critical.hpp

#ifndef QOS_CPP_CRITICAL
#define QOS_CPP_CRITICAL
 
#include "include/types.hpp"
 
namespace qOS {


    using int_restorer_t = void (*)( uint32_t );

    using int_disabler_t = uint32_t (*)( void );

    namespace critical {


        inline void scope( void ) noexcept {}

        class lock final : private nonCopyable {
            private:
                static void enter( void ) noexcept;
                static void exit( void ) noexcept;
                static int_disabler_t disable;
                static int_restorer_t restore;
                static volatile uint32_t flags;
                static volatile int nestingLevel;
                bool entered{ true };
                friend bool setInterruptsED( const int_restorer_t rFcn, const int_disabler_t dFcn ) noexcept;
            public:
                lock() noexcept;
                ~lock() noexcept;
                explicit operator bool() noexcept;
        };

        bool setInterruptsED( const int_restorer_t rFcn, const int_disabler_t dFcn ) noexcept;

    }

}

/*============================================================================*/
#define scope                                                                  \
scope();                                                                       \
for ( critical::lock critical_lock; critical_lock; )                           \
/*============================================================================*/
 
#endif /*QOS_CPP_CRITICAL*/