Ensure that data is not overwritten in the audio input shared memory ring buffer that sits on the b…

base/sync_socket.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 BASE_SYNC_SOCKET_H_
 #define BASE_SYNC_SOCKET_H_
 
 // A socket abstraction used for sending and receiving plain
 // data.  Because the receiving is blocking, they can be used to perform
 // rudimentary cross-process synchronization with low latency.
@@ skipping 65 matching lines @@
   virtual size_t Receive(void* buffer, size_t length);
 
   // Same as Receive() but only blocks for data until |timeout| has elapsed or
   // |buffer| |length| is exhausted.  Currently only timeouts less than one
   // second are allowed.  Return the amount of data read.
   virtual size_t ReceiveWithTimeout(void* buffer,
                                     size_t length,
                                     TimeDelta timeout);
 
   // Returns the number of bytes available. If non-zero, Receive() will not
-  // not block when called. NOTE: Some implementations cannot reliably
-  // determine the number of bytes available so avoid using the returned
-  // size as a promise and simply test against zero.
-  size_t Peek();
+  // not block when called.
+  virtual size_t Peek();
 
   // Extracts the contained handle.  Used for transferring between
   // processes.
   Handle handle() const { return handle_; }
 
  protected:
   Handle handle_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SyncSocket);
@@ skipping 48 matching lines @@
 
 #if defined(OS_WIN) && !defined(COMPONENT_BUILD)
 // TODO(cpu): remove this once chrome is split in two dlls.
 __declspec(selectany)
     const SyncSocket::Handle SyncSocket::kInvalidHandle = INVALID_HANDLE_VALUE;
 #endif
 
 }  // namespace base
 
 #endif  // BASE_SYNC_SOCKET_H_