Fix: missing parenthesis in offset_align_floor

[lttng-ust.git] / include / lttng / align.h

diff --git a/include/lttng/align.h b/include/lttng/align.h
index 12fc61b9070f90322370ccb23c641cdfd9d15e51..ebf03e8dbb0c61a7f724f115e5144b3a7243fb58 100644 (file)
--- a/include/lttng/align.h
+++ b/include/lttng/align.h
@@ -6,16 +6,37 @@
  *
  * (C) Copyright 2010-2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  *
- * Dual LGPL v2.1/GPL v2 license.
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
  */
 
 #include <lttng/bug.h>
+#include <unistd.h>
+#include <limits.h>
 
-/*
- * Align pointer on natural object alignment.
- */
-#define object_align(obj)      PTR_ALIGN(obj, __alignof__(*(obj)))
-#define object_align_floor(obj)        PTR_ALIGN_FLOOR(obj, __alignof__(*(obj)))
+#ifndef PAGE_SIZE      /* Cygwin limits.h defines its own PAGE_SIZE */
+#define PAGE_SIZE              sysconf(_SC_PAGE_SIZE)
+#endif
+
+#define PAGE_MASK              (~(PAGE_SIZE - 1))
+#define __ALIGN_MASK(v, mask)  (((v) + (mask)) & ~(mask))
+#define ALIGN(v, align)                __ALIGN_MASK(v, (__typeof__(v)) (align) - 1)
+#define PAGE_ALIGN(addr)       ALIGN(addr, PAGE_SIZE)
 
 /**
  * offset_align - Calculate the offset needed to align an object on its natural
@@ -28,7 +49,7 @@
  */
 #define offset_align(align_drift, alignment)                                  \
        ({                                                                     \
-               BUILD_RUNTIME_BUG_ON((alignment) == 0                          \
+               LTTNG_BUILD_RUNTIME_BUG_ON((alignment) == 0                    \
                                   || ((alignment) & ((alignment) - 1)));      \
                (((alignment) - (align_drift)) & ((alignment) - 1));           \
        })
@@ -43,9 +64,9 @@
  */
 #define offset_align_floor(align_drift, alignment)                            \
        ({                                                                     \
-               BUILD_RUNTIME_BUG_ON((alignment) == 0                          \
+               LTTNG_BUILD_RUNTIME_BUG_ON((alignment) == 0                    \
                                   || ((alignment) & ((alignment) - 1)));      \
-               (((align_drift) - (alignment)) & ((alignment) - 1);            \
+               (((align_drift) - (alignment)) & ((alignment) - 1));           \
        })
 
 #endif /* _UST_ALIGN_H */