Revision 164d1586 xseg/xtypes/xlock.h

b/xseg/xtypes/xlock.h
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#ifndef _XQ_LOCK_H
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#define _XQ_LOCK_H
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#ifndef _XLOCK_H
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#define _XLOCK_H
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#define MFENCE() __sync_synchronize()


  		





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#define BARRIER() __asm__ __volatile__ ("" ::: "memory")


  		





  ......




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#define Noone ((unsigned long)-1)


  		





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struct xq_lock {


  		





  
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struct xlock {


  		





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	long owner;


  		





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} __attribute__ ((aligned (16))); /* support up to 128bit longs */


  		





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static inline unsigned long xq_acquire(struct xq_lock *lock, unsigned long who)


  		





  
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static inline unsigned long xlock_acquire(struct xlock *lock, unsigned long who)


  		





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{


  		





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	for (;;) {


  		





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		for (; *(volatile unsigned long *)(&lock->owner) != Noone; )


  		





  ......




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	return who;


  		





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}


  		





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static inline void xq_release(struct xq_lock *lock)


  		





  
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static inline void xlock_release(struct xlock *lock)


  		





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{


  		





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	lock->owner = Noone;


  		





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}


  		





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static inline unsigned long xq_get_owner(struct xq_lock *lock)


  		





  
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static inline unsigned long xlock_get_owner(struct xlock *lock)


  		





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{


  		





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	return *(volatile unsigned long *)(&lock->owner);


  		





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}


  		












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