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License: MIT License
Header-only pure C++11 library providing signal and slot functionality
License: MIT License
Here library calls foreign callbacks under mutex lock:
template<class TSlot, typename... TCallArgs>
void call(TCallArgs&&... args)
{
lock_guard lock(*this);
for (const auto& slot : slots_)
{
if (!slot.call)
continue;
TSlot(slot.key).call(std::forward<TCallArgs>(args)...);
}
}
template<class TInit, class TSlot, typename... TCallArgs>
TInit accumulate(TInit&& init, TCallArgs&&... args)
{
static_assert(std::is_same<typename TSlot::result_type, void>::value == false, "Cannot accumulate slot return values of type 'void'");
lock_guard lock(*this);
for (const auto& slot : slots_)
{
if (!slot.call)
continue;
init = init + TSlot(slot.key).call(std::forward<TCallArgs>(args)...);
}
return init;
}
Imagine that one thread connects to "signal1" own function "slot1" which fires "signal2". First, it locks "signal1" mutex, then attempts to lock "signal2" mutex.
Another thread connects to "signal2" own function "slot2" which fires "signal1". First, it locks "signal2" mutex, then attempts to lock "signal1" mutex.
In some cases, threads will enter into deadlock: thread1 always waits "signal2" mutex, while thread2 always waits "signal1" mutex.
Hi.
There is some way to do a slot auto disconnection when the slot object is no long available?
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