Cleanup: namespace 'align' macros

[lttng-tools.git] / src / common / align.h

diff --git a/src/common/align.h b/src/common/align.h
index 81b92f86193d0501286212b3cd9211b13c14bc7b..024faf7fb5d9e32b6a39114d484e42c27d1ee9e4 100644 (file)
--- a/src/common/align.h
+++ b/src/common/align.h
@@ -16,26 +16,27 @@
 #define PAGE_SIZE              sysconf(_SC_PAGE_SIZE)
 #endif
 
-#ifndef PAGE_MASK      /* macOS defines its own PAGE_MASK. */
-#define PAGE_MASK              (~(PAGE_SIZE - 1))
-#endif
-
-#define __ALIGN_MASK(v, mask)  (((v) + (mask)) & ~(mask))
 
-#ifndef ALIGN          /* macOS defines its own ALIGN. */
-#define ALIGN(v, align)                __ALIGN_MASK(v, (__typeof__(v)) (align) - 1)
-#endif
+/*
+ * Align value to the next multiple of align. Returns val if it already is a
+ * multiple of align. Align must be a power of two.
+ */
+#define __lttng_align_ceil_mask(v, mask)       (((v) + (mask)) & ~(mask))
 
-#define __ALIGN_FLOOR_MASK(v, mask)    ((v) & ~(mask))
+#define lttng_align_ceil(v, align) \
+       __lttng_align_ceil_mask(v, (__typeof__(v)) (align) - 1)
 
-#ifndef ALIGN_FLOOR
-#define ALIGN_FLOOR(v, align)  __ALIGN_FLOOR_MASK(v, (__typeof__(v)) (align) - 1)
-#endif
+/*
+ * Align value to the previous multiple of align. Returns val if it already is a
+ * multiple of align. Align must be a power of two.
+ */
+#define __lttng_align_floor_mask(v, mask)      ((v) & ~(mask))
 
-#define PAGE_ALIGN(addr)       ALIGN(addr, PAGE_SIZE)
+#define lttng_align_floor(v, align) \
+       __lttng_align_floor_mask(v, (__typeof__(v)) (align) - 1)
 
 /**
- * offset_align - Calculate the offset needed to align an object on its natural
+ * lttng_offset_align - Calculate the offset needed to align an object on its natural
  *                alignment towards higher addresses.
  * @align_drift:  object offset from an "alignment"-aligned address.
  * @alignment:    natural object alignment. Must be non-zero, power of 2.
@@ -43,7 +44,7 @@
  * Returns the offset that must be added to align towards higher
  * addresses.
  */
-#define offset_align(align_drift, alignment)                                  \
+#define lttng_offset_align(align_drift, alignment)                                    \
        ({                                                                     \
                LTTNG_BUILD_RUNTIME_BUG_ON((alignment) == 0                    \
                                   || ((alignment) & ((alignment) - 1)));      \
@@ -51,14 +52,14 @@
        })
 
 /**
- * offset_align_floor - Calculate the offset needed to align an object
+ * lttng_offset_align_floor - Calculate the offset needed to align an object
  *                      on its natural alignment towards lower addresses.
  * @align_drift:  object offset from an "alignment"-aligned address.
  * @alignment:    natural object alignment. Must be non-zero, power of 2.
  *
  * Returns the offset that must be substracted to align towards lower addresses.
  */
-#define offset_align_floor(align_drift, alignment)                            \
+#define lttng_offset_align_floor(align_drift, alignment)                              \
        ({                                                                     \
                LTTNG_BUILD_RUNTIME_BUG_ON((alignment) == 0                    \
                                   || ((alignment) & ((alignment) - 1)));      \