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/*-----------------------------------------------------------------*-C-*---
* File: handc/platform/next/dynlink.c
*
* Copyright (C)1997 Donovan Kolbly <d.kolbly@rscheme.org>
* as part of the RScheme project, licensed for free use.
* See <http://www.rscheme.org/> for the latest information.
*
* File version: 1.4
* File mod date: 1997.11.29 23:10:48
* System build: v0.7.2, 97.12.21
*
* Purpose: NeXTSTEP (Mach) dynamic linking interface
*------------------------------------------------------------------------*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef __cplusplus
extern "C" {
#endif
#include <streams/streams.h>
#include <mach-o/rld.h>
#ifdef __cplusplus
}
#endif
#include "schemedl.h"
struct resolved {
struct resolved *next;
const char *sym;
};
struct dlfile {
struct resolved *lookups;
const char *path;
};
static const char *strdup( const char *str )
{
char *p = (char *)malloc( strlen(str)+1 );
strcpy( p, str );
return p;
}
static NXStream *errors = NULL;
void *resolve_link_symbol( void *info, const char *sym )
{
unsigned long val, rc;
struct resolved *i;
struct dlfile *f = (struct dlfile *)info;
if (info)
{
i = (struct resolved *)malloc( sizeof( struct resolved ) );
i->sym = strdup( sym );
i->next = f->lookups;
f->lookups = i;
}
if (!errors)
errors = NXOpenFile( 2, NX_WRITEONLY );
rc = rld_lookup( errors, sym, &val );
NXFlush(errors);
return (rc == 1) ? (void *)val : NULL;
}
void *dynamic_link_file( const char *path )
{
const char *(files[2]) = { path, NULL };
unsigned long rc;
if (!errors)
errors = NXOpenFile( 2, NX_WRITEONLY );
rc = rld_load( errors, NULL, files, NULL );
NXFlush(errors);
if (rc == 1)
{
struct dlfile *f = (struct dlfile *)malloc( sizeof( struct dlfile ) );
f->lookups = NULL;
f->path = strdup( path );
return f;
}
return NULL;
}
void done_resolving( void *info )
{
struct dlfile *f = (struct dlfile *)info;
struct resolved *i, *j;
NXPrintf( errors, "Done with: %s\n", f->path );
for (i=f->lookups; i; i=j)
{
NXPrintf( errors, " forgetting %s\n", i->sym );
rld_forget_symbol( errors, i->sym );
j = i->next;
free( (void *)i->sym );
free( (void *)i );
}
rld_unload_all( errors, 0 );
NXFlush( errors );
free( (void *)f->path );
free( (void *)f );
}
void init_dynamic_link( const char *argv0 )
{
}
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