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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_sal.hxx"
#ifdef WNT /* avoid 'std::bad_alloc' unresolved externals */
#define _CRTIMP
#define _NTSDK
#endif /* WNT */
#ifndef INCLUDED_ALGORITHM
#include <algorithm>
#define INCLUDED_ALGORITHM
#endif
#ifndef INCLUDED_NEW
#include <new>
#define INCLUDED_NEW
#endif
#ifndef INCLUDED_STRING_H
#include <string.h>
#define INCLUDED_STRING_H
#endif
#include <osl/diagnose.h>
#include <rtl/alloc.h>
using std::nothrow_t;
// =======================================================================
// AllocatorTraits
// =======================================================================
namespace
{
struct AllocatorTraits
{
typedef char const signature_type[8];
const signature_type & m_signature;
explicit AllocatorTraits (signature_type const & s) SAL_THROW(())
: m_signature (s)
{}
std::size_t size (std::size_t n) const SAL_THROW(())
{
n = std::max(n, std::size_t(1));
#if OSL_DEBUG_LEVEL > 0
n += sizeof(signature_type);
#endif /* OSL_DEBUG_LEVEL */
return n;
}
void* init (void * p) const SAL_THROW(())
{
#if OSL_DEBUG_LEVEL > 0
memcpy (p, m_signature, sizeof(signature_type));
p = static_cast<char*>(p) + sizeof(signature_type);
#endif /* OSL_DEBUG_LEVEL */
return p;
}
void* fini (void * p) const SAL_THROW(())
{
#if OSL_DEBUG_LEVEL > 0
p = static_cast<char*>(p) - sizeof(signature_type);
if (memcmp (p, m_signature, sizeof(signature_type)) != 0)
{
OSL_FAIL("operator delete mismatch");
}
#endif /* OSL_DEBUG_LEVEL */
return p;
}
};
// =======================================================================
struct VectorTraits : public AllocatorTraits
{
static const signature_type g_signature;
VectorTraits() SAL_THROW(())
: AllocatorTraits (g_signature)
{}
};
struct ScalarTraits : public AllocatorTraits
{
static const signature_type g_signature;
ScalarTraits() SAL_THROW(())
: AllocatorTraits (g_signature)
{}
};
const AllocatorTraits::signature_type VectorTraits::g_signature = "new[]()";
const AllocatorTraits::signature_type ScalarTraits::g_signature = "new() ";
} // anonymous namespace
// =======================================================================
// Allocator
// =======================================================================
static void default_handler (void)
{
// Multithreading race in 'std::set_new_handler()' call sequence below.
throw std::bad_alloc();
}
// =======================================================================
static void* allocate (
std::size_t n, AllocatorTraits const & rTraits)
SAL_THROW((std::bad_alloc))
{
n = rTraits.size (n);
for (;;)
{
void * p = rtl_allocateMemory (sal_Size(n));
if (p != 0)
return rTraits.init (p);
std::new_handler d = default_handler, f = std::set_new_handler (d);
if (f != d)
std::set_new_handler (f);
if (f == 0)
throw std::bad_alloc();
(*f)();
}
}
// =======================================================================
static void* allocate (
std::size_t n, AllocatorTraits const & rTraits, std::nothrow_t const &)
SAL_THROW(())
{
try
{
return allocate (n, rTraits);
}
catch (std::bad_alloc const &)
{
return (0);
}
}
// =======================================================================
static void deallocate (void * p, AllocatorTraits const & rTraits)
SAL_THROW(())
{
if (p)
{
rtl_freeMemory (rTraits.fini(p));
}
}
// =======================================================================
// T * p = new T; delete p;
// =======================================================================
void* SAL_CALL operator new (std::size_t n) throw (std::bad_alloc)
{
return allocate (n, ScalarTraits());
}
// =======================================================================
void SAL_CALL operator delete (void * p) throw ()
{
deallocate (p, ScalarTraits());
}
// =======================================================================
// T * p = new(nothrow) T; delete(nothrow) p;
// =======================================================================
void* SAL_CALL operator new (std::size_t n, std::nothrow_t const &) throw ()
{
return allocate (n, ScalarTraits(), nothrow_t());
}
// =======================================================================
void SAL_CALL operator delete (void * p, std::nothrow_t const &) throw ()
{
deallocate (p, ScalarTraits());
}
// =======================================================================
// T * p = new T[n]; delete[] p;
// =======================================================================
void* SAL_CALL operator new[] (std::size_t n) throw (std::bad_alloc)
{
return allocate (n, VectorTraits());
}
// =======================================================================
void SAL_CALL operator delete[] (void * p) throw ()
{
deallocate (p, VectorTraits());
}
// =======================================================================
// T * p = new(nothrow) T[n]; delete(nothrow)[] p;
// =======================================================================
void* SAL_CALL operator new[] (std::size_t n, std::nothrow_t const &) throw ()
{
return allocate (n, VectorTraits(), nothrow_t());
}
// =======================================================================
void SAL_CALL operator delete[] (void * p, std::nothrow_t const &) throw ()
{
deallocate (p, VectorTraits());
}
// =======================================================================
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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