postgresql/src/include/utils/dynamic_loader.h

/*-------------------------------------------------------------------------
 *
 * dynamic_loader.h--
 *
 *
 *
 * Copyright (c) 1994, Regents of the University of California
 *
 * $Id: dynamic_loader.h,v 1.6 1997/09/07 05:02:22 momjian Exp $
 *
 *-------------------------------------------------------------------------
 */
#ifndef DYNAMIC_LOADER_H
#define DYNAMIC_LOADER_H

#include <sys/types.h>
#include <sys/param.h>			/* For MAXPATHLEN */

#include <postgres.h>

#ifdef MIN
#undef MIN
#undef MAX
#endif							/* MIN */

/*
 * List of dynamically loaded files.
 */

typedef struct df_files
{
	char			filename[MAXPATHLEN];		/* Full pathname of file */
	dev_t			device;		/* Device file is on */
	ino_t			inode;		/* Inode number of file */
	void		   *handle;		/* a handle for pg_dl* functions */
	struct df_files *next;
}				DynamicFileList;

extern void    *pg_dlopen(char *filename);
extern func_ptr pg_dlsym(void *handle, char *funcname);
extern void		pg_dlclose(void *handle);
extern char    *pg_dlerror(void);

#endif							/* DYNAMIC_LOADER_H */