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/*
* Copyright © 2005 Novell, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software
* and its documentation for any purpose is hereby granted without
* fee, provided that the above copyright notice appear in all copies
* and that both that copyright notice and this permission notice
* appear in supporting documentation, and that the name of
* Novell, Inc. not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior permission.
* Novell, Inc. makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*
* NOVELL, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
* NO EVENT SHALL NOVELL, INC. BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
* OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Author: David Reveman <davidr@novell.com>
*/
#include "xgl.h"
#include "xglmodule.h"
#ifdef XGL_MODULAR
#include <dlfcn.h>
#define SYM(ptr, name) { (void **) &(ptr), (name) }
void *
xglLoadModule (const char *name,
int flag)
{
ModuleVersionProcPtr moduleVersion;
ModuleInitProcPtr moduleInit;
void *handle = 0;
char *module;
xglSymbolRec mSym[] = {
SYM (moduleVersion, "moduleVersion"),
SYM (moduleInit, "moduleInit")
};
module = malloc (strlen (XGL_MODULE_PATH "/lib.so") + strlen (name) + 1);
if (!module)
return 0;
sprintf (module, XGL_MODULE_PATH "/lib%s.so", name);
handle = dlopen (module, flag);
if (handle)
{
if (xglLookupSymbols (handle, mSym, sizeof (mSym) / sizeof (mSym[0])))
{
const char *version;
version = (*moduleVersion) ();
if (strcmp (VERSION, version) == 0)
{
if (!(*moduleInit) (module))
{
dlclose (handle);
handle = 0;
}
}
else
{
ErrorF ("Module version mismatch. "
"%s is %s Xserver is" VERSION "\n",
module, version);
dlclose (handle);
handle = 0;
}
}
else
{
dlclose (handle);
handle = 0;
}
}
else
ErrorF ("dlopen: %s\n", dlerror ());
free (module);
return handle;
}
void
xglUnloadModule (void *handle)
{
dlclose (handle);
}
Bool
xglLookupSymbols (void *handle,
xglSymbolPtr sym,
int nSym)
{
void *symbol;
char *error;
int i;
/* avoid previous error */
dlerror ();
for (i = 0; i < nSym; i++)
{
symbol = dlsym (handle, sym[i].name);
if (!symbol)
{
error = dlerror ();
if (error != 0)
ErrorF ("dlsym: %s: %s\n", sym[i].name, error);
return FALSE;
}
*(sym[i].ptr) = symbol;
}
return TRUE;
}
#endif
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