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authorMattes D <github@xoft.cz>2015-01-24 23:21:18 +0100
committerMattes D <github@xoft.cz>2015-01-27 14:53:32 +0100
commitf243aa387c0c76c46abef90292cab0aab0c63962 (patch)
tree118ffdaa5e6070d45e6a523d289539fa139aefe7 /src/OSSupport/SocketThreads.h
parentBlockingSslClientSocket: Migrated to cNetwork API. (diff)
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Diffstat (limited to 'src/OSSupport/SocketThreads.h')
-rw-r--r--src/OSSupport/SocketThreads.h194
1 files changed, 0 insertions, 194 deletions
diff --git a/src/OSSupport/SocketThreads.h b/src/OSSupport/SocketThreads.h
deleted file mode 100644
index df819468d..000000000
--- a/src/OSSupport/SocketThreads.h
+++ /dev/null
@@ -1,194 +0,0 @@
-
-// SocketThreads.h
-
-// Interfaces to the cSocketThreads class representing the heart of MCS's client networking.
-// This object takes care of network communication, groups sockets into threads and uses as little threads as possible for full read / write support
-// For more detail, see http://forum.mc-server.org/showthread.php?tid=327
-
-/*
-Additional details:
-When a client wants to terminate the connection, they call the RemoveClient() function. This calls the
-callback one last time to read all the available outgoing data, putting it in the slot's m_OutgoingData
-buffer. Then it marks the slot as having no callback. The socket is kept alive until its outgoing data
-queue is empty, then shutdown is called on it and finally the socket is closed after a timeout.
-If at any time within this the remote end closes the socket, then the socket is closed directly.
-As soon as the socket is closed, the slot is finally removed from the SocketThread.
-The graph in $/docs/SocketThreads States.gv shows the state-machine transitions of the slot.
-*/
-
-
-
-
-
-/** How many clients should one thread handle? (must be less than FD_SETSIZE for your platform) */
-#define MAX_SLOTS 63
-
-
-
-
-
-#pragma once
-
-#include "Socket.h"
-#include "IsThread.h"
-
-
-
-
-// Check MAX_SLOTS:
-#if MAX_SLOTS >= FD_SETSIZE
- #error "MAX_SLOTS must be less than FD_SETSIZE for your platform! (otherwise select() won't work)"
-#endif
-
-
-
-
-
-// fwd:
-class cSocket;
-class cClientHandle;
-
-
-
-
-
-class cSocketThreads
-{
-public:
-
- // Clients of cSocketThreads must implement this interface to be able to communicate
- class cCallback
- {
- public:
- // Force a virtual destructor in all subclasses:
- virtual ~cCallback() {}
-
- /** Called when data is received from the remote party.
- SocketThreads does not care about the return value, others can use it for their specific purpose -
- for example HTTPServer uses it to signal if the connection was terminated as a result of the data received. */
- virtual bool DataReceived(const char * a_Data, size_t a_Size) = 0;
-
- /** Called when data can be sent to remote party
- The function is supposed to *set* outgoing data to a_Data (overwrite) */
- virtual void GetOutgoingData(AString & a_Data) = 0;
-
- /** Called when the socket has been closed for any reason */
- virtual void SocketClosed(void) = 0;
- } ;
-
-
- cSocketThreads(void);
- ~cSocketThreads();
-
- /** Add a (socket, client) pair for processing, data from a_Socket is to be sent to a_Client; returns true if successful */
- bool AddClient(const cSocket & a_Socket, cCallback * a_Client);
-
- /** Remove the associated socket and the client from processing.
- The socket is left to send its last outgoing data and is removed only after all its m_Outgoing is sent
- and after the socket is properly shutdown (unless the remote disconnects before that)
- */
- void RemoveClient(const cCallback * a_Client);
-
- /** Notify the thread responsible for a_Client that the client has something to write */
- void NotifyWrite(const cCallback * a_Client);
-
- /** Puts a_Data into outgoing data queue for a_Client */
- void Write(const cCallback * a_Client, const AString & a_Data);
-
-private:
-
- class cSocketThread :
- public cIsThread
- {
- typedef cIsThread super;
-
- public:
-
- cSocketThread(cSocketThreads * a_Parent);
- virtual ~cSocketThread();
-
- // All these methods assume parent's m_CS is locked
- bool HasEmptySlot(void) const {return m_NumSlots < MAX_SLOTS; }
- bool IsEmpty (void) const {return m_NumSlots == 0; }
-
- void AddClient (const cSocket & a_Socket, cCallback * a_Client); // Takes ownership of the socket
- bool RemoveClient(const cCallback * a_Client); // Returns true if removed, false if not found
- bool HasClient (const cCallback * a_Client) const;
- bool HasSocket (const cSocket * a_Socket) const;
- bool NotifyWrite (const cCallback * a_Client); // Returns true if client handled by this thread
- bool Write (const cCallback * a_Client, const AString & a_Data); // Returns true if client handled by this thread
-
- bool Start(void); // Hide the cIsThread's Start method, we need to provide our own startup to create the control socket
-
- bool IsValid(void) const {return m_ControlSocket2.IsValid(); } // If the Control socket dies, the thread is not valid anymore
-
- private:
-
- cSocketThreads * m_Parent;
-
- // Two ends of the control socket, the first is select()-ed, the second is written to for notifications
- cSocket m_ControlSocket1;
- cSocket m_ControlSocket2;
-
- // Socket-client-dataqueues-state quadruplets.
- // Manipulation with these assumes that the parent's m_CS is locked
- struct sSlot
- {
- /** The socket is primarily owned by this object */
- cSocket m_Socket;
-
- /** The callback to call for events. May be nullptr */
- cCallback * m_Client;
-
- /** If sending writes only partial data, the rest is stored here for another send.
- Also used when the slot is being removed to store the last batch of outgoing data. */
- AString m_Outgoing;
-
- enum eState
- {
- ssNormal, ///< Normal read / write operations
- ssWritingRestOut, ///< The client callback was removed, continue to send outgoing data
- ssShuttingDown, ///< The last outgoing data has been sent, the socket has called shutdown()
- ssShuttingDown2, ///< The shutdown has been done at least 1 thread loop ago (timeout detection)
- ssRemoteClosed, ///< The remote end has closed the connection (and we still have a client callback)
- } m_State;
- } ;
-
- sSlot m_Slots[MAX_SLOTS];
- int m_NumSlots; // Number of slots actually used
-
- virtual void Execute(void) override;
-
- /** Prepares the Read and Write socket sets for select()
- Puts all sockets into the read set, along with m_ControlSocket1.
- Only sockets that have outgoing data queued on them are put in the write set.*/
- void PrepareSets(fd_set * a_ReadSet, fd_set * a_WriteSet, cSocket::xSocket & a_Highest);
-
- /** Reads from sockets indicated in a_Read */
- void ReadFromSockets(fd_set * a_Read);
-
- /** Writes to sockets indicated in a_Write */
- void WriteToSockets (fd_set * a_Write);
-
- /** Sends data through the specified socket, trying to fill the OS send buffer in chunks.
- Returns true if there was no error while sending, false if an error has occured.
- Modifies a_Data to contain only the unsent data. */
- bool SendDataThroughSocket(cSocket & a_Socket, AString & a_Data);
-
- /** Removes those slots in ssShuttingDown2 state, sets those with ssShuttingDown state to ssShuttingDown2 */
- void CleanUpShutSockets(void);
-
- /** Calls each client's callback to retrieve outgoing data for that client. */
- void QueueOutgoingData(void);
- } ;
-
- typedef std::list<cSocketThread *> cSocketThreadList;
-
-
- cCriticalSection m_CS;
- cSocketThreadList m_Threads;
-} ;
-
-
-
-