refactoring: replace wxSocketDispatcher with more generic wxSelectDispatcher (patch 1618976)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@44855 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/private/selectdispatcher.h

@@ -0,0 +1,93 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        wx/private/selectdispatcher.h
+// Purpose:     wxSelectDispatcher class
+// Authors:     Lukasz Michalski
+// Modified by:
+// Created:     December 2006
+// Copyright:   (c) Lukasz Michalski
+// RCS-ID:      $Id$
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_PRIVATE_SELECTDISPATCHER_H_
+#define _WX_PRIVATE_SELECTDISPATCHER_H_
+
+#include "wx/defs.h"
+
+#include "wx/hashmap.h"
+
+static const int wxSELECT_TIMEOUT_INFINITE = -1;
+
+// handler used to process events on descriptors
+class wxFDIOHandler
+{
+public:
+    // called when descriptor is available for non-blocking read
+    virtual void OnReadWaiting(int fd) = 0;
+
+    // called when descriptor is available  for non-blocking write
+    virtual void OnWriteWaiting(int fd) = 0;
+
+    // called when there is exception on descriptor
+    virtual void OnExceptionWaiting(int fd) = 0;
+};
+
+// those flags describes sets where descriptor should be added
+enum wxSelectDispatcherEntryFlags
+{
+    wxSelectInput = 1,
+    wxSelectOutput = 2,
+    wxSelectException = 4,
+    wxSelectAll = wxSelectInput | wxSelectOutput | wxSelectException
+};
+
+WX_DECLARE_HASH_MAP(
+  int,
+  wxFDIOHandler*,
+  wxIntegerHash,
+  wxIntegerEqual,
+  wxFDIOHandlerMap
+);
+
+class WXDLLIMPEXP_CORE wxSelectDispatcher
+{
+public:
+    // returns instance of the table
+    static wxSelectDispatcher& Get();
+
+    virtual ~wxSelectDispatcher()
+    {
+    }
+
+    // register descriptor in sets.
+    void RegisterFD(int fd, wxFDIOHandler* handler, int flags = wxSelectAll);
+
+    // unregister descriptor from sets and return handler for cleanup
+    wxFDIOHandler* UnregisterFD(int fd, int flags = wxSelectAll);
+
+    // return handler for descriptor or null if fd is not registered
+    wxFDIOHandler* FindHandler(int fd);
+
+    // calls select on registered descriptors and
+    void RunLoop(int timeout = wxSELECT_TIMEOUT_INFINITE);
+
+protected:
+    wxSelectDispatcher() { }
+
+private:
+    void ProcessSets(fd_set* readset, fd_set* writeset, fd_set* exeptset, int max_fd);
+
+    fd_set m_readset;
+    fd_set m_writeset;
+    fd_set m_exeptset;
+
+    int m_maxFD;
+    wxFDIOHandlerMap m_handlers;
+
+    static wxSelectDispatcher *ms_instance;
+
+    friend class wxSelectDispatcherModule;
+};
+
+
+#endif // _WX_PRIVATE_SOCKETEVTDISPATCH_H_