Exemplos de _sys_lwmutex_lock em C++ (Cpp)

Exemplo n.º 1

Arquivo: sys_lwmutex_.cpp Projeto: mailwl/rpcs3

error_code sys_lwmutex_lock(ppu_thread& ppu, vm::ptr<sys_lwmutex_t> lwmutex, u64 timeout)
{
	sysPrxForUser.trace("sys_lwmutex_lock(lwmutex=*0x%x, timeout=0x%llx)", lwmutex, timeout);

	if (g_cfg.core.hle_lwmutex)
	{
		return sys_mutex_lock(ppu, lwmutex->sleep_queue, timeout);
	}

	const be_t<u32> tid(ppu.id);

	// try to lock lightweight mutex
	const be_t<u32> old_owner = lwmutex->vars.owner.compare_and_swap(lwmutex_free, tid);

	if (old_owner == lwmutex_free)
	{
		// locking succeeded
		return CELL_OK;
	}

	if (old_owner == tid)
	{
		// recursive locking

		if ((lwmutex->attribute & SYS_SYNC_RECURSIVE) == 0)
		{
			// if not recursive
			return CELL_EDEADLK;
		}

		if (lwmutex->recursive_count == -1)
		{
			// if recursion limit reached
			return CELL_EKRESOURCE;
		}

		// recursive locking succeeded
		lwmutex->recursive_count++;
		_mm_mfence();

		return CELL_OK;
	}

	if (old_owner == lwmutex_dead)
	{
		// invalid or deleted mutex
		return CELL_EINVAL;
	}

	for (u32 i = 0; i < 10; i++)
	{
		busy_wait();

		if (lwmutex->vars.owner.load() == lwmutex_free)
		{
			if (lwmutex->vars.owner.compare_and_swap_test(lwmutex_free, tid))
			{
				// locking succeeded
				return CELL_OK;
			}
		}
	}

	// atomically increment waiter value using 64 bit op
	lwmutex->all_info++;

	if (lwmutex->vars.owner.compare_and_swap_test(lwmutex_free, tid))
	{
		// locking succeeded
		--lwmutex->all_info;

		return CELL_OK;
	}

	// lock using the syscall
	const error_code res = _sys_lwmutex_lock(ppu, lwmutex->sleep_queue, timeout);

	lwmutex->all_info--;

	if (res == CELL_OK)
	{
		// locking succeeded
		auto old = lwmutex->vars.owner.exchange(tid);

		if (old != lwmutex_reserved)
		{
			fmt::throw_exception("Locking failed (lwmutex=*0x%x, owner=0x%x)" HERE, lwmutex, old);
		}

		return CELL_OK;
	}

	if (res == CELL_EBUSY && lwmutex->attribute & SYS_SYNC_RETRY)
	{
		while (true)
		{
			for (u32 i = 0; i < 10; i++)
			{
				busy_wait();

				if (lwmutex->vars.owner.load() == lwmutex_free)
				{
					if (lwmutex->vars.owner.compare_and_swap_test(lwmutex_free, tid))
					{
						return CELL_OK;
					}
				}
			}

			lwmutex->all_info++;

			if (lwmutex->vars.owner.compare_and_swap_test(lwmutex_free, tid))
			{
				lwmutex->all_info--;
				return CELL_OK;
			}

			const u64 time0 = timeout ? get_system_time() : 0;

			const error_code res_ = _sys_lwmutex_lock(ppu, lwmutex->sleep_queue, timeout);

			if (res_ == CELL_OK)
			{
				lwmutex->vars.owner.release(tid);
			}
			else if (timeout && res_ != CELL_ETIMEDOUT)
			{
				const u64 time_diff = get_system_time() - time0;

				if (timeout <= time_diff)
				{
					lwmutex->all_info--;
					return not_an_error(CELL_ETIMEDOUT);
				}

				timeout -= time_diff;
			}

			lwmutex->all_info--;

			if (res_ != CELL_EBUSY)
			{
				return res_;
			}
		}
	}

	return res;
}

Exemplo n.º 2

Arquivo: sysPrxForUser.cpp Projeto: William-Davidoffich/rpcs3

s32 sys_lwmutex_lock(PPUThread& CPU, vm::ptr<sys_lwmutex_t> lwmutex, u64 timeout)
{
	sysPrxForUser.Log("sys_lwmutex_lock(lwmutex=*0x%x, timeout=0x%llx)", lwmutex, timeout);

	const be_t<u32> tid = be_t<u32>::make(CPU.GetId());

	// try to lock lightweight mutex
	const be_t<u32> old_owner = lwmutex->owner.compare_and_swap(lwmutex::free, tid);

	if (old_owner.data() == se32(lwmutex_free))
	{
		// locking succeeded
		return CELL_OK;
	}

	if (old_owner.data() == tid.data())
	{
		// recursive locking

		if ((lwmutex->attribute.data() & se32(SYS_SYNC_RECURSIVE)) == 0)
		{
			// if not recursive
			return CELL_EDEADLK;
		}

		if (lwmutex->recursive_count.data() == -1)
		{
			// if recursion limit reached
			return CELL_EKRESOURCE;
		}

		// recursive locking succeeded
		lwmutex->recursive_count++;
		lwmutex->lock_var.read_sync();

		return CELL_OK;
	}

	if (old_owner.data() == se32(lwmutex_dead))
	{
		// invalid or deleted mutex
		return CELL_EINVAL;
	}

	for (u32 i = 0; i < 300; i++)
	{
		if (lwmutex->owner.read_relaxed().data() == se32(lwmutex_free))
		{
			if (lwmutex->owner.compare_and_swap_test(lwmutex::free, tid))
			{
				// locking succeeded
				return CELL_OK;
			}
		}
	}

	// atomically increment waiter value using 64 bit op
	lwmutex->all_info++;

	if (lwmutex->owner.compare_and_swap_test(lwmutex::free, tid))
	{
		// locking succeeded
		lwmutex->all_info--;

		return CELL_OK;
	}

	// lock using the syscall
	const s32 res = _sys_lwmutex_lock(lwmutex->sleep_queue, timeout);

	lwmutex->all_info--;

	if (res == CELL_OK)
	{
		// locking succeeded
		auto old = lwmutex->owner.exchange(tid);

		if (old.data() != se32(lwmutex_reserved) && !Emu.IsStopped())
		{
			sysPrxForUser.Fatal("sys_lwmutex_lock(lwmutex=*0x%x): locking failed (owner=0x%x)", lwmutex, old);
		}

		return CELL_OK;
	}

	if (res == CELL_EBUSY && lwmutex->attribute.data() & se32(SYS_SYNC_RETRY))
	{
		// TODO (protocol is ignored in current implementation)
		throw __FUNCTION__;
	}

	return res;
}