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6 * modification, are permitted provided that the following conditions
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9 * notice, this list of conditions and the following disclaimer.
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12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
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18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 #include <sys/cdefs.h>
42 * Modes and flags for dlopen().
44 #define RTLD_LAZY 1 /* Bind function calls lazily. */
45 #define RTLD_NOW 2 /* Bind function calls immediately. */
46 #define RTLD_MODEMASK 0x3
47 #define RTLD_GLOBAL 0x100 /* Make symbols globally available. */
48 #define RTLD_LOCAL 0 /* Opposite of RTLD_GLOBAL, and the default. */
49 #define RTLD_TRACE 0x200 /* Trace loaded objects and exit. */
52 * Special handle arguments for dlsym().
54 #define RTLD_NEXT ((void *) -1) /* Search subsequent objects. */
55 #define RTLD_DEFAULT ((void *) -2) /* Use default search algorithm. */
58 * Structure filled in by dladdr().
60 typedef struct dl_info {
61 const char *dli_fname; /* Pathname of shared object. */
62 void *dli_fbase; /* Base address of shared object. */
63 const char *dli_sname; /* Name of nearest symbol. */
64 void *dli_saddr; /* Address of nearest symbol. */
68 * The actual type declared by this typedef is immaterial, provided that
69 * it is a function pointer. Its purpose is to provide a return type for
70 * dlfunc() which can be cast to a function pointer type without depending
71 * on behavior undefined by the C standard, which might trigger a compiler
72 * diagnostic. We intentionally declare a unique type signature to force
73 * a diagnostic should the application not cast the return value of dlfunc()
80 typedef void (*dlfunc_t)(struct __dlfunc_arg);
83 /* XSI functions first. */
87 void *dlopen(const char *, int);
88 void *dlsym(void * /* __restrict */, const char * /* __restrict */);
91 int dladdr(const void *, Dl_info *);
92 dlfunc_t dlfunc(void * /* __restrict */, const char * /* __restrict */);
93 void dllockinit(void *_context,
94 void *(*_lock_create)(void *_context),
95 void (*_rlock_acquire)(void *_lock),
96 void (*_wlock_acquire)(void *_lock),
97 void (*_lock_release)(void *_lock),
98 void (*_lock_destroy)(void *_lock),
99 void (*_context_destroy)(void *_context));
100 #endif /* __BSD_VISIBLE */
103 #endif /* !_DLFCN_H_ */