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Sourcecode: postgresql-8.4 version File versions

bsdi.h

/*-------------------------------------------------------------------------
 *
 * bsdi.h
 *          Dynamic loader interface for BSD/OS
 *
 * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * $PostgreSQL: pgsql/src/backend/port/dynloader/bsdi.h,v 1.26 2009/01/01 17:23:46 momjian Exp $
 *
 *-------------------------------------------------------------------------
 */
#ifndef PORT_PROTOS_H
#define PORT_PROTOS_H

#include "utils/dynamic_loader.h"


#ifdef HAVE_DLOPEN

#include <dlfcn.h>

/*
 * In some older systems, the RTLD_NOW flag isn't defined and the mode
 * argument to dlopen must always be 1.  The RTLD_GLOBAL flag is wanted
 * if available, but it doesn't exist everywhere.
 * If it doesn't exist, set it to 0 so it has no effect.
 */
#ifndef RTLD_NOW
#define RTLD_NOW 1
#endif
#ifndef RTLD_GLOBAL
#define RTLD_GLOBAL 0
#endif

#define             pg_dlopen(f)      dlopen((f), RTLD_NOW | RTLD_GLOBAL)
#define             pg_dlsym          dlsym
#define             pg_dlclose        dlclose
#define             pg_dlerror        dlerror
#else                                     /* not HAVE_DLOPEN */

#define pg_dlsym(handle, funcname)    ((PGFunction) dld_get_func((funcname)))
#define pg_dlclose(handle) \
do { \
      dld_unlink_by_file(handle, 1); \
      free(handle); \
} while (0)
#endif   /* not HAVE_DLOPEN */

#endif   /* PORT_PROTOS_H */

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