Move to kernel style SPDX license identifiers

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

diff --git a/include/lttng/ust-tracer.h b/include/lttng/ust-tracer.h
index dafb69349caead11160faafd82069a12662f4be0..9593609db348b845242e06dcf27648072175ac32 100644 (file)
--- a/include/lttng/ust-tracer.h
+++ b/include/lttng/ust-tracer.h
@@ -1,25 +1,25 @@
-#ifndef _LTTNG_TRACER_H
-#define _LTTNG_TRACER_H
-
 /*
- * Copyright (C) 2005-2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This contains the core definitions for the Linux Trace Toolkit.
+ * SPDX-License-Identifier: MIT
  *
- * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
- * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
+ * Copyright (C) 2005-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  *
- * Permission is hereby granted to use or copy this program
- * for any purpose,  provided the above notices are retained on all copies.
- * Permission to modify the code and to distribute modified code is granted,
- * provided the above notices are retained, and a notice that the code was
- * modified is included with the above copyright notice.
+ * This contains the core definitions for the Linux Trace Toolkit.
  */
 
-#include <lttng/config.h>
+#ifndef _LTTNG_UST_TRACER_H
+#define _LTTNG_UST_TRACER_H
+
+#include <limits.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
@@ -34,6 +34,32 @@
 #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, unsigned char) || \
+               __builtin_types_compatible_p(type, short) || \
+               __builtin_types_compatible_p(type, unsigned short) || \
+               __builtin_types_compatible_p(type, int) || \
+               __builtin_types_compatible_p(type, unsigned int) || \
+               __builtin_types_compatible_p(type, long) || \
+               __builtin_types_compatible_p(type, unsigned long) || \
+               __builtin_types_compatible_p(type, long long) || \
+               __builtin_types_compatible_p(type, unsigned long long))
+#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 */