Quantcast
Channel: Active questions tagged gcc - Stack Overflow
Viewing all articles
Browse latest Browse all 22149

x86 spinlock using cmpxchg

$
0
0

I'm new to using gcc inline assembly, and was wondering if, on an x86 multi-core machine, a spinlock (without race conditions) could be implemented as (using AT&T syntax):

spin_lock:
mov 0 eax
lock cmpxchg 1 [lock_addr]
jnz spin_lock
ret

spin_unlock:
lock mov 0 [lock_addr]
ret

Viewing all articles
Browse latest Browse all 22149

Trending Articles



<script src="https://jsc.adskeeper.com/r/s/rssing.com.1596347.js" async> </script>