emulator: opengl: Back-port GLES emulation from the master tree.

The modules here are only built when BUILD_EMULATOR_OPENGL is defined to true
in your environment or your BoardConfig.mk (see tools/emulator/opengl/Android.mk)

Change-Id: I5f32c35b4452fb5a7b4d5f9fc5870ec1da6032e6

tools/emulator/opengl/shared/OpenglCodecCommon/TcpStream.cpp

@@ -0,0 +1,91 @@
+/*
+* Copyright (C) 2011 The Android Open Source Project
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+#include "TcpStream.h"
+#include <cutils/sockets.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+
+#ifndef _WIN32
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#else
+#include <ws2tcpip.h>
+#endif
+
+TcpStream::TcpStream(size_t bufSize) :
+    SocketStream(bufSize)
+{
+}
+
+TcpStream::TcpStream(int sock, size_t bufSize) :
+    SocketStream(sock, bufSize)
+{
+    // disable Nagle algorithm to improve bandwidth of small
+    // packets which are quite common in our implementation.
+#ifdef _WIN32
+    DWORD  flag;
+#else
+    int    flag;
+#endif
+    flag = 1;
+    setsockopt( sock, IPPROTO_TCP, TCP_NODELAY, (const char*)&flag, sizeof(flag) );
+}
+
+int TcpStream::listen(unsigned short port)
+{
+    m_sock = socket_loopback_server(port, SOCK_STREAM);
+    if (!valid()) return int(ERR_INVALID_SOCKET);
+
+    return 0;
+}
+
+SocketStream * TcpStream::accept()
+{
+    int clientSock = -1;
+
+    while (true) {
+        struct sockaddr_in addr;
+        socklen_t len = sizeof(addr);
+        clientSock = ::accept(m_sock, (sockaddr *)&addr, &len);
+
+        if (clientSock < 0 && errno == EINTR) {
+            continue;
+        }
+        break;
+    }
+
+    TcpStream *clientStream = NULL;
+
+    if (clientSock >= 0) {
+        clientStream =  new TcpStream(clientSock, m_bufsize);
+    }
+    return clientStream;
+}
+
+int TcpStream::connect(unsigned short port)
+{
+    return connect("127.0.0.1",port);
+}
+
+int TcpStream::connect(const char* hostname, unsigned short port)
+{
+    m_sock = socket_network_client(hostname, port, SOCK_STREAM);
+    if (!valid()) return -1;
+    return 0;
+}