Trying to hide evidence of my negative programming skills...

[wxWidgets.git] / include / wx / gsocket.h

diff --git a/include/wx/gsocket.h b/include/wx/gsocket.h
index 938b6f0b77794b3fd127b0a1e8e645d07a22d11e..5f6924aed3f7d0a70cea3e123f637e8fb2e7f94c 100644 (file)
--- a/include/wx/gsocket.h
+++ b/include/wx/gsocket.h
@@ -1,30 +1,29 @@
 /* -------------------------------------------------------------------------
  * Project: GSocket (Generic Socket)
  * Name:    gsocket.h
 /* -------------------------------------------------------------------------
  * Project: GSocket (Generic Socket)
  * Name:    gsocket.h

+ * Author:  Guilhem Lavaux
+ *          Guillermo Rodriguez Garcia <guille@iies.es> (maintainer)

  * Purpose: GSocket include file (system independent)
  * CVSID:   $Id$
  * -------------------------------------------------------------------------
  */
  * Purpose: GSocket include file (system independent)
  * CVSID:   $Id$
  * -------------------------------------------------------------------------
  */

+

 #ifndef __GSOCKET_H
 #define __GSOCKET_H
 
 #ifndef __GSOCKET_H
 #define __GSOCKET_H
 

+#ifndef __GSOCKET_STANDALONE__

 #include "wx/setup.h"
 #include "wx/setup.h"

+#endif

 
 

-#if wxUSE_SOCKETS
+#if wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__)

 
 #include <stddef.h>
 
 #include <stddef.h>

+#ifndef __WXMAC__

 #include <sys/types.h>
 #include <sys/types.h>

-
-#if !defined(__cplusplus)
-typedef int bool;

 #endif
 
 #endif
 

-#ifndef TRUE
-#define TRUE 1
-#endif
-
-#ifndef FALSE
-#define FALSE 0
+#ifdef __cplusplus
+extern "C" {

 #endif
 
 typedef struct _GSocket GSocket;
 #endif
 
 typedef struct _GSocket GSocket;


@@ -51,10 +50,12 @@ typedef enum {
   GSOCK_NOHOST,
   GSOCK_INVPORT,
   GSOCK_WOULDBLOCK,
   GSOCK_NOHOST,
   GSOCK_INVPORT,
   GSOCK_WOULDBLOCK,

-  GSOCK_TIMEOUT,
+  GSOCK_TIMEDOUT,

   GSOCK_MEMERR
 } GSocketError;
 
   GSOCK_MEMERR
 } GSocketError;
 

+/* See below for an explanation on how events work.
+ */

 typedef enum {
   GSOCK_INPUT  = 0,
   GSOCK_OUTPUT = 1,
 typedef enum {
   GSOCK_INPUT  = 0,
   GSOCK_OUTPUT = 1,


@@ -75,137 +76,222 @@ typedef int GSocketEventFlags;
 typedef void (*GSocketCallback)(GSocket *socket, GSocketEvent event,
                                 char *cdata);
 
 typedef void (*GSocketCallback)(GSocket *socket, GSocketEvent event,
                                 char *cdata);
 

-#ifdef __cplusplus
-extern "C" {
-#endif

 
 

-/* Global initialisers */
+/* Global initializers */

 
 /* GSocket_Init() must be called at the beginning */
 
 /* GSocket_Init() must be called at the beginning */

-bool GSocket_Init();
-/* GSocket_Cleanup() must be called at the ending */
-void GSocket_Cleanup();
+int GSocket_Init(void);
+
+/* GSocket_Cleanup() must be called at the end */
+void GSocket_Cleanup(void);
+

 
 /* Constructors / Destructors */
 
 
 /* Constructors / Destructors */
 

-GSocket *GSocket_new();
+GSocket *GSocket_new(void);

 void GSocket_destroy(GSocket *socket);
 
 void GSocket_destroy(GSocket *socket);
 

-/* This will disable all IO calls to this socket but errors are still available */
+
+
+/* GSocket_Shutdown:
+ *  Disallow further read/write operations on this socket, close
+ *  the fd and disable all callbacks.
+ */

 void GSocket_Shutdown(GSocket *socket);
 
 /* Address handling */
 
 void GSocket_Shutdown(GSocket *socket);
 
 /* Address handling */
 

+/* GSocket_SetLocal:
+ * GSocket_GetLocal:
+ * GSocket_SetPeer:
+ * GSocket_GetPeer:
+ *  Set or get the local or peer address for this socket. The 'set'
+ *  functions return GSOCK_NOERROR on success, an error code otherwise.
+ *  The 'get' functions return a pointer to a GAddress object on success,
+ *  or NULL otherwise, in which case they set the error code of the
+ *  corresponding GSocket.
+ *
+ *  Error codes:
+ *    GSOCK_INVSOCK - the socket is not valid.
+ *    GSOCK_INVADDR - the address is not valid.
+ */

 GSocketError GSocket_SetLocal(GSocket *socket, GAddress *address);
 GSocketError GSocket_SetPeer(GSocket *socket, GAddress *address);
 GAddress *GSocket_GetLocal(GSocket *socket);
 GAddress *GSocket_GetPeer(GSocket *socket);
 
 GSocketError GSocket_SetLocal(GSocket *socket, GAddress *address);
 GSocketError GSocket_SetPeer(GSocket *socket, GAddress *address);
 GAddress *GSocket_GetLocal(GSocket *socket);
 GAddress *GSocket_GetPeer(GSocket *socket);
 

-/* Non-oriented connections handlers */
-
-GSocketError GSocket_SetNonOriented(GSocket *socket);
-

 /* Server specific parts */
 
 /* Server specific parts */
 

-/*
-  GSocket_SetServer() setups the socket as a server. It uses the "Local" field
-  of GSocket. "Local" must be set by GSocket_SetLocal() before
-  GSocket_SetServer() is called. In the other case, it returns GSOCK_INVADDR.
-*/
+/* GSocket_SetServer:
+ *  Sets up this socket as a server. The local address must have been
+ *  set with GSocket_SetLocal() before GSocket_SetServer() is called.
+ *  Returns GSOCK_NOERROR on success, one of the following otherwise:
+ *
+ *  Error codes:
+ *    GSOCK_INVSOCK - the socket is in use.
+ *    GSOCK_INVADDR - the local address has not been set.
+ *    GSOCK_IOERR   - low-level error.
+ */

 GSocketError GSocket_SetServer(GSocket *socket);
 
 GSocketError GSocket_SetServer(GSocket *socket);
 

-/*
-  GSocket_WaitConnection() waits for an incoming client connection.
-*/
+/* GSocket_WaitConnection:
+ *  Waits for an incoming client connection. Returns a pointer to
+ *  a GSocket object, or NULL if there was an error, in which case
+ *  the last error field will be updated for the calling GSocket.
+ *
+ *  Error codes (set in the calling GSocket)
+ *    GSOCK_INVSOCK    - the socket is not valid or not a server.
+ *    GSOCK_TIMEDOUT   - timeout, no incoming connections.
+ *    GSOCK_WOULDBLOCK - the call would block and the socket is nonblocking.
+ *    GSOCK_MEMERR     - couldn't allocate memory.
+ *    GSOCK_IOERR      - low-level error.
+ */

 GSocket *GSocket_WaitConnection(GSocket *socket);
 
 GSocket *GSocket_WaitConnection(GSocket *socket);
 

+

 /* Client specific parts */
 
 /* Client specific parts */
 

-/*
-  GSocket_Connect() establishes a client connection to a server using the "Peer"
-  field of GSocket. "Peer" must be set by GSocket_SetPeer() before
-  GSocket_Connect() is called. In the other case, it returns GSOCK_INVADDR.
-*/
+/* GSocket_Connect:
+ *  For stream (connection oriented) sockets, GSocket_Connect() tries
+ *  to establish a client connection to a server using the peer address
+ *  as established with GSocket_SetPeer(). Returns GSOCK_NOERROR if the
+ *  connection has been succesfully established, or one of the error
+ *  codes listed below. Note that for nonblocking sockets, a return
+ *  value of GSOCK_WOULDBLOCK doesn't mean a failure. The connection
+ *  request can be completed later; you should use GSocket_Select()
+ *  to poll for GSOCK_CONNECTION | GSOCK_LOST, or wait for the
+ *  corresponding asynchronous events.
+ *
+ *  For datagram (non connection oriented) sockets, GSocket_Connect()
+ *  just sets the peer address established with GSocket_SetPeer() as
+ *  default destination.
+ *
+ *  Error codes:
+ *    GSOCK_INVSOCK    - the socket is in use or not valid.
+ *    GSOCK_INVADDR    - the peer address has not been established.
+ *    GSOCK_TIMEDOUT   - timeout, the connection failed.
+ *    GSOCK_WOULDBLOCK - connection in progress (nonblocking sockets only)
+ *    GSOCK_MEMERR     - couldn't allocate memory.
+ *    GSOCK_IOERR      - low-level error.
+ */

 GSocketError GSocket_Connect(GSocket *socket, GSocketStream stream);
 
 GSocketError GSocket_Connect(GSocket *socket, GSocketStream stream);
 

+
+/* Datagram sockets */
+
+/* GSocket_SetNonOriented:
+ *  Sets up this socket as a non-connection oriented (datagram) socket.
+ *  Before using this function, the local address must have been set
+ *  with GSocket_SetLocal(), or the call will fail. Returns GSOCK_NOERROR
+ *  on success, or one of the following otherwise.
+ *
+ *  Error codes:
+ *    GSOCK_INVSOCK - the socket is in use.
+ *    GSOCK_INVADDR - the local address has not been set.
+ *    GSOCK_IOERR   - low-level error.
+ */
+GSocketError GSocket_SetNonOriented(GSocket *socket);
+
+

 /* Generic IO */
 
 /* Like recv(), send(), ... */
 /* Generic IO */
 
 /* Like recv(), send(), ... */

-/*
-   NOTE: In case we read from a non-oriented connection, the incoming (outgoing)
-   connection address is stored in the "Local" ("Peer") field.
-*/
+
+/* For datagram sockets, the incoming / outgoing addresses
+ * are stored as / read from the 'peer' address field.
+ */

 int GSocket_Read(GSocket *socket, char *buffer, int size);
 int GSocket_Write(GSocket *socket, const char *buffer,
                   int size);
 int GSocket_Read(GSocket *socket, char *buffer, int size);
 int GSocket_Write(GSocket *socket, const char *buffer,
                   int size);

-bool GSocket_DataAvailable(GSocket *socket);
-
-/* Flags/Parameters */

 
 

-/*
-  GSocket_SetTimeout() sets the timeout for reading and writing IO call. Time
-  is expressed in milliseconds.
+/* GSocket_Select:
+ *  Polls the socket to determine its status. This function will
+ *  check for the events specified in the 'flags' parameter, and
+ *  it will return a mask indicating which operations can be
+ *  performed. This function won't block, regardless of the
+ *  mode (blocking | nonblocking) of the socket.

  */
  */

-void GSocket_SetTimeout(GSocket *socket, unsigned long millisec);
+GSocketEventFlags GSocket_Select(GSocket *socket, GSocketEventFlags flags);

 
 

-/*
-  GSocket_SetBlocking() puts the socket in non-blocking mode. This is useful
-  if we don't want to wait.
-*/
-void GSocket_SetNonBlocking(GSocket *socket, bool non_block);

 
 

-/*
-  GSocket_GetError() returns the last error occured on the socket stream.
-*/
+/* Attributes */

 
 

+/* GSocket_SetNonBlocking:
+ *  Sets the socket to non-blocking mode. All IO calls will return
+ *  immediately.
+ */
+void GSocket_SetNonBlocking(GSocket *socket, int non_block);
+
+/* GSocket_SetTimeout:
+ *  Sets the timeout for blocking calls. Time is expressed in
+ *  milliseconds.
+ */
+void GSocket_SetTimeout(GSocket *socket, unsigned long millisec);
+
+/* GSocket_GetError:
+ *  Returns the last error occured for this socket. Note that successful
+ *  operations do not clear this back to GSOCK_NOERROR, so use it only
+ *  after an error.
+ */

 GSocketError GSocket_GetError(GSocket *socket);
 
 GSocketError GSocket_GetError(GSocket *socket);
 

+

 /* Callbacks */
 
 /* Callbacks */
 

-/*
-   Only one fallback is possible for each event (INPUT, OUTPUT, CONNECTION, LOST)
-   INPUT: The function is called when there is at least a byte in the
-          input buffer
-   OUTPUT: The function is called when the system is sure the next write call
-           will not block
-   CONNECTION: Two cases is possible:
-             Client socket -> the connection is established
-             Server socket -> a client request a connection
-   LOST: the connection is lost
-
-   SetCallback accepts a combination of these flags so a same callback can
-   receive different events.
-
-   An event is generated only once and its state is reseted when the relative
-   IO call is requested.
-   For example: INPUT -> GSocket_Read()
-                CONNECTION -> GSocket_Accept()
-*/
-void GSocket_SetCallback(GSocket *socket, GSocketEventFlags event,
+/* GSOCK_INPUT:
+ *   There is data to be read in the input buffer. If, after a read
+ *   operation, there is still data available, the callback function will
+ *   be called again.
+ * GSOCK_OUTPUT:
+ *   The socket is available for writing. That is, the next write call
+ *   won't block. This event is generated only once, when the connection is
+ *   first established, and then only if a call failed with GSOCK_WOULDBLOCK,
+ *   when the output buffer empties again. This means that the app should
+ *   assume that it can write since the first OUTPUT event, and no more
+ *   OUTPUT events will be generated unless an error occurs.
+ * GSOCK_CONNECTION:
+ *   Connection succesfully established, for client sockets, or incoming
+ *   client connection, for server sockets. Wait for this event (also watch
+ *   out for GSOCK_LOST) after you issue a nonblocking GSocket_Connect() call.
+ * GSOCK_LOST:
+ *   The connection is lost (or a connection request failed); this could
+ *   be due to a failure, or due to the peer closing it gracefully.
+ */
+
+/* GSocket_SetCallback:
+ *  Enables the callbacks specified by 'flags'. Note that 'flags'
+ *  may be a combination of flags OR'ed toghether, so the same
+ *  callback function can be made to accept different events.
+ *  The callback function must have the following prototype:
+ *
+ *  void function(GSocket *socket, GSocketEvent event, char *cdata)
+ */
+void GSocket_SetCallback(GSocket *socket, GSocketEventFlags flags,

                          GSocketCallback fallback, char *cdata);
 
                          GSocketCallback fallback, char *cdata);
 

-/*
-  UnsetCallback will disables all fallbacks specified by "event".
-  NOTE: event may be a combination of flags
-*/
-void GSocket_UnsetCallback(GSocket *socket, GSocketEventFlags event);
+/* GSocket_UnsetCallback:
+ *  Disables all callbacks specified by 'flags', which may be a
+ *  combination of flags OR'ed toghether.
+ */
+void GSocket_UnsetCallback(GSocket *socket, GSocketEventFlags flags);
+

 
 /* GAddress */
 
 
 /* GAddress */
 

-GAddress *GAddress_new();
+GAddress *GAddress_new(void);

 GAddress *GAddress_copy(GAddress *address);
 void GAddress_destroy(GAddress *address);
 
 void GAddress_SetFamily(GAddress *address, GAddressType type);
 GAddressType GAddress_GetFamily(GAddress *address);
 
 GAddress *GAddress_copy(GAddress *address);
 void GAddress_destroy(GAddress *address);
 
 void GAddress_SetFamily(GAddress *address, GAddressType type);
 GAddressType GAddress_GetFamily(GAddress *address);
 

-/*
-   The use of any of the next functions will set the address family to the adapted
-   one. For example if you use GAddress_INET_SetHostName, address family will be AF_INET
-   implicitely
-*/
+/* The use of any of the next functions will set the address family to
+ * the specific one. For example if you use GAddress_INET_SetHostName,
+ * address family will be implicitly set to AF_INET.
+ */

 
 GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname);
 
 GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname);

+GSocketError GAddress_INET_SetAnyAddress(GAddress *address);

 GSocketError GAddress_INET_SetHostAddress(GAddress *address,
                                           unsigned long hostaddr);
 GSocketError GAddress_INET_SetPortName(GAddress *address, const char *port,
 GSocketError GAddress_INET_SetHostAddress(GAddress *address,
                                           unsigned long hostaddr);
 GSocketError GAddress_INET_SetPortName(GAddress *address, const char *port,


@@ -222,23 +308,11 @@ unsigned short GAddress_INET_GetPort(GAddress *address);
 GSocketError GAddress_UNIX_SetPath(GAddress *address, const char *path);
 GSocketError GAddress_UNIX_GetPath(GAddress *address, char *path, size_t sbuf);
 
 GSocketError GAddress_UNIX_SetPath(GAddress *address, const char *path);
 GSocketError GAddress_UNIX_GetPath(GAddress *address, char *path, size_t sbuf);
 

-/*
- * System specific functions
- */
-
-/* On systems needing an event id */
-void GSocket_SetEventID(GSocket *socket, unsigned long evt_id);
-
-/* On systems which don't have background refresh */
-void GSocket_DoEvent(unsigned long evt_id);
-

 #ifdef __cplusplus
 };
 #endif /* __cplusplus */
 
 
 #ifdef __cplusplus
 };
 #endif /* __cplusplus */
 
 

-#endif
-    /* wxUSE_SOCKETS */
+#endif    /* wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) */

 
 

-#endif
-    /* __GSOCKET_H */
+#endif    /* __GSOCKET_H */