General Purpose library for Freestanding C++ and POSIX systems
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#pragma once
#include <atomic>
#include "gp_config.hpp"
namespace gp {
template<typename T>
class lock_guard {
T& ref;
public:
lock_guard(T& _ref)
: ref(_ref)
{
ref.lock();
}
~lock_guard() {
ref.unlock();
}
};
/**
* @brief A fast mutual exclusion handler WITHOUT deadlock detection
*/
class fast_bottleneck {
std::atomic_bool flag;
public:
fast_bottleneck() = default;
fast_bottleneck(fast_bottleneck&) = delete;
fast_bottleneck(fast_bottleneck&&) = delete;
void lock() {
while(not try_lock());
}
[[nodiscard]] bool try_lock() {
bool f = false;
bool t = true;
return flag.compare_exchange_strong(f,t,std::memory_order::acquire);
}
void unlock() {
gp_config::assertion(try_unlock(), "Unlocking failed in fast_bottleneck: potential double unlocking issue");
}
[[nodiscard]] bool try_unlock() {
bool f = false;
bool t = true;
return flag.compare_exchange_strong(t,f,std::memory_order::release);
}
};
}