Add support for setting the SO_REUSEADDR option for sockets

src/platform-macos.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 575 matching lines @@
   // Client initialization.
   bool Connect(const char* host, const char* port);
 
   // Shutdown socket for both read and write.
   bool Shutdown();
 
   // Data Transimission
   int Send(const char* data, int len) const;
   int Receive(char* data, int len) const;
 
+  bool SetReuseAddress(bool reuse_address);
+
   bool IsValid() const { return socket_ != -1; }
 
  private:
   int socket_;
 };
 
 
 bool MacOSSocket::Bind(const int port) {
   if (!IsValid())  {
     return false;
@@ skipping 82 matching lines @@
   return status;
 }
 
 
 int MacOSSocket::Receive(char* data, int len) const {
   int status = recv(socket_, data, len, 0);
   return status;
 }
 
 
+bool MacOSSocket::SetReuseAddress(bool reuse_address) {
+  int on = reuse_address ? 1 : 0;
+  int status = setsockopt(socket_, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
+  return status == 0;
+}
+
+
 bool Socket::Setup() {
   // Nothing to do on MacOS.
   return true;
 }
 
 
 int Socket::LastError() {
   return errno;
 }
 
@@ skipping 116 matching lines @@
   }
 
   // This sampler is no longer the active sampler.
   active_sampler_ = NULL;
   active_ = false;
 }
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal