X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=include%2Fust%2Fcore.h;h=d0e2750f1fab74253c9f2bcd2c843ccf7943241c;hb=2699970af0f4b62631da85616cbaa2252ff45756;hp=27c7e6d4802717215792fe68cd4c3234ebaa0ad0;hpb=12e81b07455a1aef2e2bcc73004f14a7b73596fa;p=ust.git

diff --git a/include/ust/core.h b/include/ust/core.h
index 27c7e6d..d0e2750 100644
--- a/include/ust/core.h
+++ b/include/ust/core.h
@@ -1,7 +1,30 @@
+/* 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
+ */
+
 #ifndef UST_CORE_H
 #define UST_CORE_H
 
-#if defined(CONFIG_LTT) && defined(CONFIG_LTT_ALIGNMENT)
+#include <sys/types.h>
+#include <ust/config.h>
+
+#define likely(x)	__builtin_expect(!!(x), 1)
+#define unlikely(x)	__builtin_expect(!!(x), 0)
+
+#ifndef HAVE_EFFICIENT_UNALIGNED_ACCESS
 
 /*
  * Calculate the offset needed to align the type.
@@ -20,7 +43,7 @@ static inline int ltt_get_alignment(void)
 	return sizeof(void *);
 }
 
-#else
+#else /* HAVE_EFFICIENT_UNALIGNED_ACCESS */
 
 static inline unsigned int ltt_align(size_t align_drift,
 		 size_t size_of_type)
@@ -34,6 +57,93 @@ static inline int ltt_get_alignment(void)
 {
 	return 0;
 }
-#endif /* defined(CONFIG_LTT) && defined(CONFIG_LTT_ALIGNMENT) */
+#endif /* HAVE_EFFICIENT_UNALIGNED_ACCESS */
+
+
+/* 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 */
+
+#define zmalloc(s) calloc(1, s)
+
+/* MATH */
+
+#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) );})
 
 #endif /* UST_CORE_H */