1 files changed, 75 insertions, 0 deletions
diff --git a/db/mork/src/morkYarn.h b/db/mork/src/morkYarn.h
new file mode 100644
index 0000000000..a5b38bbf38
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+++ b/db/mork/src/morkYarn.h
@@ -0,0 +1,75 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-  */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef _MORKYARN_
+#define _MORKYARN_ 1
+
+#ifndef _MORK_
+#include "mork.h"
+#endif
+
+//3456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789
+
+
+#define morkDerived_kYarn     /*i*/ 0x7952 /* ascii 'yR' */
+
+/*| morkYarn: a reference counted nsIMdbYarn C struct.  This is for use in those
+**| few cases where single instances of reference counted buffers are needed
+**| in Mork, and we expect few enough instances that overhead is not a factor
+**| in decided whether to use such a thing.
+|*/
+class morkYarn : public morkNode { // refcounted yarn
+  
+// public: // slots inherited from morkNode (meant to inform only)
+  // nsIMdbHeap*       mNode_Heap;
+
+  // mork_base      mNode_Base;     // must equal morkBase_kNode
+  // mork_derived   mNode_Derived;  // depends on specific node subclass
+  
+  // mork_access    mNode_Access;   // kOpen, kClosing, kShut, or kDead
+  // mork_usage     mNode_Usage;    // kHeap, kStack, kMember, kGlobal, kNone
+  // mork_able      mNode_Mutable;  // can this node be modified?
+  // mork_load      mNode_Load;     // is this node clean or dirty?
+  
+  // mork_uses      mNode_Uses;     // refcount for strong refs
+  // mork_refs      mNode_Refs;     // refcount for strong refs + weak refs
+
+public: // state is public because the entire Mork system is private
+  mdbYarn  mYarn_Body;
+
+// { ===== begin morkNode interface =====
+public: // morkNode virtual methods
+  virtual void CloseMorkNode(morkEnv* ev) override; // CloseYarn() only if open
+  virtual ~morkYarn(); // assert that CloseYarn() executed earlier
+
+public: // morkYarn construction & destruction
+  morkYarn(morkEnv* ev, const morkUsage& inUsage, nsIMdbHeap* ioHeap);
+  void CloseYarn(morkEnv* ev); // called by CloseMorkNode();
+
+private: // copying is not allowed
+  morkYarn(const morkYarn& other);
+  morkYarn& operator=(const morkYarn& other);
+
+public: // dynamic type identification
+  mork_bool IsYarn() const
+  { return IsNode() && mNode_Derived == morkDerived_kYarn; }
+// } ===== end morkNode methods =====
+
+public: // typing
+  static void NonYarnTypeError(morkEnv* ev);
+
+public: // typesafe refcounting inlines calling inherited morkNode methods
+  static void SlotWeakYarn(morkYarn* me,
+    morkEnv* ev, morkYarn** ioSlot)
+  { morkNode::SlotWeakNode((morkNode*) me, ev, (morkNode**) ioSlot); }
+  
+  static void SlotStrongYarn(morkYarn* me,
+    morkEnv* ev, morkYarn** ioSlot)
+  { morkNode::SlotStrongNode((morkNode*) me, ev, (morkNode**) ioSlot); }
+};
+
+//3456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789
+
+#endif /* _MORKYARN_ */