added default ctor and Create() to wxRearrangeDialog for consistency

[wxWidgets.git] / interface / wx / socket.h

diff --git a/interface/wx/socket.h b/interface/wx/socket.h
index 3a7adebb306d1fdb2e18db13d20ced933840cfcf..b5a2f058d833cdabf43b8814516b4c74af38df58 100644 (file)
--- a/interface/wx/socket.h
+++ b/interface/wx/socket.h
@@ -70,12 +70,12 @@ public:
 
         @return @true on success, @false if something goes wrong (invalid @a service).
     */
 
         @return @true on success, @false if something goes wrong (invalid @a service).
     */

-    bool Service(unsigned short service);
+    bool Service(unsigned short service) = 0;

 
     /**
         Returns the current service.
     */
 
     /**
         Returns the current service.
     */

-    unsigned short Service();
+    unsigned short Service() const = 0;

 };
 
 
 };
 
 


@@ -154,7 +154,7 @@ public:
     bool AcceptWith(wxSocketBase& socket, bool wait = true);
 
     /**
     bool AcceptWith(wxSocketBase& socket, bool wait = true);
 
     /**

-        This function waits for an incoming connection.
+        Wait for an incoming connection.

 
         Use it if you want to call Accept() or AcceptWith() with @e wait set
         to @false, to detect when an incoming connection is waiting to be accepted.
 
         Use it if you want to call Accept() or AcceptWith() with @e wait set
         to @false, to detect when an incoming connection is waiting to be accepted.


@@ -257,12 +257,12 @@ public:
 
         @return @true on success, @false if something goes wrong (invalid @a service).
     */
 
         @return @true on success, @false if something goes wrong (invalid @a service).
     */

-    virtual bool Service(unsigned short service);
+    virtual bool Service(unsigned short service) = 0;

 
     /**
         Returns the current service.
     */
 
     /**
         Returns the current service.
     */

-    virtual unsigned short Service();
+    virtual unsigned short Service() const = 0;

 };
 
 
 };
 
 


@@ -619,12 +619,9 @@ enum
     defines all basic IO functionality.
 
     @note
     defines all basic IO functionality.
 
     @note

-    (Workaround for implementation limitation for wxWidgets up to 2.5.x)
-    If you want to use sockets or derived classes such as wxFTP in a secondary
-    thread, call @b wxSocketBase::Initialize() (undocumented) from the main
-    thread before creating any sockets - in wxApp::OnInit() for example.
-    See http://wiki.wxwidgets.org/wiki.pl?WxSocket or
-    http://www.litwindow.com/knowhow/knowhow.html for more details.
+    When using wxSocket from multiple threads, even implicitly (e.g. by using
+    wxFTP or wxHTTP in another thread) you must initialize the sockets from the
+    main thread by calling Initialize() before creating the other ones.

 
     @beginEventTable{wxSocketEvent}
     @event{EVT_SOCKET(id, func)}
 
     @beginEventTable{wxSocketEvent}
     @event{EVT_SOCKET(id, func)}


@@ -678,6 +675,34 @@ public:
     */
     bool Destroy();
 
     */
     bool Destroy();
 

+    /**
+        Perform the initialization needed in order to use the sockets.
+
+        This function is called from wxSocket constructor implicitly and so
+        normally doesn't need to be called explicitly. There is however one
+        important exception: as this function must be called from the main
+        (UI) thread, if you use wxSocket from multiple threads you must call
+        Initialize() from the main thread before creating wxSocket objects in
+        the other ones.
+
+        It is safe to call this function multiple times (only the first call
+        does anything) but you must call Shutdown() exactly once for every call
+        to Initialize().
+
+        @return
+            @true if the sockets can be used, @false if the initialization
+            failed and sockets are not available at all.
+     */
+    static bool Initialize();
+
+    /**
+        Shut down the sockets.
+
+        This function undoes the call to Initialize() and must be called after
+        every successful call to Initialize().
+     */
+    static void Shutdown();
+

     //@}
 
 
     //@}
 
 


@@ -695,30 +720,33 @@ public:
     bool Error() const;
 
     /**
     bool Error() const;
 
     /**

-        This function returns the local address field of the socket. The local
-        address field contains the complete local address of the socket (local
-        address, local port, ...).
+        Return the local address of the socket.

 
         @return @true if no error happened, @false otherwise.
     */
     bool GetLocal(wxSockAddress& addr) const;
 
     /**
 
         @return @true if no error happened, @false otherwise.
     */
     bool GetLocal(wxSockAddress& addr) const;
 
     /**

-        This function returns the peer address field of the socket. The peer
-        address field contains the complete peer host address of the socket
-        (address, port, ...).
+        Return the peer address field of the socket.

 
         @return @true if no error happened, @false otherwise.
     */
     bool GetPeer(wxSockAddress& addr) const;
 
 
         @return @true if no error happened, @false otherwise.
     */
     bool GetPeer(wxSockAddress& addr) const;
 

+    /**
+        Return the socket timeout in seconds.
+
+        The timeout can be set using SetTimeout() and is 10 minutes by default.
+     */
+    long GetTimeout() const;
+

     /**
         Returns @true if the socket is connected.
     */
     bool IsConnected() const;
 
     /**
     /**
         Returns @true if the socket is connected.
     */
     bool IsConnected() const;
 
     /**

-        This function waits until the socket is readable.
+        Check if the socket can be currently read or written.

 
         This might mean that queued data is available for reading or, for streamed
         sockets, that the connection has been closed, so that a read operation will
 
         This might mean that queued data is available for reading or, for streamed
         sockets, that the connection has been closed, so that a read operation will


@@ -766,8 +794,7 @@ public:
     wxSocketError LastError() const;
 
     /**
     wxSocketError LastError() const;
 
     /**

-        This function restores the previous state of the socket, as saved
-        with SaveState().
+        Restore the previous state of the socket, as saved with SaveState().

 
         Calls to SaveState() and RestoreState() can be nested.
 
 
         Calls to SaveState() and RestoreState() can be nested.
 


@@ -776,7 +803,8 @@ public:
     void RestoreState();
 
     /**
     void RestoreState();
 
     /**

-        This function saves the current state of the socket in a stack.
+        Save the current state of the socket in a stack.
+

         Socket state includes flags, as set with SetFlags(), event mask, as set
         with SetNotify() and Notify(), user data, as set with SetClientData().
         Calls to SaveState and RestoreState can be nested.
         Socket state includes flags, as set with SetFlags(), event mask, as set
         with SetNotify() and Notify(), user data, as set with SetClientData().
         Calls to SaveState and RestoreState can be nested.


@@ -796,9 +824,9 @@ public:
     //@{
 
     /**
     //@{
 
     /**

-        This function shuts down the socket, disabling further transmission and
-        reception of data; it also disables events for the socket and frees the
-        associated system resources.
+        Shut down the socket, disabling further transmission and reception of
+        data and disable events for the socket and frees the associated system
+        resources.

 
         Upon socket destruction, Close() is automatically called, so in most cases
         you won't need to do it yourself, unless you explicitly want to shut down
 
         Upon socket destruction, Close() is automatically called, so in most cases
         you won't need to do it yourself, unless you explicitly want to shut down


@@ -813,14 +841,25 @@ public:
     void Close();
 
     /**
     void Close();
 
     /**

-        This function simply deletes all bytes in the incoming queue. This function
-        always returns immediately and its operation is not affected by IO flags.
+        Shuts down the writing end of the socket.
+
+        This function simply calls the standard shutdown() function on the
+        underlying socket, indicating that nothing will be written to this
+        socket any more.
+     */
+    void ShutdownOutput();
+
+    /**
+        Delete all bytes in the incoming queue.
+
+        This function always returns immediately and its operation is not
+        affected by IO flags.

 
         Use LastCount() to verify the number of bytes actually discarded.
 
         If you use Error(), it will always return @false.
     */
 
         Use LastCount() to verify the number of bytes actually discarded.
 
         If you use Error(), it will always return @false.
     */

-    wxSocketBase Discard();
+    wxSocketBase& Discard();

 
     /**
         Returns current IO flags, as set with SetFlags()
 
     /**
         Returns current IO flags, as set with SetFlags()


@@ -843,9 +882,11 @@ public:
     void InterruptWait();
 
     /**
     void InterruptWait();
 
     /**

-        This function peeks a buffer of @a nbytes bytes from the socket.
+        Peek into the socket by copying the next bytes which would be read by
+        Read() into the provided buffer.

 
 

-        Peeking a buffer doesn't delete it from the socket input queue.
+        Peeking a buffer doesn't delete it from the socket input queue, i.e.
+        calling Read() will return the same data.

 
         Use LastCount() to verify the number of bytes actually peeked.
 
 
         Use LastCount() to verify the number of bytes actually peeked.
 


@@ -864,10 +905,11 @@ public:
 
         @see Error(), LastError(), LastCount(), SetFlags()
     */
 
         @see Error(), LastError(), LastCount(), SetFlags()
     */

-    wxSocketBase Peek(void* buffer, wxUint32 nbytes);
+    wxSocketBase& Peek(void* buffer, wxUint32 nbytes);

 
     /**
 
     /**

-        This function reads a buffer of @a nbytes bytes from the socket.
+        Read up to the given number of bytes from the socket.
+

         Use LastCount() to verify the number of bytes actually read.
         Use Error() to determine if the operation succeeded.
 
         Use LastCount() to verify the number of bytes actually read.
         Use Error() to determine if the operation succeeded.
 


@@ -885,13 +927,14 @@ public:
         @see Error(), LastError(), LastCount(),
              SetFlags()
     */
         @see Error(), LastError(), LastCount(),
              SetFlags()
     */

-    wxSocketBase Read(void* buffer, wxUint32 nbytes);
+    wxSocketBase& Read(void* buffer, wxUint32 nbytes);

 
     /**
 
     /**

-        This function reads a buffer sent by WriteMsg()
-        on a socket. If the buffer passed to the function isn't big enough, the
-        remaining bytes will be discarded. This function always waits for the
-        buffer to be entirely filled, unless an error occurs.
+        Receive a message sent by WriteMsg().
+
+        If the buffer passed to the function isn't big enough, the remaining
+        bytes will be discarded. This function always waits for the buffer to
+        be entirely filled, unless an error occurs.

 
         Use LastCount() to verify the number of bytes actually read.
 
 
         Use LastCount() to verify the number of bytes actually read.
 


@@ -912,22 +955,34 @@ public:
 
         @see Error(), LastError(), LastCount(), SetFlags(), WriteMsg()
     */
 
         @see Error(), LastError(), LastCount(), SetFlags(), WriteMsg()
     */

-    wxSocketBase ReadMsg(void* buffer, wxUint32 nbytes);
+    wxSocketBase& ReadMsg(void* buffer, wxUint32 nbytes);

 
     /**
         Use SetFlags to customize IO operation for this socket.
 
     /**
         Use SetFlags to customize IO operation for this socket.

+

         The @a flags parameter may be a combination of flags ORed together.
         The @a flags parameter may be a combination of flags ORed together.

-        The following flags can be used:
+        Notice that not all combinations of flags affecting the IO calls
+        (Read() and Write()) make sense, e.g. @b wxSOCKET_NOWAIT can't be
+        combined with @b wxSOCKET_WAITALL nor with @b wxSOCKET_BLOCK.

 
 

+        The following flags can be used:

         @beginFlagTable
         @flag{wxSOCKET_NONE}
         @beginFlagTable
         @flag{wxSOCKET_NONE}

-            Normal functionality.
+            Default mode: the socket will read some data in the IO calls and
+            will process events to avoid blocking UI while waiting for the data
+            to become available.

         @flag{wxSOCKET_NOWAIT}
         @flag{wxSOCKET_NOWAIT}

-            Read/write as much data as possible and return immediately.
+            Don't wait for the socket to become ready in IO calls, read as much
+            data as is available -- potentially 0 bytes -- and return
+            immediately.

         @flag{wxSOCKET_WAITALL}
         @flag{wxSOCKET_WAITALL}

-            Wait for all required data to be read/written unless an error occurs.
+            Don't return before the entire amount of data specified in IO calls
+            is read or written unless an error occurs. If this flag is not
+            specified, the IO calls return as soon as any amount of data, even
+            less than the total number of bytes, is processed.

         @flag{wxSOCKET_BLOCK}
         @flag{wxSOCKET_BLOCK}

-            Block the GUI (do not yield) while reading/writing data.
+            Don't process the UI events while waiting for the socket to become
+            ready. This means that UI will be unresponsive during socket IO.

         @flag{wxSOCKET_REUSEADDR}
             Allows the use of an in-use port (wxServerSocket only).
         @flag{wxSOCKET_BROADCAST}
         @flag{wxSOCKET_REUSEADDR}
             Allows the use of an in-use port (wxServerSocket only).
         @flag{wxSOCKET_BROADCAST}


@@ -942,24 +997,29 @@ public:
     void SetFlags(wxSocketFlags flags);
 
     /**
     void SetFlags(wxSocketFlags flags);
 
     /**

-        This function allows you to set the local address and port,
-        useful when an application needs to reuse a particular port. When
-        a local port is set for a wxSocketClient,
-        @b bind() will be called before @b connect().
+        Set the local address and port to use.
+
+        This function must always be called for the server sockets but may also
+        be called for client sockets, if it is, @b bind() is called before @b
+        connect().

     */
     bool SetLocal(const wxIPV4address& local);
 
     /**
     */
     bool SetLocal(const wxIPV4address& local);
 
     /**

-        This function sets the default socket timeout in seconds. This timeout
-        applies to all IO calls, and also to the Wait() family
-        of functions if you don't specify a wait interval. Initially, the default
+        Set the default socket timeout in seconds.
+
+        This timeout applies to all IO calls, and also to the Wait() family of
+        functions if you don't specify a wait interval. Initially, the default

         timeout is 10 minutes.
     */
     void SetTimeout(int seconds);
 
     /**
         timeout is 10 minutes.
     */
     void SetTimeout(int seconds);
 
     /**

-        This function unreads a buffer. That is, the data in the buffer is put back
-        in the incoming queue. This function is not affected by wxSocket flags.
+        Put the specified data into the input queue.
+
+        The data in the buffer will be returned by the next call to Read().
+
+        This function is not affected by wxSocket flags.

 
         If you use LastCount(), it will always return @a nbytes.
 
 
         If you use LastCount(), it will always return @a nbytes.
 


@@ -974,19 +1034,20 @@ public:
 
         @see Error(), LastCount(), LastError()
     */
 
         @see Error(), LastCount(), LastError()
     */

-    wxSocketBase Unread(const void* buffer, wxUint32 nbytes);
+    wxSocketBase& Unread(const void* buffer, wxUint32 nbytes);

 
     /**
 
     /**

-        This function waits until any of the following conditions is @true:
+        Wait for any socket event.

 
 

+        Possible socket events are:

         @li The socket becomes readable.
         @li The socket becomes writable.
         @li An ongoing connection request has completed (wxSocketClient only)
         @li An incoming connection request has arrived (wxSocketServer only)
         @li The connection has been closed.
 
         @li The socket becomes readable.
         @li The socket becomes writable.
         @li An ongoing connection request has completed (wxSocketClient only)
         @li An incoming connection request has arrived (wxSocketServer only)
         @li The connection has been closed.
 

-        Note that it is recommended to use the individual Wait functions
-        to wait for the required condition, instead of this one.
+        Note that it is recommended to use the individual @b WaitForXXX()
+        functions to wait for the required condition, instead of this one.

 
         @param seconds
             Number of seconds to wait.
 
         @param seconds
             Number of seconds to wait.


@@ -995,8 +1056,9 @@ public:
         @param millisecond
             Number of milliseconds to wait.
 
         @param millisecond
             Number of milliseconds to wait.
 

-        @return Returns @true when any of the above conditions is satisfied,
-                @false if the timeout was reached.
+        @return
+           @true when any of the above conditions is satisfied or @false if the
+           timeout was reached.

 
         @see InterruptWait(), wxSocketServer::WaitForAccept(),
              WaitForLost(), WaitForRead(),
 
         @see InterruptWait(), wxSocketServer::WaitForAccept(),
              WaitForLost(), WaitForRead(),


@@ -1005,8 +1067,10 @@ public:
     bool Wait(long seconds = -1, long millisecond = 0);
 
     /**
     bool Wait(long seconds = -1, long millisecond = 0);
 
     /**

-        This function waits until the connection is lost. This may happen if
-        the peer gracefully closes the connection or if the connection breaks.
+        Wait until the connection is lost.
+
+        This may happen if the peer gracefully closes the connection or if the
+        connection breaks.

 
         @param seconds
             Number of seconds to wait.
 
         @param seconds
             Number of seconds to wait.


@@ -1023,13 +1087,16 @@ public:
     bool WaitForLost(long seconds = -1, long millisecond = 0);
 
     /**
     bool WaitForLost(long seconds = -1, long millisecond = 0);
 
     /**

-        This function waits until the socket is readable.
+        Wait until the socket is readable.

 
         This might mean that queued data is available for reading or, for streamed
         sockets, that the connection has been closed, so that a read operation will
         complete immediately without blocking (unless the @b wxSOCKET_WAITALL flag
         is set, in which case the operation might still block).
 
 
         This might mean that queued data is available for reading or, for streamed
         sockets, that the connection has been closed, so that a read operation will
         complete immediately without blocking (unless the @b wxSOCKET_WAITALL flag
         is set, in which case the operation might still block).
 

+        Notice that this function should not be called if there is already data
+        available for reading on the socket.
+

         @param seconds
             Number of seconds to wait.
             If -1, it will wait for the default timeout,
         @param seconds
             Number of seconds to wait.
             If -1, it will wait for the default timeout,


@@ -1044,13 +1111,16 @@ public:
     bool WaitForRead(long seconds = -1, long millisecond = 0);
 
     /**
     bool WaitForRead(long seconds = -1, long millisecond = 0);
 
     /**

-        This function waits until the socket becomes writable.
+        Wait until the socket becomes writable.

 
         This might mean that the socket is ready to send new data, or for streamed
         sockets, that the connection has been closed, so that a write operation is
         guaranteed to complete immediately (unless the @b wxSOCKET_WAITALL flag is set,
         in which case the operation might still block).
 
 
         This might mean that the socket is ready to send new data, or for streamed
         sockets, that the connection has been closed, so that a write operation is
         guaranteed to complete immediately (unless the @b wxSOCKET_WAITALL flag is set,
         in which case the operation might still block).
 

+        Notice that this function should not be called if the socket is already
+        writable.
+

         @param seconds
             Number of seconds to wait.
             If -1, it will wait for the default timeout,
         @param seconds
             Number of seconds to wait.
             If -1, it will wait for the default timeout,


@@ -1065,7 +1135,7 @@ public:
     bool WaitForWrite(long seconds = -1, long millisecond = 0);
 
     /**
     bool WaitForWrite(long seconds = -1, long millisecond = 0);
 
     /**

-        This function writes a buffer of @a nbytes bytes to the socket.
+        Write up to the given number of bytes to the socket.

 
         Use LastCount() to verify the number of bytes actually written.
 
 
         Use LastCount() to verify the number of bytes actually written.
 


@@ -1085,14 +1155,16 @@ public:
 
         @see Error(), LastError(), LastCount(), SetFlags()
     */
 
         @see Error(), LastError(), LastCount(), SetFlags()
     */

-    wxSocketBase Write(const void* buffer, wxUint32 nbytes);
+    wxSocketBase& Write(const void* buffer, wxUint32 nbytes);

 
     /**
 
     /**

-        This function writes a buffer of @a nbytes bytes from the socket, but it
-        writes a short header before so that ReadMsg() knows how much data should
-        it actually read. So, a buffer sent with WriteMsg() MUST be read with ReadMsg().
+        Sends a buffer which can be read using ReadMsg().

 
 

-        This function always waits for the entire buffer to be sent, unless an error occurs.
+        WriteMsg() sends a short header before the data so that ReadMsg()
+        knows how much data should be actually read.
+
+        This function always waits for the entire buffer to be sent, unless an
+        error occurs.

 
         Use LastCount() to verify the number of bytes actually written.
 
 
         Use LastCount() to verify the number of bytes actually written.
 


@@ -1115,7 +1187,7 @@ public:
         @see  Error(), LastError(), LastCount(), SetFlags(), ReadMsg()
 
     */
         @see  Error(), LastError(), LastCount(), SetFlags(), ReadMsg()
 
     */

-    wxSocketBase WriteMsg(const void* buffer, wxUint32 nbytes);
+    wxSocketBase& WriteMsg(const void* buffer, wxUint32 nbytes);

 
     //@}
 
 
     //@}
 


@@ -1221,7 +1293,8 @@ public:
     virtual ~wxDatagramSocket();
 
     /**
     virtual ~wxDatagramSocket();
 
     /**

-        This function writes a buffer of @a nbytes bytes to the socket.
+        Write a buffer of @a nbytes bytes to the socket.
+

         Use wxSocketBase::LastCount() to verify the number of bytes actually wrote.
         Use wxSocketBase::Error() to determine if the operation succeeded.
 
         Use wxSocketBase::LastCount() to verify the number of bytes actually wrote.
         Use wxSocketBase::Error() to determine if the operation succeeded.