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