tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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kernel / scripts / atomic / fallbacks / dec_unless_positive
at v5.13 255 B view raw
1cat <<EOF 2static __always_inline bool 3${arch}${atomic}_dec_unless_positive(${atomic}_t *v) 4{ 5 ${int} c = ${arch}${atomic}_read(v); 6 7 do { 8 if (unlikely(c > 0)) 9 return false; 10 } while (!${arch}${atomic}_try_cmpxchg(v, &c, c - 1)); 11 12 return true; 13} 14EOF