Spinlock Class Reference

Public Member Functions
NOINLINE void	lock ()
ALWAYS_INLINE void	unlock ()

Constructor & Destructor Documentation

Spinlock()

ALWAYS_INLINE Spinlock::Spinlock ( )

inline

: val (0) {}

Member Function Documentation

lock()

NOINLINE void Spinlock::lock ( )

inline

        {
            uint16 tmp = 0x100;
 
            asm volatile ("     lock; xadd %0, %1;  "
                          "1:   cmpb %h0, %b0;      "
                          "     je 2f;              "
                          "     pause;              "
                          "     movb %1, %b0;       "
                          "     jmp 1b;             "
                          "2:                       "
                          : "+Q" (tmp), "+m" (val) : : "memory");
        }

unlock()

ALWAYS_INLINE void Spinlock::unlock ( )

inline

        {
            asm volatile ("incb %0" : "=m" (val) : : "memory");
        }

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The documentation for this class was generated from the following file:

• include/spinlock.h