atomics: fix setonce runtime intrinsic

vtjnash · vtjnash · commit 9723ff179811 · 2024-08-19T17:05:11.000Z
diff --git a/src/datatype.c b/src/datatype.c
@@ -2176,7 +2176,7 @@ inline int setonce_bits(jl_datatype_t *rty, char *p, jl_value_t *parent, jl_valu
     }
     else {
         char *px = lock(p, parent, needlock, isatomic);
-        success = undefref_check(rty, (jl_value_t*)px) != NULL;
+        success = undefref_check(rty, (jl_value_t*)px) == NULL;
         if (success)
             memassign_safe(hasptr, px, rhs, fsz);
         unlock(p, parent, needlock, isatomic);

Original file line number	Diff line number	Diff line change
`@@ -2176,7 +2176,7 @@ inline int setonce_bits(jl_datatype_t rty, char p, jl_value_t *parent, jl_valu`
`2176`	`2176`	`}`
`2177`	`2177`	`else {`
`2178`	`2178`	`char *px = lock(p, parent, needlock, isatomic);`
`2179`		`- success = undefref_check(rty, (jl_value_t*)px) != NULL;`
	`2179`	`+ success = undefref_check(rty, (jl_value_t*)px) == NULL;`
`2180`	`2180`	`if (success)`
`2181`	`2181`	`memassign_safe(hasptr, px, rhs, fsz);`
`2182`	`2182`	`unlock(p, parent, needlock, isatomic);`