bsnes/hiro/core/lock.hpp

53 lines
860 B
C++

#pragma once
//shared functionality used for pObject on all platforms
struct mLock {
struct Handle {
Handle(const mLock* self) : self(self) {
if(self) {
++self->locks;
}
}
~Handle() {
release();
}
auto release() -> bool {
if(self) {
--self->locks;
self = nullptr;
return true;
}
return false;
}
const mLock* self = nullptr;
};
auto acquired() const -> bool {
return locks || Application::state.quit;
}
auto acquire() const -> Handle {
return {this};
}
//deprecated C-style manual functions
//prefer RAII acquire() functionality instead in newly written code
auto locked() const -> bool {
return acquired();
}
auto lock() -> void {
++locks;
}
auto unlock() -> void {
--locks;
}
mutable int locks = 0;
};