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Michal Vasko5aa44c02020-06-29 11:47:02 +02001/**
2 * @file compat.h
3 * @author Michal Vasko <mvasko@cesnet.cz>
4 * @brief compatibility functions header
5 *
Michal Vaskod304a082021-05-19 16:36:10 +02006 * Copyright (c) 2021 CESNET, z.s.p.o.
Michal Vasko5aa44c02020-06-29 11:47:02 +02007 *
8 * This source code is licensed under BSD 3-Clause License (the "License").
9 * You may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
11 *
12 * https://opensource.org/licenses/BSD-3-Clause
13 */
14
15#ifndef _COMPAT_H_
16#define _COMPAT_H_
17
Radek Krejciad97c5f2020-06-30 09:19:28 +020018#include <limits.h>
Michal Vaskod304a082021-05-19 16:36:10 +020019#include <pthread.h>
Christian Hopps6f326212021-03-23 12:37:29 -040020#include <stdarg.h>
Michal Vasko5aa44c02020-06-29 11:47:02 +020021#include <stdio.h>
22#include <sys/types.h>
Michal Vaskod304a082021-05-19 16:36:10 +020023#include <time.h>
Jan Kundrát099b7122021-12-09 23:51:15 +010024#include <unistd.h>
Michal Vasko5aa44c02020-06-29 11:47:02 +020025
26#ifndef __WORDSIZE
27# if defined __x86_64__ && !defined __ILP32__
28# define __WORDSIZE 64
29# else
30# define __WORDSIZE 32
31# endif
32#endif
33
34#ifndef __INT64_C
35# if __WORDSIZE == 64
Michal Vaskoe29489b2020-08-24 10:43:54 +020036# define __INT64_C(c) c ## L
Michal Vasko5aa44c02020-06-29 11:47:02 +020037# define __UINT64_C(c) c ## UL
38# else
Michal Vaskoe29489b2020-08-24 10:43:54 +020039# define __INT64_C(c) c ## LL
Michal Vasko5aa44c02020-06-29 11:47:02 +020040# define __UINT64_C(c) c ## ULL
41# endif
42#endif
43
Jan Kundrát654d9ff2021-12-09 02:48:26 +010044#if defined (__GNUC__) || defined (__llvm__)
Michal Vaskoc5a22832020-08-20 13:21:33 +020045# define UNUSED(x) UNUSED_ ## x __attribute__((__unused__))
46# define _PACKED __attribute__((__packed__))
47#else
48# define UNUSED(x) UNUSED_ ## x
49# define _PACKED
50#endif
51
Michal Vasko5aa44c02020-06-29 11:47:02 +020052#cmakedefine HAVE_VDPRINTF
53#cmakedefine HAVE_ASPRINTF
54#cmakedefine HAVE_VASPRINTF
Michal Vaskod304a082021-05-19 16:36:10 +020055#cmakedefine HAVE_GETLINE
Michal Vasko5aa44c02020-06-29 11:47:02 +020056#cmakedefine HAVE_STRNDUP
57#cmakedefine HAVE_STRNSTR
Michal Vaskod304a082021-05-19 16:36:10 +020058#cmakedefine HAVE_STRDUPA
59#cmakedefine HAVE_STRCHRNUL
Michal Vasko5aa44c02020-06-29 11:47:02 +020060#cmakedefine HAVE_GET_CURRENT_DIR_NAME
Michal Vaskod304a082021-05-19 16:36:10 +020061#cmakedefine HAVE_PTHREAD_MUTEX_TIMEDLOCK
Jan Kundrátaac59c22021-12-09 23:25:15 +010062#cmakedefine HAVE_TM_GMTOFF
63#cmakedefine HAVE_TIME_H_TIMEZONE
Jan Kundráta5b3b992021-12-10 16:13:57 +010064#cmakedefine HAVE_REALPATH
Michal Vasko5aa44c02020-06-29 11:47:02 +020065
Christian Hopps6f326212021-03-23 12:37:29 -040066#ifndef bswap64
Michal Vasko5aa44c02020-06-29 11:47:02 +020067#define bswap64(val) \
68 ( (((val) >> 56) & 0x00000000000000FF) | (((val) >> 40) & 0x000000000000FF00) | \
69 (((val) >> 24) & 0x0000000000FF0000) | (((val) >> 8) & 0x00000000FF000000) | \
70 (((val) << 8) & 0x000000FF00000000) | (((val) << 24) & 0x0000FF0000000000) | \
71 (((val) << 40) & 0x00FF000000000000) | (((val) << 56) & 0xFF00000000000000) )
Christian Hopps6f326212021-03-23 12:37:29 -040072#endif
Michal Vasko5aa44c02020-06-29 11:47:02 +020073
74#undef le64toh
75#undef htole64
76
77#cmakedefine IS_BIG_ENDIAN
78
79#ifdef IS_BIG_ENDIAN
80# define le64toh(x) bswap64(x)
81# define htole64(x) bswap64(x)
82#else
83# define le64toh(x) (x)
84# define htole64(x) (x)
85#endif
86
Michal Vaskod304a082021-05-19 16:36:10 +020087#cmakedefine HAVE_STDATOMIC
88
89#ifdef HAVE_STDATOMIC
90# include <stdatomic.h>
91
92# define ATOMIC_T atomic_uint_fast32_t
93# define ATOMIC_T_MAX UINT_FAST32_MAX
94
95# define ATOMIC_STORE_RELAXED(var, x) atomic_store_explicit(&(var), x, memory_order_relaxed)
96# define ATOMIC_LOAD_RELAXED(var) atomic_load_explicit(&(var), memory_order_relaxed)
97# define ATOMIC_INC_RELAXED(var) atomic_fetch_add_explicit(&(var), 1, memory_order_relaxed)
98# define ATOMIC_ADD_RELAXED(var, x) atomic_fetch_add_explicit(&(var), x, memory_order_relaxed)
99# define ATOMIC_DEC_RELAXED(var) atomic_fetch_sub_explicit(&(var), 1, memory_order_relaxed)
100# define ATOMIC_SUB_RELAXED(var, x) atomic_fetch_sub_explicit(&(var), x, memory_order_relaxed)
101#else
102# include <stdint.h>
103
104# define ATOMIC_T uint32_t
105# define ATOMIC_T_MAX UINT32_MAX
106
107# define ATOMIC_STORE_RELAXED(var, x) ((var) = (x))
108# define ATOMIC_LOAD_RELAXED(var) (var)
109# define ATOMIC_INC_RELAXED(var) __sync_fetch_and_add(&(var), 1)
110# define ATOMIC_ADD_RELAXED(var, x) __sync_fetch_and_add(&(var), x)
111# define ATOMIC_DEC_RELAXED(var) __sync_fetch_and_sub(&(var), 1)
112# define ATOMIC_SUB_RELAXED(var, x) __sync_fetch_and_sub(&(var), x)
113#endif
114
Michal Vasko5aa44c02020-06-29 11:47:02 +0200115#ifndef HAVE_VDPRINTF
116int vdprintf(int fd, const char *format, va_list ap);
117#endif
118
119#ifndef HAVE_ASPRINTF
120int asprintf(char **strp, const char *fmt, ...);
121#endif
122
123#ifndef HAVE_VASPRINTF
124int vasprintf(char **strp, const char *fmt, va_list ap);
125#endif
126
Michal Vaskod304a082021-05-19 16:36:10 +0200127#ifndef HAVE_GETLINE
128ssize_t getline(char **lineptr, size_t *n, FILE *stream);
129#endif
130
Michal Vasko5aa44c02020-06-29 11:47:02 +0200131#ifndef HAVE_STRNDUP
132char *strndup(const char *s, size_t n);
133#endif
134
135#ifndef HAVE_STRNSTR
136char *strnstr(const char *s, const char *find, size_t slen);
137#endif
138
Michal Vaskod304a082021-05-19 16:36:10 +0200139#ifndef HAVE_STRDUPA
140#define strdupa(s) ( \
141{ \
142 char *buf; \
143 size_t len = strlen(s); \
144 buf = alloca(len + 1); \
145 buf[len] = '\0'; \
146 (char *)memcpy(buf, s, len); \
147})
148#endif
149
150#ifndef HAVE_STRCHRNUL
151char *strchrnul(const char *s, int c);
Michal Vasko5aa44c02020-06-29 11:47:02 +0200152#endif
153
154#ifndef HAVE_GET_CURRENT_DIR_NAME
155char *get_current_dir_name(void);
156#endif
157
Michal Vaskod304a082021-05-19 16:36:10 +0200158#ifndef HAVE_PTHREAD_MUTEX_TIMEDLOCK
159int pthread_mutex_timedlock(pthread_mutex_t *mutex, const struct timespec *abstime);
160#endif
161
Jan Kundráta5b3b992021-12-10 16:13:57 +0100162#ifndef HAVE_REALPATH
163char *realpath(const char *path, char *resolved_path);
164#endif
165
Michal Vasko5aa44c02020-06-29 11:47:02 +0200166#endif /* _COMPAT_H_ */