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/*
* Interprocess.h, part of VCMI engine
*
* Authors: listed in file AUTHORS in main folder
*
* License: GNU General Public License v2.0 or later
* Full text of license available in license.txt file, in main folder
*
*/
#pragma once
#include <boost/interprocess/sync/scoped_lock.hpp>
#include <boost/interprocess/sync/interprocess_mutex.hpp>
#include <boost/interprocess/sync/interprocess_condition.hpp>
#include <boost/interprocess/mapped_region.hpp>
#include <boost/interprocess/shared_memory_object.hpp>
struct ServerReady
{
bool ready;
uint16_t port; //ui16?
boost::interprocess::interprocess_mutex mutex;
boost::interprocess::interprocess_condition cond;
ServerReady()
{
ready = false;
port = 0;
}
void waitTillReady()
{
boost::interprocess::scoped_lock<boost::interprocess::interprocess_mutex> slock(mutex);
while(!ready)
{
cond.wait(slock);
}
}
void setToReadyAndNotify(const uint16_t Port)
{
{
boost::unique_lock<boost::interprocess::interprocess_mutex> lock(mutex);
ready = true;
port = Port;
}
cond.notify_all();
}
};
struct SharedMemory
{
std::string name;
boost::interprocess::shared_memory_object smo;
boost::interprocess::mapped_region * mr;
ServerReady * sr;
SharedMemory(const std::string & Name, bool initialize = false)
: name(Name)
{
if(initialize)
{
//if the application has previously crashed, the memory may not have been removed. to avoid problems - try to destroy it
boost::interprocess::shared_memory_object::remove(name.c_str());
}
smo = boost::interprocess::shared_memory_object(boost::interprocess::open_or_create, name.c_str(), boost::interprocess::read_write);
smo.truncate(sizeof(ServerReady));
mr = new boost::interprocess::mapped_region(smo,boost::interprocess::read_write);
if(initialize)
sr = new(mr->get_address())ServerReady();
else
sr = reinterpret_cast<ServerReady*>(mr->get_address());
};
~SharedMemory()
{
delete mr;
boost::interprocess::shared_memory_object::remove(name.c_str());
}
};
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