You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
systemd/SOURCES/0733-hash-funcs-introduce-m...

38 lines
1.6 KiB

From cfa7b3d0a1900b725e5489dfec2c39abb8569c29 Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Wed, 28 Nov 2018 14:10:04 +0900
Subject: [PATCH] hash-funcs: introduce macro to create typesafe hash_ops
(cherry picked from commit d1005d1c0050d3dc3a24c054bac4c4916073cbba)
Resolves: #2037807
---
src/basic/hash-funcs.h | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/src/basic/hash-funcs.h b/src/basic/hash-funcs.h
index 5e5989f021..2ff687e5f9 100644
--- a/src/basic/hash-funcs.h
+++ b/src/basic/hash-funcs.h
@@ -13,6 +13,20 @@ struct hash_ops {
compare_func_t compare;
};
+#define _DEFINE_HASH_OPS(uq, name, type, hash_func, compare_func, scope) \
+ _unused_ static void (* UNIQ_T(static_hash_wrapper, uq))(const type *, struct siphash *) = hash_func; \
+ _unused_ static int (* UNIQ_T(static_compare_wrapper, uq))(const type *, const type *) = compare_func; \
+ scope const struct hash_ops name = { \
+ .hash = (hash_func_t) hash_func, \
+ .compare = (compare_func_t) compare_func, \
+ }
+
+#define DEFINE_HASH_OPS(name, type, hash_func, compare_func) \
+ _DEFINE_HASH_OPS(UNIQ, name, type, hash_func, compare_func,)
+
+#define DEFINE_PRIVATE_HASH_OPS(name, type, hash_func, compare_func) \
+ _DEFINE_HASH_OPS(UNIQ, name, type, hash_func, compare_func, static)
+
void string_hash_func(const void *p, struct siphash *state);
int string_compare_func(const void *a, const void *b) _pure_;
extern const struct hash_ops string_hash_ops;