b9f5b9793887a27cb433444f26f8399f1ef60ca9
5 * Copyright (C) 2010 Pierre-Marc Fournier
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include <sys/types.h>
23 #include <ust/config.h>
24 #include <urcu/arch.h>
26 #define likely(x) __builtin_expect(!!(x), 1)
27 #define unlikely(x) __builtin_expect(!!(x), 0)
31 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
34 /* ALIGNMENT SHORTCUTS */
38 #define ALIGN(x,a) __ALIGN_MASK(x,(typeof(x))(a)-1)
39 #define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask))
40 #define PAGE_ALIGN(addr) ALIGN(addr, PAGE_SIZE)
41 #define PAGE_SIZE sysconf(_SC_PAGE_SIZE)
42 #define PAGE_MASK (~(PAGE_SIZE-1))
45 #define MAX_ERRNO 4095
47 #define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO)
49 static inline void *ERR_PTR(long error
)
51 return (void *) error
;
54 static inline long PTR_ERR(const void *ptr
)
59 static inline long IS_ERR(const void *ptr
)
61 return IS_ERR_VALUE((unsigned long)ptr
);
67 #define min_t(type, x, y) ({ \
70 __min1 < __min2 ? __min1: __min2; })
72 #define max_t(type, x, y) ({ \
75 __max1 > __max2 ? __max1: __max2; })
82 #define DEFINE_MUTEX(m) pthread_mutex_t (m) = PTHREAD_MUTEX_INITIALIZER;
83 #define DECLARE_MUTEX(m) extern pthread_mutex_t (m);
90 void *zmalloc(size_t len
)
92 return calloc(1, len
);
96 void *malloc_align(size_t len
)
98 return malloc(ALIGN(len
, CAA_CACHE_LINE_SIZE
));
102 void *zmalloc_align(size_t len
)
104 return calloc(1, ALIGN(len
, CAA_CACHE_LINE_SIZE
));
109 #include <ust/processor.h>
110 static inline unsigned int hweight32(unsigned int w
)
112 unsigned int res
= w
- ((w
>> 1) & 0x55555555);
113 res
= (res
& 0x33333333) + ((res
>> 2) & 0x33333333);
114 res
= (res
+ (res
>> 4)) & 0x0F0F0F0F;
115 res
= res
+ (res
>> 8);
116 return (res
+ (res
>> 16)) & 0x000000FF;
119 static __inline__
int get_count_order(unsigned int count
)
123 order
= fls(count
) - 1;
124 if (count
& (count
- 1))
129 #define _ust_container_of(ptr, type, member) ({ \
130 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
131 (type *)( (char *)__mptr - offsetof(type,member) );})
133 #ifndef inline_memcpy
134 #define inline_memcpy memcpy
138 #define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b))
143 static __inline__
int ust_get_cpu(void)
147 cpu
= sched_getcpu();
148 if (likely(cpu
>= 0))
151 * If getcpu(2) is not implemented in the Kernel use CPU 0 as fallback.
156 #else /* #else #ifndef UST_VALGRIND */
158 static __inline__
int ust_get_cpu(void)
161 * Valgrind does not support the sched_getcpu() vsyscall.
162 * It causes it to detect a segfault in the program and stop it.
163 * So if we want to check libust with valgrind, we have to refrain
164 * from using this call. TODO: it would probably be better to return
165 * other values too, to better test it.
170 #endif /* #else #ifndef UST_VALGRIND */
172 #endif /* UST_CORE_H */
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