Commit | Line | Data |
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35897f8b | 1 | /* |
c0c0989a | 2 | * SPDX-License-Identifier: LGPL-2.1-only |
35897f8b | 3 | * |
c0c0989a | 4 | * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
35897f8b MD |
5 | */ |
6 | ||
c0c0989a MJ |
7 | #ifndef _LTTNG_UST_HELPER_H |
8 | #define _LTTNG_UST_HELPER_H | |
9 | ||
35897f8b MD |
10 | #include <stdlib.h> |
11 | ||
415dfaf7 | 12 | static inline __attribute__((always_inline)) |
35897f8b MD |
13 | void *zmalloc(size_t len) |
14 | { | |
15 | return calloc(len, 1); | |
16 | } | |
17 | ||
18 | #define max_t(type, x, y) \ | |
19 | ({ \ | |
20 | type __max1 = (x); \ | |
21 | type __max2 = (y); \ | |
22 | __max1 > __max2 ? __max1: __max2; \ | |
23 | }) | |
24 | ||
25 | #define min_t(type, x, y) \ | |
26 | ({ \ | |
27 | type __min1 = (x); \ | |
28 | type __min2 = (y); \ | |
29 | __min1 <= __min2 ? __min1: __min2; \ | |
30 | }) | |
31 | ||
fd67a004 MD |
32 | #define LTTNG_ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) |
33 | ||
171fcc6f MD |
34 | /* |
35 | * Use of __builtin_return_address(0) sometimes seems to cause stack | |
36 | * corruption on 32-bit PowerPC. Disable this feature on that | |
37 | * architecture for now by always using the NULL value for the ip | |
38 | * context. | |
39 | */ | |
40 | #if defined(__PPC__) && !defined(__PPC64__) | |
41 | #define LTTNG_UST_CALLER_IP() NULL | |
42 | #else /* #if defined(__PPC__) && !defined(__PPC64__) */ | |
43 | #define LTTNG_UST_CALLER_IP() __builtin_return_address(0) | |
44 | #endif /* #else #if defined(__PPC__) && !defined(__PPC64__) */ | |
45 | ||
94be38e8 JR |
46 | /* |
47 | * LTTNG_HIDDEN: set the hidden attribute for internal functions | |
48 | * On Windows, symbols are local unless explicitly exported, | |
49 | * see https://gcc.gnu.org/wiki/Visibility | |
50 | */ | |
51 | #if defined(_WIN32) || defined(__CYGWIN__) | |
52 | #define LTTNG_HIDDEN | |
53 | #else | |
54 | #define LTTNG_HIDDEN __attribute__((visibility("hidden"))) | |
55 | #endif | |
56 | ||
35897f8b | 57 | #endif /* _LTTNG_UST_HELPER_H */ |