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GuiFlexDA
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2003-02-14
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//--------------------------------------------------------------------------
//
// Copyright (c) 2002, Colin Granville
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or
// without modification, are permitted provided that the following
// conditions are met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials
// provided with the distribution.
//
// * The name Colin Granville may not be used to endorse or promote
// products derived from this software without specific prior
// written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
// OF THE POSSIBILITY OF SUCH DAMAGE.
//
//--------------------------------------------------------------------------
#ifndef GuiFlexDA_h
#define GuiFlexDA_h
#include "GuiFlex.h"
#include "GuiAtExit.h"
class GuiFlexDA : public GuiFlex, private GuiAtExit
{
public:
GuiFlexDA(const char *name, int *error_fd, int dynamic_size);
virtual ~GuiFlexDA();
virtual bool alloc(GuiFlexAnchor&,size_t n);
virtual bool free(GuiFlexAnchor&);
virtual size_t size(const GuiFlexAnchor&) const;
virtual bool extend(GuiFlexAnchor&,size_t new_size);
virtual bool midExtend(GuiFlexAnchor&,size_t at,int by);
virtual bool reanchor(GuiFlexAnchor& to, GuiFlexAnchor& from);
virtual bool setBudge(bool on);
virtual void saveHeapInfo(char* filename);
virtual bool compact();
virtual bool setDeferredCompaction(bool on);
virtual size_t availableMemory();
bool isOk() const {return base != 0;}
private:
struct Object
{
size_t size;
GuiFlexAnchor* anchor;
size_t capacity() {return ((size+3)&~3);}
};
char* base;
int number;
size_t top;
size_t end;
size_t maxSize;
virtual void atExit();
bool resize(size_t new_size);
Object* getObject(const GuiFlexAnchor&) const;
static void setAnchor(GuiFlexAnchor&,Object*);
void reanchor(Object* from);
Object* topObject();
Object* nextObject(Object*);
};
#endif