3 This file is part of libmspcore
4 Copyright © 2006 Mikko Rasa, Mikkosoft Productions
5 Distributed under the LGPL
9 #include "../debug/backtrace.h"
10 #include "../debug/demangle.h"
11 #include "../time/units.h"
12 #include "../time/utils.h"
13 #include "application.h"
21 Constructs an instance of the registered application class and runs it. If the
22 application throws a UsageError, the static usage() function is called.
24 This function can only be called once. The global main() function provided by
25 the library normally does it automatically at program startup.
27 int Application::run(int argc, char **argv)
29 static bool called=false;
32 cerr<<"Trying to call Application::run_app twice!\n";
39 cerr<<"Trying to run with no application class registered!\n";
47 app_=reg_app_->create_app(argc, argv);
49 catch(const UsageError &e)
51 reg_app_->usage(e.what(), argv[0], e.get_brief());
55 int result=app_->main();
59 catch(const exception &e)
61 cerr<<"An uncaught exception occurred.\n";
62 cerr<<" type: "<<Debug::demangle(typeid(e).name())<<'\n';
63 cerr<<" what(): "<<e.what()<<'\n';
65 const Exception *exc=dynamic_cast<const Exception *>(&e);
66 if(exc && !exc->get_backtrace().get_frames().empty())
68 cerr<<" backtrace:\n";
69 const Debug::Backtrace::FrameSeq &frames=exc->get_backtrace().get_frames();
70 for(Debug::Backtrace::FrameSeq::const_iterator i=frames.begin(); i!=frames.end(); ++i)
72 cerr<<" "<<i->address;
73 if(!i->symbol.empty())
74 cerr<<" in "<<i->symbol;
75 cerr<<" from "<<i->file<<'\n';
85 Prints a message describing the usage of the application. The default version
86 will blame the programmer for being lazy.
88 @param reason Why the function was called
89 @param argv0 The value of argv[0], to be used in the message
90 @param brief Whether to print a brief or long usage message
92 void Application::usage(const char *reason, const char *, bool)
95 cerr<<"UsageError: "<<reason<<'\n';
96 cerr<<"The programmer was lazy and didn't write a usage() function for this application.\n";
99 Application::Application():
101 loop_mode_(TICK_SLEEP)
105 Default main loop. Behavior depends on loop_mode_. A custom main loop should
106 monitor the done member variable and return exit_code.
108 int Application::main()
116 if(loop_mode_==SLEEP)
122 else if(loop_mode_==TICK_SLEEP)
125 Time::sleep(Time::msec);
127 else if(loop_mode_==TICK_YIELD)
136 else if(loop_mode_==TICK_BUSY)
144 Sets the specified signal to be delivered to the sighandler member function.
146 void Application::catch_signal(int s)
148 signal(s, &sighandler_);
152 Changes the main loop mode.
154 void Application::set_loop_mode(LoopMode l)
156 LoopMode old_mode=loop_mode_;
163 Causes the tick() function to be executed once if loop mode is SLEEP. Has no
164 effect with other loop modes.
166 void Application::induce_tick()
168 if(loop_mode_==SLEEP)
173 Causes the application to exit gracefully with the given exit code.
175 void Application::exit(int c)
179 if(loop_mode_==SLEEP)
184 Static wrapper function to call a member function of the Application instance.
186 void Application::sighandler_(int s)
191 Application::RegBase::RegBase()
195 cerr<<"Warning: registering the application twice\n";
202 Application *Application::app_=0;
203 Application::RegBase *Application::reg_app_=0;