176 lines
3.5 KiB
C
176 lines
3.5 KiB
C
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#include "Yap.h"
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#include "Yatom.h"
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#include "YapHeap.h"
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#include "yapio.h"
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#include "Foreign.h"
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#if LOAD_SHL
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#include <dl.h>
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#include <malloc.h>
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#include <stdio.h>
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/*
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* YAP_FindExecutable(argv[0]) should be called on yap initialization to
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* locate the executable of Yap
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*/
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char * Yap_FindExecutable(void)
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{
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}
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void *
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Yap_LoadForeignFile(char *file, int flags)
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{
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/* not implemented */
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return NULL;
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}
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int
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Yap_CallForeignFile(void *handle, char *f)
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{
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return FALSE;
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}
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int
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Yap_CloseForeignFile(void *handle)
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{
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return -1;
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}
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/*
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* LoadForeign(ofiles,libs,proc_name,init_proc) dynamically loads foreign
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* code files and libraries and locates an initialization routine
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*/
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static Int
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LoadForeign( StringList ofiles, StringList libs,
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char *proc_name, YapInitProc *init_proc )
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{
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/* *init_proc is initialized to NULL in load_foreign.c */
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int init_missing = -1;
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int n, i;
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struct shl_symbol *p;
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while( ofiles ) {
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int valid_fname;
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/* shl_load wants to follow the LD_CONFIG_PATH */
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const char *file = AtomName(ofiles->name);
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valid_fname = Yap_findFile(file, NULL, NULL, LOCAL_FileNameBuf, true, YAP_OBJ, true, true);
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if( !valid_fname ) {
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strcpy( LOCAL_ErrorSay, "%% Trying to open non-existing file in LoadForeign" );
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return LOAD_FAILLED;
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}
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ofiles->handle = Yap_AllocCodeSpace( sizeof(shl_t) );
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*(shl_t *)ofiles->handle = shl_load( LOCAL_FileNameBuf, BIND_DEFERRED, 0 );
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if( *(shl_t *)ofiles->handle == NULL ) {
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strncpy( LOCAL_ErrorSay, strerror(errno), MAX_ERROR_MSG_SIZE );
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return LOAD_FAILLED;
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}
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if( init_missing ) {
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init_missing = shl_findsym( ofiles->handle, proc_name,
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TYPE_PROCEDURE, init_proc );
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}
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ofiles = ofiles->next;
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}
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if( init_missing ) {
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strcpy( LOCAL_ErrorSay, "Could not locate initialization routine" );
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return LOAD_FAILLED;
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}
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while( libs ) {
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char *s = AtomName(lib->s);
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if( s[0] == '-' ) {
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strcpy( LOCAL_FileNameBuf, "lib" );
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strcat( LOCAL_FileNameBuf, s+2 );
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strcat( LOCAL_FileNameBuf, ".sl" );
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}
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else {
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strcpy( LOCAL_FileNameBuf, s );
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}
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*(shl_t *)libs->handle = shl_load( LOCAL_FileNameBuf, BIND_DEFERRED, 0 );
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if( *(shl_t *)libs->handle == NULL ) {
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strncpy( LOCAL_ErrorSay, strerror(errno), MAX_ERROR_MSG_SIZE );
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return LOAD_FAILLED;
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}
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libs = libs->next;
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}
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return LOAD_SUCCEEDED;
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}
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Int
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Yap_LoadForeign(StringList ofiles, StringList libs,
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char *proc_name, YapInitProc *init_proc)
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{
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return LoadForeign(ofiles, libs, proc_name, init_proc);
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}
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void
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Yap_ShutdownLoadForeign( void )
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{
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ForeignObj *f_code;
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int err;
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f_code = ForeignCodeLoaded;
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while( f_code != NULL ) {
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StringList objs, libs;
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objs = f_code->objs;
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while( objs ) {
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err = shl_unload( *(shl_t *)objs->handle );
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if( err ) {
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/* dunno how to properly report an error here */
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perror( NULL );
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return;
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}
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Yap_FreeCodeSpace( objs->handle );
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objs = objs->next;
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}
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libs = f_code->libs;
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while( libs ) {
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err = shl_unload( *(shl_t *)libs->handle );
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if( err ) {
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/* dunno how to properly report an error here */
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perror( NULL );
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return;
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}
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Yap_FreeCodeSpace( libs->handle );
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libs = libs->next;
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}
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f_code = f_code->next;
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}
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}
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Int
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Yap_ReLoadForeign(StringList ofiles, StringList libs,
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char *proc_name, YapInitProc *init_proc)
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{
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ShutdownLoadForeign();
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return( LoadForeign( ofiles, libs, proc_name, init_proc ) );
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}
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/*
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dunno what this one is supposed to do, no load_* defines it
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void ReOpenLoadForeign(void);
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*/
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#endif
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