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Essentially Lars' "thread safe" patch

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git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@3183 a592a061-630c-0410-9148-cb99ea01b6c8
This commit is contained in:
André Pönitz 2001-12-11 07:38:02 +00:00
parent 7aebbe6e10
commit c9541eeeab
2 changed files with 31 additions and 48 deletions
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49
src/mathed/math_atom.C
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@ -1,15 +1,12 @@
/*
* File: math_inset.C
* Purpose: Implementation of insets for mathed
* Author: Alejandro Aguilar Sierra <asierra@servidor.unam.mx>
* Created: January 1996
* Description:
* File: math_atom.C
* Purpose: Wrapper for MathInset *
* Author: André Pönitz
* Created: July 2001
*
* Dependencies: Xlib, XForms
* Copyright: 2001 The LyX team
*
* Copyright: 1996, 1997 Alejandro Aguilar Sierra
*
* Version: 0.8beta.
* Version: 1.2.0
*
* You are free to use and modify this code under the terms of
* the GNU General Public Licence version 2 or later.
@ -23,6 +20,7 @@
#include "math_inset.h"
#include "support/LAssert.h"
#include <utility>
MathAtom::MathAtom()
: nucleus_(0)
@ -35,46 +33,31 @@ MathAtom::MathAtom(MathInset * p)
MathAtom::MathAtom(MathAtom const & p)
{
copy(p);
}
: nucleus_(p.nucleus_ ? p.nucleus_->clone() : 0)
{}
void MathAtom::operator=(MathAtom const & p)
{
if (this == &p)
if (&p == this)
return;
done();
copy(p);
MathAtom tmp(p);
std::swap(tmp.nucleus_, nucleus_);
}
MathAtom::~MathAtom()
{
done();
delete nucleus_;
}
void MathAtom::reset(MathInset * p)
{
done();
nucleus_ = p;
}
void MathAtom::done()
{
if (p == nucleus_)
return;
delete nucleus_;
}
void MathAtom::copy(MathAtom const & p)
{
//cerr << "calling MathAtom::copy\n";
nucleus_ = p.nucleus_;
if (nucleus_)
nucleus_ = nucleus_->clone();
nucleus_ = p;
}

30
src/mathed/math_atom.h
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@ -22,6 +22,10 @@ Ok: Implementing it thusly is not feasible since cursor movement gets
hackish. We use MathAtom only as a wrapper around MathInset * with value
semantics.
The MathAtom owns the MathInset * and is responsible for proper cloning and
destruction. Every MathInset * should be put into a MathAtom after its
creation as soon as possible.
Andre'
*/
@ -30,31 +34,27 @@ class MathInset;
class MathAtom {
public:
///
/// default constructor, object is useless, but we need it to put it into
// std::containers
MathAtom();
///
MathAtom(MathAtom const &);
///
/// the "real constructor"
explicit MathAtom(MathInset * p);
///
virtual ~MathAtom();
///
/// copy constructor, invokes nucleus_->clone()
MathAtom(MathAtom const &);
/// we really need to clean up
~MathAtom();
/// assignment invokes nucleus_->clone()
void operator=(MathAtom const &);
///
/// change inset under the hood
void reset(MathInset * p);
///
/// access to the inset
MathInset * nucleus() const;
///
/// access to the inset
MathInset * operator->() const;
private:
///
MathInset * nucleus_;
/// raw copy
void copy(MathAtom const & p);
/// raw destruction
void done();
};
#endif