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freebsd.h
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1 /*-------------------------------------------------------------------------
2  *
3  * freebsd.h
4  * port-specific prototypes for FreeBSD
5  *
6  * Portions Copyright (c) 1996-2017, PostgreSQL Global Development Group
7  * Portions Copyright (c) 1994, Regents of the University of California
8  *
9  * src/backend/port/dynloader/freebsd.h
10  *
11  *-------------------------------------------------------------------------
12  */
13 #ifndef PORT_PROTOS_H
14 #define PORT_PROTOS_H
15 
16 #include <sys/types.h>
17 #include <nlist.h>
18 #include <link.h>
19 #include <dlfcn.h>
20 
21 #include "utils/dynamic_loader.h" /* pgrminclude ignore */
22 
23 /*
24  * Dynamic Loader on NetBSD 1.0.
25  *
26  * this dynamic loader uses the system dynamic loading interface for shared
27  * libraries (ie. dlopen/dlsym/dlclose). The user must specify a shared
28  * library as the file to be dynamically loaded.
29  *
30  * agc - I know this is all a bit crufty, but it does work, is fairly
31  * portable, and works (the stipulation that the d.l. function must
32  * begin with an underscore is fairly tricky, and some versions of
33  * NetBSD (like 1.0, and 1.0A pre June 1995) have no dlerror.)
34  */
35 
36 /*
37  * In some older systems, the RTLD_NOW flag isn't defined and the mode
38  * argument to dlopen must always be 1. The RTLD_GLOBAL flag is wanted
39  * if available, but it doesn't exist everywhere.
40  * If it doesn't exist, set it to 0 so it has no effect.
41  */
42 #ifndef RTLD_NOW
43 #define RTLD_NOW 1
44 #endif
45 #ifndef RTLD_GLOBAL
46 #define RTLD_GLOBAL 0
47 #endif
48 
49 #define pg_dlopen(f) BSD44_derived_dlopen((f), RTLD_NOW | RTLD_GLOBAL)
50 #define pg_dlsym BSD44_derived_dlsym
51 #define pg_dlclose BSD44_derived_dlclose
52 #define pg_dlerror BSD44_derived_dlerror
53 
54 char *BSD44_derived_dlerror(void);
55 void *BSD44_derived_dlopen(const char *filename, int num);
56 void *BSD44_derived_dlsym(void *handle, const char *name);
57 void BSD44_derived_dlclose(void *handle);
58 
59 #endif /* PORT_PROTOS_H */
char * BSD44_derived_dlerror(void)
Definition: freebsd.c:48
void * BSD44_derived_dlsym(void *handle, const char *name)
Definition: freebsd.c:75
void * BSD44_derived_dlopen(const char *filename, int num)
Definition: freebsd.c:58
const char * name
Definition: encode.c:521
static char * filename
Definition: pg_dumpall.c:84
void BSD44_derived_dlclose(void *handle)
Definition: freebsd.c:101