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// Copyright (C) 2006-2014 David Sugar, Tycho Softworks.
// Copyright (C) 2015-2020 Cherokees of Idaho.
//
// This file is part of GNU uCommon C++.
//
// GNU uCommon C++ is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU uCommon C++ 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 for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with GNU uCommon C++. If not, see <http://www.gnu.org/licenses/>.
#include <ucommon-config.h>
#include <ucommon/export.h>
#include <ucommon/access.h>
namespace ucommon {
SharedProtocol::~SharedProtocol()
{
}
ExclusiveProtocol::~ExclusiveProtocol()
{
}
void SharedProtocol::exclusive(void)
{
}
void SharedProtocol::share(void)
{
}
SharedProtocol::Locking::Locking(SharedProtocol *obj)
{
assert(obj != NULL);
lock = obj;
modify = false;
state = 0;
lock->_share();
}
SharedProtocol::Locking::Locking(const Locking& copy)
{
assert(copy.modify == false);
lock = copy.lock;
modify = false;
state = 0;
if(lock)
lock->_share();
}
SharedProtocol::Locking& SharedProtocol::Locking::operator=(const Locking& copy)
{
assert(copy.modify == false);
release();
lock = copy.lock;
state = 0;
if(lock)
lock->_share();
return *this;
}
ExclusiveProtocol::Locking::Locking(ExclusiveProtocol *obj)
{
assert(obj != NULL);
lock = obj;
lock->_lock();
}
SharedProtocol::Locking::~Locking()
{
if(lock) {
if(modify)
lock->share();
lock->_unshare();
lock = NULL;
modify = false;
}
}
ExclusiveProtocol::Locking::~Locking()
{
if(lock) {
lock->_unlock();
lock = NULL;
}
}
void SharedProtocol::Locking::release()
{
if(lock) {
if(modify)
lock->share();
lock->_unshare();
lock = NULL;
modify = false;
}
}
void ExclusiveProtocol::Locking::release()
{
if(lock) {
lock->_unlock();
lock = NULL;
}
}
void SharedProtocol::Locking::exclusive(void)
{
if(lock && !modify) {
lock->exclusive();
modify = true;
}
}
void SharedProtocol::Locking::share(void)
{
if(lock && modify) {
lock->share();
modify = false;
}
}
} // namespace ucommon
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