initial commit

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

libs/wxWidgets-3.3.1/include/wx/private/selectdispatcher.h

@@ -0,0 +1,125 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        wx/private/selectdispatcher.h
+// Purpose:     wxSelectDispatcher class
+// Authors:     Lukasz Michalski and Vadim Zeitlin
+// Created:     December 2006
+// Copyright:   (c) Lukasz Michalski
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_PRIVATE_SELECTDISPATCHER_H_
+#define _WX_PRIVATE_SELECTDISPATCHER_H_
+
+#include "wx/defs.h"
+
+#if wxUSE_SELECT_DISPATCHER
+
+#if defined(HAVE_SYS_SELECT_H)
+    #include <sys/time.h>
+    #include <sys/select.h>
+#endif
+
+#include <sys/types.h>
+
+#include "wx/thread.h"
+#include "wx/private/fdiodispatcher.h"
+
+// helper class storing all the select() fd sets
+class WXDLLIMPEXP_BASE wxSelectSets
+{
+public:
+    // ctor zeroes out all fd_sets
+    wxSelectSets();
+
+    // default copy ctor, assignment operator and dtor are ok
+
+
+    // return true if fd appears in any of the sets
+    bool HasFD(int fd) const;
+
+    // add or remove FD to our sets depending on whether flags contains
+    // wxFDIO_INPUT/OUTPUT/EXCEPTION bits
+    bool SetFD(int fd, int flags);
+
+    // same as SetFD() except it unsets the bits set in the flags for the given
+    // fd
+    bool ClearFD(int fd)
+    {
+        return SetFD(fd, 0);
+    }
+
+
+    // call select() with our sets: the other parameters are the same as for
+    // select() itself
+    int Select(int nfds, struct timeval *tv);
+
+    // call the handler methods corresponding to the sets having this fd if it
+    // is present in any set and return true if it is
+    bool Handle(int fd, wxFDIOHandler& handler) const;
+
+private:
+    typedef void (wxFDIOHandler::*Callback)();
+
+    // the FD sets indices
+    enum
+    {
+        Read,
+        Write,
+        Except,
+        Max
+    };
+
+    // the sets used with select()
+    fd_set m_fds[Max];
+
+    // the wxFDIO_XXX flags, functions and names (used for debug messages only)
+    // corresponding to the FD sets above
+    static int ms_flags[Max];
+    static const char *ms_names[Max];
+    static Callback ms_handlers[Max];
+};
+
+class WXDLLIMPEXP_BASE wxSelectDispatcher : public wxMappedFDIODispatcher
+{
+public:
+    // default ctor
+    wxSelectDispatcher() { m_maxFD = -1; }
+
+    // implement pure virtual methods of the base class
+    virtual bool RegisterFD(int fd, wxFDIOHandler *handler, int flags = wxFDIO_ALL) override;
+    virtual bool ModifyFD(int fd, wxFDIOHandler *handler, int flags = wxFDIO_ALL) override;
+    virtual bool UnregisterFD(int fd) override;
+    virtual bool HasPending() const override;
+    virtual int Dispatch(int timeout = TIMEOUT_INFINITE) override;
+
+private:
+    // common part of RegisterFD() and ModifyFD()
+    bool DoUpdateFDAndHandler(int fd, wxFDIOHandler *handler, int flags);
+
+    // call the handlers for the fds present in the given sets, return the
+    // number of handlers we called
+    int ProcessSets(const wxSelectSets& sets);
+
+    // helper of ProcessSets(): call the handler if its fd is in the set
+    void DoProcessFD(int fd, const fd_set& fds, wxFDIOHandler *handler,
+                     const char *name);
+
+    // common part of HasPending() and Dispatch(): calls select() with the
+    // specified timeout
+    int DoSelect(wxSelectSets& sets, int timeout) const;
+
+
+#if wxUSE_THREADS
+    wxCriticalSection m_cs;
+#endif // wxUSE_THREADS
+
+    // the select sets containing all the registered fds
+    wxSelectSets m_sets;
+
+    // the highest registered fd value or -1 if none
+    int m_maxFD;
+};
+
+#endif // wxUSE_SELECT_DISPATCHER
+
+#endif // _WX_PRIVATE_SOCKETEVTDISPATCH_H_