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authorMatt A. Tobin <email@mattatobin.com>2019-11-03 00:17:46 -0400
committerMatt A. Tobin <email@mattatobin.com>2019-11-03 00:17:46 -0400
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Issue #1258 - Part 1: Import mailnews, ldap, and mork from comm-esr52.9.1
Diffstat (limited to 'db/mork/src/morkHandle.h')
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+/* -*- 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 _MORKHANDLE_
+#define _MORKHANDLE_ 1
+
+#ifndef _MORK_
+#include "mork.h"
+#endif
+
+#ifndef _MORKNODE_
+#include "morkNode.h"
+#endif
+
+#ifndef _MORKDEQUE_
+#include "morkDeque.h"
+#endif
+
+#ifndef _MORKPOOL_
+#include "morkPool.h"
+#endif
+
+//3456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789
+
+class morkPool;
+class morkObject;
+class morkFactory;
+
+#define morkDerived_kHandle /*i*/ 0x486E /* ascii 'Hn' */
+#define morkHandle_kTag 0x68416E44 /* ascii 'hAnD' */
+
+/*| morkHandle:
+|*/
+class morkHandle : public morkNode {
+
+// 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
+
+ mork_u4 mHandle_Tag; // must equal morkHandle_kTag
+ morkEnv* mHandle_Env; // pool that allocated this handle
+ morkHandleFace* mHandle_Face; // cookie from pool containing this
+ morkObject* mHandle_Object; // object this handle wraps for MDB API
+ mork_magic mHandle_Magic; // magic sig different in each subclass
+
+// { ===== begin morkNode interface =====
+public: // morkNode virtual methods
+ virtual void CloseMorkNode(morkEnv* ev) override; // CloseHandle() only if open
+ virtual ~morkHandle(); // assert that CloseHandle() executed earlier
+
+public: // morkHandle construction & destruction
+ morkHandle(morkEnv* ev, // note morkUsage is always morkUsage_kPool
+ morkHandleFace* ioFace, // must not be nil, cookie for this handle
+ morkObject* ioObject, // must not be nil, the object for this handle
+ mork_magic inMagic); // magic sig to denote specific subclass
+ void CloseHandle(morkEnv* ev); // called by CloseMorkNode();
+
+private: // copying is not allowed
+ morkHandle(const morkHandle& other);
+ morkHandle& operator=(const morkHandle& other);
+
+protected: // special case empty construction for morkHandleFrame
+ friend class morkHandleFrame;
+ morkHandle() { }
+
+public: // dynamic type identification
+ mork_bool IsHandle() const
+ { return IsNode() && mNode_Derived == morkDerived_kHandle; }
+// } ===== end morkNode methods =====
+
+public: // morkHandle memory management operators
+ void* operator new(size_t inSize, morkPool& ioPool, morkZone& ioZone, morkEnv* ev) CPP_THROW_NEW
+ { return ioPool.NewHandle(ev, inSize, &ioZone); }
+
+ void* operator new(size_t inSize, morkPool& ioPool, morkEnv* ev) CPP_THROW_NEW
+ { return ioPool.NewHandle(ev, inSize, (morkZone*) 0); }
+
+ void* operator new(size_t inSize, morkHandleFace* ioFace) CPP_THROW_NEW
+ { MORK_USED_1(inSize); return ioFace; }
+
+
+public: // other handle methods
+ mork_bool GoodHandleTag() const
+ { return mHandle_Tag == morkHandle_kTag; }
+
+ void NewBadMagicHandleError(morkEnv* ev, mork_magic inMagic) const;
+ void NewDownHandleError(morkEnv* ev) const;
+ void NilFactoryError(morkEnv* ev) const;
+ void NilHandleObjectError(morkEnv* ev) const;
+ void NonNodeObjectError(morkEnv* ev) const;
+ void NonOpenObjectError(morkEnv* ev) const;
+
+ morkObject* GetGoodHandleObject(morkEnv* ev,
+ mork_bool inMutable, mork_magic inMagicType, mork_bool inClosedOkay) const;
+
+public: // interface supporting mdbObject methods
+
+ morkEnv* CanUseHandle(nsIMdbEnv* mev, mork_bool inMutable,
+ mork_bool inClosedOkay, nsresult* outErr) const;
+
+ // { ----- begin mdbObject style methods -----
+ nsresult Handle_IsFrozenMdbObject(nsIMdbEnv* ev, mdb_bool* outIsReadonly);
+
+ nsresult Handle_GetMdbFactory(nsIMdbEnv* ev, nsIMdbFactory** acqFactory);
+ nsresult Handle_GetWeakRefCount(nsIMdbEnv* ev, mdb_count* outCount);
+ nsresult Handle_GetStrongRefCount(nsIMdbEnv* ev, mdb_count* outCount);
+
+ nsresult Handle_AddWeakRef(nsIMdbEnv* ev);
+ nsresult Handle_AddStrongRef(nsIMdbEnv* ev);
+
+ nsresult Handle_CutWeakRef(nsIMdbEnv* ev);
+ nsresult Handle_CutStrongRef(nsIMdbEnv* ev);
+
+ nsresult Handle_CloseMdbObject(nsIMdbEnv* ev);
+ nsresult Handle_IsOpenMdbObject(nsIMdbEnv* ev, mdb_bool* outOpen);
+ // } ----- end mdbObject style methods -----
+
+public: // typesafe refcounting inlines calling inherited morkNode methods
+ static void SlotWeakHandle(morkHandle* me,
+ morkEnv* ev, morkHandle** ioSlot)
+ { morkNode::SlotWeakNode((morkNode*) me, ev, (morkNode**) ioSlot); }
+
+ static void SlotStrongHandle(morkHandle* me,
+ morkEnv* ev, morkHandle** ioSlot)
+ { morkNode::SlotStrongNode((morkNode*) me, ev, (morkNode**) ioSlot); }
+};
+
+#define morkHandleFrame_kPadSlotCount 4
+
+/*| morkHandleFrame: an object format used for allocating and maintaining
+**| instances of morkHandle, with leading slots used to maintain this in a
+**| linked list, and following slots to provide extra footprint that might
+**| be needed by any morkHandle subclasses that include very little extra
+**| space (by virtue of the fact that each morkHandle subclass is expected
+**| to multiply inherit from another base class that has only abstact methods
+**| for space overhead related only to some vtable representation).
+|*/
+class morkHandleFrame {
+public:
+ morkLink mHandleFrame_Link; // list storage without trampling Handle
+ morkHandle mHandleFrame_Handle;
+ mork_ip mHandleFrame_Padding[ morkHandleFrame_kPadSlotCount ];
+
+public:
+ morkHandle* AsHandle() { return &mHandleFrame_Handle; }
+
+ morkHandleFrame() {} // actually, morkHandleFrame never gets constructed
+
+private: // copying is not allowed
+ morkHandleFrame(const morkHandleFrame& other);
+ morkHandleFrame& operator=(const morkHandleFrame& other);
+};
+
+#define morkHandleFrame_kHandleOffset \
+ mork_OffsetOf(morkHandleFrame,mHandleFrame_Handle)
+
+#define morkHandle_AsHandleFrame(h) ((h)->mHandle_Block , \
+ ((morkHandleFrame*) (((mork_u1*)(h)) - morkHandleFrame_kHandleOffset)))
+
+//3456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789
+
+#endif /* _MORKHANDLE_ */