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.section ".text", #alloc, #execinstr
.align 8
.skip 16
.global canlock
.type canlock,2
canlock:
or %g0,1,%o1
swap [%o0],%o1 ! o0 points to lock; key is first word
cmp %o1,1
bne .gotit
nop
retl ! key was 1
or %g0,0,%o0
.gotit:
retl ! key was not 1
or %g0,1,%o0
.size canlock,(.-canlock)
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