-/* $Id$
-
-This file is part of libmspcore
-Copyright © 2006 Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
#include <signal.h>
-#include <iostream>
-#include <typeinfo>
-#include "../debug/backtrace.h"
-#include "../debug/demangle.h"
-#include "../time/units.h"
-#include "../time/utils.h"
+#include <msp/io/print.h>
#include "application.h"
-#include "except.h"
+#include "getopt.h"
using namespace std;
namespace Msp {
+Application *Application::app_ = 0;
+Application::Starter *Application::starter_ = 0;
+void *Application::data_ = 0;
+
Application::Application():
- exit_code(0),
- loop_mode_(TICK_SLEEP)
+ exit_code(0)
{ }
/**
Constructs an instance of the registered application class and runs it. If the
-application throws a UsageError, the static usage() function is called.
+application throws a usage_error, a help message is printed. The GetOpt class
+will throw such exceptions automatically in error conditions.
This function can only be called once. The global main() function provided by
the library normally does it automatically at program startup.
*/
int Application::run(int argc, char **argv, void *data)
{
- static bool called=false;
+ static bool called = false;
if(called)
{
- cerr<<"Trying to call Application::run_app twice!\n";
+ IO::cerr.write("Trying to call Application::run_app twice!\n");
return 125;
}
- called=true;
+ called = true;
- if(!reg_app_)
+ if(!starter_)
{
- cerr<<"Trying to run with no application class registered!\n";
+ IO::cerr.write("Trying to run with no RegisteredApplication class!\n");
return 126;
}
- data_=data;
+ data_ = data;
try
{
try
{
- app_=reg_app_->create_app(argc, argv);
+ app_ = starter_->create_app(argc, argv);
}
- catch(const UsageError &e)
+ catch(const usage_error &e)
{
- reg_app_->usage(e.what(), argv[0], e.get_brief());
+ IO::print(IO::cerr, "%s\n%s\n", e.what(), e.help());
return 1;
}
- int result=app_->main();
- delete app_;
+ int result = app_->main();
+ Application *a = app_;
+ app_ = 0;
+ delete a;
return result;
}
catch(const exception &e)
{
delete app_;
-#ifdef WIN32
- string msg=Debug::demangle(typeid(e).name())+":\n"+e.what();
- MessageBoxA(0, msg.c_str(), "Uncaught exception", MB_OK|MB_ICONERROR);
-#else
- cerr<<"An uncaught exception occurred.\n";
- cerr<<" type: "<<Debug::demangle(typeid(e).name())<<'\n';
- cerr<<" what(): "<<e.what()<<'\n';
-
- const Exception *exc=dynamic_cast<const Exception *>(&e);
- if(exc && !exc->get_backtrace().get_frames().empty())
- {
- cerr<<" backtrace:\n";
- const list<Debug::Backtrace::StackFrame> &frames=exc->get_backtrace().get_frames();
- for(list<Debug::Backtrace::StackFrame>::const_iterator i=frames.begin(); i!=frames.end(); ++i)
- cerr<<" "<<*i<<'\n';
- }
-#endif
+ display_exception(e);
return 124;
}
}
/**
-Prints a message describing the usage of the application. The default version
-will blame the programmer for being lazy.
-
-@param reason Why the function was called
-@param argv0 The value of argv[0], to be used in the message
-@param brief Whether to print a brief or long usage message
-*/
-void Application::usage(const char *reason, const char *, bool)
-{
- if(reason)
- cerr<<"UsageError: "<<reason<<'\n';
- cerr<<"The programmer was lazy and didn't write a usage() function for this application.\n";
-}
-
-/**
-Default main loop. Behavior depends on loop_mode_. A custom main loop should
-monitor the done member variable and return exit_code.
+Default main loop. Calls tick() repeatedly until exit() is called. A custom
+main loop should monitor the done member variable and return exit_code.
*/
int Application::main()
{
- if(loop_mode_==NONE)
- return 0;
-
- done=false;
+ done = false;
while(!done)
- {
- if(loop_mode_==SLEEP)
- {
- sleep_sem_.wait();
- if(!done)
- tick();
- }
- else if(loop_mode_==TICK_SLEEP)
- {
- tick();
- Time::sleep(Time::msec);
- }
- else if(loop_mode_==TICK_YIELD)
- {
- tick();
-#ifdef WIN32
- Sleep(0);
-#else
- sched_yield();
-#endif
- }
- else if(loop_mode_==TICK_BUSY)
- tick();
- }
+ tick();
return exit_code;
}
signal(s, &sighandler_);
}
-/**
-Changes the main loop mode.
-*/
-void Application::set_loop_mode(LoopMode l)
-{
- LoopMode old_mode=loop_mode_;
- loop_mode_=l;
- if(old_mode==SLEEP)
- sleep_sem_.signal();
-}
-
-/**
-Causes the tick() function to be executed once if loop mode is SLEEP. Has no
-effect with other loop modes.
-*/
-void Application::induce_tick()
-{
- if(loop_mode_==SLEEP)
- sleep_sem_.signal();
-}
-
/**
Causes the application to exit gracefully with the given exit code.
*/
void Application::exit(int c)
{
- done=true;
- exit_code=c;
- if(loop_mode_==SLEEP)
- sleep_sem_.signal();
+ done = true;
+ exit_code = c;
}
/**
}
-Application::RegBase::RegBase()
+Application::Starter::Starter()
{
- if(reg_app_)
- {
- cerr<<"Warning: registering the application twice\n";
- delete reg_app_;
- }
+ if(starter_)
+ throw logic_error("Can't create more than one Starter instance");
- reg_app_=this;
+ starter_ = this;
}
-Application *Application::app_=0;
-Application::RegBase *Application::reg_app_=0;
-void *Application::data_=0;
-
} // namespace Msp
projects / libs / core.git / blobdiff