mutex.hpp

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#pragma once
 
#include <cortex/tiny_fiber/detail/fiber.hpp>
 
#include <deque>
 
namespace cortex::tiny_fiber {
 
class Mutex {
public:
    class Guard {
    public:
        explicit Guard(Mutex& mutex);
        ~Guard();
 
        Guard(const Guard&) = delete;
        Guard& operator=(const Guard&) = delete;
 
        Guard(Guard&& other) noexcept;
        Guard& operator=(Guard&& other) noexcept;
 
    private:
        friend class ConditionVariable;
 
        Mutex* mutex_ {nullptr};
    };
 
    Mutex() = default;
    ~Mutex();
 
    Mutex(const Mutex&) = delete;
    Mutex& operator=(const Mutex&) = delete;
 
    void Lock();
 
    bool TryLock();
 
    void Unlock();
 
    [[nodiscard]] bool IsLocked() const noexcept {
        return locked_;
    }
 
private:
    friend class ConditionVariable;
 
    bool locked_ {false};
    detail::Fiber* owner_ {nullptr};
    std::deque<detail::Fiber*> waiters_;
};
 
[[nodiscard]] inline Mutex::Guard Lock(Mutex& mutex) {
    return Mutex::Guard(mutex);
}
 
} // namespace cortex::tiny_fiber