11/*
22 * Dynamic loading support for macOS (Darwin)
33 *
4- * If dlopen() is available (Darwin 10.3 and later), we just use it.
5- * Otherwise we emulate it with the older, now deprecated, NSLinkModule API.
6- *
74 * src/backend/port/dynloader/darwin.c
85 */
96#include "postgres.h"
107
11- #ifdef HAVE_DLOPEN
128#include <dlfcn.h>
13- #else
14- #include <mach-o/dyld.h>
15- #endif
169
1710#include "dynloader.h"
1811
1912
20- #ifdef HAVE_DLOPEN
21-
2213void *
2314pg_dlopen (const char * filename )
2415{
@@ -34,7 +25,6 @@ pg_dlclose(void *handle)
3425PGFunction
3526pg_dlsym (void * handle ,const char * funcname )
3627{
37- /* Do not prepend an underscore: see dlopen(3) */
3828return dlsym (handle ,funcname );
3929}
4030
@@ -43,96 +33,3 @@ pg_dlerror(void)
4333{
4434return dlerror ();
4535}
46- #else /* !HAVE_DLOPEN */
47-
48- /*
49- * These routines were taken from the Apache source, but were made
50- * available with a PostgreSQL-compatible license. Kudos Wilfredo
51- * Sánchez <wsanchez@apple.com>.
52- */
53-
54- static NSObjectFileImageReturnCode cofiff_result = NSObjectFileImageFailure ;
55-
56- void *
57- pg_dlopen (const char * filename )
58- {
59- NSObjectFileImage image ;
60-
61- cofiff_result = NSCreateObjectFileImageFromFile (filename ,& image );
62- if (cofiff_result != NSObjectFileImageSuccess )
63- return NULL ;
64- return NSLinkModule (image ,filename ,
65- NSLINKMODULE_OPTION_BINDNOW |
66- NSLINKMODULE_OPTION_RETURN_ON_ERROR );
67- }
68-
69- void
70- pg_dlclose (void * handle )
71- {
72- NSUnLinkModule (handle ,NSUNLINKMODULE_OPTION_NONE );
73- }
74-
75- PGFunction
76- pg_dlsym (void * handle ,const char * funcname )
77- {
78- NSSymbol symbol ;
79- char * symname = (char * )malloc (strlen (funcname )+ 2 );
80-
81- if (!symname )
82- return NULL ;
83-
84- sprintf (symname ,"_%s" ,funcname );
85- if (NSIsSymbolNameDefined (symname ))
86- {
87- symbol = NSLookupAndBindSymbol (symname );
88-
89- free (symname );
90- return (PGFunction )NSAddressOfSymbol (symbol );
91- }
92- else
93- {
94- free (symname );
95- return NULL ;
96- }
97- }
98-
99- char *
100- pg_dlerror (void )
101- {
102- NSLinkEditErrors c ;
103- int errorNumber ;
104- const char * fileName ;
105- const char * errorString = NULL ;
106-
107- switch (cofiff_result )
108- {
109- case NSObjectFileImageSuccess :
110- /* must have failed in NSLinkModule */
111- NSLinkEditError (& c ,& errorNumber ,& fileName ,& errorString );
112- if (errorString == NULL || * errorString == '\0' )
113- errorString = "unknown link-edit failure" ;
114- break ;
115- case NSObjectFileImageFailure :
116- errorString = "failed to open object file" ;
117- break ;
118- case NSObjectFileImageInappropriateFile :
119- errorString = "inappropriate object file" ;
120- break ;
121- case NSObjectFileImageArch :
122- errorString = "object file is for wrong architecture" ;
123- break ;
124- case NSObjectFileImageFormat :
125- errorString = "object file has wrong format" ;
126- break ;
127- case NSObjectFileImageAccess :
128- errorString = "insufficient permissions for object file" ;
129- break ;
130- default :
131- errorString = "unknown failure to open object file" ;
132- break ;
133- }
134-
135- return (char * )errorString ;
136- }
137-
138- #endif /* HAVE_DLOPEN */