[NaCl SDK] Support non blocking TCP/UDP

native_client_sdk/src/libraries/nacl_io/kernel_proxy.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef LIBRARIES_NACL_IO_KERNEL_PROXY_H_
 #define LIBRARIES_NACL_IO_KERNEL_PROXY_H_
 
 #include <map>
 #include <string>
 
+#include "nacl_io/event_emitter_signal.h"
 #include "nacl_io/host_resolver.h"
 #include "nacl_io/kernel_object.h"
 #include "nacl_io/mount_factory.h"
-#include "nacl_io/mount_socket.h"
+#include "nacl_io/mount_stream.h"
 #include "nacl_io/ossignal.h"
 #include "nacl_io/ossocket.h"
 #include "nacl_io/ostypes.h"
 #include "nacl_io/osutime.h"
 
 struct timeval;
 
 namespace nacl_io {
 
 class PepperInterface;
-class SignalEmitter;
 
-typedef sdk_util::ScopedRef<SignalEmitter> ScopedSignalEmitter;
 
 // KernelProxy provide one-to-one mapping for libc kernel calls.  Calls to the
 // proxy will result in IO access to the provided Mount and MountNode objects.
 //
 // NOTE: The KernelProxy does not directly take any kernel locks, all locking
 // is done by the parent class KernelObject.  Instead, KernelProxy is
 // responsible for taking the locks of the KernelHandle, and MountNode objects.
 // For this reason, a KernelObject call should not be done while holding
 // a handle or node lock.  In addition, to ensure locking order,
 // a KernelHandle lock must never be taken after taking the associated
 // MountNode's lock.
 //
 // NOTE: The KernelProxy is the only class that should be setting errno. All
 // other classes should return Error (as defined by nacl_io/error.h).
 class KernelProxy : protected KernelObject {
  public:
   typedef std::map<std::string, MountFactory*> MountFactoryMap_t;
 
   KernelProxy();
   virtual ~KernelProxy();
 
   // Takes ownership of |ppapi|.
   // |ppapi| may be NULL. If so, no mount that uses pepper calls can be mounted.
   virtual Error Init(PepperInterface* ppapi);
 
+  virtual int pipe(int pipefds[2]);
+
   // NaCl-only function to read resources specified in the NMF file.
   virtual int open_resource(const char* file);
 
   // KernelHandle and FD allocation and manipulation functions.
   virtual int open(const char* path, int oflag);
   virtual int close(int fd);
   virtual int dup(int fd);
   virtual int dup2(int fd, int newfd);
 
   // Path related System calls handled by KernelProxy (not mount-specific)
@@ skipping 112 matching lines @@
                          int optname,
                          const void* optval,
                          socklen_t len);
   virtual int shutdown(int fd, int how);
   virtual int socket(int domain, int type, int protocol);
   virtual int socketpair(int domain, int type, int protocol, int* sv);
 #endif  // PROVIDES_SOCKET_API
 
  protected:
   MountFactoryMap_t factories_;
-  sdk_util::ScopedRef<MountSocket> socket_mount_;
+  sdk_util::ScopedRef<MountStream> stream_mount_;
   int dev_;
   PepperInterface* ppapi_;
   static KernelProxy *s_instance_;
   sighandler_t sigwinch_handler_;
 #ifdef PROVIDES_SOCKET_API
   HostResolver host_resolver_;
 #endif
 
 #ifdef PROVIDES_SOCKET_API
   virtual int AcquireSocketHandle(int fd, ScopedKernelHandle* handle);
 #endif
 
-  ScopedSignalEmitter signal_emitter_;
+  ScopedEmitterSignal signal_emitter_;
   DISALLOW_COPY_AND_ASSIGN(KernelProxy);
 };
 
 }  // namespace nacl_io
 
 #endif  // LIBRARIES_NACL_IO_KERNEL_PROXY_H_