-/*
-This file is part of libmspcore
-Copyright © 2006 Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
+#include <cstring>
+#include <typeinfo>
#include <signal.h>
-#include <iostream>
-#include "../time/units.h"
+#include <msp/debug/demangle.h>
+#include <msp/debug/errorreporter.h>
+#include <msp/fs/dir.h>
+#include <msp/fs/path.h>
+#include <msp/fs/utils.h>
+#include <msp/io/print.h>
#include "application.h"
-#include "error.h"
+#include "getopt.h"
using namespace std;
namespace Msp {
-/**
-Constructs an instance of the registered application class and runs it. If the
-application throws a UsageError, the static usage() function is called.
+Application *Application::app_ = 0;
+Application::Starter *Application::starter_ = 0;
+const char *Application::argv0_ = 0;
+string Application::name_;
+void *Application::data_ = 0;
-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)
+Application::Application(const string &n):
+ exit_code(0)
{
- static bool called=false;
- if(called)
- {
- cerr<<"Trying to call Application::run_app twice!\n";
- return 125;
- }
- called=true;
+ if(app_)
+ throw logic_error("instance already exists");
+
+ if(!n.empty())
+ name_ = n;
+ else
+ name_ = FS::basename(argv0_);
+}
- if(!reg_app_)
+int Application::run(int argc, char **argv, void *data, void (*created_callback)(void *))
+{
+ if(!starter_)
{
- cerr<<"Trying to run with no application class registered!\n";
+ IO::cerr.write("Application::run called with no RegisteredApplication class!\n");
return 126;
}
+ set_startup_info(argv[0], data);
+
try
{
- app_=reg_app_->create_app(argc, argv);
+ try
+ {
+ app_ = starter_->create_app(argc, argv);
+ }
+ catch(const usage_error &e)
+ {
+ IO::print(IO::cerr, "%s\n%s\n", e.what(), e.help());
+ return 1;
+ }
+
+ if(created_callback)
+ created_callback(data);
+
+ int result = app_->main();
+ Application *a = app_;
+ app_ = 0;
+ delete a;
+ return result;
}
- catch(const UsageError &e)
+ catch(const exception &e)
{
- reg_app_->usage(e.what(), argv[0], e.get_brief());
- return 1;
- }
+ bool handled = false;
+ if(const Debug::ErrorReporter *er = Debug::ErrorReporter::get_current())
+ handled = er->report_uncaught_exception(e);
- int result=app_->main();
- delete app_;
- return result;
-}
+ if(!handled)
+ {
+ IO::print(IO::cerr, "An uncaught exception occurred.\n");
+ IO::print(IO::cerr, " type: %s\n", Debug::demangle(typeid(e).name()));
+ IO::print(IO::cerr, " what(): %s\n", e.what());
+ }
-/**
-Prints a message describing the usage of the application. The default version
-will blame the programmer for being lazy.
+ delete app_;
+ app_ = 0;
-@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<<reason<<'\n';
- cerr<<"The programmer was lazy and didn't write a usage() function for this application.\n";
+ return 124;
+ }
}
-Application::Application():
- exit_code(0),
- loop_mode_(TICK_SLEEP)
-{ }
-
-/**
-Default main loop. Behavior depends on loop_mode_. A custom main loop should
-monitor the done member variable and return exit_code.
-*/
-int Application::main()
+void Application::set_startup_info(const char *argv0, void *data)
{
- if(loop_mode_==NONE)
- return 0;
+ if(argv0_)
+ throw logic_error("startup info already set");
- done=false;
- while(!done)
+ static FS::Path exe;
+
+ if(!argv0 || !*argv0)
{
- if(loop_mode_==SLEEP)
- {
- sleep_sem_.wait();
- if(!done)
- tick();
- }
- else if(loop_mode_==TICK_SLEEP)
- {
- tick();
- sleep(Time::msec);
- }
- else if(loop_mode_==TICK_YIELD)
- {
- tick();
-#ifdef WIN32
- Sleep(0);
+#ifdef _WIN32
+ argv0 = "application.exe";
#else
- sched_yield();
+ argv0 = "./application";
#endif
- }
}
- return exit_code;
-}
+ bool has_slash = strchr(argv0, FS::DIRSEP);
+ if(!has_slash)
+ exe = FS::path_lookup(argv0);
+ if(exe.empty())
+ exe = FS::realpath(argv0);
-/**
-Sets the specified signal to be delivered to the sighandler member function.
-*/
-void Application::catch_signal(int s)
-{
- signal(s, &sighandler_);
+ argv0_ = exe.c_str();
+ data_ = data;
}
-/**
-Changes the main loop mode.
-*/
-void Application::set_loop_mode(LoopMode l)
+int Application::main()
{
- LoopMode old_mode=loop_mode_;
- loop_mode_=l;
- if(old_mode==SLEEP)
- sleep_sem_.signal();
+ done = false;
+ while(!done)
+ tick();
+
+ return exit_code;
}
-/**
-Causes the tick() function to be executed once if loop mode is SLEEP. Has no
-effect with other loop modes.
-*/
-void Application::induce_tick()
+void Application::catch_signal(int s)
{
- if(loop_mode_==SLEEP)
- sleep_sem_.signal();
+ signal(s, &sighandler_);
}
-/**
-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;
}
-/**
-Static wrapper function to call a member function of the Application instance.
-*/
void Application::sighandler_(int s)
{
app_->sighandler(s);
}
-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;
-
} // namespace Msp
projects / libs / core.git / blobdiff