#ifndef UST_CORE_H
#define UST_CORE_H
-#if defined(CONFIG_LTT) && defined(CONFIG_LTT_ALIGNMENT)
-
/*
- * Calculate the offset needed to align the type.
- * size_of_type must be non-zero.
+ * Copyright (C) 2010 Pierre-Marc Fournier
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-static inline unsigned int ltt_align(size_t align_drift, size_t size_of_type)
+
+#include <sys/types.h>
+#include <ust/config.h>
+#include <urcu/arch.h>
+
+#define likely(x) __builtin_expect(!!(x), 1)
+#define unlikely(x) __builtin_expect(!!(x), 0)
+
+/* ARRAYS */
+
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+
+
+/* ALIGNMENT SHORTCUTS */
+
+#include <unistd.h>
+
+#define ALIGN(x,a) __ALIGN_MASK(x,(typeof(x))(a)-1)
+#define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask))
+#define PAGE_ALIGN(addr) ALIGN(addr, PAGE_SIZE)
+#define PAGE_SIZE sysconf(_SC_PAGE_SIZE)
+#define PAGE_MASK (~(PAGE_SIZE-1))
+
+/* ERROR OPS */
+#define MAX_ERRNO 4095
+
+#define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO)
+
+static inline void *ERR_PTR(long error)
+{
+ return (void *) error;
+}
+
+static inline long PTR_ERR(const void *ptr)
+{
+ return (long) ptr;
+}
+
+static inline long IS_ERR(const void *ptr)
+{
+ return IS_ERR_VALUE((unsigned long)ptr);
+}
+
+
+/* Min / Max */
+
+#define min_t(type, x, y) ({ \
+ type __min1 = (x); \
+ type __min2 = (y); \
+ __min1 < __min2 ? __min1: __min2; })
+
+#define max_t(type, x, y) ({ \
+ type __max1 = (x); \
+ type __max2 = (y); \
+ __max1 > __max2 ? __max1: __max2; })
+
+
+/* MUTEXES */
+
+#include <pthread.h>
+
+#define DEFINE_MUTEX(m) pthread_mutex_t (m) = PTHREAD_MUTEX_INITIALIZER;
+#define DECLARE_MUTEX(m) extern pthread_mutex_t (m);
+
+/* MALLOCATION */
+
+#include <stdlib.h>
+
+static inline
+void *zmalloc(size_t len)
+{
+ return calloc(1, len);
+}
+
+static inline
+void *malloc_align(size_t len)
{
- size_t alignment = min(sizeof(void *), size_of_type);
- return (alignment - align_drift) & (alignment - 1);
+ return malloc(ALIGN(len, CAA_CACHE_LINE_SIZE));
}
-/* Default arch alignment */
-#define LTT_ALIGN
-static inline int ltt_get_alignment(void)
+static inline
+void *zmalloc_align(size_t len)
{
- return sizeof(void *);
+ return calloc(1, ALIGN(len, CAA_CACHE_LINE_SIZE));
}
-#else
+/* MATH */
-static inline unsigned int ltt_align(size_t align_drift,
- size_t size_of_type)
+#include <ust/processor.h>
+static inline unsigned int hweight32(unsigned int w)
{
+ unsigned int res = w - ((w >> 1) & 0x55555555);
+ res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
+ res = (res + (res >> 4)) & 0x0F0F0F0F;
+ res = res + (res >> 8);
+ return (res + (res >> 16)) & 0x000000FF;
+}
+
+static __inline__ int get_count_order(unsigned int count)
+{
+ int order;
+
+ order = fls(count) - 1;
+ if (count & (count - 1))
+ order++;
+ return order;
+}
+
+#define _ust_container_of(ptr, type, member) ({ \
+ const typeof( ((type *)0)->member ) *__mptr = (ptr); \
+ (type *)( (char *)__mptr - offsetof(type,member) );})
+
+#ifndef inline_memcpy
+#define inline_memcpy memcpy
+#endif
+
+#ifndef __same_type
+#define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b))
+#endif
+
+#ifndef UST_VALGRIND
+
+static __inline__ int ust_get_cpu(void)
+{
+ int cpu;
+
+ cpu = sched_getcpu();
+ if (likely(cpu >= 0))
+ return cpu;
+ /*
+ * If getcpu(2) is not implemented in the Kernel use CPU 0 as fallback.
+ */
return 0;
}
-#define LTT_ALIGN __attribute__((packed))
+#else /* #else #ifndef UST_VALGRIND */
-static inline int ltt_get_alignment(void)
+static __inline__ int ust_get_cpu(void)
{
+ /*
+ * Valgrind does not support the sched_getcpu() vsyscall.
+ * It causes it to detect a segfault in the program and stop it.
+ * So if we want to check libust with valgrind, we have to refrain
+ * from using this call. TODO: it would probably be better to return
+ * other values too, to better test it.
+ */
return 0;
}
-#endif /* defined(CONFIG_LTT) && defined(CONFIG_LTT_ALIGNMENT) */
+
+#endif /* #else #ifndef UST_VALGRIND */
#endif /* UST_CORE_H */
projects / lttng-ust.git / blobdiff