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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1351 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2008-11-29 18:14:06 +00:00
parent c5d890f686
commit 10a350ebce
1 changed files with 17 additions and 10 deletions
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27
graphics/nxmu/nx_eventhandler.c
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@ -108,19 +108,25 @@ static inline void nx_disconnected(FAR struct nxfe_conn_s *conn)
*
* Description:
* The client code must call this function periodically to process
* incoming messages from the server.
* incoming messages from the server. If CONFIG_NX_BLOCKING is defined,
* then this function not return until a server message is received.
*
* When CONFIG_NX_BLOCKING is not defined, the client must exercise
* caution in the looping to assure that it does not eat up all of
* the CPU bandwidth calling nx_eventhandler repeatedly. nx_eventnotify
* may be called to get a signal event whenever a new incoming server
* event is avaiable.
*
* Input Parameters:
* handle - the handle returned by nx_connect
*
* Return:
* >0: The length of the message received in msgbuffer
* 0: No message was received
* <0: An error occurred and errno has been set appropriately
*
* Of particular interest, it will return errno == EHOSTDOWN when the
* server is disconnected. After that event, the handle can not longer
* be used.
* OK: No errors occurred. If CONFIG_NX_BLOCKING is defined, then
* one or more server message was processed.
* ERROR: An error occurred and errno has been set appropriately. Of
* particular interest, it will return errno == EHOSTDOWN when the
* server is disconnected. After that event, the handle can no
* longer be used.
*
****************************************************************************/
@ -168,13 +174,14 @@ int nx_eventhandler(NXHANDLE handle)
/* Dispatch the message appropriately */
msg = (struct nxsvrmsg_s *)buffer;
gvdbg("Received msgid=%d\n", msg->msgid);
switch (msg->msgid)
{
case NX_SVRMSG_CONNECT:
case NX_CLIMSG_CONNECTED:
nx_connected(conn);
break;
case NX_SVRMSG_DISCONNECT:
case NX_CLIMSG_DISCONNECTED:
nx_disconnected(conn);
errno = EHOSTDOWN;
return ERROR;