Socket subsystem implementation

libraries/nacl-mounts/net/ProxyStream.h

+// Copyright (c) 2012 The Chromium OS 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 PROXY_STREAM_H
+#define PROXY_STREAM_H
+
+#include "base/pthread_helpers.h"
+#include "net/socket_subsystem.h"
+
+class ProxyStream : public FileStream {
+ public:
+  ProxyStream(int fd, int oflag, FileStream* orig)
+    : ref_(1), fd_(fd), oflag_(oflag), orig_(orig) {
+    orig->addref();
+  }
+  virtual ~ProxyStream() {
+    orig_->release();
+  }
+
+  void addref() {
+    ++ref_;
+  }
+  void release() {
+    if (!--ref_)
+      delete this;
+  }
+  virtual FileStream* dup(int fd) {
+    return new ProxyStream(fd, oflag_, orig_);
+  }
+
+  virtual void close() {
+  }
+  virtual int read(char* buf, size_t count, size_t* nread) {
+    return orig_->read(buf, count, nread);
+  }
+  virtual int write(const char* buf, size_t count, size_t* nwrote) {
+    return orig_->write(buf, count, nwrote);
+  }
+
+  virtual int seek(nacl_abi_off_t offset, int whence,
+                   nacl_abi_off_t* new_offset) {
+    return orig_->seek(offset, whence, new_offset);
+  }
+  virtual int fstat(nacl_abi_stat* out) {
+    return orig_->fstat(out);
+  }
+  virtual int getdents(dirent* buf, size_t count, size_t* nread) {
+    return orig_->getdents(buf, count, nread);
+  }
+
+  virtual int isatty() {
+    return orig_->isatty();
+  }
+  virtual int tcgetattr(termios* termios_p) {
+    return orig_->tcgetattr(termios_p);
+  }
+  virtual int tcsetattr(int optional_actions, const termios* termios_p) {
+    return orig_->tcsetattr(optional_actions, termios_p);
+  }
+  virtual int fcntl(int cmd,  va_list ap) {
+    return orig_->fcntl(cmd, ap);
+  }
+  virtual int ioctl(int request, va_list ap) {
+    return orig_->ioctl(request, ap);
+  }
+
+  virtual bool is_read_ready() {
+    return orig_->is_read_ready();
+  }
+  virtual bool is_write_ready() {
+    return orig_->is_write_ready();
+  }
+  virtual bool is_exception() {
+    return orig_->is_exception();
+  }
+
+ private:
+  int ref_;
+  int fd_;
+  int oflag_;
+  FileStream* orig_;
+
+  DISALLOW_COPY_AND_ASSIGN(ProxyStream);
+};
+
+#endif  // PROXY_STREAM_H
+