remove struct pic_picjmp

extlib/benz/cont.c

@@ -51,9 +51,6 @@ pic_dynamic_wind(pic_state *pic, struct pic_proc *in, struct pic_proc *thunk, st
 void
 pic_save_point(pic_state *pic, struct pic_cont *cont)
 {
-  cont->jmp.prev = pic->jmp;
-  pic->jmp = &cont->jmp;
-
   /* save runtime context */
   cont->cp = pic->cp;
   cont->sp_offset = pic->sp - pic->stbase;
@@ -62,21 +59,23 @@ pic_save_point(pic_state *pic, struct pic_cont *cont)
   cont->arena_idx = pic->arena_idx;
   cont->ip = pic->ip;
   cont->ptable = pic->ptable;
-
+  cont->prev = pic->cc;
   cont->results = pic_undef_value();
+
+  pic->cc = cont;
 }
 
 void
 pic_load_point(pic_state *pic, struct pic_cont *cont)
 {
-  pic_jmpbuf *jmp;
+  struct pic_cont *cc;
 
-  for (jmp = pic->jmp; jmp != NULL; jmp = jmp->prev) {
-    if (jmp == &cont->jmp) {
+  for (cc = pic->cc; cc != NULL; cc = cc->prev) {
+    if (cc == cont) {
       break;
     }
   }
-  if (jmp == NULL) {
+  if (cc == NULL) {
     pic_errorf(pic, "calling dead escape continuation");
   }
 
@@ -106,7 +105,7 @@ cont_call(pic_state *pic)
 
   pic_load_point(pic, e->data);
 
-  PIC_LONGJMP(pic, ((struct pic_cont *)e->data)->jmp.buf, 1);
+  PIC_LONGJMP(pic, ((struct pic_cont *)e->data)->jmp, 1);
 
   PIC_UNREACHABLE();
 }
@@ -114,7 +113,7 @@ cont_call(pic_state *pic)
 struct pic_proc *
 pic_make_cont(pic_state *pic, struct pic_cont *cont)
 {
-  static const pic_data_type cont_type = { "cont", pic_free, NULL };
+  static const pic_data_type cont_type = { "cont", NULL, NULL };
   struct pic_proc *c;
   struct pic_data *e;
 
@@ -131,21 +130,21 @@ pic_make_cont(pic_state *pic, struct pic_cont *cont)
 pic_value
 pic_callcc(pic_state *pic, struct pic_proc *proc)
 {
-  struct pic_cont *cont = pic_malloc(pic, sizeof(struct pic_cont));
+  struct pic_cont cont;
 
-  pic_save_point(pic, cont);
+  pic_save_point(pic, &cont);
 
-  if (PIC_SETJMP(pic, cont->jmp.buf)) {
-    pic->jmp = pic->jmp->prev;
+  if (PIC_SETJMP(pic, cont.jmp)) {
+    pic->cc = pic->cc->prev;
 
-    return pic_values_by_list(pic, cont->results);
+    return pic_values_by_list(pic, cont.results);
   }
   else {
     pic_value val;
 
-    val = pic_apply1(pic, proc, pic_obj_value(pic_make_cont(pic, cont)));
+    val = pic_apply1(pic, proc, pic_obj_value(pic_make_cont(pic, &cont)));
 
-    pic->jmp = pic->jmp->prev;
+    pic->cc = pic->cc->prev;
 
     return val;
   }

extlib/benz/gc.c

@@ -702,7 +702,9 @@ gc_finalize_object(pic_state *pic, struct pic_object *obj)
   }
   case PIC_TT_DATA: {
     struct pic_data *data = (struct pic_data *)obj;
-    data->type->dtor(pic, data->data);
+    if (data->type->dtor) {
+      data->type->dtor(pic, data->data);
+    }
     xh_destroy(&data->storage);
     break;
   }

extlib/benz/include/picrin.h

@@ -47,11 +47,6 @@ typedef struct pic_state pic_state;
 #include "picrin/read.h"
 #include "picrin/gc.h"
 
-typedef struct pic_jmpbuf {
-  PIC_JMPBUF buf;
-  struct pic_jmpbuf *prev;
-} pic_jmpbuf;
-
 typedef struct pic_checkpoint {
   PIC_OBJECT_HEADER
   struct pic_proc *in;
@@ -78,7 +73,7 @@ struct pic_state {
 
   pic_allocf allocf;
 
-  pic_jmpbuf *jmp;
+  struct pic_cont *cc;
   pic_checkpoint *cp;
 
   pic_value *sp;

extlib/benz/include/picrin/cont.h

@@ -10,7 +10,7 @@ extern "C" {
 #endif
 
 struct pic_cont {
-  pic_jmpbuf jmp;
+  PIC_JMPBUF jmp;
 
   pic_checkpoint *cp;
 
@@ -18,12 +18,13 @@ struct pic_cont {
   ptrdiff_t ci_offset;
   ptrdiff_t xp_offset;
   size_t arena_idx;
+  pic_value ptable;
 
   pic_code *ip;
 
-  pic_value ptable;
-
   pic_value results;
+
+  struct pic_cont *prev;
 };
 
 void pic_save_point(pic_state *, struct pic_cont *);

extlib/benz/include/picrin/error.h

@@ -30,21 +30,21 @@ struct pic_error *pic_make_error(pic_state *, pic_sym *, const char *, pic_list)
   pic_catch_(PIC_GENSYM(label))
 #define pic_try_(cont, handler)                                         \
   do {                                                                  \
-    struct pic_cont *cont = pic_malloc(pic, sizeof(struct pic_cont));   \
-    pic_save_point(pic, cont);                                          \
-    if (PIC_SETJMP(pic, cont->jmp.buf) == 0) {                          \
+    struct pic_cont cont;                                               \
+    pic_save_point(pic, &cont);                                         \
+    if (PIC_SETJMP(pic, cont.jmp) == 0) {                               \
       extern pic_value pic_native_exception_handler(pic_state *);       \
       struct pic_proc *handler;                                         \
       handler = pic_make_proc(pic, pic_native_exception_handler, "(native-exception-handler)"); \
-      pic_proc_env_set(pic, handler, "cont", pic_obj_value(pic_make_cont(pic, cont))); \
+      pic_proc_env_set(pic, handler, "cont", pic_obj_value(pic_make_cont(pic, &cont))); \
       do {                                                              \
         pic_push_handler(pic, handler);
 #define pic_catch_(label)                                 \
-        pic_pop_handler(pic);                             \
+  pic_pop_handler(pic);                                   \
       } while (0);                                        \
-      pic->jmp = pic->jmp->prev;                          \
+      pic->cc = pic->cc->prev;                            \
     } else {                                              \
-      pic->jmp = pic->jmp->prev;                          \
+      pic->cc = pic->cc->prev;                            \
       goto label;                                         \
     }                                                     \
   } while (0);                                            \

extlib/benz/state.c

@@ -172,8 +172,8 @@ pic_open(int argc, char *argv[], char **envp, pic_allocf allocf)
   /* turn off GC */
   pic->gc_enable = false;
 
-  /* jmp */
-  pic->jmp = NULL;
+  /* continuation chain */
+  pic->cc = NULL;
 
   /* root block */
   pic->cp = NULL;