commit 3f567f529f88a7430278b9a2135abb70af109bde Author: Sebastian Hahn sebastian@torproject.org Date: Thu Feb 13 08:25:08 2014 +0100
gcc/clang: Mark macro-generated functions as possible unused
clang 3.4 introduced a new by-default warning about unused static functions, which we triggered heavily for the hashtable and map function generating macros. We can use __attribute__ ((unused)) (thanks nickm for the suggestion :-) ) to silence these warnings. --- src/common/compat.h | 2 ++ src/common/container.h | 46 ++++++++++++++++++++++++++++------------------ src/ext/ht.h | 16 ++++++++-------- 3 files changed, 38 insertions(+), 26 deletions(-)
diff --git a/src/common/compat.h b/src/common/compat.h index 8ab7190..51fb8c5 100644 --- a/src/common/compat.h +++ b/src/common/compat.h @@ -162,6 +162,7 @@ extern INLINE double U64_TO_DBL(uint64_t x) { * * #define ATTR_NONNULL(x) __attribute__((nonnull x)) */ #define ATTR_NONNULL(x) +#define ATTR_UNUSED __attribute__ ((unused))
/** Macro: Evaluates to <b>exp</b> and hints the compiler that the value * of <b>exp</b> will probably be true. @@ -185,6 +186,7 @@ extern INLINE double U64_TO_DBL(uint64_t x) { #define ATTR_MALLOC #define ATTR_NORETURN #define ATTR_NONNULL(x) +#define ATTR_UNUSED #define PREDICT_LIKELY(exp) (exp) #define PREDICT_UNLIKELY(exp) (exp) #endif diff --git a/src/common/container.h b/src/common/container.h index 1a68b8f..fb93747 100644 --- a/src/common/container.h +++ b/src/common/container.h @@ -471,64 +471,74 @@ void* strmap_remove_lc(strmap_t *map, const char *key); #define DECLARE_TYPED_DIGESTMAP_FNS(prefix, maptype, valtype) \ typedef struct maptype maptype; \ typedef struct prefix##iter_t prefix##iter_t; \ - static INLINE maptype* prefix##new(void) \ + ATTR_UNUSED static INLINE maptype* \ + prefix##new(void) \ { \ return (maptype*)digestmap_new(); \ } \ - static INLINE digestmap_t* prefix##to_digestmap(maptype *map) \ + ATTR_UNUSED static INLINE digestmap_t* \ + prefix##to_digestmap(maptype *map) \ { \ return (digestmap_t*)map; \ } \ - static INLINE valtype* prefix##get(maptype *map, const char *key) \ + ATTR_UNUSED static INLINE valtype* \ + prefix##get(maptype *map, const char *key) \ { \ return (valtype*)digestmap_get((digestmap_t*)map, key); \ } \ - static INLINE valtype* prefix##set(maptype *map, const char *key, \ - valtype *val) \ + ATTR_UNUSED static INLINE valtype* \ + prefix##set(maptype *map, const char *key, valtype *val) \ { \ return (valtype*)digestmap_set((digestmap_t*)map, key, val); \ } \ - static INLINE valtype* prefix##remove(maptype *map, const char *key) \ + ATTR_UNUSED static INLINE valtype* \ + prefix##remove(maptype *map, const char *key) \ { \ return (valtype*)digestmap_remove((digestmap_t*)map, key); \ } \ - static INLINE void prefix##free(maptype *map, void (*free_val)(void*)) \ + ATTR_UNUSED static INLINE void \ + prefix##free(maptype *map, void (*free_val)(void*)) \ { \ digestmap_free((digestmap_t*)map, free_val); \ } \ - static INLINE int prefix##isempty(maptype *map) \ + ATTR_UNUSED static INLINE int \ + prefix##isempty(maptype *map) \ { \ return digestmap_isempty((digestmap_t*)map); \ } \ - static INLINE int prefix##size(maptype *map) \ + ATTR_UNUSED static INLINE int \ + prefix##size(maptype *map) \ { \ return digestmap_size((digestmap_t*)map); \ } \ - static INLINE prefix##iter_t *prefix##iter_init(maptype *map) \ + ATTR_UNUSED static INLINE \ + prefix##iter_t *prefix##iter_init(maptype *map) \ { \ return (prefix##iter_t*) digestmap_iter_init((digestmap_t*)map); \ } \ - static INLINE prefix##iter_t *prefix##iter_next(maptype *map, \ - prefix##iter_t *iter) \ + ATTR_UNUSED static INLINE \ + prefix##iter_t *prefix##iter_next(maptype *map, prefix##iter_t *iter) \ { \ return (prefix##iter_t*) digestmap_iter_next( \ (digestmap_t*)map, (digestmap_iter_t*)iter); \ } \ - static INLINE prefix##iter_t *prefix##iter_next_rmv(maptype *map, \ - prefix##iter_t *iter) \ + ATTR_UNUSED static INLINE prefix##iter_t* \ + prefix##iter_next_rmv(maptype *map, prefix##iter_t *iter) \ { \ return (prefix##iter_t*) digestmap_iter_next_rmv( \ (digestmap_t*)map, (digestmap_iter_t*)iter); \ } \ - static INLINE void prefix##iter_get(prefix##iter_t *iter, \ - const char **keyp, \ - valtype **valp) \ + ATTR_UNUSED static INLINE void \ + prefix##iter_get(prefix##iter_t *iter, \ + const char **keyp, \ + valtype **valp) \ { \ void *v; \ digestmap_iter_get((digestmap_iter_t*) iter, keyp, &v); \ *valp = v; \ } \ - static INLINE int prefix##iter_done(prefix##iter_t *iter) \ + ATTR_UNUSED static INLINE int \ + prefix##iter_done(prefix##iter_t *iter) \ { \ return digestmap_iter_done((digestmap_iter_t*)iter); \ } diff --git a/src/ext/ht.h b/src/ext/ht.h index 669a2ed..62c458a 100644 --- a/src/ext/ht.h +++ b/src/ext/ht.h @@ -168,7 +168,7 @@ ht_string_hash(const char *s) } \ /* Insert the element 'elm' into the table 'head'. Do not call this \ * function if the table might already contain a matching element. */ \ - static INLINE void \ + ATTR_UNUSED static INLINE void \ name##_HT_INSERT(struct name *head, struct type *elm) \ { \ struct type **p; \ @@ -183,7 +183,7 @@ ht_string_hash(const char *s) /* Insert the element 'elm' into the table 'head'. If there already \ * a matching element in the table, replace that element and return \ * it. */ \ - static INLINE struct type * \ + ATTR_UNUSED static INLINE struct type * \ name##_HT_REPLACE(struct name *head, struct type *elm) \ { \ struct type **p, *r; \ @@ -204,7 +204,7 @@ ht_string_hash(const char *s) } \ /* Remove any element matching 'elm' from the table 'head'. If such \ * an element is found, return it; otherwise return NULL. */ \ - static INLINE struct type * \ + ATTR_UNUSED static INLINE struct type * \ name##_HT_REMOVE(struct name *head, struct type *elm) \ { \ struct type **p, *r; \ @@ -222,11 +222,11 @@ ht_string_hash(const char *s) * using 'data' as its second argument. If the function returns \ * nonzero, remove the most recently examined element before invoking \ * the function again. */ \ - static INLINE void \ + ATTR_UNUSED static INLINE void \ name##_HT_FOREACH_FN(struct name *head, \ int (*fn)(struct type *, void *), \ void *data) \ - { \ +{ \ unsigned idx; \ struct type **p, **nextp, *next; \ if (!head->hth_table) \ @@ -248,7 +248,7 @@ ht_string_hash(const char *s) /* Return a pointer to the first element in the table 'head', under \ * an arbitrary order. This order is stable under remove operations, \ * but not under others. If the table is empty, return NULL. */ \ - static INLINE struct type ** \ + ATTR_UNUSED static INLINE struct type ** \ name##_HT_START(struct name *head) \ { \ unsigned b = 0; \ @@ -264,7 +264,7 @@ ht_string_hash(const char *s) * NULL. If 'elm' is to be removed from the table, you must call \ * this function for the next value before you remove it. \ */ \ - static INLINE struct type ** \ + ATTR_UNUSED static INLINE struct type ** \ name##_HT_NEXT(struct name *head, struct type **elm) \ { \ if ((*elm)->field.hte_next) { \ @@ -280,7 +280,7 @@ ht_string_hash(const char *s) return NULL; \ } \ } \ - static INLINE struct type ** \ + ATTR_UNUSED static INLINE struct type ** \ name##_HT_NEXT_RMV(struct name *head, struct type **elm) \ { \ unsigned h = HT_ELT_HASH_(*elm, field, hashfn); \