Add compile time assertion that array and sequence have integer elements

[lttng-ust.git] / include / lttng / ust-tracer.h

diff --git a/include/lttng/ust-tracer.h b/include/lttng/ust-tracer.h
index 234e75c084a2d47fbfe3226c63b06605875eb8d5..c04d6247f57e0a3af082bed1ff1799594871ed4b 100644 (file)
--- a/include/lttng/ust-tracer.h
+++ b/include/lttng/ust-tracer.h
@@ -1,37 +1,47 @@
-#ifndef _LTTNG_TRACER_H
-#define _LTTNG_TRACER_H
+#ifndef _LTTNG_UST_TRACER_H
+#define _LTTNG_UST_TRACER_H
 
 /*
  * Copyright (C) 2005-2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  *
  * This contains the core definitions for the Linux Trace Toolkit.
  *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; version 2.1 of
- * the License.
+ * Copyright 2011-2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
  *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
  */
 
-#include <lttng/config.h>
+#include <stdint.h>
+
+#if defined (__cplusplus)
+#include <type_traits>
+#endif
+
+#include <lttng/ust-compiler.h>
+#include <lttng/ust-config.h>
+#include <lttng/ust-version.h>
 
-#ifndef HAVE_EFFICIENT_UNALIGNED_ACCESS
+#ifndef LTTNG_UST_HAVE_EFFICIENT_UNALIGNED_ACCESS
 /* Align data on its natural alignment */
 #define RING_BUFFER_ALIGN
 #endif
 
-#define LTTNG_UST_VERSION 0
-#define LTTNG_UST_PATCHLEVEL 9
-#define LTTNG_UST_SUBLEVEL 1
-
 #ifndef CHAR_BIT
 #define CHAR_BIT 8
 #endif
@@ -42,6 +52,31 @@
 #define lttng_alignof(type)    1
 #endif
 
-#define lttng_is_signed_type(type)           (((type)(-1)) < 0)
+#define lttng_is_signed_type(type)           ((type) -1 < (type) 0)
+
+/*
+ * This macro adds a compilation assertion that CTF arrays and sequences
+ * declared by the users are of an integral type.
+ */
+
+#if defined(__cplusplus)
+#define _lttng_is_integer(type) (std::is_integral<type>::value)
+#else
+#define _lttng_is_integer(type) (__builtin_types_compatible_p(type, _Bool) || \
+               __builtin_types_compatible_p(type, char) || \
+               __builtin_types_compatible_p(type, int8_t) || \
+               __builtin_types_compatible_p(type, uint8_t) || \
+               __builtin_types_compatible_p(type, int16_t) || \
+               __builtin_types_compatible_p(type, uint16_t) || \
+               __builtin_types_compatible_p(type, int32_t) || \
+               __builtin_types_compatible_p(type, uint32_t) || \
+               __builtin_types_compatible_p(type, int64_t) || \
+               __builtin_types_compatible_p(type, uint64_t))
+#endif
+
+#define _lttng_array_element_type_is_supported(_type, _item) \
+               lttng_static_assert(_lttng_is_integer(_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);
 
-#endif /* _LTTNG_TRACER_CORE_H */
+#endif /* _LTTNG_UST_TRACER_H */