port: Silence macro redefinition warnings on FreeBSD

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

diff --git a/include/lttng/align.h b/include/lttng/align.h
index f2163e08d56c74918e026347ef43e3054c3c05cb..8f227eb9ecb49b04cd4d48f1ef763c4a8d6acabb 100644 (file)
--- a/include/lttng/align.h
+++ b/include/lttng/align.h
@@ -15,6 +15,14 @@
  *
  * 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>
@@ -25,9 +33,13 @@
 #define PAGE_SIZE              sysconf(_SC_PAGE_SIZE)
 #endif
 
+#ifndef PAGE_MASK      /* FreeBSD and macOS defines their own PAGE_MASK. */
 #define PAGE_MASK              (~(PAGE_SIZE - 1))
+#endif
 #define __ALIGN_MASK(v, mask)  (((v) + (mask)) & ~(mask))
-#define ALIGN(v, align)                __ALIGN_MASK(v, (typeof(v)) (align) - 1)
+#ifndef ALIGN          /* FreeBSD and macOS defines their own ALIGN. */
+#define ALIGN(v, align)                __ALIGN_MASK(v, (__typeof__(v)) (align) - 1)
+#endif
 #define PAGE_ALIGN(addr)       ALIGN(addr, PAGE_SIZE)
 
 /**
@@ -58,7 +70,7 @@
        ({                                                                     \
                LTTNG_BUILD_RUNTIME_BUG_ON((alignment) == 0                    \
                                   || ((alignment) & ((alignment) - 1)));      \
-               (((align_drift) - (alignment)) & ((alignment) - 1);            \
+               (((align_drift) - (alignment)) & ((alignment) - 1));           \
        })
 
 #endif /* _UST_ALIGN_H */