X-Git-Url: http://git.tdb.fi/?p=libs%2Fcore.git;a=blobdiff_plain;f=source%2Fapplication.cpp;fp=source%2Fapplication.cpp;h=765b0670d3ecee5ccaad9228b02306769022e0d7;hp=0000000000000000000000000000000000000000;hb=1013e3c216cdf8e0ecc0f3b1e8314989b5333818;hpb=5780f0826f057f99593de46a583be7c098efaf90

diff --git a/source/application.cpp b/source/application.cpp
new file mode 100644
index 0000000..765b067
--- /dev/null
+++ b/source/application.cpp
@@ -0,0 +1,171 @@
+/*
+This file is part of libmspframework
+Copyright © 2006 Mikko Rasa, Mikkosoft Productions
+Distributed under the LGPL
+*/
+#include <signal.h>
+#include <iostream>
+#include "application.h"
+#include "error.h"
+
+using namespace std;
+
+namespace Msp {
+
+Poller::Slot &Application::add_pollable(Pollable *obj, short events)
+{
+	if(!poller_)
+		poller_=new Poller;
+	
+	Poller::Slot &slot=poller_->add_pollable(obj, events);
+	// Interrupt a possible poll in progress
+	pthread_kill(main_tid, SIGALRM);	
+	return slot;
+}
+
+EventManager::Event &Application::create_event()
+{
+	if(!ev_mgr_)
+		ev_mgr_=new EventManager(*this);
+
+	return ev_mgr_->create_event();
+}
+
+Application::~Application()
+{
+	if(poller_)
+		delete poller_;
+	if(ev_mgr_)
+		delete ev_mgr_;
+}
+
+/**
+Constructs an instance of the registered application class and runs it.  If the
+application throws a UsageError, the static usage() function is called.
+
+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)
+{
+	static bool called=false;
+	if(called)
+	{
+		cerr<<"Trying to call Application::run_app twice!\n";
+		return 125;
+	}
+	called=true;
+
+	if(!reg_app_)
+	{
+		cerr<<"Trying to run with no application class registered!\n";
+		return 126;
+	}
+
+	signal(SIGALRM, &sigalrm_);
+	
+	try
+	{
+		app_=reg_app_->create_app(argc, argv);
+	}
+	catch(const UsageError &e)
+	{
+		reg_app_->usage(argv[0], e.get_brief());
+		return 1;
+	}
+
+	int result=app_->main();
+	delete app_;
+	return result;
+}
+
+/**
+Prints a message describing the usage of the application.  The default version
+will blame the programmer for being lazy.
+
+@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 *, bool)
+{
+	cerr<<"The programmer was lazy and didn't write a usage() function for this application.\n";
+}
+
+/**
+Default main loop.  Calls tick() periodically if do_ticks is true, otherwise
+just sleeps.  A custom main loop should monitor the done member variable and
+return exit_code.
+*/
+int Application::main()
+{
+	done=false;
+	while(!done)
+	{
+		if(tick_mode_==IDLE)
+		{
+			if(poller_)
+				poller_->poll(0);
+			tick();
+			sched_yield();
+		}
+		else
+		{
+			if(poller_)
+				poller_->poll(-1);
+			else
+			{
+				timespec ts={1000,0};
+				nanosleep(&ts, 0);
+			}
+			if(tick_mode_!=NONE)
+				tick();
+		}
+	}
+
+	return exit_code;
+}
+
+/**
+Sets the specified signal to be delivered to the sighandler member function.
+*/
+void Application::catch_signal(int s)
+{
+	signal(s, &sighandler_);
+}
+
+void Application::set_tick_mode(TickMode t)
+{
+	tick_mode_=t;
+	pthread_kill(main_tid, SIGALRM);	
+}
+
+/**
+Causes the application to exit gracefully with the given exit code.
+*/
+void Application::exit(int c)
+{
+	done=true;
+	exit_code=c;
+	pthread_kill(main_tid, SIGALRM);	
+}
+
+void Application::sighandler_(int s)
+{
+	app_->sighandler(s);
+}
+
+Application::RegBase::RegBase()
+{
+	if(reg_app_)
+	{
+		cerr<<"Warning: registering the application twice\n";
+		delete reg_app_;
+	}
+
+	reg_app_=this;
+}
+
+Application *Application::app_=0;
+Application::RegBase *Application::reg_app_=0;
+
+} // namespace Msp