X-Git-Url: http://git.vpit.fr/?a=blobdiff_plain;f=reap.h;fp=reap.h;h=9073899088bc07fc2993ed92e1a3656a1af67adf;hb=daea523653756bb45d89c7b17bbc6ac70f37019d;hp=0000000000000000000000000000000000000000;hpb=120d12f635bf0ef0f334f463c455a0d2082db4e9;p=perl%2Fmodules%2Fautovivification.git

diff --git a/reap.h b/reap.h
new file mode 100644
index 0000000..9073899
--- /dev/null
+++ b/reap.h
@@ -0,0 +1,81 @@
+/* This file is part of the autovivification Perl module.
+ * See http://search.cpan.org/dist/autovivification/ */
+
+/* This header provides a specialized version of Scope::Upper::reap that can be
+ * called directly from XS.
+ * See http://search.cpan.org/dist/Scope-Upper/ for details. */
+
+#ifndef REAP_H
+#define REAP_H 1
+
+#define REAP_DESTRUCTOR_SIZE 3
+
+typedef struct {
+ I32    depth;
+ I32   *origin;
+ void (*cb)(pTHX_ void *);
+ void  *ud;
+ char  *dummy;
+} reap_ud;
+
+STATIC void reap_pop(pTHX_ void *);
+
+STATIC void reap_pop(pTHX_ void *ud_) {
+ reap_ud *ud = ud_;
+ I32 depth, *origin, mark, base;
+
+ depth  = ud->depth;
+ origin = ud->origin;
+ mark   = origin[depth];
+ base   = origin[depth - 1];
+
+ if (base < mark) {
+  PL_savestack_ix = mark;
+  leave_scope(base);
+ }
+ PL_savestack_ix = base;
+
+ if ((ud->depth = --depth) > 0) {
+  SAVEDESTRUCTOR_X(reap_pop, ud);
+ } else {
+  void (*cb)(pTHX_ void *) = ud->cb;
+  void  *cb_ud             = ud->ud;
+
+  PerlMemShared_free(ud->origin);
+  PerlMemShared_free(ud);
+
+  SAVEDESTRUCTOR_X(cb, cb_ud);
+ }
+}
+
+STATIC void reap(pTHX_ I32 depth, void (*cb)(pTHX_ void *), void *cb_ud) {
+#define reap(D, CB, UD) reap(aTHX_ (D), (CB), (UD))
+ reap_ud *ud;
+ I32 i;
+
+ if (depth > PL_scopestack_ix)
+  depth = PL_scopestack_ix;
+
+ ud         = PerlMemShared_malloc(sizeof *ud);
+ ud->depth  = depth;
+ ud->origin = PerlMemShared_malloc((depth + 1) * sizeof *ud->origin);
+ ud->cb     = cb;
+ ud->ud     = cb_ud;
+ ud->dummy  = NULL;
+
+ for (i = depth; i >= 1; --i) {
+  I32 j = PL_scopestack_ix - i;
+  ud->origin[depth - i] = PL_scopestack[j];
+  PL_scopestack[j] += REAP_DESTRUCTOR_SIZE;
+ }
+ ud->origin[depth] = PL_savestack_ix;
+
+ while (PL_savestack_ix + REAP_DESTRUCTOR_SIZE
+                                       <= PL_scopestack[PL_scopestack_ix - 1]) {
+  save_pptr(&ud->dummy);
+ }
+
+ SAVEDESTRUCTOR_X(reap_pop, ud);
+}
+
+#endif /* REAP_H */