2 * SPDX-License-Identifier: MIT
4 * Copyright (C) 2005-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
6 * This contains the core definitions for the Linux Trace Toolkit.
9 #ifndef _LTTNG_UST_TRACER_H
10 #define _LTTNG_UST_TRACER_H
14 #if defined (__cplusplus)
15 #include <type_traits>
18 #include <lttng/ust-compiler.h>
19 #include <lttng/ust-config.h>
20 #include <lttng/ust-version.h>
22 #ifndef LTTNG_UST_HAVE_EFFICIENT_UNALIGNED_ACCESS
23 /* Align data on its natural alignment */
24 #define RING_BUFFER_ALIGN
31 #ifdef RING_BUFFER_ALIGN
32 #define lttng_alignof(type) __alignof__(type)
34 #define lttng_alignof(type) 1
37 #define lttng_is_signed_type(type) ((type) -1 < (type) 0)
40 * This macro adds a compilation assertion that CTF arrays and sequences
41 * declared by the users are of an integral type.
44 #if defined(__cplusplus)
45 #define _lttng_is_integer(type) (std::is_integral<type>::value)
47 #define _lttng_is_integer(type) (__builtin_types_compatible_p(type, _Bool) || \
48 __builtin_types_compatible_p(type, char) || \
49 __builtin_types_compatible_p(type, unsigned char) || \
50 __builtin_types_compatible_p(type, short) || \
51 __builtin_types_compatible_p(type, unsigned short) || \
52 __builtin_types_compatible_p(type, int) || \
53 __builtin_types_compatible_p(type, unsigned int) || \
54 __builtin_types_compatible_p(type, long) || \
55 __builtin_types_compatible_p(type, unsigned long) || \
56 __builtin_types_compatible_p(type, long long) || \
57 __builtin_types_compatible_p(type, unsigned long long))
60 #define _lttng_array_element_type_is_supported(_type, _item) \
61 lttng_static_assert(_lttng_is_integer(_type), \
62 "Non-integer type `" #_item "` not supported as element of CTF_ARRAY or CTF_SEQUENCE", \
63 Non_integer_type__##_item##__not_supported_as_element_of_CTF_ARRAY_or_CTF_SEQUENCE);
65 #endif /* _LTTNG_UST_TRACER_H */
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