hashmap: document trivial_hash_func()

[elogind.git] / src / shared / macro.h

diff --git a/src/shared/macro.h b/src/shared/macro.h
index 9bf81dc3cc541229bebe333d8d3ee31074ffe68b..0874102ece6afa10cdebd0031120532a3828b5c8 100644 (file)
--- a/src/shared/macro.h
+++ b/src/shared/macro.h
@@ -28,6 +28,7 @@
 #include <inttypes.h>
 
 #define _printf_attr_(a,b) __attribute__ ((format (printf, a, b)))
+#define _alloc_(...) __attribute__ ((alloc_size(__VA_ARGS__)))
 #define _sentinel_ __attribute__ ((sentinel))
 #define _noreturn_ __attribute__((noreturn))
 #define _unused_ __attribute__ ((unused))
@@ -264,6 +265,13 @@ do {                                                                    \
         }                                                               \
 } while(false)
 
+ /* Because statfs.t_type can be int on some architecures, we have to cast
+  * the const magic to the type, otherwise the compiler warns about
+  * signed/unsigned comparison, because the magic can be 32 bit unsigned.
+ */
+#define F_TYPE_CMP(a, b) (a == (typeof(a)) b)
+
+
 /* Returns the number of chars needed to format variables of the
  * specified type as a decimal string. Adds in extra space for a
  * negative '-' prefix. */