diff options
Diffstat (limited to 'signal.c')
-rw-r--r-- | signal.c | 13 |
1 files changed, 12 insertions, 1 deletions
@@ -23,7 +23,7 @@ # include "nacl/signal.h" #endif -#ifdef NEED_RUBY_ATOMIC_EXCHANGE +#ifdef NEED_RUBY_ATOMIC_OPS rb_atomic_t ruby_atomic_exchange(rb_atomic_t *ptr, rb_atomic_t val) { @@ -31,6 +31,17 @@ ruby_atomic_exchange(rb_atomic_t *ptr, rb_atomic_t val) *ptr = val; return old; } + +rb_atomic_t +ruby_atomic_compare_and_swap(rb_atomic_t *ptr, rb_atomic_t cmp, + rb_atomic_t newval) +{ + rb_atomic_t old = *ptr; + if (old == cmp) { + *ptr = newval; + } + return old; +} #endif #if defined(__BEOS__) || defined(__HAIKU__) |