Rewritten SocketThreads for proper shutdown scenario.
This fixes #560 and #390.
This commit is contained in:
madmaxoft
parent
cce063b0cd
commit
3c0e8c8da0
@ -120,9 +120,6 @@ cClientHandle::~cClientHandle()
|
||||
|
||||
LOGD("Deleting client \"%s\" at %p", GetUsername().c_str(), this);
|
||||
|
||||
// Remove from cSocketThreads, we're not to be called anymore:
|
||||
cRoot::Get()->GetServer()->ClientDestroying(this);
|
||||
|
||||
{
|
||||
cCSLock Lock(m_CSChunkLists);
|
||||
m_LoadedChunks.clear();
|
||||
@ -160,8 +157,7 @@ cClientHandle::~cClientHandle()
|
||||
cRoot::Get()->GetServer()->WriteToClient(this, Data);
|
||||
}
|
||||
|
||||
// Queue the socket to close as soon as it sends all outgoing data:
|
||||
cRoot::Get()->GetServer()->QueueClientClose(this);
|
||||
// Close the socket as soon as it sends all outgoing data:
|
||||
cRoot::Get()->GetServer()->RemoveClient(this);
|
||||
|
||||
delete m_Protocol;
|
||||
|
||||
@ -26,7 +26,7 @@ cHTTPConnection::cHTTPConnection(cHTTPServer & a_HTTPServer) :
|
||||
|
||||
cHTTPConnection::~cHTTPConnection()
|
||||
{
|
||||
// LOGD("HTTP: Del connection at %p", this);
|
||||
delete m_CurrentRequest;
|
||||
}
|
||||
|
||||
|
||||
|
||||
@ -87,6 +87,25 @@ void cSocket::CloseSocket()
|
||||
|
||||
|
||||
|
||||
void cSocket::ShutdownReadWrite(void)
|
||||
{
|
||||
#ifdef _WIN32
|
||||
int res = shutdown(m_Socket, SD_BOTH);
|
||||
#else
|
||||
int res = shutdown(m_Socket, SHUT_RDWR);
|
||||
#endif
|
||||
if (res != 0)
|
||||
{
|
||||
LOGWARN("%s: Error shutting down socket %d (%s): %d (%s)",
|
||||
__FUNCTION__, m_Socket, m_IPString.c_str(), this->GetLastError(), GetLastErrorString().c_str()
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
AString cSocket::GetErrorString( int a_ErrNo )
|
||||
{
|
||||
char buffer[ 1024 ];
|
||||
|
||||
@ -40,6 +40,10 @@ public:
|
||||
bool IsValid(void) const { return IsValidSocket(m_Socket); }
|
||||
void CloseSocket(void);
|
||||
|
||||
/** Notifies the socket that we don't expect any more reads nor writes on it.
|
||||
Most TCPIP implementations use this to send the FIN flag in a packet */
|
||||
void ShutdownReadWrite(void);
|
||||
|
||||
operator xSocket(void) const;
|
||||
xSocket GetSocket(void) const;
|
||||
|
||||
|
||||
@ -132,47 +132,6 @@ void cSocketThreads::Write(const cCallback * a_Client, const AString & a_Data)
|
||||
|
||||
|
||||
|
||||
/// Stops reading from the socket - when this call returns, no more calls to the callbacks are made
|
||||
void cSocketThreads::StopReading(const cCallback * a_Client)
|
||||
{
|
||||
cCSLock Lock(m_CS);
|
||||
for (cSocketThreadList::iterator itr = m_Threads.begin(); itr != m_Threads.end(); ++itr)
|
||||
{
|
||||
if ((*itr)->StopReading(a_Client))
|
||||
{
|
||||
return;
|
||||
}
|
||||
} // for itr - m_Threads[]
|
||||
|
||||
// Cannot assert, this normally happens if the socket is closed before the client deinitializes
|
||||
// ASSERT(!"Stopping reading on an unknown client");
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
/// Queues the socket for closing, as soon as its outgoing data is sent
|
||||
void cSocketThreads::QueueClose(const cCallback * a_Client)
|
||||
{
|
||||
LOGD("QueueClose(client %p)", a_Client);
|
||||
|
||||
cCSLock Lock(m_CS);
|
||||
for (cSocketThreadList::iterator itr = m_Threads.begin(); itr != m_Threads.end(); ++itr)
|
||||
{
|
||||
if ((*itr)->QueueClose(a_Client))
|
||||
{
|
||||
return;
|
||||
}
|
||||
} // for itr - m_Threads[]
|
||||
|
||||
ASSERT(!"Queueing close of an unknown client");
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
// cSocketThreads::cSocketThread:
|
||||
|
||||
@ -210,13 +169,13 @@ cSocketThreads::cSocketThread::~cSocketThread()
|
||||
|
||||
void cSocketThreads::cSocketThread::AddClient(const cSocket & a_Socket, cCallback * a_Client)
|
||||
{
|
||||
ASSERT(m_Parent->m_CS.IsLockedByCurrentThread());
|
||||
ASSERT(m_NumSlots < MAX_SLOTS); // Use HasEmptySlot() to check before adding
|
||||
|
||||
m_Slots[m_NumSlots].m_Client = a_Client;
|
||||
m_Slots[m_NumSlots].m_Socket = a_Socket;
|
||||
m_Slots[m_NumSlots].m_Outgoing.clear();
|
||||
m_Slots[m_NumSlots].m_ShouldClose = false;
|
||||
m_Slots[m_NumSlots].m_ShouldCallClient = true;
|
||||
m_Slots[m_NumSlots].m_State = sSlot::ssNormal;
|
||||
m_NumSlots++;
|
||||
|
||||
// Notify the thread of the change:
|
||||
@ -230,7 +189,7 @@ void cSocketThreads::cSocketThread::AddClient(const cSocket & a_Socket, cCallbac
|
||||
|
||||
bool cSocketThreads::cSocketThread::RemoveClient(const cCallback * a_Client)
|
||||
{
|
||||
// Returns true if removed, false if not found
|
||||
ASSERT(m_Parent->m_CS.IsLockedByCurrentThread());
|
||||
|
||||
if (m_NumSlots == 0)
|
||||
{
|
||||
@ -244,8 +203,29 @@ bool cSocketThreads::cSocketThread::RemoveClient(const cCallback * a_Client)
|
||||
continue;
|
||||
}
|
||||
|
||||
// Found, remove it:
|
||||
m_Slots[i] = m_Slots[--m_NumSlots];
|
||||
// Found the slot:
|
||||
if (m_Slots[i].m_State == sSlot::ssRemoteClosed)
|
||||
{
|
||||
// The remote has already closed the socket, remove the slot altogether:
|
||||
m_Slots[i] = m_Slots[--m_NumSlots];
|
||||
}
|
||||
else
|
||||
{
|
||||
// Query and queue the last batch of outgoing data:
|
||||
m_Slots[i].m_Client->GetOutgoingData(m_Slots[i].m_Outgoing);
|
||||
if (m_Slots[i].m_Outgoing.empty())
|
||||
{
|
||||
// No more outgoing data, shut the socket down immediately:
|
||||
m_Slots[i].m_Socket.ShutdownReadWrite();
|
||||
m_Slots[i].m_State = sSlot::ssShuttingDown;
|
||||
}
|
||||
else
|
||||
{
|
||||
// More data to send, shut down reading and wait for the rest to get sent:
|
||||
m_Slots[i].m_State = sSlot::ssWritingRestOut;
|
||||
}
|
||||
m_Slots[i].m_Client = NULL;
|
||||
}
|
||||
|
||||
// Notify the thread of the change:
|
||||
ASSERT(m_ControlSocket2.IsValid());
|
||||
@ -263,6 +243,8 @@ bool cSocketThreads::cSocketThread::RemoveClient(const cCallback * a_Client)
|
||||
|
||||
bool cSocketThreads::cSocketThread::HasClient(const cCallback * a_Client) const
|
||||
{
|
||||
ASSERT(m_Parent->m_CS.IsLockedByCurrentThread());
|
||||
|
||||
for (int i = m_NumSlots - 1; i >= 0; --i)
|
||||
{
|
||||
if (m_Slots[i].m_Client == a_Client)
|
||||
@ -295,6 +277,8 @@ bool cSocketThreads::cSocketThread::HasSocket(const cSocket * a_Socket) const
|
||||
|
||||
bool cSocketThreads::cSocketThread::NotifyWrite(const cCallback * a_Client)
|
||||
{
|
||||
ASSERT(m_Parent->m_CS.IsLockedByCurrentThread());
|
||||
|
||||
if (HasClient(a_Client))
|
||||
{
|
||||
// Notify the thread that there's another packet in the queue:
|
||||
@ -311,7 +295,7 @@ bool cSocketThreads::cSocketThread::NotifyWrite(const cCallback * a_Client)
|
||||
|
||||
bool cSocketThreads::cSocketThread::Write(const cCallback * a_Client, const AString & a_Data)
|
||||
{
|
||||
// Returns true if socket handled by this thread
|
||||
ASSERT(m_Parent->m_CS.IsLockedByCurrentThread());
|
||||
for (int i = m_NumSlots - 1; i >= 0; --i)
|
||||
{
|
||||
if (m_Slots[i].m_Client == a_Client)
|
||||
@ -332,47 +316,6 @@ bool cSocketThreads::cSocketThread::Write(const cCallback * a_Client, const AStr
|
||||
|
||||
|
||||
|
||||
bool cSocketThreads::cSocketThread::StopReading (const cCallback * a_Client)
|
||||
{
|
||||
// Returns true if client handled by this thread
|
||||
for (int i = m_NumSlots - 1; i >= 0; --i)
|
||||
{
|
||||
if (m_Slots[i].m_Client == a_Client)
|
||||
{
|
||||
m_Slots[i].m_ShouldCallClient = false;
|
||||
return true;
|
||||
}
|
||||
} // for i - m_Slots[]
|
||||
return false;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
bool cSocketThreads::cSocketThread::QueueClose(const cCallback * a_Client)
|
||||
{
|
||||
// Returns true if socket handled by this thread
|
||||
for (int i = m_NumSlots - 1; i >= 0; --i)
|
||||
{
|
||||
if (m_Slots[i].m_Client == a_Client)
|
||||
{
|
||||
m_Slots[i].m_ShouldClose = true;
|
||||
|
||||
// Notify the thread that there's a close queued (in case its conditions are already met):
|
||||
ASSERT(m_ControlSocket2.IsValid());
|
||||
m_ControlSocket2.Send("c", 1);
|
||||
|
||||
return true;
|
||||
}
|
||||
} // for i - m_Slots[]
|
||||
return false;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
bool cSocketThreads::cSocketThread::Start(void)
|
||||
{
|
||||
// Create the control socket listener
|
||||
@ -446,10 +389,13 @@ void cSocketThreads::cSocketThread::Execute(void)
|
||||
fd_set fdRead;
|
||||
cSocket::xSocket Highest = m_ControlSocket1.GetSocket();
|
||||
|
||||
PrepareSet(&fdRead, Highest);
|
||||
PrepareSet(&fdRead, Highest, false);
|
||||
|
||||
// Wait for the sockets:
|
||||
if (select(Highest + 1, &fdRead, NULL, NULL, NULL) == -1)
|
||||
timeval Timeout;
|
||||
Timeout.tv_sec = 5;
|
||||
Timeout.tv_usec = 0;
|
||||
if (select(Highest + 1, &fdRead, NULL, NULL, &Timeout) == -1)
|
||||
{
|
||||
LOG("select(R) call failed in cSocketThread: \"%s\"", cSocket::GetLastErrorString().c_str());
|
||||
continue;
|
||||
@ -460,8 +406,7 @@ void cSocketThreads::cSocketThread::Execute(void)
|
||||
// Test sockets for writing:
|
||||
fd_set fdWrite;
|
||||
Highest = m_ControlSocket1.GetSocket();
|
||||
PrepareSet(&fdWrite, Highest);
|
||||
timeval Timeout;
|
||||
PrepareSet(&fdWrite, Highest, true);
|
||||
Timeout.tv_sec = 0;
|
||||
Timeout.tv_usec = 0;
|
||||
if (select(Highest + 1, NULL, &fdWrite, NULL, &Timeout) == -1)
|
||||
@ -471,6 +416,8 @@ void cSocketThreads::cSocketThread::Execute(void)
|
||||
}
|
||||
|
||||
WriteToSockets(&fdWrite);
|
||||
|
||||
CleanUpShutSockets();
|
||||
} // while (!mShouldTerminate)
|
||||
}
|
||||
|
||||
@ -478,7 +425,7 @@ void cSocketThreads::cSocketThread::Execute(void)
|
||||
|
||||
|
||||
|
||||
void cSocketThreads::cSocketThread::PrepareSet(fd_set * a_Set, cSocket::xSocket & a_Highest)
|
||||
void cSocketThreads::cSocketThread::PrepareSet(fd_set * a_Set, cSocket::xSocket & a_Highest, bool a_IsForWriting)
|
||||
{
|
||||
FD_ZERO(a_Set);
|
||||
FD_SET(m_ControlSocket1.GetSocket(), a_Set);
|
||||
@ -490,6 +437,11 @@ void cSocketThreads::cSocketThread::PrepareSet(fd_set * a_Set, cSocket::xSocket
|
||||
{
|
||||
continue;
|
||||
}
|
||||
if (m_Slots[i].m_State == sSlot::ssRemoteClosed)
|
||||
{
|
||||
// This socket won't provide nor consume any data anymore, don't put it in the Set
|
||||
continue;
|
||||
}
|
||||
cSocket::xSocket s = m_Slots[i].m_Socket.GetSocket();
|
||||
FD_SET(s, a_Set);
|
||||
if (s > a_Highest)
|
||||
@ -525,29 +477,42 @@ void cSocketThreads::cSocketThread::ReadFromSockets(fd_set * a_Read)
|
||||
}
|
||||
char Buffer[1024];
|
||||
int Received = m_Slots[i].m_Socket.Receive(Buffer, ARRAYCOUNT(Buffer), 0);
|
||||
if (Received == 0)
|
||||
if (Received <= 0)
|
||||
{
|
||||
// The socket has been closed by the remote party, close our socket and let it be removed after we process all reading
|
||||
m_Slots[i].m_Socket.CloseSocket();
|
||||
if (m_Slots[i].m_ShouldCallClient)
|
||||
// The socket has been closed by the remote party
|
||||
switch (m_Slots[i].m_State)
|
||||
{
|
||||
m_Slots[i].m_Client->SocketClosed();
|
||||
}
|
||||
}
|
||||
else if (Received > 0)
|
||||
{
|
||||
if (m_Slots[i].m_ShouldCallClient)
|
||||
{
|
||||
m_Slots[i].m_Client->DataReceived(Buffer, Received);
|
||||
}
|
||||
case sSlot::ssNormal:
|
||||
{
|
||||
// Notify the callback that the remote has closed the socket; keep the slot
|
||||
m_Slots[i].m_Client->SocketClosed();
|
||||
m_Slots[i].m_State = sSlot::ssRemoteClosed;
|
||||
break;
|
||||
}
|
||||
case sSlot::ssWritingRestOut:
|
||||
case sSlot::ssShuttingDown:
|
||||
case sSlot::ssShuttingDown2:
|
||||
{
|
||||
// Force-close the socket and remove the slot:
|
||||
m_Slots[i].m_Socket.CloseSocket();
|
||||
m_Slots[i] = m_Slots[--m_NumSlots];
|
||||
break;
|
||||
}
|
||||
default:
|
||||
{
|
||||
LOG("%s: Unexpected socket state: %d (%s)",
|
||||
__FUNCTION__, m_Slots[i].m_Socket.GetSocket(), m_Slots[i].m_Socket.GetIPString().c_str()
|
||||
);
|
||||
ASSERT(!"Unexpected socket state");
|
||||
break;
|
||||
}
|
||||
} // switch (m_Slots[i].m_State)
|
||||
}
|
||||
else
|
||||
{
|
||||
// The socket has encountered an error, close it and let it be removed after we process all reading
|
||||
m_Slots[i].m_Socket.CloseSocket();
|
||||
if (m_Slots[i].m_ShouldCallClient)
|
||||
if (m_Slots[i].m_Client != NULL)
|
||||
{
|
||||
m_Slots[i].m_Client->SocketClosed();
|
||||
m_Slots[i].m_Client->DataReceived(Buffer, Received);
|
||||
}
|
||||
}
|
||||
} // for i - m_Slots[]
|
||||
@ -571,22 +536,17 @@ void cSocketThreads::cSocketThread::WriteToSockets(fd_set * a_Write)
|
||||
if (m_Slots[i].m_Outgoing.empty())
|
||||
{
|
||||
// Request another chunk of outgoing data:
|
||||
if (m_Slots[i].m_ShouldCallClient)
|
||||
if (m_Slots[i].m_Client != NULL)
|
||||
{
|
||||
m_Slots[i].m_Client->GetOutgoingData(m_Slots[i].m_Outgoing);
|
||||
}
|
||||
if (m_Slots[i].m_Outgoing.empty())
|
||||
{
|
||||
// Nothing ready
|
||||
if (m_Slots[i].m_ShouldClose)
|
||||
// No outgoing data is ready
|
||||
if (m_Slots[i].m_State == sSlot::ssWritingRestOut)
|
||||
{
|
||||
// Socket was queued for closing and there's no more data to send, close it now:
|
||||
|
||||
// DEBUG
|
||||
LOGD("Socket was queued for closing, closing now. Slot %d, client %p, socket %d", i, m_Slots[i].m_Client, m_Slots[i].m_Socket.GetSocket());
|
||||
|
||||
m_Slots[i].m_Socket.CloseSocket();
|
||||
// The slot must be freed actively by the client, using RemoveClient()
|
||||
m_Slots[i].m_State = sSlot::ssShuttingDown;
|
||||
m_Slots[i].m_Socket.ShutdownReadWrite();
|
||||
}
|
||||
continue;
|
||||
}
|
||||
@ -598,7 +558,7 @@ void cSocketThreads::cSocketThread::WriteToSockets(fd_set * a_Write)
|
||||
int Err = cSocket::GetLastError();
|
||||
LOGWARNING("Error %d while writing to client \"%s\", disconnecting. \"%s\"", Err, m_Slots[i].m_Socket.GetIPString().c_str(), cSocket::GetErrorString(Err).c_str());
|
||||
m_Slots[i].m_Socket.CloseSocket();
|
||||
if (m_Slots[i].m_ShouldCallClient)
|
||||
if (m_Slots[i].m_Client != NULL)
|
||||
{
|
||||
m_Slots[i].m_Client->SocketClosed();
|
||||
}
|
||||
@ -606,6 +566,12 @@ void cSocketThreads::cSocketThread::WriteToSockets(fd_set * a_Write)
|
||||
}
|
||||
m_Slots[i].m_Outgoing.erase(0, Sent);
|
||||
|
||||
if (m_Slots[i].m_Outgoing.empty() && (m_Slots[i].m_State == sSlot::ssWritingRestOut))
|
||||
{
|
||||
m_Slots[i].m_State = sSlot::ssShuttingDown;
|
||||
m_Slots[i].m_Socket.ShutdownReadWrite();
|
||||
}
|
||||
|
||||
// _X: If there's data left, it means the client is not reading fast enough, the server would unnecessarily spin in the main loop with zero actions taken; so signalling is disabled
|
||||
// This means that if there's data left, it will be sent only when there's incoming data or someone queues another packet (for any socket handled by this thread)
|
||||
/*
|
||||
@ -622,3 +588,31 @@ void cSocketThreads::cSocketThread::WriteToSockets(fd_set * a_Write)
|
||||
|
||||
|
||||
|
||||
|
||||
void cSocketThreads::cSocketThread::CleanUpShutSockets(void)
|
||||
{
|
||||
for (int i = m_NumSlots - 1; i >= 0; i--)
|
||||
{
|
||||
switch (m_Slots[i].m_State)
|
||||
{
|
||||
case sSlot::ssShuttingDown2:
|
||||
{
|
||||
// The socket has reached the shutdown timeout, close it and clear its slot:
|
||||
m_Slots[i].m_Socket.CloseSocket();
|
||||
m_Slots[i] = m_Slots[--m_NumSlots];
|
||||
break;
|
||||
}
|
||||
case sSlot::ssShuttingDown:
|
||||
{
|
||||
// The socket has been shut down for a single thread loop, let it loop once more before closing:
|
||||
m_Slots[i].m_State = sSlot::ssShuttingDown2;
|
||||
break;
|
||||
}
|
||||
default: break;
|
||||
}
|
||||
} // for i - m_Slots[]
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
@ -7,19 +7,20 @@
|
||||
|
||||
/*
|
||||
Additional details:
|
||||
When a client is terminating a connection:
|
||||
- they call the StopReading() method to disable callbacks for the incoming data
|
||||
- they call the Write() method to queue any outstanding outgoing data
|
||||
- they call the QueueClose() method to queue the socket to close after outgoing data has been sent.
|
||||
When a socket slot is marked as having no callback, it is kept alive until its outgoing data queue is empty and its m_ShouldClose flag is set.
|
||||
This means that the socket can be written to several times before finally closing it via QueueClose()
|
||||
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)
|
||||
/** How many clients should one thread handle? (must be less than FD_SETSIZE for your platform) */
|
||||
#define MAX_SLOTS 63
|
||||
|
||||
|
||||
@ -27,8 +28,6 @@ This means that the socket can be written to several times before finally closin
|
||||
|
||||
|
||||
#pragma once
|
||||
#ifndef CSOCKETTHREADS_H_INCLUDED
|
||||
#define CSOCKETTHREADS_H_INCLUDED
|
||||
|
||||
#include "Socket.h"
|
||||
#include "IsThread.h"
|
||||
@ -64,13 +63,13 @@ public:
|
||||
// Force a virtual destructor in all subclasses:
|
||||
virtual ~cCallback() {}
|
||||
|
||||
/// Called when data is received from the remote party
|
||||
/** Called when data is received from the remote party */
|
||||
virtual void DataReceived(const char * a_Data, int a_Size) = 0;
|
||||
|
||||
/// Called when data can be sent to remote party; the function is supposed to append outgoing data to a_Data
|
||||
/** Called when data can be sent to remote party; the function is supposed to *append* outgoing data to a_Data */
|
||||
virtual void GetOutgoingData(AString & a_Data) = 0;
|
||||
|
||||
/// Called when the socket has been closed for any reason
|
||||
/** Called when the socket has been closed for any reason */
|
||||
virtual void SocketClosed(void) = 0;
|
||||
} ;
|
||||
|
||||
@ -78,26 +77,21 @@ public:
|
||||
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
|
||||
/** 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 data and is removed only after all its m_OutgoingData is sent
|
||||
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
|
||||
/** 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
|
||||
/** Puts a_Data into outgoing data queue for a_Client */
|
||||
void Write(const cCallback * a_Client, const AString & a_Data);
|
||||
|
||||
/// Stops reading from the client - when this call returns, no more calls to the callbacks are made
|
||||
void StopReading(const cCallback * a_Client);
|
||||
|
||||
/// Queues the client for closing, as soon as its outgoing data is sent
|
||||
void QueueClose(const cCallback * a_Client);
|
||||
|
||||
private:
|
||||
|
||||
class cSocketThread :
|
||||
@ -120,8 +114,6 @@ private:
|
||||
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 StopReading (const cCallback * a_Client); // Returns true if client handled by this thread
|
||||
bool QueueClose (const cCallback * a_Client); // 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
|
||||
|
||||
@ -135,24 +127,45 @@ private:
|
||||
cSocket m_ControlSocket1;
|
||||
cSocket m_ControlSocket2;
|
||||
|
||||
// Socket-client-packetqueues triplets.
|
||||
// Socket-client-dataqueues-state quadruplets.
|
||||
// Manipulation with these assumes that the parent's m_CS is locked
|
||||
struct sSlot
|
||||
{
|
||||
cSocket m_Socket; // The socket is primarily owned by this
|
||||
/** The socket is primarily owned by this object */
|
||||
cSocket m_Socket;
|
||||
|
||||
/** The callback to call for events. May be NULL */
|
||||
cCallback * m_Client;
|
||||
AString m_Outgoing; // If sending writes only partial data, the rest is stored here for another send
|
||||
bool m_ShouldClose; // If true, the socket is to be closed after sending all outgoing data
|
||||
bool m_ShouldCallClient; // If true, the client callbacks are called. Set to false in StopReading()
|
||||
|
||||
/** 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;
|
||||
|
||||
void PrepareSet (fd_set * a_Set, cSocket::xSocket & a_Highest); // Puts all sockets into the set, along with m_ControlSocket1
|
||||
/** Puts all sockets into the set, along with m_ControlSocket1.
|
||||
Only sockets that are able to send and receive data are put in the Set.
|
||||
Is a_IsForWriting is true, the ssWritingRestOut sockets are added as well. */
|
||||
void PrepareSet(fd_set * a_Set, cSocket::xSocket & a_Highest, bool a_IsForWriting);
|
||||
|
||||
void ReadFromSockets(fd_set * a_Read); // Reads from sockets indicated in a_Read
|
||||
void WriteToSockets (fd_set * a_Write); // Writes to sockets indicated in a_Write
|
||||
|
||||
/** Removes those slots in ssShuttingDown2 state, sets those with ssShuttingDown state to ssShuttingDown2 */
|
||||
void CleanUpShutSockets(void);
|
||||
} ;
|
||||
|
||||
typedef std::list<cSocketThread *> cSocketThreadList;
|
||||
@ -165,9 +178,3 @@ private:
|
||||
|
||||
|
||||
|
||||
|
||||
#endif // CSOCKETTHREADS_H_INCLUDED
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
@ -118,7 +118,7 @@ cServer::cServer(void) :
|
||||
|
||||
void cServer::ClientDestroying(const cClientHandle * a_Client)
|
||||
{
|
||||
m_SocketThreads.StopReading(a_Client);
|
||||
m_SocketThreads.RemoveClient(a_Client);
|
||||
}
|
||||
|
||||
|
||||
@ -143,15 +143,6 @@ void cServer::WriteToClient(const cClientHandle * a_Client, const AString & a_Da
|
||||
|
||||
|
||||
|
||||
void cServer::QueueClientClose(const cClientHandle * a_Client)
|
||||
{
|
||||
m_SocketThreads.QueueClose(a_Client);
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
void cServer::RemoveClient(const cClientHandle * a_Client)
|
||||
{
|
||||
m_SocketThreads.RemoveClient(a_Client);
|
||||
|
||||
@ -88,14 +88,14 @@ public: // tolua_export
|
||||
|
||||
const AString & GetServerID(void) const { return m_ServerID; } // tolua_export
|
||||
|
||||
void ClientDestroying(const cClientHandle * a_Client); // Called by cClientHandle::Destroy(); stop m_SocketThreads from calling back into a_Client
|
||||
/** Called by cClientHandle's destructor; stop m_SocketThreads from calling back into a_Client */
|
||||
void ClientDestroying(const cClientHandle * a_Client);
|
||||
|
||||
void NotifyClientWrite(const cClientHandle * a_Client); // Notifies m_SocketThreads that client has something to be written
|
||||
/** Notifies m_SocketThreads that client has something to be written */
|
||||
void NotifyClientWrite(const cClientHandle * a_Client);
|
||||
|
||||
void WriteToClient(const cClientHandle * a_Client, const AString & a_Data); // Queues outgoing data for the client through m_SocketThreads
|
||||
|
||||
void QueueClientClose(const cClientHandle * a_Client); // Queues the clienthandle to close when all its outgoing data is sent
|
||||
|
||||
void RemoveClient(const cClientHandle * a_Client); // Removes the clienthandle from m_SocketThreads
|
||||
|
||||
/// Don't tick a_Client anymore, it will be ticked from its cPlayer instead
|
||||
|
||||
Loading…
Reference in New Issue
Block a user