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/********************* */
/*! \file portfolio_util.h
** \verbatim
** Top contributors (to current version):
** Morgan Deters, Kshitij Bansal, Tim King
** This file is part of the CVC4 project.
** Copyright (c) 2009-2019 by the authors listed in the file AUTHORS
** in the top-level source directory) and their institutional affiliations.
** All rights reserved. See the file COPYING in the top-level source
** directory for licensing information.\endverbatim
**
** \brief Code relevant only for portfolio builds
**/
#ifndef __CVC4__PORTFOLIO_UTIL_H
#define __CVC4__PORTFOLIO_UTIL_H
#include <queue>
#include "base/output.h"
#include "expr/pickler.h"
#include "smt/smt_engine.h"
#include "smt_util/lemma_input_channel.h"
#include "smt_util/lemma_output_channel.h"
#include "util/channel.h"
namespace CVC4 {
typedef expr::pickle::Pickle ChannelFormat;
class PortfolioLemmaOutputChannel : public LemmaOutputChannel {
private:
std::string d_tag;
SharedChannel<ChannelFormat>* d_sharedChannel;
expr::pickle::MapPickler d_pickler;
public:
int cnt;
PortfolioLemmaOutputChannel(std::string tag,
SharedChannel<ChannelFormat> *c,
ExprManager* em,
VarMap& to,
VarMap& from) :
d_tag(tag),
d_sharedChannel(c),
d_pickler(em, to, from),
cnt(0)
{}
~PortfolioLemmaOutputChannel() {}
void notifyNewLemma(Expr lemma) override;
};/* class PortfolioLemmaOutputChannel */
class PortfolioLemmaInputChannel : public LemmaInputChannel {
private:
std::string d_tag;
SharedChannel<ChannelFormat>* d_sharedChannel;
expr::pickle::MapPickler d_pickler;
public:
PortfolioLemmaInputChannel(std::string tag,
SharedChannel<ChannelFormat>* c,
ExprManager* em,
VarMap& to,
VarMap& from);
~PortfolioLemmaInputChannel() {}
bool hasNewLemma() override;
Expr getNewLemma() override;
};/* class PortfolioLemmaInputChannel */
class OptionsList {
public:
OptionsList();
~OptionsList();
void push_back_copy(const Options& options);
Options& operator[](size_t position);
const Options& operator[](size_t position) const;
Options& back();
size_t size() const;
private:
OptionsList(const OptionsList&) = delete;
OptionsList& operator=(const OptionsList&) = delete;
std::vector<Options*> d_options;
};
void parseThreadSpecificOptions(OptionsList& list, const Options& opts);
template<typename T>
void sharingManager(unsigned numThreads,
SharedChannel<T> *channelsOut[], // out and in with respect
SharedChannel<T> *channelsIn[],
SmtEngine *smts[]) // to smt engines
{
Trace("sharing") << "sharing: thread started " << std::endl;
std::vector <int> cnt(numThreads); // Debug("sharing")
std::vector< std::queue<T> > queues;
for(unsigned i = 0; i < numThreads; ++i){
queues.push_back(std::queue<T>());
}
const unsigned int sharingBroadcastInterval = 1;
boost::mutex mutex_activity;
/* Disable interruption, so that we can check manually */
boost::this_thread::disable_interruption di;
while(not boost::this_thread::interruption_requested()) {
boost::this_thread::sleep
(boost::posix_time::milliseconds(sharingBroadcastInterval));
for(unsigned t = 0; t < numThreads; ++t) {
/* No activity on this channel */
if(channelsOut[t]->empty()) continue;
/* Alert if channel full, so that we increase sharingChannelSize
or decrease sharingBroadcastInterval */
assert(not channelsOut[t]->full());
T data = channelsOut[t]->pop();
if(Trace.isOn("sharing")) {
++cnt[t];
Trace("sharing") << "sharing: Got data. Thread #" << t
<< ". Chunk " << cnt[t] << std::endl;
}
for(unsigned u = 0; u < numThreads; ++u) {
if(u != t){
Trace("sharing") << "sharing: adding to queue " << u << std::endl;
queues[u].push(data);
}
}/* end of inner for: broadcast activity */
} /* end of outer for: look for activity */
for(unsigned t = 0; t < numThreads; ++t){
/* Alert if channel full, so that we increase sharingChannelSize
or decrease sharingBroadcastInterval */
assert(not channelsIn[t]->full());
while(!queues[t].empty() && !channelsIn[t]->full()){
Trace("sharing") << "sharing: pushing on channel " << t << std::endl;
T data = queues[t].front();
channelsIn[t]->push(data);
queues[t].pop();
}
}
} /* end of infinite while */
Trace("interrupt")
<< "sharing thread interrupted, interrupting all smtEngines" << std::endl;
for(unsigned t = 0; t < numThreads; ++t) {
Trace("interrupt") << "Interrupting thread #" << t << std::endl;
try{
smts[t]->interrupt();
}catch(ModalException &e){
// It's fine, the thread is probably not there.
Trace("interrupt") << "Could not interrupt thread #" << t << std::endl;
}
}
Trace("sharing") << "sharing: Interrupted, exiting." << std::endl;
}/* sharingManager() */
}/* CVC4 namespace */
#endif /* __CVC4__PORTFOLIO_UTIL_H */
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