6 /** \file rpmio/rpmutil.h
8 * Miscellaneous utility macros:
9 * - portability wrappers for various gcc extensions like __attribute__()
12 * Copied from glib, names replaced to avoid clashing with glib.
16 /* Here we provide RPM_GNUC_EXTENSION as an alias for __extension__,
17 * where this is valid. This allows for warningless compilation of
18 * "long long" types even in the presence of '-ansi -pedantic'.
20 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 8)
21 # define RPM_GNUC_EXTENSION __extension__
23 # define RPM_GNUC_EXTENSION
26 /* Provide macros to feature the GCC function attribute.
28 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
29 #define RPM_GNUC_PURE \
30 __attribute__((__pure__))
31 #define RPM_GNUC_MALLOC \
32 __attribute__((__malloc__))
35 #define RPM_GNUC_MALLOC
38 #if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
39 #define RPM_GNUC_ALLOC_SIZE(x) __attribute__((__alloc_size__(x)))
40 #define RPM_GNUC_ALLOC_SIZE2(x,y) __attribute__((__alloc_size__(x,y)))
42 #define RPM_GNUC_ALLOC_SIZE(x)
43 #define RPM_GNUC_ALLOC_SIZE2(x,y)
47 #define RPM_GNUC_NULL_TERMINATED __attribute__((__sentinel__))
49 #define RPM_GNUC_NULL_TERMINATED
52 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ > 4)
53 #define RPM_GNUC_PRINTF( format_idx, arg_idx ) \
54 __attribute__((__format__ (__printf__, format_idx, arg_idx)))
55 #define RPM_GNUC_SCANF( format_idx, arg_idx ) \
56 __attribute__((__format__ (__scanf__, format_idx, arg_idx)))
57 #define RPM_GNUC_FORMAT( arg_idx ) \
58 __attribute__((__format_arg__ (arg_idx)))
59 #define RPM_GNUC_NORETURN \
60 __attribute__((__noreturn__))
61 #define RPM_GNUC_CONST \
62 __attribute__((__const__))
63 #define RPM_GNUC_UNUSED \
64 __attribute__((__unused__))
65 #define RPM_GNUC_NO_INSTRUMENT \
66 __attribute__((__no_instrument_function__))
68 #define RPM_GNUC_PRINTF( format_idx, arg_idx )
69 #define RPM_GNUC_SCANF( format_idx, arg_idx )
70 #define RPM_GNUC_FORMAT( arg_idx )
71 #define RPM_GNUC_NORETURN
72 #define RPM_GNUC_CONST
73 #define RPM_GNUC_UNUSED
74 #define RPM_GNUC_NO_INSTRUMENT
75 #endif /* !__GNUC__ */
77 #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1)
78 #define RPM_GNUC_DEPRECATED \
79 __attribute__((__deprecated__))
81 #define RPM_GNUC_DEPRECATED
84 #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3)
85 #define RPM_GNUC_MAY_ALIAS __attribute__((may_alias))
86 #define RPM_GNUC_NONNULL( ... ) \
87 __attribute__((__nonnull__ (__VA_ARGS__)))
89 #define RPM_GNUC_MAY_ALIAS
90 #define RPM_GNUC_NONNULL( ... )
93 #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
94 #define RPM_GNUC_WARN_UNUSED_RESULT \
95 __attribute__((warn_unused_result))
97 #define RPM_GNUC_WARN_UNUSED_RESULT
100 #if __GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3)
101 # define RPM_GNUC_INTERNAL __attribute__((visibility("hidden")))
103 # define RPM_GNUC_INTERNAL
107 /* Guard C code in headers, while including them from C++ */
109 # define RPM_BEGIN_DECLS extern "C" {
110 # define RPM_END_DECLS }
112 # define RPM_BEGIN_DECLS
113 # define RPM_END_DECLS
120 /* Rpm specific allocators which never return NULL but terminate on failure */
121 RPM_GNUC_MALLOC RPM_GNUC_ALLOC_SIZE(1)
122 void * rmalloc(size_t size);
124 RPM_GNUC_MALLOC RPM_GNUC_ALLOC_SIZE2(1,2)
125 void * rcalloc(size_t nmemb, size_t size);
127 RPM_GNUC_ALLOC_SIZE(2)
128 void * rrealloc(void *ptr, size_t size);
130 char * rstrdup(const char *str);
132 /* Rpm specific free() which returns NULL */
133 void * rfree(void *ptr);
136 * Memory allocation failure callback prototype. When registered through
137 * rpmSetMemFail(), this gets called if memory allocation through rmalloc()
138 * and friends fails. If the application can somehow recover memory here,
139 * it can return a newly allocated memory block of requested size, otherwise
140 * it must return NULL after performing it's own shutdown deeds or
142 * @param size Size of allocation request in bytes
143 * @param data User data (or NULL)
144 * @return Allocated memory block of requested size or NULL
146 typedef void * (*rpmMemFailFunc) (size_t size, void *data);
149 * Set memory allocation failure callback.
150 * @param func Allocation failure callback function
151 * @param data User data (or NULL)
152 * @return Previous callback function
154 rpmMemFailFunc rpmSetMemFail(rpmMemFailFunc func, void *data);
160 #endif /* _RPMUTIL_H */