hashmap: document trivial_hash_func()

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

diff --git a/src/shared/macro.h b/src/shared/macro.h
index cca41a3f6ad7311877211d788a6d0d076285c909..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))
@@ -66,12 +67,16 @@
 #error "Wut? Pointers are neither 4 nor 8 bytes long?"
 #endif
 
+#define ALIGN_PTR(p) ((void*) ALIGN((unsigned long) p))
+#define ALIGN4_PTR(p) ((void*) ALIGN4((unsigned long) p))
 #define ALIGN8_PTR(p) ((void*) ALIGN8((unsigned long) p))
 
 static inline size_t ALIGN_TO(size_t l, size_t ali) {
         return ((l + ali - 1) & ~(ali - 1));
 }
 
+#define ALIGN_TO_PTR(p, ali) ((void*) ALIGN_TO((unsigned long) p))
+
 #define ELEMENTSOF(x) (sizeof(x)/sizeof((x)[0]))
 
 /*
@@ -260,6 +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. */