X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;f=include%2Flttng%2Falign.h;h=3f43a3b4d8beb5a02e0c908e9a969ea8f26fabbd;hb=b72687b85f4f07a9b63be329ad1fe95b36d24900;hp=9154051e33e59363cf24ee77a065dd675ab976b6;hpb=9501d22f55b3a23f382f631c99b2325d1419b5da;p=lttng-ust.git

diff --git a/include/lttng/align.h b/include/lttng/align.h
index 9154051e..3f43a3b4 100644
--- a/include/lttng/align.h
+++ b/include/lttng/align.h
@@ -15,27 +15,48 @@
  *
  * 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>
+
+#ifdef __FreeBSD__
+#include <machine/param.h>
+#endif
+
+#ifdef _SC_PAGE_SIZE
+#define LTTNG_UST_PAGE_SIZE	sysconf(_SC_PAGE_SIZE)
+#elif defined(PAGE_SIZE)
+#define LTTNG_UST_PAGE_SIZE	PAGE_SIZE
+#else
+#error "Please add page size detection for your OS."
+#endif
+
+#define LTTNG_UST_PAGE_MASK	(~(LTTNG_UST_PAGE_SIZE - 1))
 
-#define PAGE_SIZE		sysconf(_SC_PAGE_SIZE)
-#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)
+#define __LTTNG_UST_ALIGN_MASK(v, mask)	(((v) + (mask)) & ~(mask))
+#define LTTNG_UST_ALIGN(v, align)	__LTTNG_UST_ALIGN_MASK(v, (__typeof__(v)) (align) - 1)
+#define LTTNG_UST_PAGE_ALIGN(addr)	LTTNG_UST_ALIGN(addr, LTTNG_UST_PAGE_SIZE)
 
 /**
- * offset_align - Calculate the offset needed to align an object on its natural
- *                alignment towards higher addresses.
+ * lttng_ust_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.
  *
  * Returns the offset that must be added to align towards higher
  * addresses.
  */
-#define offset_align(align_drift, alignment)				       \
+#define lttng_ust_offset_align(align_drift, alignment)			       \
 	({								       \
 		LTTNG_BUILD_RUNTIME_BUG_ON((alignment) == 0		       \
 				   || ((alignment) & ((alignment) - 1)));      \
@@ -43,18 +64,50 @@
 	})
 
 /**
- * offset_align_floor - Calculate the offset needed to align an object
- *                      on its natural alignment towards lower addresses.
+ * lttng_ust_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_ust_offset_align_floor(align_drift, alignment)		       \
 	({								       \
 		LTTNG_BUILD_RUNTIME_BUG_ON((alignment) == 0		       \
 				   || ((alignment) & ((alignment) - 1)));      \
-		(((align_drift) - (alignment)) & ((alignment) - 1);	       \
+		(((align_drift) - (alignment)) & ((alignment) - 1));	       \
 	})
 
+/*
+ * Non-namespaced defines for backwards compatibility,
+ * introduced in 2.13, should be removed in the future.
+ */
+
+/* Cygwin limits.h defines its own PAGE_SIZE */
+#ifndef PAGE_SIZE
+#define PAGE_SIZE	LTTNG_UST_PAGE_SIZE
+#endif
+
+/* FreeBSD and macOS defines their own PAGE_MASK. */
+#ifndef PAGE_MASK
+#define PAGE_MASK	LTTNG_UST_PAGE_MASK
+#endif
+
+/* FreeBSD machine/param.h defines its own ALIGN */
+#ifndef ALIGN
+#define ALIGN		LTTNG_UST_ALIGN
+#endif
+
+#ifndef PAGE_ALIGN
+#define PAGE_ALIGN	LTTNG_UST_PAGE_ALIGN
+#endif
+
+#ifndef offset_align
+#define offset_align lttng_ust_offset_align
+#endif
+
+#ifndef offset_align_floor
+#define offset_align_floor lttng_ust_offset_align_floor
+#endif
+
 #endif /* _UST_ALIGN_H */