/////////////////////////////////////////////////////////////////////////////
-// Name: msw/utilsexec.cpp
+// Name: src/msw/utilsexc.cpp
// Purpose: wxExecute implementation for MSW
// Author: Julian Smart
// Modified by:
// Created: 04/01/98
// RCS-ID: $Id$
-// Copyright: (c) 1998-2002 wxWindows dev team
-// Licence: wxWindows license
+// Copyright: (c) 1998-2002 wxWidgets dev team
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// ============================================================================
// headers
// ----------------------------------------------------------------------------
-#ifdef __GNUG__
- #pragma implementation
-#endif
-
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#include "wx/app.h"
#include "wx/intl.h"
#include "wx/log.h"
- #if wxUSE_GUI // See 'dirty hack' below.
- #include "wx/frame.h"
+ #if wxUSE_STREAMS
+ #include "wx/stream.h"
#endif
+ #include "wx/module.h"
#endif
-#ifdef __WIN32__
- #include "wx/stream.h"
- #include "wx/process.h"
-#endif
+#include "wx/process.h"
+#include "wx/thread.h"
+#include "wx/apptrait.h"
+#include "wx/evtloop.h"
+#include "wx/vector.h"
+
#include "wx/msw/private.h"
#include <ctype.h>
-#if !defined(__GNUWIN32__) && !defined(__WXWINE__) && !defined(__SALFORDC__) && !defined(__WXMICROWIN__)
+#if !defined(__GNUWIN32__) && !defined(__WXMICROWIN__) && !defined(__WXWINCE__)
#include <direct.h>
#ifndef __MWERKS__
#include <dos.h>
#endif
#endif
-#if defined(__GNUWIN32__) && !defined(__TWIN32__)
+#if defined(__GNUWIN32__)
#include <sys/unistd.h>
#include <sys/stat.h>
#endif
-#if defined(__WIN32__) && !defined(__WXWINE__) && !defined(__WXMICROWIN__)
-#include <io.h>
+#if !defined(__WXMICROWIN__) && !defined(__WXWINCE__)
+ #ifndef __UNIX__
+ #include <io.h>
+ #endif
-#ifndef __GNUWIN32__
-#include <shellapi.h>
-#endif
+ #ifndef __GNUWIN32__
+ #include <shellapi.h>
+ #endif
#endif
#include <stdio.h>
#include "wx/dde.h" // for WX_DDE hack in wxExecute
#endif // wxUSE_IPC
+// implemented in utils.cpp
+extern "C" WXDLLIMPEXP_BASE HWND
+wxCreateHiddenWindow(LPCTSTR *pclassname, LPCTSTR classname, WNDPROC wndproc);
+
// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------
// we need to create a hidden window to receive the process termination
// notifications and for this we need a (Win) class name for it which we will
// register the first time it's needed
+static const wxChar *wxMSWEXEC_WNDCLASSNAME = wxT("_wxExecute_Internal_Class");
static const wxChar *gs_classForHiddenWindow = NULL;
+// event used to wake up threads waiting in wxExecuteThread
+static HANDLE gs_heventShutdown = NULL;
+
+// handles of all threads monitoring the execution of asynchronously running
+// processes
+static wxVector<HANDLE> gs_asyncThreads;
+
// ----------------------------------------------------------------------------
// private types
// ----------------------------------------------------------------------------
public:
~wxExecuteData()
{
-#ifndef __WIN16__
if ( !::CloseHandle(hProcess) )
{
wxLogLastError(wxT("CloseHandle(hProcess)"));
}
-#endif
}
HWND hWnd; // window to send wxWM_PROC_TERMINATED to
DWORD dwProcessId; // pid of the process
wxProcess *handler;
DWORD dwExitCode; // the exit code of the process
- bool state; // set to FALSE when the process finishes
+ bool state; // set to false when the process finishes
};
-#if defined(__WIN32__) && wxUSE_STREAMS
+class wxExecuteModule : public wxModule
+{
+public:
+ virtual bool OnInit() { return true; }
+ virtual void OnExit()
+ {
+ if ( gs_heventShutdown )
+ {
+ // stop any threads waiting for the termination of asynchronously
+ // running processes
+ if ( !::SetEvent(gs_heventShutdown) )
+ {
+ wxLogDebug(wxT("Failed to set shutdown event in wxExecuteModule"));
+ }
+
+ ::CloseHandle(gs_heventShutdown);
+ gs_heventShutdown = NULL;
+
+ // now wait until they terminate
+ if ( !gs_asyncThreads.empty() )
+ {
+ const size_t numThreads = gs_asyncThreads.size();
+
+ if ( ::WaitForMultipleObjects
+ (
+ numThreads,
+ &gs_asyncThreads[0],
+ TRUE, // wait for all of them to become signalled
+ 3000 // long but finite value
+ ) == WAIT_TIMEOUT )
+ {
+ wxLogDebug(wxT("Failed to stop all wxExecute monitor threads"));
+ }
+
+ for ( size_t n = 0; n < numThreads; n++ )
+ {
+ ::CloseHandle(gs_asyncThreads[n]);
+ }
+
+ gs_asyncThreads.clear();
+ }
+ }
+
+ if ( gs_classForHiddenWindow )
+ {
+ if ( !::UnregisterClass(wxMSWEXEC_WNDCLASSNAME, wxGetInstance()) )
+ {
+ wxLogLastError(wxT("UnregisterClass(wxExecClass)"));
+ }
+
+ gs_classForHiddenWindow = NULL;
+ }
+ }
+
+private:
+ DECLARE_DYNAMIC_CLASS(wxExecuteModule)
+};
+
+IMPLEMENT_DYNAMIC_CLASS(wxExecuteModule, wxModule)
+
+#if wxUSE_STREAMS && !defined(__WXWINCE__)
// ----------------------------------------------------------------------------
// wxPipeStreams
wxPipeInputStream(HANDLE hInput);
virtual ~wxPipeInputStream();
- // returns TRUE if the pipe is still opened
+ // returns true if the pipe is still opened
bool IsOpened() const { return m_hInput != INVALID_HANDLE_VALUE; }
- // returns TRUE if there is any data to be read from the pipe
+ // returns true if there is any data to be read from the pipe
virtual bool CanRead() const;
protected:
protected:
HANDLE m_hInput;
+
+ wxDECLARE_NO_COPY_CLASS(wxPipeInputStream);
};
class wxPipeOutputStream: public wxOutputStream
{
public:
wxPipeOutputStream(HANDLE hOutput);
- virtual ~wxPipeOutputStream();
+ virtual ~wxPipeOutputStream() { Close(); }
+ bool Close();
protected:
size_t OnSysWrite(const void *buffer, size_t len);
protected:
HANDLE m_hOutput;
+
+ wxDECLARE_NO_COPY_CLASS(wxPipeOutputStream);
};
// define this to let wxexec.cpp know that we know what we're doing
// default ctor doesn't do anything
wxPipe() { m_handles[Read] = m_handles[Write] = INVALID_HANDLE_VALUE; }
- // create the pipe, return TRUE if ok, FALSE on error
+ // create the pipe, return true if ok, false on error
bool Create()
{
// default secutiry attributes
{
wxLogSysError(_("Failed to create an anonymous pipe"));
- return FALSE;
+ return false;
}
- return TRUE;
+ return true;
}
- // return TRUE if we were created successfully
+ // return true if we were created successfully
bool IsOk() const { return m_handles[Read] != INVALID_HANDLE_VALUE; }
// return the descriptor for one of the pipe ends
- HANDLE operator[](Direction which) const
- {
- wxASSERT_MSG( which >= 0 && (size_t)which < WXSIZEOF(m_handles),
- _T("invalid pipe index") );
-
- return m_handles[which];
- }
+ HANDLE operator[](Direction which) const { return m_handles[which]; }
// detach a descriptor, meaning that the pipe dtor won't close it, and
// return it
HANDLE Detach(Direction which)
{
- wxASSERT_MSG( which >= 0 && (size_t)which < WXSIZEOF(m_handles),
- _T("invalid pipe index") );
-
HANDLE handle = m_handles[which];
m_handles[which] = INVALID_HANDLE_VALUE;
// implementation
// ============================================================================
-#ifdef __WIN32__
-
// ----------------------------------------------------------------------------
// process termination detecting support
// ----------------------------------------------------------------------------
{
wxExecuteData * const data = (wxExecuteData *)arg;
- if ( ::WaitForSingleObject(data->hProcess, INFINITE) != WAIT_OBJECT_0 )
+ // create the shutdown event if we're the first thread starting to wait
+ if ( !gs_heventShutdown )
{
- wxLogDebug(_T("Waiting for the process termination failed!"));
+ // create a manual initially non-signalled event object
+ gs_heventShutdown = ::CreateEvent(NULL, TRUE, FALSE, NULL);
+ if ( !gs_heventShutdown )
+ {
+ wxLogDebug(wxT("CreateEvent() in wxExecuteThread failed"));
+ }
}
- // get the exit code
- if ( !::GetExitCodeProcess(data->hProcess, &data->dwExitCode) )
+ HANDLE handles[2] = { data->hProcess, gs_heventShutdown };
+ switch ( ::WaitForMultipleObjects(2, handles, FALSE, INFINITE) )
{
- wxLogLastError(wxT("GetExitCodeProcess"));
- }
+ case WAIT_OBJECT_0:
+ // process terminated, get its exit code
+ if ( !::GetExitCodeProcess(data->hProcess, &data->dwExitCode) )
+ {
+ wxLogLastError(wxT("GetExitCodeProcess"));
+ }
+
+ wxASSERT_MSG( data->dwExitCode != STILL_ACTIVE,
+ wxT("process should have terminated") );
+
+ // send a message indicating process termination to the window
+ ::SendMessage(data->hWnd, wxWM_PROC_TERMINATED, 0, (LPARAM)data);
+ break;
- wxASSERT_MSG( data->dwExitCode != STILL_ACTIVE,
- wxT("process should have terminated") );
+ case WAIT_OBJECT_0 + 1:
+ // we're shutting down but the process is still running -- leave it
+ // run but clean up the associated data
+ if ( !data->state )
+ {
+ delete data;
+ }
+ //else: exiting while synchronously executing process is still
+ // running? this shouldn't happen...
+ break;
- // send a message indicating process termination to the window
- ::SendMessage(data->hWnd, wxWM_PROC_TERMINATED, 0, (LPARAM)data);
+ default:
+ wxLogDebug(wxT("Waiting for the process termination failed!"));
+ }
return 0;
}
{
// we're executing synchronously, tell the waiting thread
// that the process finished
- data->state = 0;
+ data->state = false;
}
else
{
// implementation of IO redirection support classes
// ============================================================================
-#if wxUSE_STREAMS
+#if wxUSE_STREAMS && !defined(__WXWINCE__)
// ----------------------------------------------------------------------------
// wxPipeInputStreams
bool wxPipeInputStream::CanRead() const
{
- // FIXME
-#ifdef __WXWINE__
- return FALSE;
-#else // !Wine
+ // we can read if there's something in the put back buffer
+ // even pipe is closed
+ if ( m_wbacksize > m_wbackcur )
+ return true;
+
+ wxPipeInputStream * const self = wxConstCast(this, wxPipeInputStream);
+
if ( !IsOpened() )
- return FALSE;
+ {
+ // set back to mark Eof as it may have been unset by Ungetch()
+ self->m_lasterror = wxSTREAM_EOF;
+ return false;
+ }
DWORD nAvailable;
if ( ::GetLastError() != ERROR_BROKEN_PIPE )
{
// unexpected error
- wxLogLastError(_T("PeekNamedPipe"));
+ wxLogLastError(wxT("PeekNamedPipe"));
}
- // don't try to continue reading from a pipe if an error occured or if
+ // don't try to continue reading from a pipe if an error occurred or if
// it had been closed
::CloseHandle(m_hInput);
- wxPipeInputStream *self = wxConstCast(this, wxPipeInputStream);
-
self->m_hInput = INVALID_HANDLE_VALUE;
self->m_lasterror = wxSTREAM_EOF;
}
return nAvailable != 0;
-#endif // Wine/!Wine
}
size_t wxPipeInputStream::OnSysRead(void *buffer, size_t len)
: wxSTREAM_READ_ERROR;
}
- // bytesRead is set to 0, as desired, if an error occured
+ // bytesRead is set to 0, as desired, if an error occurred
return bytesRead;
}
wxPipeOutputStream::wxPipeOutputStream(HANDLE hOutput)
{
m_hOutput = hOutput;
+
+ // unblock the pipe to prevent deadlocks when we're writing to the pipe
+ // from which the child process can't read because it is writing in its own
+ // end of it
+ DWORD mode = PIPE_READMODE_BYTE | PIPE_NOWAIT;
+ if ( !::SetNamedPipeHandleState
+ (
+ m_hOutput,
+ &mode,
+ NULL, // collection count (we don't set it)
+ NULL // timeout (we don't set it neither)
+ ) )
+ {
+ wxLogLastError(wxT("SetNamedPipeHandleState(PIPE_NOWAIT)"));
+ }
}
-wxPipeOutputStream::~wxPipeOutputStream()
+bool wxPipeOutputStream::Close()
{
- ::CloseHandle(m_hOutput);
+ return ::CloseHandle(m_hOutput) != 0;
}
+
size_t wxPipeOutputStream::OnSysWrite(const void *buffer, size_t len)
{
- DWORD bytesWritten;
-
m_lasterror = wxSTREAM_NO_ERROR;
- if ( !::WriteFile(m_hOutput, buffer, len, &bytesWritten, NULL) )
+
+ DWORD totalWritten = 0;
+ while ( len > 0 )
{
- m_lasterror = ::GetLastError() == ERROR_BROKEN_PIPE
- ? wxSTREAM_EOF
- : wxSTREAM_WRITE_ERROR;
+ DWORD chunkWritten;
+ if ( !::WriteFile(m_hOutput, buffer, len, &chunkWritten, NULL) )
+ {
+ m_lasterror = ::GetLastError() == ERROR_BROKEN_PIPE
+ ? wxSTREAM_EOF
+ : wxSTREAM_WRITE_ERROR;
+ break;
+ }
+
+ if ( !chunkWritten )
+ break;
+
+ buffer = (char *)buffer + chunkWritten;
+ totalWritten += chunkWritten;
+ len -= chunkWritten;
}
- return bytesWritten;
+ return totalWritten;
}
#endif // wxUSE_STREAMS
-#endif // Win32
-
// ============================================================================
// wxExecute functions family
// ============================================================================
#if wxUSE_IPC
// connect to the given server via DDE and ask it to execute the command
-static bool wxExecuteDDE(const wxString& ddeServer,
- const wxString& ddeTopic,
- const wxString& ddeCommand)
+bool
+wxExecuteDDE(const wxString& ddeServer,
+ const wxString& ddeTopic,
+ const wxString& ddeCommand)
{
- bool ok = FALSE;
+ bool ok wxDUMMY_INITIALIZE(false);
wxDDEClient client;
- wxConnectionBase *conn = client.MakeConnection(_T(""),
- ddeServer,
- ddeTopic);
+ wxConnectionBase *
+ conn = client.MakeConnection(wxEmptyString, ddeServer, ddeTopic);
if ( !conn )
{
- ok = FALSE;
+ ok = false;
}
else // connected to DDE server
{
- // the added complication here is that although most
- // programs use XTYP_EXECUTE for their DDE API, some
- // important ones - like IE and other MS stuff - use
- // XTYP_REQUEST!
+ // the added complication here is that although most programs use
+ // XTYP_EXECUTE for their DDE API, some important ones -- like Word
+ // and other MS stuff - use XTYP_REQUEST!
//
- // so we try one first and then the other one if it
- // failed
+ // moreover, anotheri mportant program (IE) understands both but
+ // returns an error from Execute() so we must try Request() first
+ // to avoid doing it twice
{
+ // we're prepared for this one to fail, so don't show errors
wxLogNull noErrors;
- ok = conn->Execute(ddeCommand);
+
+ ok = conn->Request(ddeCommand) != NULL;
}
if ( !ok )
{
- // now try request - but show the errors
- ok = conn->Request(ddeCommand) != NULL;
+ // now try execute -- but show the errors
+ ok = conn->Execute(ddeCommand);
}
}
long wxExecute(const wxString& cmd, int flags, wxProcess *handler)
{
- wxCHECK_MSG( !!cmd, 0, wxT("empty command in wxExecute") );
+ wxCHECK_MSG( !cmd.empty(), 0, wxT("empty command in wxExecute") );
+
+#if wxUSE_THREADS
+ // for many reasons, the code below breaks down if it's called from another
+ // thread -- this could be fixed, but as Unix versions don't support this
+ // neither I don't want to waste time on this now
+ wxASSERT_MSG( wxThread::IsMain(),
+ wxT("wxExecute() can be called only from the main thread") );
+#endif // wxUSE_THREADS
wxString command;
// case we execute just <command> and process the rest below
wxString ddeServer, ddeTopic, ddeCommand;
static const size_t lenDdePrefix = 7; // strlen("WX_DDE:")
- if ( cmd.Left(lenDdePrefix) == _T("WX_DDE#") )
+ if ( cmd.Left(lenDdePrefix) == wxT("WX_DDE#") )
{
// speed up the concatenations below
ddeServer.reserve(256);
ddeCommand.reserve(256);
const wxChar *p = cmd.c_str() + 7;
- while ( *p && *p != _T('#') )
+ while ( *p && *p != wxT('#') )
{
command += *p++;
}
}
else
{
- wxFAIL_MSG(_T("invalid WX_DDE command in wxExecute"));
+ wxFAIL_MSG(wxT("invalid WX_DDE command in wxExecute"));
}
- while ( *p && *p != _T('#') )
+ while ( *p && *p != wxT('#') )
{
ddeServer += *p++;
}
}
else
{
- wxFAIL_MSG(_T("invalid WX_DDE command in wxExecute"));
+ wxFAIL_MSG(wxT("invalid WX_DDE command in wxExecute"));
}
- while ( *p && *p != _T('#') )
+ while ( *p && *p != wxT('#') )
{
ddeTopic += *p++;
}
}
else
{
- wxFAIL_MSG(_T("invalid WX_DDE command in wxExecute"));
+ wxFAIL_MSG(wxT("invalid WX_DDE command in wxExecute"));
}
while ( *p )
command = cmd;
}
-#if defined(__WIN32__) && !defined(__TWIN32__)
-
// the IO redirection is only supported with wxUSE_STREAMS
BOOL redirect = FALSE;
-#if wxUSE_STREAMS
+#if wxUSE_STREAMS && !defined(__WXWINCE__)
wxPipe pipeIn, pipeOut, pipeErr;
// we'll save here the copy of pipeIn[Write]
wxZeroMemory(si);
si.cb = sizeof(si);
-#if wxUSE_STREAMS
+#if wxUSE_STREAMS && !defined(__WXWINCE__)
if ( redirect )
{
si.dwFlags = STARTF_USESTDHANDLES;
DUPLICATE_SAME_ACCESS // same access as for src handle
) )
{
- wxLogLastError(_T("DuplicateHandle"));
+ wxLogLastError(wxT("DuplicateHandle"));
}
::CloseHandle(pipeInWrite);
#endif // wxUSE_STREAMS
PROCESS_INFORMATION pi;
- DWORD dwFlags = CREATE_DEFAULT_ERROR_MODE | CREATE_SUSPENDED;
+ DWORD dwFlags = CREATE_SUSPENDED;
+
+#ifndef __WXWINCE__
+ dwFlags |= CREATE_DEFAULT_ERROR_MODE ;
+#else
+ // we are assuming commands without spaces for now
+ wxString moduleName = command.BeforeFirst(wxT(' '));
+ wxString arguments = command.AfterFirst(wxT(' '));
+#endif
bool ok = ::CreateProcess
(
- NULL, // application name (use only cmd line)
+ // WinCE requires appname to be non null
+ // Win32 allows for null
+#ifdef __WXWINCE__
+ (wxChar *)
+ moduleName.wx_str(),// application name
(wxChar *)
- command.c_str(), // full command line
- NULL, // security attributes: defaults for both
- NULL, // the process and its main thread
- redirect, // inherit handles if we use pipes
- dwFlags, // process creation flags
- NULL, // environment (use the same)
- NULL, // current directory (use the same)
- &si, // startup info (unused here)
- &pi // process info
+ arguments.wx_str(), // arguments
+#else
+ NULL, // application name (use only cmd line)
+ (wxChar *)
+ command.wx_str(), // full command line
+#endif
+ NULL, // security attributes: defaults for both
+ NULL, // the process and its main thread
+ redirect, // inherit handles if we use pipes
+ dwFlags, // process creation flags
+ NULL, // environment (use the same)
+ NULL, // current directory (use the same)
+ &si, // startup info (unused here)
+ &pi // process info
) != 0;
-#if wxUSE_STREAMS
+#if wxUSE_STREAMS && !defined(__WXWINCE__)
// we can close the pipe ends used by child anyhow
if ( redirect )
{
if ( !ok )
{
-#if wxUSE_STREAMS
+#if wxUSE_STREAMS && !defined(__WXWINCE__)
// close the other handles too
if ( redirect )
{
return flags & wxEXEC_SYNC ? -1 : 0;
}
-#if wxUSE_STREAMS
+#if wxUSE_STREAMS && !defined(__WXWINCE__)
// the input buffer bufOut is connected to stdout, this is why it is
// called bufOut and not bufIn
wxStreamTempInputBuffer bufOut,
}
#endif // wxUSE_STREAMS
- // register the class for the hidden window used for the notifications
- if ( !gs_classForHiddenWindow )
- {
- gs_classForHiddenWindow = _T("wxHiddenWindow");
-
- WNDCLASS wndclass;
- wxZeroMemory(wndclass);
- wndclass.lpfnWndProc = (WNDPROC)wxExecuteWindowCbk;
- wndclass.hInstance = wxGetInstance();
- wndclass.lpszClassName = gs_classForHiddenWindow;
-
- if ( !::RegisterClass(&wndclass) )
- {
- wxLogLastError(wxT("RegisterClass(hidden window)"));
- }
- }
-
// create a hidden window to receive notification about process
// termination
- HWND hwnd = ::CreateWindow(gs_classForHiddenWindow, NULL,
- WS_OVERLAPPEDWINDOW,
- 0, 0, 0, 0, NULL,
- (HMENU)NULL, wxGetInstance(), 0);
+ HWND hwnd = wxCreateHiddenWindow
+ (
+ &gs_classForHiddenWindow,
+ wxMSWEXEC_WNDCLASSNAME,
+ (WNDPROC)wxExecuteWindowCbk
+ );
+
wxASSERT_MSG( hwnd, wxT("can't create a hidden window for wxExecute") );
// Alloc data
{
// may be NULL or not
data->handler = handler;
+
+ if (handler)
+ handler->SetPid(pi.dwProcessId);
}
DWORD tid;
// close unneeded handle
if ( !::CloseHandle(pi.hThread) )
+ {
wxLogLastError(wxT("CloseHandle(hThread)"));
+ }
if ( !hThread )
{
return pi.dwProcessId;
}
- ::CloseHandle(hThread);
+ gs_asyncThreads.push_back(hThread);
-#if wxUSE_IPC
+#if wxUSE_IPC && !defined(__WXWINCE__)
// second part of DDE hack: now establish the DDE conversation with the
// just launched process
if ( !ddeServer.empty() )
switch ( ::WaitForInputIdle(pi.hProcess, 10000 /* 10 seconds */) )
{
default:
- wxFAIL_MSG( _T("unexpected WaitForInputIdle() return code") );
+ wxFAIL_MSG( wxT("unexpected WaitForInputIdle() return code") );
// fall through
case -1:
- wxLogLastError(_T("WaitForInputIdle() in wxExecute"));
+ wxLogLastError(wxT("WaitForInputIdle() in wxExecute"));
case WAIT_TIMEOUT:
- wxLogDebug(_T("Timeout too small in WaitForInputIdle"));
+ wxLogDebug(wxT("Timeout too small in WaitForInputIdle"));
- ok = FALSE;
+ ok = false;
break;
case 0:
// ok, process ready to accept DDE requests
ok = wxExecuteDDE(ddeServer, ddeTopic, ddeCommand);
}
+
+ if ( !ok )
+ {
+ wxLogDebug(wxT("Failed to send DDE request to the process \"%s\"."),
+ cmd.c_str());
+ }
}
#endif // wxUSE_IPC
return pi.dwProcessId;
}
- // disable all app windows while waiting for the child process to finish
-#if wxUSE_GUI
-
- /*
- We use a dirty hack here to disable all application windows (which we
- must do because otherwise the calls to wxYield() could lead to some very
- unexpected reentrancies in the users code) but to avoid losing
- focus/activation entirely when the child process terminates which would
- happen if we simply disabled everything using wxWindowDisabler. Indeed,
- remember that Windows will never activate a disabled window and when the
- last childs window is closed and Windows looks for a window to activate
- all our windows are still disabled. There is no way to enable them in
- time because we don't know when the childs windows are going to be
- closed, so the solution we use here is to keep one special tiny frame
- enabled all the time. Then when the child terminates it will get
- activated and when we close it below -- after reenabling all the other
- windows! -- the previously active window becomes activated again and
- everything is ok.
- */
- wxWindow *winActive;
- {
- wxBusyCursor bc;
-
- // first disable all existing windows
- wxWindowDisabler wd;
-
- // then create an "invisible" frame: it has minimal size, is positioned
- // (hopefully) outside the screen and doesn't appear on the taskbar
- winActive = new wxFrame
- (
- wxTheApp->GetTopWindow(),
- -1,
- _T(""),
- wxPoint(32600, 32600),
- wxSize(1, 1),
- wxDEFAULT_FRAME_STYLE | wxFRAME_NO_TASKBAR
- );
- winActive->Show();
-#endif // wxUSE_GUI
-
- // wait until the child process terminates
- while ( data->state )
- {
-#if wxUSE_STREAMS
- bufOut.Update();
- bufErr.Update();
-#endif // wxUSE_STREAMS
+ wxAppTraits *traits = wxTheApp ? wxTheApp->GetTraits() : NULL;
+ wxCHECK_MSG( traits, -1, wxT("no wxAppTraits in wxExecute()?") );
+
+ void *cookie = NULL;
+ if ( !(flags & wxEXEC_NODISABLE) )
+ {
+ // disable all app windows while waiting for the child process to finish
+ cookie = traits->BeforeChildWaitLoop();
+ }
+ // wait until the child process terminates
+ while ( data->state )
+ {
+#if wxUSE_STREAMS && !defined(__WXWINCE__)
+ if ( !bufOut.Update() && !bufErr.Update() )
+#endif // wxUSE_STREAMS
+ {
// don't eat 100% of the CPU -- ugly but anything else requires
// real async IO which we don't have for the moment
::Sleep(50);
-
-#if wxUSE_GUI
- // repaint the GUI
- wxYield();
-#else // !GUI
- // dispatch the messages to the hidden window so that it could
- // process the wxWM_PROC_TERMINATED notification
- MSG msg;
- ::PeekMessage(&msg, hwnd, 0, 0, PM_REMOVE);
-#endif // GUI/!GUI
}
-#if wxUSE_GUI
+ // we must always process messages for our hidden window or we'd never
+ // get wxWM_PROC_TERMINATED and so this loop would never terminate
+ MSG msg;
+ ::PeekMessage(&msg, data->hWnd, 0, 0, PM_REMOVE);
+
+ // we may also need to process messages for all the other application
+ // windows
+ if ( !(flags & wxEXEC_NOEVENTS) )
+ {
+ wxEventLoopBase * const loop = wxEventLoopBase::GetActive();
+ if ( loop )
+ loop->Yield();
+ }
}
- // finally delete the dummy frame and, as wd has been already destroyed and
- // the other windows reenabled, the activation is going to return to the
- // window which had it before
- winActive->Destroy();
-#endif // wxUSE_GUI
+ if ( !(flags & wxEXEC_NODISABLE) )
+ {
+ // reenable disabled windows back
+ traits->AfterChildWaitLoop(cookie);
+ }
DWORD dwExitCode = data->dwExitCode;
delete data;
// return the exit code
return dwExitCode;
-#else // Win16
- long instanceID = WinExec((LPCSTR) WXSTRINGCAST command, SW_SHOW);
- if (instanceID < 32)
- return flags & wxEXEC_SYNC ? -1 : 0;
-
- if ( flags & wxEXEC_SYNC )
- {
- int running;
- do
- {
- wxYield();
- running = GetModuleUsage((HINSTANCE)instanceID);
- } while (running);
- }
-
- return instanceID;
-#endif // Win16/32
}
-long wxExecute(wxChar **argv, int flags, wxProcess *handler)
+template <typename CharType>
+long wxExecuteImpl(CharType **argv, int flags, wxProcess *handler)
{
wxString command;
+ command.reserve(1024);
+ wxString arg;
for ( ;; )
{
- command += *argv++;
+ arg = *argv++;
+
+ bool quote;
+ if ( arg.empty() )
+ {
+ // we need to quote empty arguments, otherwise they'd just
+ // disappear
+ quote = true;
+ }
+ else // non-empty
+ {
+ // escape any quotes present in the string to avoid interfering
+ // with the command line parsing in the child process
+ arg.Replace("\"", "\\\"", true /* replace all */);
+
+ // and quote any arguments containing the spaces to prevent them from
+ // being broken down
+ quote = arg.find_first_of(" \t") != wxString::npos;
+ }
+
+ if ( quote )
+ command += '\"' + arg + '\"';
+ else
+ command += arg;
+
if ( !*argv )
break;
- command += _T(' ');
+ command += ' ';
}
return wxExecute(command, flags, handler);
}
+long wxExecute(char **argv, int flags, wxProcess *handler)
+{
+ return wxExecuteImpl(argv, flags, handler);
+}
+
+#if wxUSE_UNICODE
+
+long wxExecute(wchar_t **argv, int flags, wxProcess *handler)
+{
+ return wxExecuteImpl(argv, flags, handler);
+}
+
+#endif // wxUSE_UNICODE
projects / wxWidgets.git / blobdiff