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- /***********************************************************
- Copyright 1991, 1992, 1993, 1994 by Stichting Mathematisch Centrum,
- Amsterdam, The Netherlands.
-
- All Rights Reserved
-
- Permission to use, copy, modify, and distribute this software and its
- documentation for any purpose and without fee is hereby granted,
- 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 names of Stichting Mathematisch
- Centrum or CWI not be used in advertising or publicity pertaining to
- distribution of the software without specific, written prior permission.
-
- STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
- THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
- FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM 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.
-
- ******************************************************************/
-
- /* dl module */
-
- #include "allobjects.h"
- #include "modsupport.h"
-
- #include <dlfcn.h>
-
- #ifndef RTLD_LAZY
- #define RTLD_LAZY 1
- #endif
-
- typedef struct {
- OB_HEAD
- ANY *dl_handle;
- } dlobject;
-
- staticforward typeobject Dltype;
-
- static object *Dlerror;
-
- static object *
- newdlobject(handle)
- ANY *handle;
- {
- dlobject *xp;
- xp = NEWOBJ(dlobject, &Dltype);
- if (xp == NULL)
- return NULL;
- xp->dl_handle = handle;
- return (object *)xp;
- }
-
- static void
- dl_dealloc(xp)
- dlobject *xp;
- {
- if (xp->dl_handle != NULL)
- dlclose(xp->dl_handle);
- DEL(xp);
- }
-
- static object *
- dl_close(xp, args)
- dlobject *xp;
- object *args;
- {
- if (!getargs(args, ""))
- return NULL;
- if (xp->dl_handle != NULL) {
- dlclose(xp->dl_handle);
- xp->dl_handle = NULL;
- }
- INCREF(None);
- return None;
- }
-
- static object *
- dl_sym(xp, args)
- dlobject *xp;
- object *args;
- {
- char *name;
- ANY *func;
- if (!getargs(args, "s", &name))
- return NULL;
- func = dlsym(xp->dl_handle, name);
- if (func == NULL) {
- INCREF(None);
- return None;
- }
- return newintobject((long)func);
- }
-
- static object *
- dl_call(xp, args)
- dlobject *xp;
- object *args; /* (varargs) */
- {
- object *name;
- long (*func)();
- long alist[10];
- long res;
- int i;
- int n = gettuplesize(args);
- if (n < 1) {
- err_setstr(TypeError, "at least a name is needed");
- return NULL;
- }
- name = gettupleitem(args, 0);
- if (!is_stringobject(name)) {
- err_setstr(TypeError, "function name must be a string");
- return NULL;
- }
- func = dlsym(xp->dl_handle, getstringvalue(name));
- if (func == NULL) {
- err_setstr(ValueError, dlerror());
- return NULL;
- }
- if (n-1 > 10) {
- err_setstr(TypeError, "too many arguments (max 10)");
- return NULL;
- }
- for (i = 1; i < n; i++) {
- object *v = gettupleitem(args, i);
- if (is_intobject(v))
- alist[i-1] = getintvalue(v);
- else if (is_stringobject(v))
- alist[i-1] = (long)getstringvalue(v);
- else if (v == None)
- alist[i-1] = (long) ((char *)NULL);
- else {
- err_setstr(TypeError,
- "arguments must be int, string or None");
- return NULL;
- }
- }
- for (; i <= 10; i++)
- alist[i-1] = 0;
- res = (*func)(alist[0], alist[1], alist[2], alist[3], alist[4],
- alist[5], alist[6], alist[7], alist[8], alist[9]);
- return newintobject(res);
- }
-
- static struct methodlist dlobject_methods[] = {
- {"call", (method)dl_call, 1 /* varargs */},
- {"sym", (method)dl_sym},
- {"close", (method)dl_close},
- {NULL, NULL} /* Sentinel */
- };
-
- static object *
- dl_getattr(xp, name)
- dlobject *xp;
- char *name;
- {
- return findmethod(dlobject_methods, (object *)xp, name);
- }
-
-
- static typeobject Dltype = {
- OB_HEAD_INIT(&Typetype)
- 0, /*ob_size*/
- "dl", /*tp_name*/
- sizeof(dlobject), /*tp_basicsize*/
- 0, /*tp_itemsize*/
- /* methods */
- (destructor)dl_dealloc, /*tp_dealloc*/
- 0, /*tp_print*/
- (getattrfunc)dl_getattr,/*tp_getattr*/
- 0, /*tp_setattr*/
- 0, /*tp_compare*/
- 0, /*tp_repr*/
- 0, /*tp_as_number*/
- 0, /*tp_as_sequence*/
- 0, /*tp_as_mapping*/
- 0, /*tp_hash*/
- };
-
- static object *
- dl_open(self, args)
- object *self;
- object *args;
- {
- char *name;
- int mode;
- ANY *handle;
- if (getargs(args, "z", &name))
- mode = RTLD_LAZY;
- else {
- err_clear();
- if (!getargs(args, "(zi)", &name, &mode))
- return NULL;
- #ifndef RTLD_NOW
- if (mode != RTLD_LAZY) {
- err_setstr(ValueError, "mode must be 1");
- return NULL;
- }
- #endif
- }
- handle = dlopen(name, mode);
- if (handle == NULL) {
- err_setstr(Dlerror, dlerror());
- return NULL;
- }
- return newdlobject(handle);
- }
-
- static struct methodlist dl_methods[] = {
- {"open", dl_open},
- {NULL, NULL} /* sentinel */
- };
-
- void
- initdl()
- {
- object *m, *d, *x;
-
- if (sizeof(int) != sizeof(long) ||
- sizeof(long) != sizeof(char *))
- fatal(
- "module dl requires sizeof(int) == sizeof(long) == sizeof(char*)");
-
- /* Create the module and add the functions */
- m = initmodule("dl", dl_methods);
-
- /* Add some symbolic constants to the module */
- d = getmoduledict(m);
- Dlerror = x = newstringobject("dl.error");
- dictinsert(d, "error", x);
- x = newintobject((long)RTLD_LAZY);
- dictinsert(d, "RTLD_LAZY", x);
- #ifdef RTLD_NOW
- x = newintobject((long)RTLD_NOW);
- dictinsert(d, "RTLD_NOW", x);
- #endif
-
- /* Check for errors */
- if (err_occurred())
- fatal("can't initialize module dl");
- }
-