X-Git-Url: http://mj.ucw.cz/gitweb/?a=blobdiff_plain;f=ucw%2Flib.h;h=e7518defa3d64a30cbcdfe9b39e9a3cbfc1fa21a;hb=0204a4ff10292047628c754b0d088a742b511bb3;hp=f1ea7e9dc4fdb44f11d10a0297e1fb04013c9050;hpb=46a15649d1e544dce95f76424a4870d69caa955c;p=libucw.git

diff --git a/ucw/lib.h b/ucw/lib.h
index f1ea7e9d..e7518def 100644
--- a/ucw/lib.h
+++ b/ucw/lib.h
@@ -59,6 +59,7 @@
 #define NONRET __attribute__((noreturn))				/** Function does not return **/
 #define UNUSED __attribute__((unused))					/** Variable/parameter is knowingly unused **/
 #define CONSTRUCTOR __attribute__((constructor))			/** Call function upon start of program **/
+#define CONSTRUCTOR_WITH_PRIORITY(p) __attribute__((constructor(p)))	/** Define constructor with a given priority **/
 #define PACKED __attribute__((packed))					/** Structure should be packed **/
 #define CONST __attribute__((const))					/** Function depends only on arguments **/
 #define PURE __attribute__((pure))					/** Function depends only on arguments and global vars **/
@@ -149,6 +150,20 @@ void assert_failed_noinfo(void) NONRET;
 #define DBG(x,y...) do { } while(0)
 #endif
 
+#ifdef DEBUG_ASSERTS
+/**
+ * Sometimes, we may want to check that a pointer points to a valid memory
+ * location before we start using it for anything more complicated. This
+ * macro checks pointer validity by reading the byte it points to.
+ **/
+#define ASSERT_READABLE(ptr) ({ volatile char *__p = (ptr); *__p; })
+/** Like the previous macro, but it checks writeability, too. **/
+#define ASSERT_WRITEABLE(ptr) ({ volatile char *__p = (ptr); *__p = *__p; })
+#else
+#define ASSERT_READABLE(ptr) do { } while(0)
+#define ASSERT_WRITEABLE(ptr) do { } while(0)
+#endif
+
 /*** === Memory allocation ***/
 
 /*