273 lines
6.5 KiB
C
273 lines
6.5 KiB
C
/*************************************************************************
|
|
* *
|
|
* YAP Prolog *
|
|
* *
|
|
* Yap Prolog was developed at NCCUP - Universidade do Porto *
|
|
* *
|
|
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
|
|
* *
|
|
**************************************************************************
|
|
* *
|
|
* File: load_foreign.c *
|
|
* comments: dynamic loader of external routines *
|
|
* *
|
|
*************************************************************************/
|
|
#ifdef SCCS
|
|
static char SccsId[] = "%W% %G%.2";
|
|
#endif
|
|
|
|
|
|
#include "Yap.h"
|
|
#include "Yatom.h"
|
|
#include "YapHeap.h"
|
|
#include "yapio.h"
|
|
#include "pl-shared.h"
|
|
#include "YapText.h"
|
|
#include <stdlib.h>
|
|
#if HAVE_STRING_H
|
|
#include <string.h>
|
|
#endif
|
|
|
|
#include "Foreign.h"
|
|
|
|
#if _WIN32 || defined(__CYGWIN__)
|
|
#ifndef SO_EXT
|
|
#define SO_EXT "dll"
|
|
#endif
|
|
#endif
|
|
|
|
Int p_load_foreign( USES_REGS1 );
|
|
|
|
Int
|
|
p_load_foreign( USES_REGS1 )
|
|
{
|
|
StringList ofiles = NULL;
|
|
StringList libs = NULL;
|
|
char *InitProcName;
|
|
YapInitProc InitProc = NULL;
|
|
Term t, t1;
|
|
StringList new;
|
|
Int returncode = FALSE;
|
|
yhandle_t CurSlot = Yap_StartSlots();
|
|
|
|
strcpy(LOCAL_ErrorSay,"Invalid arguments");
|
|
|
|
/* collect the list of object files */
|
|
t = Deref(ARG1);
|
|
while(1) {
|
|
if (t == TermNil) break;
|
|
t1 = HeadOfTerm(t);
|
|
t = TailOfTerm(t);
|
|
new = (StringList) Yap_AllocCodeSpace(sizeof(StringListItem));
|
|
new->next = ofiles;
|
|
new->name = AtomOfTerm(t1);
|
|
ofiles = new;
|
|
}
|
|
|
|
/* collect the list of library files */
|
|
t = Deref(ARG2);
|
|
while(1) {
|
|
if (t == TermNil) break;
|
|
t1 = HeadOfTerm(t);
|
|
t = TailOfTerm(t);
|
|
new = (StringList) Yap_AllocCodeSpace(sizeof(StringListItem));
|
|
new->next = libs;
|
|
new->name = AtomOfTerm(t1);
|
|
libs = new;
|
|
}
|
|
|
|
/* get the initialization function name */
|
|
t1 = Deref(ARG3);
|
|
InitProcName = RepAtom(AtomOfTerm(t1))->StrOfAE;
|
|
|
|
/* call the OS specific function for dynamic loading */
|
|
if(Yap_LoadForeign(ofiles,libs,InitProcName,&InitProc)==LOAD_SUCCEEDED) {
|
|
Yap_StartSlots( );
|
|
(*InitProc)();
|
|
Yap_CloseSlots(CurSlot);
|
|
returncode = TRUE;
|
|
}
|
|
|
|
/* I should recover space if load foreign fails */
|
|
if (returncode == TRUE) {
|
|
ForeignObj *f_code = (ForeignObj *)Yap_AllocCodeSpace(sizeof(ForeignObj));
|
|
f_code->objs = ofiles;
|
|
f_code->libs = libs;
|
|
f_code->f = AtomOfTerm(t1);
|
|
f_code->next = ForeignCodeLoaded;
|
|
f_code->module = CurrentModule;
|
|
ForeignCodeLoaded = f_code;
|
|
} else {
|
|
while (ofiles) {
|
|
new = ofiles->next;
|
|
Yap_FreeCodeSpace((ADDR)ofiles);
|
|
ofiles = new;
|
|
}
|
|
while (libs) {
|
|
new = libs->next;
|
|
Yap_FreeCodeSpace((ADDR)libs);
|
|
libs = new;
|
|
}
|
|
}
|
|
return returncode;
|
|
}
|
|
|
|
static Int
|
|
p_open_shared_object( USES_REGS1 ) {
|
|
Term t = Deref(ARG1);
|
|
Term tflags = Deref(ARG2);
|
|
char *s;
|
|
void *handle;
|
|
|
|
if (IsVarTerm(t)) {
|
|
Yap_Error(INSTANTIATION_ERROR,t,"open_shared_object/3");
|
|
return FALSE;
|
|
}
|
|
if (!IsAtomTerm(t)) {
|
|
Yap_Error(TYPE_ERROR_ATOM,t,"open_shared_object/3");
|
|
return FALSE;
|
|
}
|
|
|
|
if (IsVarTerm(tflags)) {
|
|
Yap_Error(INSTANTIATION_ERROR,tflags,"open_shared_object/3");
|
|
return FALSE;
|
|
}
|
|
if (!IsIntegerTerm(tflags)) {
|
|
Yap_Error(TYPE_ERROR_INTEGER,tflags,"open_shared_object/3");
|
|
return FALSE;
|
|
}
|
|
|
|
s = RepAtom(AtomOfTerm(t))->StrOfAE;
|
|
if ((handle = Yap_LoadForeignFile(s, IntegerOfTerm(tflags)))==NULL) {
|
|
Yap_Error(EXISTENCE_ERROR_SOURCE_SINK,t,"open_shared_object_failed for %s with %s\n", s, LOCAL_ErrorSay);
|
|
return FALSE;
|
|
} else {
|
|
return Yap_unify(MkIntegerTerm((Int)handle),ARG3);
|
|
}
|
|
}
|
|
|
|
static Int
|
|
p_close_shared_object( USES_REGS1 ) {
|
|
Term t = Deref(ARG1);
|
|
void *handle;
|
|
|
|
if (IsVarTerm(t)) {
|
|
Yap_Error(INSTANTIATION_ERROR,t,"close_shared_object/1");
|
|
return FALSE;
|
|
}
|
|
if (!IsIntegerTerm(t)) {
|
|
Yap_Error(TYPE_ERROR_INTEGER,t,"close_shared_object/1");
|
|
return FALSE;
|
|
}
|
|
handle = (char *)IntegerOfTerm(t);
|
|
|
|
return Yap_CloseForeignFile(handle);
|
|
}
|
|
|
|
static Int
|
|
p_call_shared_object_function( USES_REGS1 ) {
|
|
Term t = Deref(ARG1);
|
|
Term tfunc = Deref(ARG2);
|
|
Term tmod;
|
|
void *handle;
|
|
Term OldCurrentModule = CurrentModule;
|
|
Int res;
|
|
|
|
tmod = CurrentModule;
|
|
restart:
|
|
if (IsVarTerm(t)) {
|
|
Yap_Error(INSTANTIATION_ERROR,t,"call_shared_object_function/2");
|
|
return FALSE;
|
|
} else if (IsApplTerm(t)) {
|
|
Functor fun = FunctorOfTerm(t);
|
|
if (fun == FunctorModule) {
|
|
tmod = ArgOfTerm(1, t);
|
|
if (IsVarTerm(tmod) ) {
|
|
Yap_Error(INSTANTIATION_ERROR,t,"call_shared_object_function/2");
|
|
return FALSE;
|
|
}
|
|
if (!IsAtomTerm(tmod) ) {
|
|
Yap_Error(TYPE_ERROR_ATOM,ARG1,"call_shared_object_function/2");
|
|
return FALSE;
|
|
}
|
|
t = ArgOfTerm(2, t);
|
|
goto restart;
|
|
}
|
|
} else if (!IsIntegerTerm(t)) {
|
|
Yap_Error(TYPE_ERROR_INTEGER,t,"call_shared_object_function/2");
|
|
return FALSE;
|
|
}
|
|
handle = (void *)IntegerOfTerm(t);
|
|
if (IsVarTerm(tfunc)) {
|
|
Yap_Error(INSTANTIATION_ERROR,t,"call_shared_object_function/2");
|
|
return FALSE;
|
|
}
|
|
if (!IsAtomTerm(tfunc)) {
|
|
Yap_Error(TYPE_ERROR_ATOM,t,"call_shared_object_function/2/3");
|
|
return FALSE;
|
|
}
|
|
CurrentModule = tmod;
|
|
res = Yap_CallForeignFile(handle, RepAtom(AtomOfTerm(tfunc))->StrOfAE);
|
|
CurrentModule = OldCurrentModule;
|
|
return res;
|
|
}
|
|
|
|
static Int
|
|
p_obj_suffix( USES_REGS1 ) {
|
|
return Yap_unify(Yap_CharsToListOfCodes(SO_EXT PASS_REGS),ARG1);
|
|
}
|
|
|
|
static Int
|
|
p_open_shared_objects( USES_REGS1 ) {
|
|
#ifdef SO_EXT
|
|
return TRUE;
|
|
#else
|
|
return FALSE;
|
|
#endif
|
|
}
|
|
|
|
void
|
|
Yap_InitLoadForeign( void )
|
|
{
|
|
Yap_InitCPred("$load_foreign_files", 3, p_load_foreign, SafePredFlag|SyncPredFlag);
|
|
Yap_InitCPred("$open_shared_objects", 0, p_open_shared_objects, SafePredFlag);
|
|
Yap_InitCPred("$open_shared_object", 3, p_open_shared_object, SyncPredFlag);
|
|
Yap_InitCPred("close_shared_object", 1, p_close_shared_object, SyncPredFlag|SafePredFlag);
|
|
/** @pred close_shared_object(+ _Handle_)
|
|
|
|
Detach the shared object identified by _Handle_.
|
|
|
|
|
|
*/
|
|
Yap_InitCPred("$call_shared_object_function", 2, p_call_shared_object_function, SyncPredFlag);
|
|
Yap_InitCPred("$obj_suffix", 1, p_obj_suffix, SafePredFlag);
|
|
}
|
|
|
|
void
|
|
Yap_ReOpenLoadForeign(void)
|
|
{
|
|
CACHE_REGS
|
|
ForeignObj *f_code = ForeignCodeLoaded;
|
|
Term OldModule = CurrentModule;
|
|
|
|
while (f_code != NULL) {
|
|
YapInitProc InitProc = NULL;
|
|
|
|
CurrentModule = f_code->module;
|
|
if(Yap_ReLoadForeign(f_code->objs,f_code->libs,RepAtom(f_code->f)->StrOfAE,&InitProc)==LOAD_SUCCEEDED) {
|
|
if (InitProc)
|
|
(*InitProc)();
|
|
}
|
|
f_code = f_code->next;
|
|
}
|
|
CurrentModule = OldModule;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|