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netbsd.h

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00001 /*-------------------------------------------------------------------------
00002  *
00003  * netbsd.h
00004  *    port-specific prototypes for NetBSD
00005  *
00006  *
00007  * Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group
00008  * Portions Copyright (c) 1994, Regents of the University of California
00009  *
00010  * src/backend/port/dynloader/netbsd.h
00011  *
00012  *-------------------------------------------------------------------------
00013  */
00014 #ifndef PORT_PROTOS_H
00015 #define PORT_PROTOS_H
00016 
00017 #include <sys/types.h>
00018 #include <nlist.h>
00019 #include <link.h>
00020 #include <dlfcn.h>
00021 
00022 #include "utils/dynamic_loader.h"       /* pgrminclude ignore */
00023 
00024 /*
00025  * Dynamic Loader on NetBSD 1.0.
00026  *
00027  * this dynamic loader uses the system dynamic loading interface for shared
00028  * libraries (ie. dlopen/dlsym/dlclose). The user must specify a shared
00029  * library as the file to be dynamically loaded.
00030  *
00031  * agc - I know this is all a bit crufty, but it does work, is fairly
00032  * portable, and works (the stipulation that the d.l. function must
00033  * begin with an underscore is fairly tricky, and some versions of
00034  * NetBSD (like 1.0, and 1.0A pre June 1995) have no dlerror.)
00035  */
00036 
00037 /*
00038  * In some older systems, the RTLD_NOW flag isn't defined and the mode
00039  * argument to dlopen must always be 1.  The RTLD_GLOBAL flag is wanted
00040  * if available, but it doesn't exist everywhere.
00041  * If it doesn't exist, set it to 0 so it has no effect.
00042  */
00043 #ifndef RTLD_NOW
00044 #define RTLD_NOW 1
00045 #endif
00046 #ifndef RTLD_GLOBAL
00047 #define RTLD_GLOBAL 0
00048 #endif
00049 
00050 #define        pg_dlopen(f)    BSD44_derived_dlopen((f), RTLD_NOW | RTLD_GLOBAL)
00051 #define        pg_dlsym        BSD44_derived_dlsym
00052 #define        pg_dlclose      BSD44_derived_dlclose
00053 #define        pg_dlerror      BSD44_derived_dlerror
00054 
00055 char       *BSD44_derived_dlerror(void);
00056 void       *BSD44_derived_dlopen(const char *filename, int num);
00057 void       *BSD44_derived_dlsym(void *handle, const char *name);
00058 void        BSD44_derived_dlclose(void *handle);
00059 
00060 #endif   /* PORT_PROTOS_H */