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-rw-r--r--src/OSSupport/NetworkSingleton.h134
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diff --git a/src/OSSupport/NetworkSingleton.h b/src/OSSupport/NetworkSingleton.h
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+
+// NetworkSingleton.h
+
+// Declares the cNetworkSingleton class representing the storage for global data pertaining to network API
+// such as a list of all connections, all listening sockets and the LibEvent dispatch thread.
+
+// This is an internal header, no-one outside OSSupport should need to include it; use Network.h instead
+
+
+
+
+
+#pragma once
+
+#include "Network.h"
+#include "CriticalSection.h"
+#include "Event.h"
+
+
+
+
+
+// fwd:
+struct event_base;
+struct evdns_base;
+class cTCPLinkImpl;
+typedef SharedPtr<cTCPLinkImpl> cTCPLinkImplPtr;
+typedef std::vector<cTCPLinkImplPtr> cTCPLinkImplPtrs;
+class cServerHandleImpl;
+typedef SharedPtr<cServerHandleImpl> cServerHandleImplPtr;
+typedef std::vector<cServerHandleImplPtr> cServerHandleImplPtrs;
+class cHostnameLookup;
+typedef SharedPtr<cHostnameLookup> cHostnameLookupPtr;
+typedef std::vector<cHostnameLookupPtr> cHostnameLookupPtrs;
+class cIPLookup;
+typedef SharedPtr<cIPLookup> cIPLookupPtr;
+typedef std::vector<cIPLookupPtr> cIPLookupPtrs;
+
+
+
+
+
+class cNetworkSingleton
+{
+public:
+ ~cNetworkSingleton();
+
+ /** Returns the singleton instance of this class */
+ static cNetworkSingleton & Get(void);
+
+ /** Returns the main LibEvent handle for event registering. */
+ event_base * GetEventBase(void) { return m_EventBase; }
+
+ /** Returns the LibEvent handle for DNS lookups. */
+ evdns_base * GetDNSBase(void) { return m_DNSBase; }
+
+ /** Adds the specified hostname lookup to m_HostnameLookups.
+ Used by the underlying lookup implementation when a new lookup is initiated. */
+ void AddHostnameLookup(cHostnameLookupPtr a_HostnameLookup);
+
+ /** Removes the specified hostname lookup from m_HostnameLookups.
+ Used by the underlying lookup implementation when the lookup is finished. */
+ void RemoveHostnameLookup(const cHostnameLookup * a_HostnameLookup);
+
+ /** Adds the specified IP lookup to M_IPLookups.
+ Used by the underlying lookup implementation when a new lookup is initiated. */
+ void AddIPLookup(cIPLookupPtr a_IPLookup);
+
+ /** Removes the specified IP lookup from m_IPLookups.
+ Used by the underlying lookup implementation when the lookup is finished. */
+ void RemoveIPLookup(const cIPLookup * a_IPLookup);
+
+ /** Adds the specified link to m_Connections.
+ Used by the underlying link implementation when a new link is created. */
+ void AddLink(cTCPLinkImplPtr a_Link);
+
+ /** Removes the specified link from m_Connections.
+ Used by the underlying link implementation when the link is closed / errored. */
+ void RemoveLink(const cTCPLinkImpl * a_Link);
+
+ /** Adds the specified link to m_Servers.
+ Used by the underlying server handle implementation when a new listening server is created.
+ Only servers that succeed in listening are added. */
+ void AddServer(cServerHandleImplPtr a_Server);
+
+ /** Removes the specified server from m_Servers.
+ Used by the underlying server handle implementation when the server is closed. */
+ void RemoveServer(const cServerHandleImpl * a_Server);
+
+protected:
+
+ /** The main LibEvent container for driving the event loop. */
+ event_base * m_EventBase;
+
+ /** The LibEvent handle for doing DNS lookups. */
+ evdns_base * m_DNSBase;
+
+ /** Container for all client connections, including ones with pending-connect. */
+ cTCPLinkImplPtrs m_Connections;
+
+ /** Container for all servers that are currently active. */
+ cServerHandleImplPtrs m_Servers;
+
+ /** Container for all pending hostname lookups. */
+ cHostnameLookupPtrs m_HostnameLookups;
+
+ /** Container for all pending IP lookups. */
+ cIPLookupPtrs m_IPLookups;
+
+ /** Mutex protecting all containers against multithreaded access. */
+ cCriticalSection m_CS;
+
+ /** Event that gets signalled when the event loop terminates. */
+ cEvent m_EventLoopTerminated;
+
+
+ /** Initializes the LibEvent internals. */
+ cNetworkSingleton(void);
+
+ /** Converts LibEvent-generated log events into log messages in MCS log. */
+ static void LogCallback(int a_Severity, const char * a_Msg);
+
+ /** Implements the thread that runs LibEvent's event dispatcher loop. */
+ static void RunEventLoop(cNetworkSingleton * a_Self);
+};
+
+
+
+
+
+
+
+
+