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/*-------------------------------------------------------------------------
*
* dynloader.c
* Dynamic Loader for Postgres for BeOS
*
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/port/dynloader/Attic/beos.c,v 1.7 2001/03/22 03:59:42 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "utils/dynamic_loader.h"
void *
pg_dlopen(char *filename)
{
image_id *im;
/* Handle memory allocation to store the Id of the shared object */
im = (image_id *) (malloc(sizeof(image_id)));
/* Add-on loading */
*im = beos_dl_open(filename);
return im;
}
char *
pg_dlerror()
{
static char errmsg[] = "Load Add-On failed";
return errmsg;
}
PGFunction
pg_dlsym(void *handle, char *funcname)
{
PGFunction fpt;
/* Checking that "Handle" is valid */
if ((handle) && ((*(int *) (handle)) >= 0))
{
/* Loading symbol */
if (get_image_symbol(*((int *) (handle)), funcname, B_SYMBOL_TYPE_TEXT, (void **) &fpt) == B_OK);
{
/*
* Sometime the loader return B_OK for an inexistant function
* with an invalid address !!! Check that the return address
* is in the image range
*/
image_info info;
get_image_info(*((int *) (handle)), &info);
if ((fpt < info.text) ||(fpt >= (info.text +info.text_size)))
return NULL;
return fpt;
}
elog(NOTICE, "loading symbol '%s' failed ", funcname);
}
elog(NOTICE, "add-on not loaded correctly");
return NULL;
}
void
pg_dlclose(void *handle)
{
/* Checking that "Handle" is valid */
if ((handle) && ((*(int *) (handle)) >= 0))
{
if (beos_dl_close(*(image_id *) handle) != B_OK)
elog(NOTICE, "error while unloading add-on");
free(handle);
}
}
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