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/*
* Copyright (C) 2003-2015 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "Page.hxx"
#include "util/Alloc.hxx"
#include <new>
#include <assert.h>
#include <string.h>
#include <stdlib.h>
Page *
Page::Create(size_t size)
{
void *p = xalloc(sizeof(Page) + size -
sizeof(Page::data));
return ::new(p) Page(size);
}
Page *
Page::Copy(const void *data, size_t size)
{
assert(data != nullptr);
Page *page = Create(size);
memcpy(page->data, data, size);
return page;
}
Page *
Page::Concat(const Page &a, const Page &b)
{
Page *page = Create(a.size + b.size);
memcpy(page->data, a.data, a.size);
memcpy(page->data + a.size, b.data, b.size);
return page;
}
bool
Page::Unref()
{
bool unused = ref.Decrement();
if (unused) {
this->Page::~Page();
free(this);
}
return unused;
}
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