Document GIL assumptions in CApiContext.(getOrCreate|free)SmallInts

Author: fangerer

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/cext/capi/CApiContext.java

@@ -350,6 +350,8 @@ public PrimitiveNativeWrapper getCachedPrimitiveNativeWrapper(long l) {
      */
     Object getOrCreateSmallInts() {
         CompilerAsserts.neverPartOfCompilation();
+        // TODO(fa): this should not require the GIL (GR-51314)
+        assert getContext().ownsGil();
         if (nativeSmallIntsArray == null) {
             int nSmallNegativeInts = CConstants._PY_NSMALLNEGINTS.intValue();
             int nSmallPositiveInts = CConstants._PY_NSMALLPOSINTS.intValue();
@@ -364,6 +366,8 @@ Object getOrCreateSmallInts() {
 
     private void freeSmallInts() {
         CompilerAsserts.neverPartOfCompilation();
+        // TODO(fa): this should not require the GIL (GR-51314)
+        assert getContext().ownsGil();
         if (nativeSmallIntsArray != null) {
             int nSmallNegativeInts = CConstants._PY_NSMALLNEGINTS.intValue();
             int nSmallPositiveInts = CConstants._PY_NSMALLPOSINTS.intValue();