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source: code/trunk/src/libraries/core/command/TclThreadManager.cc @ 10365

Last change on this file since 10365 was 8858, checked in by landauf, 13 years ago

merged output branch back to trunk.

Changes:

  • you have to include util/Output.h instead of util/Debug.h
  • COUT(x) is now called orxout(level)
  • output levels are now defined by an enum instead of numbers. see util/Output.h for the definition
  • it's possible to use output contexts with orxout(level, context). see util/Output.h for some common contexts. you can define more contexts
  • you must use 'endl' at the end of an output message, '\n' does not flush the message

Output levels:

  • instead of COUT(0) use orxout()
  • instead of COUT(1) use orxout(user_error) or orxout(internal_error)
  • instead of COUT(2) use orxout(user_warning) or orxout(internal_warning)
  • instead of COUT(3) use orxout(user_status/user_info) or orxout(internal_status/internal_info)
  • instead of COUT(4) use orxout(verbose)
  • instead of COUT(5) use orxout(verbose_more)
  • instead of COUT(6) use orxout(verbose_ultra)

Guidelines:

  • user_* levels are for the user, visible in the console and the log-file
  • internal_* levels are for developers, visible in the log-file
  • verbose_* levels are for debugging, only visible if the context of the output is activated

Usage in C++:

  • orxout() << "message" << endl;
  • orxout(level) << "message" << endl;
  • orxout(level, context) << "message" << endl;

Usage in Lua:

  • orxout("message")
  • orxout(orxonox.level.levelname, "message")
  • orxout(orxonox.level.levelname, "context", "message")

Usage in Tcl (and in the in-game-console):

  • orxout levelname message
  • orxout_context levelname context message
  • shortcuts: log message, error message, warning message, status message, info message, debug message
  • Property svn:eol-style set to native
File size: 28.6 KB
Line 
1/*
2 *   ORXONOX - the hottest 3D action shooter ever to exist
3 *                    > www.orxonox.net <
4 *
5 *
6 *   License notice:
7 *
8 *   This program is free software; you can redistribute it and/or
9 *   modify it under the terms of the GNU General Public License
10 *   as published by the Free Software Foundation; either version 2
11 *   of the License, or (at your option) any later version.
12 *
13 *   This program is distributed in the hope that it will be useful,
14 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
15 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 *   GNU General Public License for more details.
17 *
18 *   You should have received a copy of the GNU General Public License
19 *   along with this program; if not, write to the Free Software
20 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
21 *
22 *   Author:
23 *      Fabian 'x3n' Landau
24 *   Co-authors:
25 *      ...
26 *
27 */
28
29/**
30    @file
31    @brief Implementation of TclThreadManager.
32*/
33
34#include "TclThreadManager.h"
35
36#include <boost/bind.hpp>
37#include <boost/thread/thread.hpp>
38#include <boost/thread/locks.hpp>
39#include <boost/thread/shared_mutex.hpp>
40#include <OgreTimer.h>
41#include <cpptcl/cpptcl.h>
42
43#include "util/Clock.h"
44#include "util/Convert.h"
45#include "util/Exception.h"
46#include "util/StringUtils.h"
47#include "core/CoreIncludes.h"
48#include "CommandExecutor.h"
49#include "ConsoleCommand.h"
50#include "TclBind.h"
51#include "TclThreadList.h"
52
53namespace orxonox
54{
55    const float TCLTHREADMANAGER_MAX_CPU_USAGE = 0.50f;
56
57    SetConsoleCommand("TclThreadManager", "create",  &TclThreadManager::create);
58    SetConsoleCommand("TclThreadManager", "destroy", &TclThreadManager::destroy).argumentCompleter(0, autocompletion::tclthreads());
59    SetConsoleCommand("TclThreadManager", "execute", &TclThreadManager::execute).argumentCompleter(0, autocompletion::tclthreads());
60    SetConsoleCommand("TclThreadManager", "query",   &TclThreadManager::query  ).argumentCompleter(0, autocompletion::tclthreads());
61    SetConsoleCommand("TclThreadManager", "source",  &TclThreadManager::source ).argumentCompleter(0, autocompletion::tclthreads());
62
63    /**
64        @brief A struct containing all information about a Tcl-interpreter
65    */
66    struct TclInterpreterBundle
67    {
68        TclInterpreterBundle()
69        {
70            this->lock_ = new boost::unique_lock<boost::mutex>(this->mutex_, boost::defer_lock);
71            this->bRunning_ = true;
72        }
73
74        ~TclInterpreterBundle()
75        {
76            delete this->lock_;
77        }
78
79        unsigned int                      id_;             ///< The id of the interpreter
80        Tcl::interpreter*                 interpreter_;    ///< The Tcl-interpreter
81        boost::mutex                      mutex_;          ///< A mutex to lock the interpreter while it's being used
82        boost::unique_lock<boost::mutex>* lock_;           ///< The corresponding lock for the mutex
83        TclThreadList<std::string>        queue_;          ///< The command queue for commands passed by execute(command)
84        TclThreadList<unsigned int>       queriers_;       ///< A list containing the id's of all other threads sending a query to this interpreter (to avoid circular queries and deadlocks)
85        bool                              bRunning_;       ///< This variable stays true until destroy() gets called
86    };
87
88    TclThreadManager* TclThreadManager::singletonPtr_s = 0;
89
90    /**
91        @brief Constructor
92        @param interpreter A pointer to the standard Tcl-interpreter (see @ref TclBind)
93    */
94    TclThreadManager::TclThreadManager(Tcl::interpreter* interpreter)
95    {
96        this->numInterpreterBundles_ = 0;
97
98        this->interpreterBundlesMutex_ = new boost::shared_mutex();
99        this->mainInterpreterMutex_ = new boost::mutex();
100        this->messageQueue_ = new TclThreadList<std::string>();
101
102        TclInterpreterBundle* newbundle = new TclInterpreterBundle();
103        newbundle->id_ = 0;
104        newbundle->interpreter_ = interpreter;
105        newbundle->lock_->lock();
106
107        {
108            boost::unique_lock<boost::shared_mutex> lock(*this->interpreterBundlesMutex_);
109            this->interpreterBundles_[0] = newbundle;
110        }
111    }
112
113    /**
114        @brief Destructor
115    */
116    TclThreadManager::~TclThreadManager()
117    {
118        delete this->interpreterBundles_[0];
119        delete this->interpreterBundlesMutex_;
120//        delete this->mainInterpreterMutex_; // <-- temporarily disabled to avoid crash if a thread is still actively querying
121        delete this->messageQueue_;
122    }
123
124    /**
125        @brief The "main loop" of the TclThreadManager. Creates new threads if needed and handles queries and queued commands for the main interpreter.
126    */
127    void TclThreadManager::preUpdate(const Clock& time)
128    {
129        // Get the bundle of the main interpreter (0)
130        TclInterpreterBundle* bundle = this->getInterpreterBundle(0);
131        if (bundle)
132        {
133            // Unlock the mutex to allow other threads accessing the main interpreter
134            bundle->lock_->unlock();
135
136            // Lock the main interpreter mutex once to synchronize with threads that want to query the main interpreter
137            {
138                boost::unique_lock<boost::mutex> lock(*this->mainInterpreterMutex_);
139            }
140
141            // Lock the mutex again to gain exclusive access to the interpreter for the rest of the mainloop
142            bundle->lock_->lock();
143
144            // Execute commands in the queues of the threaded interpreters
145            {
146                boost::shared_lock<boost::shared_mutex> lock(*this->interpreterBundlesMutex_);
147                for (std::map<unsigned int, TclInterpreterBundle*>::const_iterator it = this->interpreterBundles_.begin(); it != this->interpreterBundles_.end(); ++it)
148                {
149                    if (it->first == 0)
150                        continue; // We'll handle the default interpreter later (and without threads of course)
151
152                    TclInterpreterBundle* bundle = it->second;
153                    if (!bundle->queue_.empty())
154                    {
155                        // There are commands in the queue
156                        try
157                        {
158                            if (!bundle->lock_->owns_lock() && bundle->lock_->try_lock())
159                            {
160                                // We sucessfully obtained a lock for the interpreter
161                                std::string command;
162                                if (bundle->queue_.try_pop_front(&command))
163                                {
164                                    // Start a thread to execute the command
165                                    boost::thread(boost::bind(&tclThread, bundle, command));
166                                }
167                                else
168                                {
169                                    // Somehow the queue become empty (maybe multiple consumers) - unlock the mutex
170                                    bundle->lock_->unlock();
171                                }
172                            }
173                        }
174                        catch (...)
175                        {
176                            // A lock error occurred - this is possible if the lock gets locked between !bundle->lock_->owns_lock() and bundle->lock_->try_lock()
177                            // This isn't too bad, just continue
178                        }
179                    }
180                }
181            }
182
183            // Execute commands in the message queue
184            if (!this->messageQueue_->empty())
185            {
186                std::string command;
187                while (true)
188                {
189                    // Pop the front value from the list (break the loop if there are no elements in the list)
190                    if (!this->messageQueue_->try_pop_front(&command))
191                        break;
192
193                    // Execute the command
194                    CommandExecutor::execute(command, false);
195                }
196            }
197
198            // Execute commands in the queue of the main interpreter
199            if (!bundle->queue_.empty())
200            {
201                // Calculate the time we have until we reach the maximal cpu usage
202                unsigned long maxtime = (unsigned long)(time.getDeltaTime() * 1000000 * TCLTHREADMANAGER_MAX_CPU_USAGE);
203
204                Ogre::Timer timer;
205                std::string command;
206
207                while (timer.getMicroseconds() < maxtime)
208                {
209                    // Pop the front value from the list (break the loop if there are no elements in the list)
210                    if (!bundle->queue_.try_pop_front(&command))
211                        break;
212
213                    // Execute the command
214                    CommandExecutor::execute(command, false);
215                }
216            }
217        }
218    }
219
220    /**
221        @brief Creates a new Tcl-interpreter.
222    */
223    unsigned int TclThreadManager::create()
224    {
225        TclThreadManager::getInstance().numInterpreterBundles_++;
226        TclThreadManager::createWithId(TclThreadManager::getInstance().numInterpreterBundles_);
227        orxout(user_info) << "Created new Tcl-interpreter with ID " << TclThreadManager::getInstance().numInterpreterBundles_ << endl;
228        return TclThreadManager::getInstance().numInterpreterBundles_;
229    }
230
231    /**
232        @brief Creates a new Tcl-interpreter with a given id.
233
234        Use with caution - if the id collides with an already existing interpreter, this call will fail.
235        This will also be a problem, if the auto-numbered interpreters (by using create()) reach an id
236        which was previously used in this function. Use high numbers to be safe.
237    */
238    Tcl::interpreter* TclThreadManager::createWithId(unsigned int id)
239    {
240        TclInterpreterBundle* newbundle = new TclInterpreterBundle();
241        newbundle->id_ = id;
242        newbundle->interpreter_ = TclBind::createTclInterpreter();
243
244        TclThreadManager::initialize(newbundle);
245
246        {
247            // Add the new bundle to the map
248            boost::unique_lock<boost::shared_mutex> lock(*TclThreadManager::getInstance().interpreterBundlesMutex_);
249            TclThreadManager::getInstance().interpreterBundles_[id] = newbundle;
250        }
251
252        return newbundle->interpreter_;
253    }
254
255    void TclThreadManager::initialize(TclInterpreterBundle* bundle)
256    {
257        const std::string& id_string = multi_cast<std::string>(bundle->id_);
258
259        // Initialize the new interpreter
260        try
261        {
262            // Define the functions which are implemented in C++
263            bundle->interpreter_->def("::orxonox::execute",      TclThreadManager::tcl_execute,      Tcl::variadic());
264            bundle->interpreter_->def("::orxonox::crossexecute", TclThreadManager::tcl_crossexecute, Tcl::variadic());
265            bundle->interpreter_->def("::orxonox::query",        TclThreadManager::tcl_query,        Tcl::variadic());
266            bundle->interpreter_->def("::orxonox::crossquery",   TclThreadManager::tcl_crossquery,   Tcl::variadic());
267            bundle->interpreter_->def("::orxonox::running",      TclThreadManager::tcl_running);
268
269            // Create threadspecific shortcuts for the functions above
270            bundle->interpreter_->def("execute",      TclThreadManager::tcl_execute,      Tcl::variadic());
271            bundle->interpreter_->def("crossexecute", TclThreadManager::tcl_crossexecute, Tcl::variadic());
272            bundle->interpreter_->eval("proc query      {args}    { ::orxonox::query " + id_string + " $args }");
273            bundle->interpreter_->eval("proc crossquery {id args} { ::orxonox::crossquery " + id_string + " $id $args }");
274            bundle->interpreter_->eval("proc running    {}        { return [::orxonox::running " + id_string + "] }");
275
276            // Define a variable containing the thread id
277            bundle->interpreter_->eval("set id " + id_string);
278
279            // Use our own exit function to avoid shutting down the whole program instead of just the interpreter
280            bundle->interpreter_->eval("rename exit ::tcl::exit");
281            bundle->interpreter_->eval("proc exit {} { execute TclThreadManager destroy " + id_string + " }");
282
283            // Redefine some native functions
284            bundle->interpreter_->eval("rename while ::tcl::while");
285            bundle->interpreter_->eval("rename ::orxonox::while while");
286            bundle->interpreter_->eval("rename for ::tcl::for");
287            bundle->interpreter_->eval("rename ::orxonox::for for");
288        }
289        catch (const Tcl::tcl_error& e)
290        {
291            bundle->interpreter_ = 0;
292            orxout(user_error, context::tcl) << "Tcl error while creating Tcl-interpreter (" << id_string << "): " << e.what() << endl;
293        }
294    }
295
296    /**
297        @brief Stops and destroys a given Tcl-interpreter
298    */
299    void TclThreadManager::destroy(unsigned int id)
300    {
301        // TODO
302        // Not yet implemented
303        TclInterpreterBundle* bundle = TclThreadManager::getInstance().getInterpreterBundle(id);
304        if (bundle)
305        {
306            bundle->bRunning_ = false;
307        }
308    }
309
310    /**
311        @brief Sends a command to the queue of a given Tcl-interpreter
312        @param target_id The id of the target interpreter
313        @param command The command to be sent
314    */
315    void TclThreadManager::execute(unsigned int target_id, const std::string& command)
316    {
317        TclThreadManager::getInstance()._execute(target_id, command);
318    }
319
320    /**
321        @brief This function can be called from Tcl to execute a console command.
322
323        Commands which shall be executed are put into a queue and processed as soon as the
324        main thread feels ready to do so. The queue may also be full which results in a temporary
325        suspension of the calling thread until the queue gets ready again.
326    */
327    void TclThreadManager::tcl_execute(const Tcl::object& args)
328    {
329        TclThreadManager::getInstance()._execute(0, stripEnclosingBraces(args.get()));
330    }
331
332    /**
333        @brief This function can be called from Tcl to send a command to the queue of any interpreter.
334        @param target_id The id of the target thread
335        @param args Contains the content of the command
336    */
337    void TclThreadManager::tcl_crossexecute(int target_id, const Tcl::object& args)
338    {
339        TclThreadManager::getInstance()._execute(static_cast<unsigned int>(target_id), stripEnclosingBraces(args.get()));
340    }
341
342    /**
343        @brief Sends a command to the queue of a given Tcl-interpreter
344        @param target_id The id of the target interpreter
345        @param command The command to be sent
346    */
347    void TclThreadManager::_execute(unsigned int target_id, const std::string& command)
348    {
349        TclInterpreterBundle* bundle = this->getInterpreterBundle(target_id);
350        if (bundle)
351            bundle->queue_.push_back(command);
352    }
353
354
355    /**
356        @brief Sends a query to a given Tcl-interpreter and waits for the result
357        @param target_id The id of the target interpreter
358        @param command The command to be sent
359        @return The result of the command
360    */
361    std::string TclThreadManager::query(unsigned int target_id, const std::string& command)
362    {
363        return TclThreadManager::getInstance()._query(0, target_id, command);
364    }
365
366    /**
367        @brief This function can be called from Tcl to send a query to the main thread.
368        @param source_id The id of the calling thread
369        @param args Contains the content of the query
370
371        A query waits for the result of the command. This means, the calling thread will be blocked until
372        the main thread answers the query. In return, the main thread sends the result of the console
373        command back to Tcl.
374    */
375    std::string TclThreadManager::tcl_query(int source_id, const Tcl::object& args)
376    {
377        return TclThreadManager::getInstance()._query(static_cast<unsigned int>(source_id), 0, stripEnclosingBraces(args.get()), true);
378    }
379
380    /**
381        @brief This function can be called from Tcl to send a query to another thread.
382        @param source_id The id of the calling thread
383        @param target_id The id of the target thread
384        @param args Contains the content of the query
385    */
386    std::string TclThreadManager::tcl_crossquery(int source_id, int target_id, const Tcl::object& args)
387    {
388        return TclThreadManager::getInstance()._query(static_cast<unsigned int>(source_id), static_cast<unsigned int>(target_id), stripEnclosingBraces(args.get()));
389    }
390
391    /**
392        @brief This function performs a query to any Tcl interpreter
393        @param source_id The id of the calling thread
394        @param target_id The id of the target thread
395        @param command The command to send as a query
396        @param bUseCommandExecutor Only used if the target_id is 0 (which references the main interpreter). In this case it means if the command should be passed to the CommandExecutor (true) or to the main Tcl interpreter (false). This is true when called by tcl_query() and false when called by tcl_crossquery().
397    */
398    std::string TclThreadManager::_query(unsigned int source_id, unsigned int target_id, const std::string& command, bool bUseCommandExecutor)
399    {
400        TclInterpreterBundle* source_bundle = this->getInterpreterBundle(source_id);
401        TclInterpreterBundle* target_bundle = this->getInterpreterBundle(target_id);
402        std::string output;
403
404        if (source_bundle && target_bundle)
405        {
406            // At this point we assume the mutex of source_bundle to be locked (because it's executing this query right now an waits for the return value)
407            // We can safely use it's querier list (because there's no other place in the code using the list except this query - and the interpreter can't start more than one query)
408
409            if ((source_bundle->id_ == target_bundle->id_) || source_bundle->queriers_.is_in(target_bundle->id_))
410            {
411                // This query would lead to a deadlock - return with an error
412                TclThreadManager::error("Circular query (" + this->dumpList(source_bundle->queriers_.getList()) + ' ' + multi_cast<std::string>(source_bundle->id_) \
413                            + " -> " + multi_cast<std::string>(target_bundle->id_) \
414                            + "), couldn't query Tcl-interpreter with ID " + multi_cast<std::string>(target_bundle->id_) \
415                            + " from other interpreter with ID " + multi_cast<std::string>(source_bundle->id_) + '.');
416            }
417            else
418            {
419                boost::unique_lock<boost::mutex> lock(target_bundle->mutex_, boost::try_to_lock);
420                boost::unique_lock<boost::mutex> mainlock(*this->mainInterpreterMutex_, boost::defer_lock);
421
422                if (!lock.owns_lock() && source_bundle->id_ != 0)
423                {
424                    // We couldn't obtain the try_lock immediately and we're not the main interpreter - wait until the lock becomes possible (note: the main interpreter won't wait and instead returns an error - see below)
425                    if (target_bundle->id_ == 0)
426                    {
427                        // We're querying the main interpreter - use the main interpreter mutex to synchronize
428                        mainlock.lock();
429                        lock.lock();
430                    }
431                    else
432                    {
433                        // We're querying a threaded interpreter - no synchronization needed
434                        lock.lock();
435                    }
436                }
437
438                if (lock.owns_lock())
439                {
440                    // Now the mutex of target_bundle is also locked an we can update the querier list
441                    target_bundle->queriers_.insert(target_bundle->queriers_.getList().begin(), source_bundle->queriers_.getList().begin(), source_bundle->queriers_.getList().end());
442                    target_bundle->queriers_.push_back(source_bundle->id_);
443
444                    // Perform the query (note: this happens in the main thread because we need the returnvalue)
445                    if (target_bundle->id_ == 0 && bUseCommandExecutor)
446                    {
447                        // It's a query to the CommandExecutor
448                        TclThreadManager::debug("TclThread_query -> CE: " + command);
449                        int error;
450                        output = CommandExecutor::query(command, &error, false);
451                        if (error)
452                            TclThreadManager::error("Can't execute command \"" + command + "\", " + CommandExecutor::getErrorDescription(error) + ". (TclThreadManager)");
453                    }
454                    else
455                    {
456                        // It's a query to a Tcl interpreter
457                        TclThreadManager::debug("TclThread_query: " + command);
458
459                        output = TclThreadManager::eval(target_bundle, command, "query");
460                    }
461
462                    // Clear the queriers list of the target
463                    target_bundle->queriers_.clear();
464
465                    // Unlock the mutex of the target_bundle
466                    lock.unlock();
467
468                    // Finally unlock the main interpreter lock if necessary
469                    if (mainlock.owns_lock())
470                        mainlock.unlock();
471                }
472                else
473                {
474                    // This happens if the main thread tries to query a busy interpreter
475                    // To avoid a lock of the main thread, we simply don't proceed with the query in this case
476                    TclThreadManager::error("Couldn't query Tcl-interpreter with ID " + multi_cast<std::string>(target_bundle->id_) + ", interpreter is busy right now.");
477                }
478            }
479
480        }
481
482        return output;
483    }
484
485    /**
486        @brief Creates a non-interactive Tcl-interpreter which executes a file.
487    */
488    void TclThreadManager::source(const std::string& file)
489    {
490        boost::thread(boost::bind(&sourceThread, file));
491    }
492
493    /**
494        @brief This function can be called from Tcl to ask if the thread is still suposed to be running.
495        @param id The id of the thread in question
496    */
497    bool TclThreadManager::tcl_running(int id)
498    {
499        TclInterpreterBundle* bundle = TclThreadManager::getInstance().getInterpreterBundle(static_cast<unsigned int>(id));
500        if (bundle)
501            return bundle->bRunning_;
502        else
503            return false;
504    }
505
506    /**
507        @brief Returns the interpreter bundle with the given id.
508        @param id The id of the interpreter
509        @return The interpreter or 0 if the id doesn't exist
510    */
511    TclInterpreterBundle* TclThreadManager::getInterpreterBundle(unsigned int id)
512    {
513        boost::shared_lock<boost::shared_mutex> lock(*this->interpreterBundlesMutex_);
514
515        std::map<unsigned int, TclInterpreterBundle*>::const_iterator it = this->interpreterBundles_.find(id);
516        if (it != this->interpreterBundles_.end())
517        {
518            return it->second;
519        }
520        else
521        {
522            TclThreadManager::error("No Tcl-interpreter with ID " + multi_cast<std::string>(id) + " existing.");
523            return 0;
524        }
525    }
526
527    /**
528        @brief Returns a string containing all elements of a unsigned-integer-list separated by spaces.
529    */
530    std::string TclThreadManager::dumpList(const std::list<unsigned int>& list)
531    {
532        std::string output;
533        for (std::list<unsigned int>::const_iterator it = list.begin(); it != list.end(); ++it)
534        {
535            if (it != list.begin())
536                output += ' ';
537
538            output += multi_cast<std::string>(*it);
539        }
540        return output;
541    }
542
543    /**
544        @brief Returns a list with the numbers of all existing Tcl-interpreters.
545
546        This function is used by the auto completion function.
547    */
548    std::list<unsigned int> TclThreadManager::getThreadList() const
549    {
550        boost::shared_lock<boost::shared_mutex> lock(*this->interpreterBundlesMutex_);
551
552        std::list<unsigned int> threads;
553        for (std::map<unsigned int, TclInterpreterBundle*>::const_iterator it = this->interpreterBundles_.begin(); it != this->interpreterBundles_.end(); ++it)
554            if (it->first > 0 && it->first <= this->numInterpreterBundles_) // only list autonumbered interpreters (created with create()) - exclude the default interpreter 0 and all manually numbered interpreters)
555                threads.push_back(it->first);
556        return threads;
557    }
558
559    /**
560        @brief A helper function to print errors in a thread safe manner.
561    */
562    void TclThreadManager::error(const std::string& error)
563    {
564        TclThreadManager::getInstance().messageQueue_->push_back("error " + error);
565    }
566
567    /**
568        @brief A helper function to print debug information in a thread safe manner.
569    */
570    void TclThreadManager::debug(const std::string& error)
571    {
572        TclThreadManager::getInstance().messageQueue_->push_back("debug " + error);
573    }
574
575    /**
576        @brief Evaluates a Tcl command without throwing exceptions (which may rise problems on certain machines).
577        @return The Tcl return value
578
579        Errors are reported through the @ref error function.
580    */
581    std::string TclThreadManager::eval(TclInterpreterBundle* bundle, const std::string& command, const std::string& action)
582    {
583        Tcl_Interp* interpreter = bundle->interpreter_->get();
584        int cc = Tcl_Eval(interpreter, command.c_str());
585
586        Tcl::details::result result(interpreter);
587
588        if (cc != TCL_OK)
589        {
590            TclThreadManager::error("Tcl error (" + action + ", ID " + multi_cast<std::string>(bundle->id_) + "): " + static_cast<std::string>(result));
591            return "";
592        }
593        else
594        {
595            return result;
596        }
597    }
598
599    ////////////////
600    // The Thread //
601    ////////////////
602
603    /**
604        @brief The main function of the thread. Executes a Tcl command.
605        @param bundle The interpreter bundle containing all necessary variables
606        @param command the Command to execute
607    */
608    void tclThread(TclInterpreterBundle* bundle, const std::string& command)
609    {
610        TclThreadManager::debug("TclThread_execute: " + command);
611
612        TclThreadManager::eval(bundle, command, "execute");
613
614        bundle->lock_->unlock();
615    }
616
617    /**
618        @brief The main function of a non-interactive source thread. Executes the file.
619        @param file The name of the file that should be executed by the non-interactive interpreter.
620    */
621    void sourceThread(const std::string& file)
622    {
623        TclThreadManager::debug("TclThread_source: " + file);
624
625        // Prepare the command-line arguments
626        const int argc = 2;
627        char* argv[argc];
628        argv[0] = const_cast<char*>("tclthread");
629        argv[1] = const_cast<char*>(file.c_str());
630
631        // Start the Tcl-command Tcl_Main with the Tcl_OrxonoxAppInit hook
632        Tcl_Main(argc, argv, Tcl_OrxonoxAppInit);
633
634//        Tcl::object object(file);
635//        int cc = Tcl_FSEvalFile(bundle->interpreter_->get(), object.get_object());
636//        Tcl::details::result result(bundle->interpreter_->get());
637//        if (cc != TCL_OK)
638//            TclThreadManager::error("Tcl error (source, ID " + getConvertedValue<unsigned int, std::string>(bundle->id_) + "): " + static_cast<std::string>(result));
639//
640//        // Unlock the mutex
641//        bundle->lock_->unlock();
642    }
643
644    /**
645        @brief A tcl-init hook to inject the non-interactive Tcl-interpreter into the TclThreadManager.
646    */
647    int Tcl_OrxonoxAppInit(Tcl_Interp* interp)
648    {
649        // Create a new interpreter bundle
650        unsigned int id = TclThreadManager::create();
651        TclInterpreterBundle* bundle = TclThreadManager::getInstance().getInterpreterBundle(id);
652
653        // Replace the default interpreter in the bundle with the non-interactive one (passed as an argument to this function)
654        if (bundle->interpreter_)
655            delete bundle->interpreter_;
656        bundle->interpreter_ = new Tcl::interpreter(interp, true);
657
658        // Initialize the non-interactive interpreter (like in @ref TclBind::createTclInterpreter but exception safe)
659        const std::string& libpath = TclBind::getTclLibraryPath();
660        if (!libpath.empty())
661            TclThreadManager::eval(bundle, "set tcl_library \"" + libpath + '"', "source");
662        int cc = Tcl_Init(interp);
663        TclThreadManager::eval(bundle, "source \"" + TclBind::getInstance().getTclDataPath() + "/init.tcl\"", "source");
664
665        // Initialize the non-interactive interpreter also with the thread-specific stuff
666        TclThreadManager::initialize(bundle);
667
668        // Lock the mutex (this will be locked until the thread finishes - no chance to interact with the interpreter)
669        bundle->lock_->lock();
670
671        // Return to Tcl_Main
672        if (!bundle->interpreter_)
673            return TCL_ERROR;
674        else
675            return cc;
676    }
677}
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