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Bochs/bochs/gui/wxmain.cc

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//
// gui/wxmain.cc
// $Id: wxmain.cc,v 1.3 2002-06-01 15:44:54 vruppert Exp $
//
// wxmain.cc implements the wxWindows frame, toolbar, menus, and dialogs.
// When the application starts, the user is given a chance to choose/edit/save
// a configuration. When they decide to start the simulation, functions in
// main.cc are called in a separate thread to initialize and run the Bochs
// simulator.
//
// The wxWindows port of the VGA display is implemented in wx.cc. The
// separation between wxmain.cc and wx.cc is as follows:
// - wxmain.cc implements a Bochs configuration interface, which is
// the wxWindows equivalent of control.cc. wxmain creates a
// frame with several menus and a toolbar, and allows the user to
// choose the machine configuration and start the simulation.
// - wx.cc implements a VGA display screen using wxWindows. It is
// is the wxWindows equivalent of x.cc, win32.cc, macos.cc, etc.
// wx.cc includes bochs.h and has access to all Bochs devices.
// The VGA panel accepts only paint, key, and mouse events. As it
// receives events, it builds BxEvents and places them into a
// thread-safe BxEvent queue. The simulation thread periodically
// processes events from the BxEvent queue (bx_gui_c::handle_events)
// and notifies the appropriate emulated I/O device.
//
//////////////////////////////////////////////////////////////////////
// includes
//////////////////////////////////////////////////////////////////////
// For compilers that support precompilation, includes "wx/wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#ifndef WX_PRECOMP
#include "wx/wx.h"
#endif
#include "wx/image.h"
#include "config.h" // definitions based on configure script
#include "osdep.h" // workarounds for missing stuff
#include "gui/siminterface.h" // interface to the simulator
#include "bxversion.h" // get version string
#include "wxmain.h" // interface to the gui
// include XPM icons
#include "bitmaps/cdromd.xpm"
#include "bitmaps/copy.xpm"
#include "bitmaps/floppya.xpm"
#include "bitmaps/floppyb.xpm"
#include "bitmaps/paste.xpm"
#include "bitmaps/power.xpm"
#include "bitmaps/reset.xpm"
#include "bitmaps/snapshot.xpm"
#include "bitmaps/mouse.xpm"
#include "bitmaps/configbutton.xpm"
// FIXME: ugly global variables that the bx_gui_c object in wx.cc can use
// to access the MyFrame and the MyPanel.
MyFrame *theFrame = NULL;
MyPanel *thePanel = NULL;
enum
{
ID_Quit = 1,
ID_Config_New,
ID_Config_Read,
ID_Config_Save,
ID_Edit_Disks,
ID_Edit_Boot,
ID_Edit_Vga,
ID_Edit_Memory,
ID_Edit_Sound,
ID_Edit_Network,
ID_Edit_Keyboard,
ID_Edit_Other,
ID_Simulate_Start,
ID_Simulate_PauseResume,
ID_Simulate_Stop,
ID_Simulate_Speed,
ID_Debug_ShowCpu,
ID_Debug_ShowMemory,
ID_Log_View,
ID_Log_Prefs,
ID_Log_PrefsDevice,
ID_Help_About,
ID_Sim2Gui_Event,
// ids for Bochs toolbar
ID_Toolbar_FloppyA,
ID_Toolbar_FloppyB,
ID_Toolbar_CdromD,
ID_Toolbar_Reset,
ID_Toolbar_Power,
ID_Toolbar_Copy,
ID_Toolbar_Paste,
ID_Toolbar_Snapshot,
ID_Toolbar_Config,
ID_Toolbar_Mouse_en
};
//////////////////////////////////////////////////////////////////////
// class declarations
//////////////////////////////////////////////////////////////////////
class MyApp: public wxApp
{
virtual bool OnInit();
};
class SimThread: public wxThread
{
MyFrame *frame;
// when the sim thread sends a synchronous event to the GUI thread, the
// response is stored in sim2gui_mailbox.
// FIXME: this would be cleaner and more reusable if I made a general
// thread-safe mailbox class.
BxEvent *sim2gui_mailbox;
wxCriticalSection sim2gui_mailbox_lock;
public:
SimThread (MyFrame *_frame) { frame = _frame; sim2gui_mailbox = NULL; }
virtual ExitCode Entry ();
void OnExit ();
// called by the siminterface code, with the pointer to the sim thread
// in the thisptr arg.
static BxEvent *SiminterfaceCallback (void *thisptr, BxEvent *event);
BxEvent *SiminterfaceCallback2 (BxEvent *event);
// methods to coordinate synchronous response mailbox
void ClearSyncResponse ();
void SendSyncResponse (BxEvent *);
BxEvent *GetSyncResponse ();
};
//////////////////////////////////////////////////////////////////////
// MyApp: the wxWindows application
//////////////////////////////////////////////////////////////////////
IMPLEMENT_APP(MyApp)
bool MyApp::OnInit()
{
//wxLog::AddTraceMask (_T("mime"));
bx_init_siminterface ();
bx_init_main ();
MyFrame *frame = new MyFrame( "Bochs x86 Emulator", wxPoint(50,50), wxSize(450,340), wxMINIMIZE_BOX | wxSYSTEM_MENU | wxCAPTION );
theFrame = frame; // hack alert
frame->Show( TRUE );
SetTopWindow( frame );
return TRUE;
}
//////////////////////////////////////////////////////////////////////
// MyFrame: the main frame for the Bochs application
//////////////////////////////////////////////////////////////////////
BEGIN_EVENT_TABLE(MyFrame, wxFrame)
EVT_MENU(ID_Quit, MyFrame::OnQuit)
EVT_MENU(ID_Help_About, MyFrame::OnAbout)
EVT_MENU(ID_Simulate_Start, MyFrame::OnStartSim)
EVT_MENU(ID_Simulate_PauseResume, MyFrame::OnPauseResumeSim)
EVT_MENU(ID_Simulate_Stop, MyFrame::OnKillSim)
EVT_MENU(ID_Sim2Gui_Event, MyFrame::OnSim2GuiEvent)
// toolbar events
EVT_TOOL(ID_Toolbar_FloppyA, MyFrame::OnToolbarClick)
EVT_TOOL(ID_Toolbar_FloppyB, MyFrame::OnToolbarClick)
EVT_TOOL(ID_Toolbar_CdromD, MyFrame::OnToolbarClick)
EVT_TOOL(ID_Toolbar_Reset, MyFrame::OnToolbarClick)
EVT_TOOL(ID_Toolbar_Power, MyFrame::OnToolbarClick)
EVT_TOOL(ID_Toolbar_Copy, MyFrame::OnToolbarClick)
EVT_TOOL(ID_Toolbar_Paste, MyFrame::OnToolbarClick)
EVT_TOOL(ID_Toolbar_Snapshot, MyFrame::OnToolbarClick)
EVT_TOOL(ID_Toolbar_Config, MyFrame::OnToolbarClick)
EVT_TOOL(ID_Toolbar_Mouse_en, MyFrame::OnToolbarClick)
END_EVENT_TABLE()
MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size, const long style)
: wxFrame((wxFrame *)NULL, -1, title, pos, size, style)
{
// init variables
sim_thread = NULL;
start_bochs_times = 0;
// set up the gui
menuConfiguration = new wxMenu;
menuConfiguration->Append( ID_Config_New, "&New Configuration" );
menuConfiguration->Append( ID_Config_Read, "&Read Configuration" );
menuConfiguration->Append( ID_Config_Save, "&Save Configuration" );
menuConfiguration->AppendSeparator ();
menuConfiguration->Append (ID_Quit, "&Quit");
menuEdit = new wxMenu;
menuEdit->Append( ID_Edit_Disks, "&Disks..." );
menuEdit->Append( ID_Edit_Boot, "&Boot..." );
menuEdit->Append( ID_Edit_Vga, "&VGA..." );
menuEdit->Append( ID_Edit_Memory, "&Memory..." );
menuEdit->Append( ID_Edit_Sound, "&Sound..." );
menuEdit->Append( ID_Edit_Network, "&Network..." );
menuEdit->Append( ID_Edit_Keyboard, "&Keyboard..." );
menuEdit->Append( ID_Edit_Other, "&Other..." );
menuSimulate = new wxMenu;
menuSimulate->Append( ID_Simulate_Start, "&Start...");
menuSimulate->Append( ID_Simulate_PauseResume, "&Pause...");
menuSimulate->Append( ID_Simulate_Stop, "S&top...");
menuSimulate->AppendSeparator ();
menuSimulate->Append( ID_Simulate_Speed, "S&peed...");
menuSimulate->Enable (ID_Simulate_PauseResume, FALSE);
menuSimulate->Enable (ID_Simulate_Stop, FALSE);
menuDebug = new wxMenu;
menuDebug->Append (ID_Debug_ShowCpu, "Show &CPU");
menuDebug->Append (ID_Debug_ShowMemory, "Show &memory");
menuLog = new wxMenu;
menuLog->Append (ID_Log_View, "&View");
menuLog->Append (ID_Log_Prefs, "&Preferences...");
menuLog->Append (ID_Log_PrefsDevice, "By &Device...");
menuHelp = new wxMenu;
menuHelp->Append( ID_Help_About, "&About..." );
wxMenuBar *menuBar = new wxMenuBar;
menuBar->Append( menuConfiguration, "&File" );
menuBar->Append( menuEdit, "&Edit" );
menuBar->Append( menuSimulate, "&Simulate" );
menuBar->Append( menuDebug, "&Debug" );
menuBar->Append( menuLog, "&Log" );
menuBar->Append( menuHelp, "&Help" );
SetMenuBar( menuBar );
CreateStatusBar();
SetStatusText( "Welcome to wxWindows!" );
CreateToolBar(wxNO_BORDER|wxHORIZONTAL|wxTB_FLAT);
wxToolBar *tb = GetToolBar();
tb->SetToolBitmapSize(wxSize(16, 16));
int currentX = 5;
#define BX_ADD_TOOL(id, xpm_name, tooltip) \
do {tb->AddTool(id, wxBitmap(xpm_name), wxNullBitmap, FALSE, currentX, -1, (wxObject *)NULL, tooltip); currentX += 34; } while (0)
BX_ADD_TOOL(ID_Toolbar_FloppyA, floppya_xpm, "Change Floppy A");
BX_ADD_TOOL(ID_Toolbar_FloppyB, floppyb_xpm, "Change Floppy B");
BX_ADD_TOOL(ID_Toolbar_CdromD, cdromd_xpm, "Change CDROM");
BX_ADD_TOOL(ID_Toolbar_Reset, reset_xpm, "Reset the system");
BX_ADD_TOOL(ID_Toolbar_Power, power_xpm, "Turn power on/off");
BX_ADD_TOOL(ID_Toolbar_Copy, copy_xpm, "Copy to clipboard");
BX_ADD_TOOL(ID_Toolbar_Paste, paste_xpm, "Paste from clipboard");
BX_ADD_TOOL(ID_Toolbar_Snapshot, snapshot_xpm, "Save screen snapshot");
BX_ADD_TOOL(ID_Toolbar_Config, configbutton_xpm, "Runtime Configuration");
BX_ADD_TOOL(ID_Toolbar_Mouse_en, mouse_xpm, "Mouse Enable/Disable");
tb->Realize();
// create a MyPanel that covers the whole frame
panel = new MyPanel (this, -1);
panel->SetBackgroundColour (wxColour (0,0,0));
wxGridSizer *sz = new wxGridSizer (1, 1);
sz->Add (panel, 0, wxGROW);
SetAutoLayout (TRUE);
SetSizer (sz);
thePanel = panel;
}
void MyFrame::OnQuit(wxCommandEvent& event)
{
Close( TRUE );
OnKillSim (event);
#if 0
if (SIM)
SIM->quit_sim(0); // give bochs a chance to shut down
#endif
}
void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
{
wxString str;
str.Printf ("Bochs x86 Emulator version %s (wxWindows port)", VER_STRING);
wxMessageBox( str, "About Bochs", wxOK | wxICON_INFORMATION );
}
void MyFrame::OnStartSim(wxCommandEvent& WXUNUSED(event))
{
wxCriticalSectionLocker lock(sim_thread_lock);
if (sim_thread != NULL) {
wxMessageBox (
"Can't start Bochs simulator, because it is already running",
"Already Running", wxOK | wxICON_ERROR);
return;
}
wxLogStatus ("Starting a Bochs simulation");
start_bochs_times++;
if (start_bochs_times>1) {
wxMessageBox (
"You have already started the simulator once this session. Due to memory leaks, you may get unstable behavior.",
"2nd time warning", wxOK | wxICON_WARNING);
}
num_events = 0; // clear the queue of events for bochs to handle
sim_thread = new SimThread (this);
sim_thread->Create ();
sim_thread->Run ();
wxLogDebug ("Simulator thread has started.");
// set up callback for events from simulator thread
SIM->set_notify_callback (&SimThread::SiminterfaceCallback, sim_thread);
// fix up menu choices
menuSimulate->Enable (ID_Simulate_Start, FALSE);
menuSimulate->Enable (ID_Simulate_PauseResume, TRUE);
menuSimulate->Enable (ID_Simulate_Stop, TRUE);
menuSimulate->SetLabel (ID_Simulate_PauseResume, "&Pause");
}
void MyFrame::OnPauseResumeSim(wxCommandEvent& WXUNUSED(event))
{
wxCriticalSectionLocker lock(sim_thread_lock);
if (sim_thread) {
if (sim_thread->IsPaused ()) {
SetStatusText ("Resuming the Bochs simulation");
sim_thread->Resume ();
menuSimulate->SetLabel (ID_Simulate_PauseResume, "&Pause");
} else {
SetStatusText ("Pausing the Bochs simulation");
sim_thread->Pause ();
menuSimulate->SetLabel (ID_Simulate_PauseResume, "&Resume");
}
}
}
void MyFrame::OnKillSim(wxCommandEvent& WXUNUSED(event))
{
// DON'T use a critical section here. Delete implicitly calls
// OnSimThreadExit, which also tries to lock sim_thread_lock.
// If we grab the lock at this level, deadlock results.
if (sim_thread) {
SetStatusText ("Killing the Bochs simulation");
sim_thread->Delete ();
menuSimulate->Enable (ID_Simulate_Start, TRUE);
menuSimulate->Enable (ID_Simulate_PauseResume, FALSE);
menuSimulate->Enable (ID_Simulate_Stop, FALSE);
menuSimulate->SetLabel (ID_Simulate_PauseResume, "&Pause");
}
}
void
MyFrame::OnSimThreadExit () {
wxCriticalSectionLocker lock (sim_thread_lock);
sim_thread = NULL;
}
int
MyFrame::HandleAskParamString (bx_param_string_c *param)
{
wxLogDebug ("HandleAskParamString start");
bx_param_num_c *opt = param->get_options ();
wxASSERT (opt != NULL);
int n_opt = opt->get ();
char *msg = param->get_ask_format ();
if (!msg) msg = param->get_description ();
char *newval = NULL;
wxDialog *dialog = NULL;
if (n_opt & param->BX_IS_FILENAME) {
// use file open dialog
long style =
(n_opt & param->BX_SAVE_FILE_DIALOG) ? wxSAVE|wxOVERWRITE_PROMPT : wxOPEN;
wxLogDebug ("HandleAskParamString: create dialog");
wxFileDialog *fdialog = new wxFileDialog (this, msg, "", "", "*.*", style);
wxLogDebug ("HandleAskParamString: before showmodal");
if (fdialog->ShowModal() == wxID_OK)
newval = (char *)fdialog->GetPath().c_str ();
wxLogDebug ("HandleAskParamString: after showmodal");
dialog = fdialog; // so I can delete it
} else {
// use simple string dialog
long style = wxOK|wxCANCEL;
wxTextEntryDialog *tdialog = new wxTextEntryDialog (this, msg, "Enter new value", wxString(param->getptr ()), style);
if (tdialog->ShowModal() == wxID_OK)
newval = (char *)tdialog->GetValue().c_str ();
dialog = tdialog; // so I can delete it
}
// newval points to memory inside the dialg. As soon as dialog is deleted, newval points
// to junk. So be sure to copy the text out before deleting it!
if (newval && strlen(newval)>0) {
// change floppy path to this value.
wxLogDebug ("Setting param %s to '%s'", param->get_name (), newval);
param->set (newval);
delete dialog;
return 1;
}
delete dialog;
return -1;
}
// This is called when the simulator needs to ask the user to choose
// a value or setting. For example, when the user indicates that he wants
// to change the floppy disk image for drive A, an ask-param event is created
// with the parameter id set to BXP_FLOPPYA_PATH. The simulator blocks until
// the gui has displayed a dialog and received a selection from the user.
// In the current implemention, the GUI will look up the parameter's
// data structure using SIM->get_param() and then call the set method on the
// parameter to change the param. The return value only needs to return
// success or failure (failure = cancelled, or not implemented).
// Returns 1 if the user chose a value and the param was modified.
// Returns 0 if the user cancelled.
// Returns -1 if the gui doesn't know how to ask for that param.
int
MyFrame::HandleAskParam (BxEvent *event)
{
wxASSERT (event->type == BX_SYNC_EVT_ASK_PARAM);
bx_param_c *param = event->u.param.param;
Raise (); // bring control panel to front so that you will see the dialog
switch (param->get_type ())
{
case BXT_PARAM_STRING:
return HandleAskParamString ((bx_param_string_c *)param);
default:
{
wxString msg;
msg.Printf ("ask param for parameter type %d is not implemented in wxWindows");
wxMessageBox( msg, "not implemented", wxOK | wxICON_ERROR );
return -1;
}
}
#if 0
switch (param) {
case BXP_FLOPPYA_PATH:
case BXP_FLOPPYB_PATH:
case BXP_DISKC_PATH:
case BXP_DISKD_PATH:
case BXP_CDROM_PATH:
{
Raise(); // bring the control panel to front so dialog shows
char *msg;
if (param==BXP_FLOPPYA_PATH || param==BXP_FLOPPYB_PATH)
msg = "Choose new floppy disk image file";
else if (param==BXP_DISKC_PATH || param==BXP_DISKD_PATH)
msg = "Choose new hard disk image file";
else if (param==BXP_CDROM_PATH)
msg = "Choose new CDROM image file";
else
msg = "Choose new image file";
wxFileDialog dialog(this, msg, "", "", "*.*", 0);
int ret = dialog.ShowModal();
if (ret == wxID_OK)
{
char *newpath = (char *)dialog.GetPath().c_str ();
if (newpath && strlen(newpath)>0) {
// change floppy path to this value.
bx_param_string_c *Opath = SIM->get_param_string (param);
assert (Opath != NULL);
wxLogDebug ("Setting floppy %c path to '%s'",
param == BXP_FLOPPYA_PATH ? 'A' : 'B',
newpath);
Opath->set (newpath);
return 1;
}
}
return 0;
}
default:
wxLogError ("HandleAskParam: parameter %d, not implemented", event->u.param.id);
}
#endif
return -1; // could not display
}
// This is called when a Sim2Gui event is discovered on the GUI thread's
// event queue. (It got there via wxPostEvent in SiminterfaceCallback2,
// which is executed in the simulator Thread.)
void
MyFrame::OnSim2GuiEvent (wxCommandEvent& event)
{
static wxString choices[] = { "Continue", "Continue and Disable", "Die" };
int choice;
wxString string;
wxLogDebug ("received a bochs event in the GUI thread");
BxEvent *be = (BxEvent *) event.GetEventObject ();
wxLogDebug ("event type = %d", (int) be->type);
// all cases should return. sync event handlers MUST send back a
// response.
switch (be->type) {
case BX_SYNC_EVT_ASK_PARAM:
wxLogDebug ("before HandleAskParam");
be->retcode = HandleAskParam (be);
wxLogDebug ("after HandleAskParam");
// sync must return something; just return a copy of the event.
sim_thread->SendSyncResponse(be);
wxLogDebug ("after SendSyncResponse");
return;
case BX_ASYNC_EVT_SHUTDOWN_GUI:
wxLogDebug ("control panel is exiting");
Close (TRUE);
wxExit ();
return;
case BX_ASYNC_EVT_LOG_MSG:
wxLogDebug ("log msg: level=%d, prefix='%s', msg='%s'",
be->u.logmsg.level,
be->u.logmsg.prefix,
be->u.logmsg.msg);
wxMutexGuiEnter();
string.Printf ("%s", be->u.logmsg.msg);
choice = ::wxGetSingleChoiceIndex (
string,
wxString (SIM->get_log_level_name (be->u.logmsg.level)), 3, choices);
if (choice<0) choice = 2; // treat cancel the same as "die"
be->retcode = choice;
wxLogDebug ("you chose %d", choice);
wxMutexGuiLeave();
return;
default:
wxLogDebug ("OnSim2GuiEvent: event type %d ignored", (int)be->type);
// assume it's a synchronous event and send back a response, to avoid
// potential deadlock.
sim_thread->SendSyncResponse(be);
return;
}
// it is critical to send a response back eventually since the sim thread
// is blocking.
wxASSERT_MSG (0, "switch stmt should have returned");
}
void MyFrame::OnToolbarClick(wxCommandEvent& event)
{
wxLogDebug ("clicked toolbar thingy");
bx_toolbar_buttons which = BX_TOOLBAR_UNDEFINED;
int id = event.GetId ();
switch (id) {
case ID_Toolbar_Power:which = BX_TOOLBAR_POWER; break;
case ID_Toolbar_Reset: which = BX_TOOLBAR_RESET; break;
case ID_Toolbar_FloppyA: which = BX_TOOLBAR_FLOPPYA; break;
case ID_Toolbar_FloppyB: which = BX_TOOLBAR_FLOPPYB; break;
case ID_Toolbar_CdromD: which = BX_TOOLBAR_CDROMD; break;
case ID_Toolbar_Copy: which = BX_TOOLBAR_COPY; break;
case ID_Toolbar_Paste: which = BX_TOOLBAR_PASTE; break;
case ID_Toolbar_Snapshot: which = BX_TOOLBAR_SNAPSHOT; break;
case ID_Toolbar_Config: which = BX_TOOLBAR_CONFIG; break;
case ID_Toolbar_Mouse_en: which = BX_TOOLBAR_MOUSE_EN; break;
default:
wxLogError ("unknown toolbar id %d", id);
}
if (num_events < MAX_EVENTS) {
event_queue[num_events].type = BX_ASYNC_EVT_TOOLBAR;
event_queue[num_events].u.toolbar.button = which;
num_events++;
}
}
//////////////////////////////////////////////////////////////////////
// Simulation Thread
//////////////////////////////////////////////////////////////////////
void *
SimThread::Entry (void)
{
int argc=1;
char *argv[] = {"bochs"};
wxLogDebug ("in SimThread, starting at bx_continue_after_control_panel");
// run all the rest of the Bochs simulator code. This function will
// run forever, unless a "kill_bochs_request" is issued. The procedure
// is as follows:
// - user selects "Kill Simulation" or GUI decides to kill bochs
// - GUI calls sim_thread->Delete ()
// - sim continues to run until the next time it reaches SIM->periodic().
// - SIM->periodic() sends a synchronous tick event to the GUI, which
// finally calls TestDestroy() and realizes it needs to stop. It
// sets the sync event return code to -1. SIM->periodic() sets the
// kill_bochs_request flag in cpu #0.
// - cpu loop notices kill_bochs_request and returns to main.cc:
// bx_continue_after_control_panel(), which notices the
// kill_bochs_request and returns back to this Entry() function.
// - Entry() exits and the thread stops. Whew.
bx_continue_after_control_panel (argc, argv);
wxLogDebug ("in SimThread, bx_continue_after_control_panel exited");
return NULL;
}
void
SimThread::OnExit ()
{
// notify the MyFrame that the bochs thread has died. I can't adjust
// the sim_thread directly because it's private.
frame->OnSimThreadExit ();
// don't use this SimThread's callback function anymore.
SIM->set_notify_callback (NULL, NULL);
}
// This function is declared static so that I can get a usable function
// pointer for it. The function pointer is passed to SIM->set_notify_callback
// so that the siminterface can call this function when it needs to contact
// the gui. It will always be called with a pointer to the SimThread
// as the first argument.
BxEvent *
SimThread::SiminterfaceCallback (void *thisptr, BxEvent *event)
{
SimThread *me = (SimThread *)thisptr;
// call the normal non-static method now that we know the this pointer.
return me->SiminterfaceCallback2 (event);
}
// callback function for sim thread events. This is called from
// the sim thread, not the GUI thread. So any GUI actions must be
// thread safe. Most events are handled by packaging up the event
// in a wxEvent of some kind, and posting it to the GUI thread for
// processing.
BxEvent *
SimThread::SiminterfaceCallback2 (BxEvent *event)
{
//wxLogDebug ("SiminterfaceCallback with event type=%d", (int)event->type);
event->retcode = 0; // default return code
int async = BX_EVT_IS_ASYNC(event->type);
if (!async) {
// for synchronous events, clear away any previous response. There
// can only be one synchronous event pending at a time.
ClearSyncResponse ();
event->retcode = -1; // default to error
}
// tick event must be handled right here in the bochs thread.
if (event->type == BX_SYNC_EVT_TICK) {
if (TestDestroy ()) {
// tell simulator to quit
event->retcode = -1;
} else {
event->retcode = 0;
}
return event;
}
//encapsulate the bxevent in a wxwindows event
wxCommandEvent wxevent (wxEVT_COMMAND_MENU_SELECTED, ID_Sim2Gui_Event);
wxevent.SetEventObject ((wxEvent *)event);
wxLogDebug ("Sending an event to the window");
wxPostEvent (frame, wxevent);
if (event->type == BX_ASYNC_EVT_LOG_MSG) {
event->retcode = -1;
while (event->retcode == -1) this->Sleep(500);
return event;
}
// if it is an asynchronous event, return immediately
if (async) return NULL;
wxLogDebug ("SiminterfaceCallback2: synchronous event; waiting for response");
// now wait forever for the GUI to post a response.
BxEvent *response = NULL;
while (response == NULL) {
response = GetSyncResponse ();
if (!response) {
wxLogDebug ("no sync response yet, waiting");
this->Sleep(500);
}
}
wxASSERT (response != NULL);
return response;
}
void
SimThread::ClearSyncResponse ()
{
wxCriticalSectionLocker lock(sim2gui_mailbox_lock);
if (sim2gui_mailbox != NULL) {
wxLogDebug ("WARNING: ClearSyncResponse is throwing away an event that was previously in the mailbox");
}
sim2gui_mailbox = NULL;
}
void
SimThread::SendSyncResponse (BxEvent *event)
{
wxCriticalSectionLocker lock(sim2gui_mailbox_lock);
if (sim2gui_mailbox != NULL) {
wxLogDebug ("WARNING: SendSyncResponse is throwing away an event that was previously in the mailbox");
}
sim2gui_mailbox = event;
}
BxEvent *
SimThread::GetSyncResponse ()
{
wxCriticalSectionLocker lock(sim2gui_mailbox_lock);
BxEvent *event = sim2gui_mailbox;
sim2gui_mailbox = NULL;
return event;
}
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