+
 	if (!Emu.GetIdManager().GetIDData(lwmutex_id, mutex))
 	{
 		return CELL_ESRCH;
@@ -149,7 +153,11 @@ s32 _sys_lwmutex_unlock(u32 lwmutex_id)
 	}
 
 	mutex->signaled++;
-	mutex->cv.notify_one();
+
+	if (mutex->waiters)
+	{
+		mutex->cv.notify_one();
+	}
 
 	return CELL_OK;
 }

rpcs3/Emu/SysCalls/lv2/sys_lwmutex.h

@@ -76,7 +76,7 @@ struct lwmutex_t
 
 	// TODO: use sleep queue, possibly remove condition variable
 	std::condition_variable cv;
-	std::atomic<s32> waiters;
+	std::atomic<u32> waiters;
 
 	lwmutex_t(u32 protocol, u64 name)
 		: protocol(protocol)

rpcs3/Emu/SysCalls/lv2/sys_mutex.cpp

@@ -16,8 +16,6 @@ s32 sys_mutex_create(vm::ptr<u32> mutex_id, vm::ptr<sys_mutex_attribute_t> attr)
 {
 	sys_mutex.Warning("sys_mutex_create(mutex_id=*0x%x, attr=*0x%x)", mutex_id, attr);
 
-	LV2_LOCK;
-
 	if (!mutex_id || !attr)
 	{
 		return CELL_EFAULT;
@@ -119,13 +117,13 @@ s32 sys_mutex_lock(PPUThread& CPU, u32 mutex_id, u64 timeout)
 	}
 
 	// protocol is ignored in current implementation
-	mutex->waiters++; assert(mutex->waiters > 0);
+	mutex->waiters++;
 
 	while (!mutex->owner.expired())
 	{
 		if (timeout && get_system_time() - start_time > timeout)
 		{
-			mutex->waiters--; assert(mutex->waiters >= 0);
+			mutex->waiters--;
 			return CELL_ETIMEDOUT;
 		}
 
@@ -139,7 +137,7 @@ s32 sys_mutex_lock(PPUThread& CPU, u32 mutex_id, u64 timeout)
 	}
 
 	mutex->owner = thread;
-	mutex->waiters--; assert(mutex->waiters >= 0);
+	mutex->waiters--;
 
 	return CELL_OK;
 }
@@ -218,7 +216,11 @@ s32 sys_mutex_unlock(PPUThread& CPU, u32 mutex_id)
 	else
 	{
 		mutex->owner.reset();
-		mutex->cv.notify_one();
+
+		if (mutex->waiters)
+		{
+			mutex->cv.notify_one();
+		}
 	}
 
 	return CELL_OK;

rpcs3/Emu/SysCalls/lv2/sys_mutex.h

@@ -29,7 +29,7 @@ struct mutex_t
 
 	// TODO: use sleep queue, possibly remove condition variable
 	std::condition_variable cv;
-	std::atomic<s32> waiters;
+	std::atomic<u32> waiters;
 
 	mutex_t(bool recursive, u32 protocol, u64 name)
 		: recursive(recursive)

rpcs3/Emu/SysCalls/lv2/sys_rwlock.cpp

@@ -50,12 +50,13 @@ s32 sys_rwlock_destroy(u32 rw_lock_id)
 	LV2_LOCK;
 
 	std::shared_ptr<rwlock_t> rwlock;
+
 	if (!Emu.GetIdManager().GetIDData(rw_lock_id, rwlock))
 	{
 		return CELL_ESRCH;
 	}
 
-	if (rwlock.use_count() > 2 || rwlock->readers || rwlock->writer || rwlock->waiters)
+	if (rwlock->readers || rwlock->writer || rwlock->rwaiters || rwlock->wwaiters)
 	{
 		return CELL_EBUSY;
 	}
@@ -74,15 +75,20 @@ s32 sys_rwlock_rlock(u32 rw_lock_id, u64 timeout)
 	LV2_LOCK;
 
 	std::shared_ptr<rwlock_t> rwlock;
+
 	if (!Emu.GetIdManager().GetIDData(rw_lock_id, rwlock))
 	{
 		return CELL_ESRCH;
 	}
 
-	while (rwlock->writer || rwlock->waiters)
+	// waiting threads are not properly registered in current implementation
+	rwlock->rwaiters++;
+
+	while (rwlock->writer || rwlock->wwaiters)
 	{
 		if (timeout && get_system_time() - start_time > timeout)
 		{
+			rwlock->rwaiters--;
 			return CELL_ETIMEDOUT;
 		}
 
@@ -92,10 +98,11 @@ s32 sys_rwlock_rlock(u32 rw_lock_id, u64 timeout)
 			return CELL_OK;
 		}
 
-		rwlock->cv.wait_for(lv2_lock, std::chrono::milliseconds(1));
+		rwlock->rcv.wait_for(lv2_lock, std::chrono::milliseconds(1));
 	}
 
 	rwlock->readers++;
+	rwlock->rwaiters--;
 
 	return CELL_OK;
 }
@@ -107,12 +114,13 @@ s32 sys_rwlock_tryrlock(u32 rw_lock_id)
 	LV2_LOCK;
 
 	std::shared_ptr<rwlock_t> rwlock;
+
 	if (!Emu.GetIdManager().GetIDData(rw_lock_id, rwlock))
 	{
 		return CELL_ESRCH;
 	}
 
-	if (rwlock->writer || rwlock->waiters)
+	if (rwlock->writer || rwlock->wwaiters)
 	{
 		return CELL_EBUSY;
 	}
@@ -129,6 +137,7 @@ s32 sys_rwlock_runlock(u32 rw_lock_id)
 	LV2_LOCK;
 
 	std::shared_ptr<rwlock_t> rwlock;
+
 	if (!Emu.GetIdManager().GetIDData(rw_lock_id, rwlock))
 	{
 		return CELL_ESRCH;
@@ -139,9 +148,9 @@ s32 sys_rwlock_runlock(u32 rw_lock_id)
 		return CELL_EPERM;
 	}
 
-	if (!--rwlock->readers)
+	if (!--rwlock->readers && rwlock->wwaiters)
 	{
-		rwlock->cv.notify_one();
+		rwlock->wcv.notify_one();
 	}
 
 	return CELL_OK;
@@ -156,6 +165,7 @@ s32 sys_rwlock_wlock(PPUThread& CPU, u32 rw_lock_id, u64 timeout)
 	LV2_LOCK;
 
 	std::shared_ptr<rwlock_t> rwlock;
+
 	if (!Emu.GetIdManager().GetIDData(rw_lock_id, rwlock))
 	{
 		return CELL_ESRCH;
@@ -167,13 +177,13 @@ s32 sys_rwlock_wlock(PPUThread& CPU, u32 rw_lock_id, u64 timeout)
 	}
 
 	// protocol is ignored in current implementation
-	rwlock->waiters++; assert(rwlock->waiters > 0);
+	rwlock->wwaiters++;
 
 	while (rwlock->readers || rwlock->writer)
 	{
 		if (timeout && get_system_time() - start_time > timeout)
 		{
-			rwlock->waiters--; assert(rwlock->waiters >= 0);
+			rwlock->wwaiters--;
 			return CELL_ETIMEDOUT;
 		}
 
@@ -183,11 +193,11 @@ s32 sys_rwlock_wlock(PPUThread& CPU, u32 rw_lock_id, u64 timeout)
 			return CELL_OK;
 		}
 
-		rwlock->cv.wait_for(lv2_lock, std::chrono::milliseconds(1));
+		rwlock->wcv.wait_for(lv2_lock, std::chrono::milliseconds(1));
 	}
 
 	rwlock->writer = CPU.GetId();
-	rwlock->waiters--; assert(rwlock->waiters >= 0);
+	rwlock->wwaiters--;
 
 	return CELL_OK;
 }
@@ -199,6 +209,7 @@ s32 sys_rwlock_trywlock(PPUThread& CPU, u32 rw_lock_id)
 	LV2_LOCK;
 
 	std::shared_ptr<rwlock_t> rwlock;
+
 	if (!Emu.GetIdManager().GetIDData(rw_lock_id, rwlock))
 	{
 		return CELL_ESRCH;
@@ -209,7 +220,7 @@ s32 sys_rwlock_trywlock(PPUThread& CPU, u32 rw_lock_id)
 		return CELL_EDEADLK;
 	}
 
-	if (rwlock->readers || rwlock->writer || rwlock->waiters)
+	if (rwlock->readers || rwlock->writer || rwlock->wwaiters)
 	{
 		return CELL_EBUSY;
 	}
@@ -226,6 +237,7 @@ s32 sys_rwlock_wunlock(PPUThread& CPU, u32 rw_lock_id)
 	LV2_LOCK;
 
 	std::shared_ptr<rwlock_t> rwlock;
+
 	if (!Emu.GetIdManager().GetIDData(rw_lock_id, rwlock))
 	{
 		return CELL_ESRCH;
@@ -237,7 +249,15 @@ s32 sys_rwlock_wunlock(PPUThread& CPU, u32 rw_lock_id)
 	}
 
 	rwlock->writer = 0;
-	rwlock->cv.notify_all();
+
+	if (rwlock->wwaiters)
+	{
+		rwlock->wcv.notify_one();
+	}
+	else if (rwlock->rwaiters)
+	{
+		rwlock->rcv.notify_all();
+	}
 
 	return CELL_OK;
 }

rpcs3/Emu/SysCalls/lv2/sys_rwlock.h

@@ -23,16 +23,19 @@ struct rwlock_t
 	std::atomic<u32> readers; // reader count
 	std::atomic<u32> writer; // writer id
 
-	// TODO: use sleep queue, possibly remove condition variable
-	std::condition_variable cv;
-	std::atomic<s32> waiters;
+	// TODO: use sleep queue, possibly remove condition variables
+	std::condition_variable rcv;
+	std::condition_variable wcv;
+	std::atomic<u32> rwaiters;
+	std::atomic<u32> wwaiters;
 
 	rwlock_t(u32 protocol, u64 name)
 		: protocol(protocol)
 		, name(name)
 		, readers(0)
 		, writer(0)
-		, waiters(0)
+		, rwaiters(0)
+		, wwaiters(0)
 	{
 	}
 };

rpcs3/Emu/SysCalls/lv2/sys_semaphore.cpp

@@ -62,6 +62,7 @@ s32 sys_semaphore_destroy(u32 sem)
 	LV2_LOCK;
 
 	std::shared_ptr<semaphore_t> semaphore;
+
 	if (!Emu.GetIdManager().GetIDData(sem, semaphore))
 	{
 		return CELL_ESRCH;
@@ -86,19 +87,20 @@ s32 sys_semaphore_wait(u32 sem, u64 timeout)
 	LV2_LOCK;
 
 	std::shared_ptr<semaphore_t> semaphore;
+
 	if (!Emu.GetIdManager().GetIDData(sem, semaphore))
 	{
 		return CELL_ESRCH;
 	}
 
 	// protocol is ignored in current implementation
-	semaphore->waiters++; assert(semaphore->waiters > 0);
+	semaphore->waiters++;
 
 	while (semaphore->value <= 0)
 	{
 		if (timeout && get_system_time() - start_time > timeout)
 		{
-			semaphore->waiters--; assert(semaphore->waiters >= 0);
+			semaphore->waiters--;
 			return CELL_ETIMEDOUT;
 		}
 
@@ -112,7 +114,7 @@ s32 sys_semaphore_wait(u32 sem, u64 timeout)
 	}
 
 	semaphore->value--;
-	semaphore->waiters--; assert(semaphore->waiters >= 0);
+	semaphore->waiters--;
 
 	return CELL_OK;
 }
@@ -124,6 +126,7 @@ s32 sys_semaphore_trywait(u32 sem)
 	LV2_LOCK;
 
 	std::shared_ptr<semaphore_t> semaphore;
+
 	if (!Emu.GetIdManager().GetIDData(sem, semaphore))
 	{
 		return CELL_ESRCH;
@@ -146,6 +149,7 @@ s32 sys_semaphore_post(u32 sem, s32 count)
 	LV2_LOCK;
 
 	std::shared_ptr<semaphore_t> semaphore;
+
 	if (!Emu.GetIdManager().GetIDData(sem, semaphore))
 	{
 		return CELL_ESRCH;
@@ -156,13 +160,20 @@ s32 sys_semaphore_post(u32 sem, s32 count)
 		return CELL_EINVAL;
 	}
 
-	if (semaphore->value + count > semaphore->max + semaphore->waiters)
+	const u64 new_value = semaphore->value + count;
+	const u64 max_value = semaphore->max + semaphore->waiters;
+
+	if (new_value > max_value)
 	{
 		return CELL_EBUSY;
 	}
 
-	semaphore->value += count; assert(semaphore->value >= 0);
-	semaphore->cv.notify_all();
+	semaphore->value += count;
+
+	if (semaphore->waiters)
+	{
+		semaphore->cv.notify_all();
+	}
 
 	return CELL_OK;
 }
@@ -179,6 +190,7 @@ s32 sys_semaphore_get_value(u32 sem, vm::ptr<s32> count)
 	LV2_LOCK;
 
 	std::shared_ptr<semaphore_t> semaphore;
+
 	if (!Emu.GetIdManager().GetIDData(sem, semaphore))
 	{
 		return CELL_ESRCH;

rpcs3/Emu/SysCalls/lv2/sys_semaphore.h

@@ -25,7 +25,7 @@ struct semaphore_t
 
 	// TODO: use sleep queue, possibly remove condition variable
 	std::condition_variable cv;
-	std::atomic<s32> waiters;
+	std::atomic<u32> waiters;
 
 	semaphore_t(u32 protocol, s32 max, u64 name, s32 value)
 		: protocol(protocol)

rpcs3/Emu/SysCalls/lv2/sys_timer.cpp

@@ -32,8 +32,7 @@ s32 sys_timer_create(vm::ptr<u32> timer_id)
 
 					if (queue)
 					{
-						queue->events.emplace_back(timer->source, timer->data1, timer->data2, timer->start);
-						queue->cv.notify_one();
+						queue->push(timer->source, timer->data1, timer->data2, timer->start);
 					}
 
 					if (timer->period && queue)
@@ -64,6 +63,7 @@ s32 sys_timer_destroy(u32 timer_id)
 	LV2_LOCK;
 
 	std::shared_ptr<lv2_timer_t> timer;
+
 	if (!Emu.GetIdManager().GetIDData(timer_id, timer))
 	{
 		return CELL_ESRCH;
@@ -86,6 +86,7 @@ s32 sys_timer_get_information(u32 timer_id, vm::ptr<sys_timer_information_t> inf
 	LV2_LOCK;
 	
 	std::shared_ptr<lv2_timer_t> timer;
+
 	if (!Emu.GetIdManager().GetIDData(timer_id, timer))
 	{
 		return CELL_ESRCH;
@@ -94,7 +95,6 @@ s32 sys_timer_get_information(u32 timer_id, vm::ptr<sys_timer_information_t> inf
 	info->next_expiration_time = timer->start;
 
 	info->period = timer->period;
-
 	info->timer_state = timer->state;
 
 	return CELL_OK;
@@ -109,6 +109,7 @@ s32 _sys_timer_start(u32 timer_id, u64 base_time, u64 period)
 	LV2_LOCK;
 
 	std::shared_ptr<lv2_timer_t> timer;
+
 	if (!Emu.GetIdManager().GetIDData(timer_id, timer))
 	{
 		return CELL_ESRCH;
@@ -160,6 +161,7 @@ s32 sys_timer_stop(u32 timer_id)
 	LV2_LOCK;
 
 	std::shared_ptr<lv2_timer_t> timer;
+
 	if (!Emu.GetIdManager().GetIDData(timer_id, timer))
 	{
 		return CELL_ESRCH;
@@ -204,6 +206,7 @@ s32 sys_timer_disconnect_event_queue(u32 timer_id)
 	LV2_LOCK;
 
 	std::shared_ptr<lv2_timer_t> timer;
+
 	if (!Emu.GetIdManager().GetIDData(timer_id, timer))
 	{
 		return CELL_ESRCH;