initial commit

Signed-off-by: Peter Siegmund <mars3142@noreply.mars3142.dev>

libs/wxWidgets-3.3.1/include/wx/unix/private/execute.h

@@ -0,0 +1,102 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        wx/unix/private/execute.h
+// Purpose:     private details of wxExecute() implementation
+// Author:      Vadim Zeitlin
+// 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
+
+#include "wx/app.h"
+#include "wx/process.h"
+
+#if wxUSE_STREAMS
+    #include "wx/unix/pipe.h"
+    #include "wx/private/streamtempinput.h"
+#endif
+
+#include <unordered_map>
+
+class wxEventLoopBase;
+
+// Information associated with a running child process.
+class wxExecuteData
+{
+public:
+    wxExecuteData()
+    {
+        m_flags =
+        m_pid = 0;
+        m_exitcode = -1;
+
+        m_process = nullptr;
+
+        m_syncEventLoop = nullptr;
+
+#if wxUSE_STREAMS
+        m_fdOut =
+        m_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 m_process && m_process->IsRedirected(); }
+
+
+    // wxExecute() flags
+    int m_flags;
+
+    // the pid of the child process
+    int m_pid;
+
+    // The exit code of the process, set once the child terminates.
+    int m_exitcode;
+
+    // the associated process object or nullptr
+    wxProcess *m_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 *m_syncEventLoop;
+
+#if wxUSE_STREAMS
+    // the input buffer bufOut is connected to stdout, this is why it is
+    // called bufOut and not bufIn
+    wxStreamTempInputBuffer m_bufOut,
+                            m_bufErr;
+
+    // the corresponding FDs, -1 if not redirected
+    int m_fdOut,
+        m_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.
+    using ChildProcessesData = std::unordered_map<int, wxExecuteData*>;
+    static ChildProcessesData ms_childProcesses;
+
+    wxDECLARE_NO_COPY_CLASS(wxExecuteData);
+};
+
+#endif // _WX_UNIX_EXECUTE_H