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Annotation of lucent/sys/src/liblock/taslock.c, revision 1.1

1.1     ! root        1: #include <u.h>
        !             2: #include <libc.h>
        !             3: #include <lock.h>
        !             4: 
        !             5: int    tas(int*);
        !             6: 
        !             7: void
        !             8: lockinit(void)
        !             9: {
        !            10: }
        !            11: 
        !            12: void
        !            13: lock(Lock *lk)
        !            14: {
        !            15:        while(tas(&lk->val))
        !            16:                sleep(0);
        !            17: }
        !            18: 
        !            19: int
        !            20: canlock(Lock *lk)
        !            21: {
        !            22:        if(tas(&lk->val))
        !            23:                return 0;
        !            24:        return 1;
        !            25: }
        !            26: 
        !            27: void
        !            28: unlock(Lock *lk)
        !            29: {
        !            30:        lk->val = 0;
        !            31: }

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