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/* dl_next.xs
*
* Platform: NeXT NS 3.2
* Author: Anno Siegel (siegel@zrz.TU-Berlin.DE)
* Based on: dl_dlopen.xs by Paul Marquess
* Created: Aug 15th, 1994
*
*/
/*
And Gandalf said: 'Many folk like to know beforehand what is to
be set on the table; but those who have laboured to prepare the
feast like to keep their secret; for wonder makes the words of
praise louder.'
*/
/* Porting notes:
dl_next.xs is itself a port from dl_dlopen.xs by Paul Marquess. It
should not be used as a base for further ports though it may be used
as an example for how dl_dlopen.xs can be ported to other platforms.
The method used here is just to supply the sun style dlopen etc.
functions in terms of NeXTs rld_*. The xs code proper is unchanged
from Paul's original.
The port could use some streamlining. For one, error handling could
be simplified.
Anno Siegel
*/
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#include "dlutils.c" /* SaveError() etc */
#include <mach-o/rld.h>
#include <streams/streams.h>
static char * dl_last_error = (char *) 0;
NXStream *
OpenError()
{
return NXOpenMemory( (char *) 0, 0, NX_WRITEONLY);
}
void
TransferError( s)
NXStream *s;
{
char *buffer;
int len, maxlen;
if ( dl_last_error ) {
safefree(dl_last_error);
}
NXGetMemoryBuffer(s, &buffer, &len, &maxlen);
dl_last_error = safemalloc(len);
strcpy(dl_last_error, buffer);
}
void
CloseError( s)
NXStream *s;
{
if ( s ) {
NXCloseMemory( s, NX_FREEBUFFER);
}
}
char *dlerror()
{
return dl_last_error;
}
char *
dlopen(path, mode)
char * path;
int mode; /* mode is ignored */
{
int rld_success;
NXStream *nxerr = OpenError();
AV * av_resolve;
I32 i, psize;
char *result;
char **p;
av_resolve = GvAVn(gv_fetchpv(
"DynaLoader::dl_resolve_using", FALSE, SVt_PVAV));
psize = AvFILL(av_resolve) + 3;
p = (char **) safemalloc(psize * sizeof(char*));
p[0] = path;
for(i=1; i<psize-1; i++) {
p[i] = SvPVx(*av_fetch(av_resolve, i-1, TRUE), na);
}
p[psize-1] = 0;
rld_success = rld_load(nxerr, (struct mach_header **)0, p,
(const char *) 0);
safefree((char*) p);
if (rld_success) {
result = path;
} else {
TransferError(nxerr);
result = (char*) 0;
}
CloseError(nxerr);
return result;
}
int
dlclose(handle) /* stub only */
void *handle;
{
return 0;
}
void *
dlsym(handle, symbol)
void *handle;
char *symbol;
{
NXStream *nxerr = OpenError();
char symbuf[1024];
unsigned long symref = 0;
sprintf(symbuf, "_%s", symbol);
if (!rld_lookup(nxerr, symbuf, &symref)) {
TransferError(nxerr);
}
CloseError(nxerr);
return (void*) symref;
}
/* ----- code from dl_dlopen.xs below here ----- */
static void
dl_private_init()
{
(void)dl_generic_private_init();
}
MODULE = DynaLoader PACKAGE = DynaLoader
BOOT:
(void)dl_private_init();
void *
dl_load_file(filename)
char * filename
CODE:
int mode = 1;
DLDEBUG(1,fprintf(stderr,"dl_load_file(%s):\n", filename));
RETVAL = dlopen(filename, mode) ;
DLDEBUG(2,fprintf(stderr," libref=%x\n", RETVAL));
ST(0) = sv_newmortal() ;
if (RETVAL == NULL)
SaveError("%s",dlerror()) ;
else
sv_setiv( ST(0), (IV)RETVAL);
void *
dl_find_symbol(libhandle, symbolname)
void * libhandle
char * symbolname
CODE:
DLDEBUG(2,fprintf(stderr,"dl_find_symbol(handle=%x, symbol=%s)\n",
libhandle, symbolname));
RETVAL = dlsym(libhandle, symbolname);
DLDEBUG(2,fprintf(stderr," symbolref = %x\n", RETVAL));
ST(0) = sv_newmortal() ;
if (RETVAL == NULL)
SaveError("%s",dlerror()) ;
else
sv_setiv( ST(0), (IV)RETVAL);
void
dl_undef_symbols()
PPCODE:
# These functions should not need changing on any platform:
void
dl_install_xsub(perl_name, symref, filename="$Package")
char * perl_name
void * symref
char * filename
CODE:
DLDEBUG(2,fprintf(stderr,"dl_install_xsub(name=%s, symref=%x)\n",
perl_name, symref));
ST(0)=sv_2mortal(newRV((SV*)newXS(perl_name, (void(*)())symref, filename)));
char *
dl_error()
CODE:
RETVAL = LastError ;
OUTPUT:
RETVAL
# end.
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