28e2075280
trunk/talk git-svn-id: http://webrtc.googlecode.com/svn/trunk@4318 4adac7df-926f-26a2-2b94-8c16560cd09d
140 lines
4.4 KiB
C++
140 lines
4.4 KiB
C++
/*
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* libjingle
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* Copyright 2004--2005, Google Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TALK_BASE_PHYSICALSOCKETSERVER_H__
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#define TALK_BASE_PHYSICALSOCKETSERVER_H__
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#include <vector>
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#include "talk/base/asyncfile.h"
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#include "talk/base/scoped_ptr.h"
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#include "talk/base/socketserver.h"
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#include "talk/base/criticalsection.h"
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#ifdef POSIX
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typedef int SOCKET;
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#endif // POSIX
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namespace talk_base {
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// Event constants for the Dispatcher class.
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enum DispatcherEvent {
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DE_READ = 0x0001,
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DE_WRITE = 0x0002,
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DE_CONNECT = 0x0004,
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DE_CLOSE = 0x0008,
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DE_ACCEPT = 0x0010,
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};
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class Signaler;
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#ifdef POSIX
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class PosixSignalDispatcher;
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#endif
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class Dispatcher {
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public:
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virtual ~Dispatcher() {}
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virtual uint32 GetRequestedEvents() = 0;
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virtual void OnPreEvent(uint32 ff) = 0;
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virtual void OnEvent(uint32 ff, int err) = 0;
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#ifdef WIN32
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virtual WSAEVENT GetWSAEvent() = 0;
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virtual SOCKET GetSocket() = 0;
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virtual bool CheckSignalClose() = 0;
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#elif POSIX
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virtual int GetDescriptor() = 0;
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virtual bool IsDescriptorClosed() = 0;
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#endif
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};
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// A socket server that provides the real sockets of the underlying OS.
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class PhysicalSocketServer : public SocketServer {
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public:
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PhysicalSocketServer();
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virtual ~PhysicalSocketServer();
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// SocketFactory:
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virtual Socket* CreateSocket(int type);
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virtual Socket* CreateSocket(int family, int type);
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virtual AsyncSocket* CreateAsyncSocket(int type);
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virtual AsyncSocket* CreateAsyncSocket(int family, int type);
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// Internal Factory for Accept
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AsyncSocket* WrapSocket(SOCKET s);
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// SocketServer:
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virtual bool Wait(int cms, bool process_io);
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virtual void WakeUp();
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void Add(Dispatcher* dispatcher);
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void Remove(Dispatcher* dispatcher);
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#ifdef POSIX
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AsyncFile* CreateFile(int fd);
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// Sets the function to be executed in response to the specified POSIX signal.
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// The function is executed from inside Wait() using the "self-pipe trick"--
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// regardless of which thread receives the signal--and hence can safely
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// manipulate user-level data structures.
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// "handler" may be SIG_IGN, SIG_DFL, or a user-specified function, just like
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// with signal(2).
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// Only one PhysicalSocketServer should have user-level signal handlers.
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// Dispatching signals on multiple PhysicalSocketServers is not reliable.
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// The signal mask is not modified. It is the caller's responsibily to
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// maintain it as desired.
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virtual bool SetPosixSignalHandler(int signum, void (*handler)(int));
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protected:
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Dispatcher* signal_dispatcher();
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#endif
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private:
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typedef std::vector<Dispatcher*> DispatcherList;
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typedef std::vector<size_t*> IteratorList;
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#ifdef POSIX
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static bool InstallSignal(int signum, void (*handler)(int));
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scoped_ptr<PosixSignalDispatcher> signal_dispatcher_;
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#endif
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DispatcherList dispatchers_;
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IteratorList iterators_;
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Signaler* signal_wakeup_;
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CriticalSection crit_;
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bool fWait_;
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uint32 last_tick_tracked_;
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int last_tick_dispatch_count_;
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#ifdef WIN32
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WSAEVENT socket_ev_;
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#endif
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};
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} // namespace talk_base
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#endif // TALK_BASE_PHYSICALSOCKETSERVER_H__
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