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/*-------------------------------------------------------------------------
*
* linux.h
* Port-specific prototypes for Linux
*
*
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: linux.h,v 1.18 2002/06/20 20:29:33 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef PORT_PROTOS_H
#define PORT_PROTOS_H
#include "utils/dynamic_loader.h"
#ifdef HAVE_DLOPEN
#include <dlfcn.h>
#endif
#ifndef HAVE_DLOPEN
#ifndef HAVE_DLD_H
#define pg_dlsym(handle, funcname) (NULL)
#define pg_dlclose(handle) {}
#else
#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
#else /* HAVE_DLOPEN */
/*
* 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
#endif /* HAVE_DLOPEN */
#endif /* PORT_PROTOS_H */
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