text: /*
   * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
   *
   * Licensed under the Apache License 2.0 (the "License").  You may not use
   * this file except in compliance with the License.  You can obtain a copy
   * in the file LICENSE in the source distribution or at
   * https://www.openssl.org/source/license.html
   */
  
  #ifndef HEADER_ASYNC_BIO
  #define HEADER_ASYNC_BIO
  
  #include <openssl/base.h>
  #include <openssl/bio.h>
  
  
  // AsyncBioCreate creates a filter BIO for testing asynchronous state
  // machines which consume a stream socket. Reads and writes will fail
  // and return EAGAIN unless explicitly allowed. Each async BIO has a
  // read quota and a write quota. Initially both are zero. As each is
  // incremented, bytes are allowed to flow through the BIO.
  bssl::UniquePtr<BIO> AsyncBioCreate();
  
  // AsyncBioCreateDatagram creates a filter BIO for testing for
  // asynchronous state machines which consume datagram sockets. The read
  // and write quota count in packets rather than bytes.
  bssl::UniquePtr<BIO> AsyncBioCreateDatagram();
  
  // AsyncBioAllowRead increments |bio|'s read quota by |count|.
  void AsyncBioAllowRead(BIO *bio, size_t count);
  
  // AsyncBioAllowWrite increments |bio|'s write quota by |count|.
  void AsyncBioAllowWrite(BIO *bio, size_t count);
  
  // AsyncBioEnforceWriteQuota configures where |bio| enforces its write quota.
  void AsyncBioEnforceWriteQuota(BIO *bio, bool enforce);
  
  
  #endif  // HEADER_ASYNC_BIO
  