bsdkm: add atomic_fcmpset_ptr.

Author: philljj

wolfcrypt/src/wc_port.c

@@ -1352,12 +1352,20 @@ int wolfSSL_Atomic_Int_CompareExchange(wolfSSL_Atomic_Int* c, int *expected_i,
 int wolfSSL_Atomic_Uint_CompareExchange(
     wolfSSL_Atomic_Uint* c, unsigned int *expected_i, unsigned int new_i)
 {
-    u_int exp = (u_int) *expected_i;
+    u_int exp = (u_int)*expected_i;
     int ret = atomic_fcmpset_int(c, &exp, new_i);
     *expected_i = (unsigned int)exp;
     return ret;
 }
 
+int wolfSSL_Atomic_Ptr_CompareExchange(
+    void **c, void **expected_ptr, void *new_ptr)
+{
+    uintptr_t exp = (uintptr_t)*expected_ptr;
+    int ret = atomic_fcmpset_ptr((uintptr_t *)c, &exp, (uintptr_t)new_ptr);
+    *expected_ptr = (void *)exp;
+    return ret;
+}
 
 #elif defined(HAVE_C___ATOMIC) && defined(WOLFSSL_HAVE_ATOMIC_H) && \
         !defined(__cplusplus)

wolfcrypt/test/test.c

@@ -20061,6 +20061,8 @@ WOLFSSL_TEST_SUBROUTINE wc_test_ret_t memory_test(void)
 #endif
         int int_expected;
         unsigned int uint_expected;
+        void * a_ptr = NULL;
+        void * ptr_expected = NULL;
 
         if (WOLFSSL_ATOMIC_LOAD(a_int) != -2)
             return WC_TEST_RET_ENC_NC;
@@ -20131,6 +20133,13 @@ WOLFSSL_TEST_SUBROUTINE wc_test_ret_t memory_test(void)
             return WC_TEST_RET_ENC_NC;
         if (WOLFSSL_ATOMIC_LOAD(a_uint) != 7)
             return WC_TEST_RET_ENC_NC;
+
+        a_ptr = NULL;
+        ptr_expected = NULL;
+        if (! wolfSSL_Atomic_Ptr_CompareExchange(&a_ptr, &ptr_expected, &ret))
+            return WC_TEST_RET_ENC_NC;
+        if (a_ptr != &ret)
+            return WC_TEST_RET_ENC_NC;
     }
 
     return ret;