X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=include%2Flttng%2Fust-utils.h;h=e60cdbe3b1a490934945d2c74ae93f86a0934384;hb=f04f60a5f613b5a850dbe0ee4e983f21803db1ed;hp=2a65dd5364ef21e996ea7c05d17dff9a09887e8f;hpb=cd9334104cf10f9476ecb26c7e1b8c819d048074;p=lttng-ust.git

diff --git a/include/lttng/ust-utils.h b/include/lttng/ust-utils.h
index 2a65dd53..e60cdbe3 100644
--- a/include/lttng/ust-utils.h
+++ b/include/lttng/ust-utils.h
@@ -59,15 +59,32 @@
 #endif
 
 /**
- * lttng_ust_ctf_array_element_type_is_supported -
+ * lttng_ust_is_pointer_type - check if type is a pointer
  *
- * Adds a compilation assertion that CTF arrays and sequences declared by the
- * user are of an integral type.
+ * Returns true if the type of @type is a pointer.
+ *
+ * Note: The C implementation of lttng_ust_is_pointer_type uses pointer
+ * arithmetic, which does not work on opaque pointer types.
+ */
+#if defined(__cplusplus)
+#define lttng_ust_is_pointer_type(type) (std::is_pointer<type>::value)
+#else
+/* The difference between two pointers is an integer. */
+#define lttng_ust_is_pointer_type(type) \
+	(lttng_ust_is_integer_type(typeof(((type)1 - (type)1))) && !lttng_ust_is_integer_type(type))
+#endif
+
+
+/**
+ * lttng_ust_field_array_element_type_is_supported -
+ *
+ * Adds a compilation assertion that array and sequence fields declared by the
+ * user are of an integral or pointer type.
  */
-#define lttng_ust_ctf_array_element_type_is_supported(type, item) \
-		lttng_static_assert(lttng_ust_is_integer_type(type), \
-			"Non-integer type `" #item "` not supported as element of CTF_ARRAY or CTF_SEQUENCE", \
-			Non_integer_type__##item##__not_supported_as_element_of_CTF_ARRAY_or_CTF_SEQUENCE);
+#define lttng_ust_field_array_element_type_is_supported(type, item) \
+		lttng_ust_static_assert(lttng_ust_is_integer_type(type) || lttng_ust_is_pointer_type(type), \
+			"Non-integer, non-pointer type `" #item "` not supported as element of LTTNG_UST_FIELD_ARRAY or LTTNG_UST_FIELD_SEQUENCE", \
+			Non_integer_type__##item##__not_supported_as_element_of_LTTNG_UST_FIELD_ARRAY_or_LTTNG_UST_FIELD_SEQUENCE)
 
 
 /**
@@ -138,7 +155,7 @@
  * @align_drift:  object offset from an "alignment"-aligned address.
  * @alignment:    natural object alignment. Must be non-zero, power of 2.
  *
- * Returns the offset that must be substracted to align towards lower addresses.
+ * Returns the offset that must be subtracted to align towards lower addresses.
  */
 #define lttng_ust_offset_align_floor(align_drift, alignment)		       \
 	({								       \