src/backend/port/dynloader/bsdi.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * bsdi.h
   4  *              Dynamic loader interface for BSD/OS
   5  *
   6  * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
   7  * Portions Copyright (c) 1994, Regents of the University of California
   8  *
   9  * $PostgreSQL$
  10  *
  11  *-------------------------------------------------------------------------
  12  */
  13 #ifndef PORT_PROTOS_H
  14 #define PORT_PROTOS_H
  15
  16 #include "utils/dynamic_loader.h"
  17
  18
  19 #ifdef HAVE_DLOPEN
  20
  21 #include <dlfcn.h>
  22
  23 /*
  24  * In some older systems, the RTLD_NOW flag isn't defined and the mode
  25  * argument to dlopen must always be 1.  The RTLD_GLOBAL flag is wanted
  26  * if available, but it doesn't exist everywhere.
  27  * If it doesn't exist, set it to 0 so it has no effect.
  28  */
  29 #ifndef RTLD_NOW
  30 #define RTLD_NOW 1
  31 #endif
  32 #ifndef RTLD_GLOBAL
  33 #define RTLD_GLOBAL 0
  34 #endif
  35
  36 #define           pg_dlopen(f)    dlopen((f), RTLD_NOW | RTLD_GLOBAL)
  37 #define           pg_dlsym                dlsym
  38 #define           pg_dlclose      dlclose
  39 #define           pg_dlerror      dlerror
  40 #else                                                   /* not HAVE_DLOPEN */
  41
  42 #define pg_dlsym(handle, funcname)        ((PGFunction) dld_get_func((funcname)))
  43 #define pg_dlclose(handle) \
  44 do { \
  45         dld_unlink_by_file(handle, 1); \
  46         free(handle); \
  47 } while (0)
  48 #endif   /* not HAVE_DLOPEN */
  49
  50 #endif   /* PORT_PROTOS_H */