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Annotation of lucent/sys/src/liblock/taslock.c, revision 1.1.1.1

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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