Add Socket::ReadIfReady()

net/socket/socket_bio_adapter.h

 // Copyright 2016 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 NET_SOCKET_SOCKET_BIO_ADAPTER_H_
 #define NET_SOCKET_SOCKET_BIO_ADAPTER_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "net/base/completion_callback.h"
@@ skipping 35 matching lines @@
   //
   // Callers should implement these methods and, when signaled, retry the
   // BIO_read or BIO_write. This usually is done by retrying a higher-level
   // operation, such as SSL_read or SSL_write.
   //
   // Callers may assume that OnReadReady and OnWriteReady will only be called
   // from a PostTask or StreamSocket callback.
   class Delegate {
    public:
     // Called when the BIO is ready to handle BIO_read, after having previously
-    // been blocked.
-    virtual void OnReadReady() = 0;
+    // been blocked. |rv| is an error code if an error occurred or OK.
+    virtual void OnReadReady(int rv) = 0;
 
     // Called when the BIO is ready to handle BIO_write, after having previously
-    // been blocked.
-    virtual void OnWriteReady() = 0;
+    // been blocked. |rv| is an error code if an error occurred or OK.
+    virtual void OnWriteReady(int rv) = 0;
 
    protected:
     virtual ~Delegate() {}
   };
 
   // Creates a new SocketBIOAdapter for the specified socket. |socket| and
   // |delegate| must remain valid for the lifetime of the SocketBIOAdapter.
   SocketBIOAdapter(StreamSocket* socket,
                    int read_buffer_capacity,
                    int write_buffer_capacity,
                    Delegate* delegate);
   ~SocketBIOAdapter();
 
   BIO* bio() { return bio_.get(); }
 
   // Returns true if any data has been read from the underlying StreamSocket,
   // but not yet consumed by the BIO.
   bool HasPendingReadData();
 
   // Returns the allocation size estimate in bytes.
   size_t GetAllocationSize() const;
 
  private:
   int BIORead(char* out, int len);
   void HandleSocketReadResult(int result);
   void OnSocketReadComplete(int result);
+  void OnSocketReadIfReadyComplete(int result);
 
   int BIOWrite(const char* in, int len);
   void SocketWrite();
   void HandleSocketWriteResult(int result);
   void OnSocketWriteComplete(int result);
-  void CallOnReadReady();
+  void CallOnReadReady(int rv);
 
   static SocketBIOAdapter* GetAdapter(BIO* bio);
   static int BIOReadWrapper(BIO* bio, char* out, int len);
   static int BIOWriteWrapper(BIO* bio, const char* in, int len);
   static long BIOCtrlWrapper(BIO* bio, int cmd, long larg, void* parg);
 
   static const BIO_METHOD kBIOMethod;
 
   bssl::UniquePtr<BIO> bio_;
 
@@ skipping 32 matching lines @@
   Delegate* delegate_;
 
   base::WeakPtrFactory<SocketBIOAdapter> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SocketBIOAdapter);
 };
 
 }  // namespace net
 
 #endif  // NET_SOCKET_SOCKET_BIO_ADAPTER_H_