/////////////////////////////////////////////////////////////////////////////
-// Name: unix/execute.h
+// Name: wx/unix/execute.h
// Purpose: private details of wxExecute() implementation
// Author: Vadim Zeitlin
// Id: $Id$
// Copyright: (c) 1998 Robert Roebling, Julian Smart, Vadim Zeitlin
+// (c) 2013 Vadim Zeitlin
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_UNIX_EXECUTE_H
#define _WX_UNIX_EXECUTE_H
-// if pid > 0, the execution is async and the data is freed in the callback
-// executed when the process terminates, if pid < 0, the execution is
-// synchronous and the caller (wxExecute) frees the data
-struct wxEndProcessData
+#include "wx/app.h"
+#include "wx/hashmap.h"
+#include "wx/process.h"
+
+#include "wx/unix/pipe.h"
+#include "wx/private/streamtempinput.h"
+
+class wxEventLoopBase;
+
+// Information associated with a running child process.
+class wxExecuteData
{
- int pid, // pid of the process
- tag; // port dependent value
- wxProcess *process; // if !NULL: notified on process termination
- int exitcode; // the exit code
-};
+public:
+ wxExecuteData()
+ {
+ flags =
+ pid = 0;
+ exitcode = -1;
+
+ process = NULL;
+
+ syncEventLoop = NULL;
+
+#if wxUSE_STREAMS
+ fdOut =
+ fdErr = wxPipe::INVALID_FD;
+#endif // wxUSE_STREAMS
+ }
+
+ // This must be called in the parent process as soon as fork() returns to
+ // update us with the effective child PID. It also ensures that we handle
+ // SIGCHLD to be able to detect when this PID exits, so wxTheApp must be
+ // available.
+ void OnStart(int pid);
+
+ // Called when the child process exits.
+ void OnExit(int exitcode);
+
+ // Return true if we should (or already did) redirect the child IO.
+ bool IsRedirected() const { return process && process->IsRedirected(); }
+
-// this function is called when the process terminates from port specific
-// callback function and is common to all ports (src/unix/utilsunx.cpp)
-extern void wxHandleProcessTermination(wxEndProcessData *proc_data);
+ // wxExecute() flags
+ int flags;
-// this function is called to associate the port-specific callback with the
-// child process. The return valus is port-specific.
-extern int wxAddProcessCallback(wxEndProcessData *proc_data, int fd);
-// For ports (e.g. DARWIN) which can add callbacks based on the pid
-extern int wxAddProcessCallbackForPid(wxEndProcessData *proc_data, int pid);
+ // the pid of the child process
+ int pid;
+
+ // The exit code of the process, set once the child terminates.
+ int exitcode;
+
+ // the associated process object or NULL
+ wxProcess *process;
+
+ // Local event loop used to wait for the child process termination in
+ // synchronous execution case. We can't create it ourselves as its exact
+ // type depends on the application kind (console/GUI), so we rely on
+ // wxAppTraits setting up this pointer to point to the appropriate object.
+ wxEventLoopBase *syncEventLoop;
+
+#if wxUSE_STREAMS
+ // the input buffer bufOut is connected to stdout, this is why it is
+ // called bufOut and not bufIn
+ wxStreamTempInputBuffer bufOut,
+ bufErr;
+
+ // the corresponding FDs, -1 if not redirected
+ int fdOut,
+ fdErr;
+#endif // wxUSE_STREAMS
+
+
+private:
+ // SIGCHLD signal handler that checks whether any of the currently running
+ // children have exited.
+ static void OnSomeChildExited(int sig);
+
+ // All currently running child processes indexed by their PID.
+ //
+ // Notice that the container doesn't own its elements.
+ WX_DECLARE_HASH_MAP(int, wxExecuteData*, wxIntegerHash, wxIntegerEqual,
+ ChildProcessesData);
+ static ChildProcessesData ms_childProcesses;
+
+ wxDECLARE_NO_COPY_CLASS(wxExecuteData);
+};
#endif // _WX_UNIX_EXECUTE_H
projects / wxWidgets.git / blobdiff