X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/b4da152ea3ec3968fb2f304b6ed73e0279c19506..aa926768a9329b4eb4804c89de8da2061549708d:/src/msw/utilsexc.cpp diff --git a/src/msw/utilsexc.cpp b/src/msw/utilsexc.cpp index 3db9fa1419..8e86fb663c 100644 --- a/src/msw/utilsexc.cpp +++ b/src/msw/utilsexc.cpp @@ -1,12 +1,12 @@ ///////////////////////////////////////////////////////////////////////////// -// 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 ///////////////////////////////////////////////////////////////////////////// // ============================================================================ @@ -17,10 +17,6 @@ // headers // ---------------------------------------------------------------------------- -#ifdef __GNUG__ - #pragma implementation -#endif - // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" @@ -33,38 +29,43 @@ #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 -#if !defined(__GNUWIN32__) && !defined(__SALFORDC__) && !defined(__WXMICROWIN__) +#if !defined(__GNUWIN32__) && !defined(__WXMICROWIN__) && !defined(__WXWINCE__) #include #ifndef __MWERKS__ #include #endif #endif -#if defined(__GNUWIN32__) && !defined(__TWIN32__) +#if defined(__GNUWIN32__) #include #include #endif -#if defined(__WIN32__) && !defined(__WXMICROWIN__) -#include +#if !defined(__WXMICROWIN__) && !defined(__WXWINCE__) + #ifndef __UNIX__ + #include + #endif -#ifndef __GNUWIN32__ -#include -#endif + #ifndef __GNUWIN32__ + #include + #endif #endif #include @@ -81,6 +82,10 @@ #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 // ---------------------------------------------------------------------------- @@ -95,8 +100,16 @@ // 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 gs_asyncThreads; + // ---------------------------------------------------------------------------- // private types // ---------------------------------------------------------------------------- @@ -107,12 +120,10 @@ struct wxExecuteData public: ~wxExecuteData() { -#ifndef __WIN16__ if ( !::CloseHandle(hProcess) ) { wxLogLastError(wxT("CloseHandle(hProcess)")); } -#endif } HWND hWnd; // window to send wxWM_PROC_TERMINATED to @@ -120,10 +131,70 @@ public: 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 +}; + +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) }; -#if defined(__WIN32__) && wxUSE_STREAMS +IMPLEMENT_DYNAMIC_CLASS(wxExecuteModule, wxModule) + +#if wxUSE_STREAMS && !defined(__WXWINCE__) // ---------------------------------------------------------------------------- // wxPipeStreams @@ -135,10 +206,10 @@ public: 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: @@ -147,14 +218,15 @@ protected: protected: HANDLE m_hInput; - DECLARE_NO_COPY_CLASS(wxPipeInputStream) + 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); @@ -162,7 +234,7 @@ protected: protected: HANDLE m_hOutput; - DECLARE_NO_COPY_CLASS(wxPipeOutputStream) + wxDECLARE_NO_COPY_CLASS(wxPipeOutputStream); }; // define this to let wxexec.cpp know that we know what we're doing @@ -186,7 +258,7 @@ public: // 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 @@ -200,31 +272,22 @@ public: { 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; @@ -257,8 +320,6 @@ private: // implementation // ============================================================================ -#ifdef __WIN32__ - // ---------------------------------------------------------------------------- // process termination detecting support // ---------------------------------------------------------------------------- @@ -268,22 +329,48 @@ static DWORD __stdcall wxExecuteThread(void *arg) { 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; } @@ -308,7 +395,7 @@ LRESULT APIENTRY _EXPORT wxExecuteWindowCbk(HWND hWnd, UINT message, { // we're executing synchronously, tell the waiting thread // that the process finished - data->state = 0; + data->state = false; } else { @@ -328,7 +415,7 @@ LRESULT APIENTRY _EXPORT wxExecuteWindowCbk(HWND hWnd, UINT message, // implementation of IO redirection support classes // ============================================================================ -#if wxUSE_STREAMS +#if wxUSE_STREAMS && !defined(__WXWINCE__) // ---------------------------------------------------------------------------- // wxPipeInputStreams @@ -347,8 +434,19 @@ wxPipeInputStream::~wxPipeInputStream() bool wxPipeInputStream::CanRead() const { + // 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; @@ -367,15 +465,13 @@ bool wxPipeInputStream::CanRead() const 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; @@ -402,7 +498,7 @@ 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; } @@ -413,32 +509,58 @@ size_t wxPipeInputStream::OnSysRead(void *buffer, size_t len) 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 // ============================================================================ @@ -446,38 +568,40 @@ size_t wxPipeOutputStream::OnSysWrite(const void *buffer, size_t len) #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); } } @@ -488,7 +612,15 @@ static bool wxExecuteDDE(const wxString& ddeServer, 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; @@ -503,7 +635,7 @@ long wxExecute(const wxString& cmd, int flags, wxProcess *handler) // case we execute just 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); @@ -511,7 +643,7 @@ long wxExecute(const wxString& cmd, int flags, wxProcess *handler) ddeCommand.reserve(256); const wxChar *p = cmd.c_str() + 7; - while ( *p && *p != _T('#') ) + while ( *p && *p != wxT('#') ) { command += *p++; } @@ -523,10 +655,10 @@ long wxExecute(const wxString& cmd, int flags, wxProcess *handler) } 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++; } @@ -538,10 +670,10 @@ long wxExecute(const wxString& cmd, int flags, wxProcess *handler) } 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++; } @@ -553,7 +685,7 @@ long wxExecute(const wxString& cmd, int flags, wxProcess *handler) } else { - wxFAIL_MSG(_T("invalid WX_DDE command in wxExecute")); + wxFAIL_MSG(wxT("invalid WX_DDE command in wxExecute")); } while ( *p ) @@ -584,12 +716,10 @@ long wxExecute(const wxString& cmd, int flags, wxProcess *handler) 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] @@ -617,7 +747,7 @@ long wxExecute(const wxString& cmd, int flags, wxProcess *handler) wxZeroMemory(si); si.cb = sizeof(si); -#if wxUSE_STREAMS +#if wxUSE_STREAMS && !defined(__WXWINCE__) if ( redirect ) { si.dwFlags = STARTF_USESTDHANDLES; @@ -652,7 +782,7 @@ long wxExecute(const wxString& cmd, int flags, wxProcess *handler) DUPLICATE_SAME_ACCESS // same access as for src handle ) ) { - wxLogLastError(_T("DuplicateHandle")); + wxLogLastError(wxT("DuplicateHandle")); } ::CloseHandle(pipeInWrite); @@ -660,24 +790,41 @@ long wxExecute(const wxString& cmd, int flags, wxProcess *handler) #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 *) + arguments.wx_str(), // arguments +#else + NULL, // application name (use only cmd line) (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 + 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 ) { @@ -689,7 +836,7 @@ long wxExecute(const wxString& cmd, int flags, wxProcess *handler) if ( !ok ) { -#if wxUSE_STREAMS +#if wxUSE_STREAMS && !defined(__WXWINCE__) // close the other handles too if ( redirect ) { @@ -703,7 +850,7 @@ long wxExecute(const wxString& cmd, int flags, wxProcess *handler) 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, @@ -726,29 +873,15 @@ long wxExecute(const wxString& cmd, int flags, wxProcess *handler) } #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 @@ -767,6 +900,9 @@ long wxExecute(const wxString& cmd, int flags, wxProcess *handler) { // may be NULL or not data->handler = handler; + + if (handler) + handler->SetPid(pi.dwProcessId); } DWORD tid; @@ -787,7 +923,9 @@ long wxExecute(const wxString& cmd, int flags, wxProcess *handler) // close unneeded handle if ( !::CloseHandle(pi.hThread) ) + { wxLogLastError(wxT("CloseHandle(hThread)")); + } if ( !hThread ) { @@ -800,9 +938,9 @@ long wxExecute(const wxString& cmd, int flags, wxProcess *handler) 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() ) @@ -817,22 +955,28 @@ long wxExecute(const wxString& cmd, int flags, wxProcess *handler) 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 @@ -844,115 +988,109 @@ long wxExecute(const wxString& cmd, int flags, wxProcess *handler) 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 +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