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/*
* Copyright 2004 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef WEBRTC_BASE_PHYSICALSOCKETSERVER_H__
#define WEBRTC_BASE_PHYSICALSOCKETSERVER_H__
#include <vector>
#include "webrtc/base/asyncfile.h"
#include "webrtc/base/scoped_ptr.h"
#include "webrtc/base/socketserver.h"
#include "webrtc/base/criticalsection.h"
#if defined(WEBRTC_POSIX)
typedef int SOCKET;
#endif // WEBRTC_POSIX
namespace rtc {
// Event constants for the Dispatcher class.
enum DispatcherEvent {
DE_READ = 0x0001,
DE_WRITE = 0x0002,
DE_CONNECT = 0x0004,
DE_CLOSE = 0x0008,
DE_ACCEPT = 0x0010,
};
class Signaler;
#if defined(WEBRTC_POSIX)
class PosixSignalDispatcher;
#endif
class Dispatcher {
public:
virtual ~Dispatcher() {}
virtual uint32_t GetRequestedEvents() = 0;
virtual void OnPreEvent(uint32_t ff) = 0;
virtual void OnEvent(uint32_t ff, int err) = 0;
#if defined(WEBRTC_WIN)
virtual WSAEVENT GetWSAEvent() = 0;
virtual SOCKET GetSocket() = 0;
virtual bool CheckSignalClose() = 0;
#elif defined(WEBRTC_POSIX)
virtual int GetDescriptor() = 0;
virtual bool IsDescriptorClosed() = 0;
#endif
};
// A socket server that provides the real sockets of the underlying OS.
class PhysicalSocketServer : public SocketServer {
public:
PhysicalSocketServer();
~PhysicalSocketServer() override;
// SocketFactory:
Socket* CreateSocket(int type) override;
Socket* CreateSocket(int family, int type) override;
AsyncSocket* CreateAsyncSocket(int type) override;
AsyncSocket* CreateAsyncSocket(int family, int type) override;
// Internal Factory for Accept
AsyncSocket* WrapSocket(SOCKET s);
// SocketServer:
bool Wait(int cms, bool process_io) override;
void WakeUp() override;
void Add(Dispatcher* dispatcher);
void Remove(Dispatcher* dispatcher);
#if defined(WEBRTC_POSIX)
AsyncFile* CreateFile(int fd);
// Sets the function to be executed in response to the specified POSIX signal.
// The function is executed from inside Wait() using the "self-pipe trick"--
// regardless of which thread receives the signal--and hence can safely
// manipulate user-level data structures.
// "handler" may be SIG_IGN, SIG_DFL, or a user-specified function, just like
// with signal(2).
// Only one PhysicalSocketServer should have user-level signal handlers.
// Dispatching signals on multiple PhysicalSocketServers is not reliable.
// The signal mask is not modified. It is the caller's responsibily to
// maintain it as desired.
virtual bool SetPosixSignalHandler(int signum, void (*handler)(int));
protected:
Dispatcher* signal_dispatcher();
#endif
private:
typedef std::vector<Dispatcher*> DispatcherList;
typedef std::vector<size_t*> IteratorList;
#if defined(WEBRTC_POSIX)
static bool InstallSignal(int signum, void (*handler)(int));
scoped_ptr<PosixSignalDispatcher> signal_dispatcher_;
#endif
DispatcherList dispatchers_;
IteratorList iterators_;
Signaler* signal_wakeup_;
CriticalSection crit_;
bool fWait_;
#if defined(WEBRTC_WIN)
WSAEVENT socket_ev_;
#endif
};
} // namespace rtc
#endif // WEBRTC_BASE_PHYSICALSOCKETSERVER_H__
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