lib/async-append-null.c

   1 /* Copyright (c) 2013 Nicira, Inc.
   2  *
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15
  16 #include <config.h>
  17
  18 /* This is a null implementation of the asynchronous I/O interface for systems
  19  * that don't have a form of asynchronous I/O. */
  20
  21 #include "async-append.h"
  22
  23 #include <stdlib.h>
  24 #include <unistd.h>
  25
  26 #include "util.h"
  27
  28 struct async_append *
  29 async_append_create(int fd OVS_UNUSED)
  30 {
  31     return NULL;
  32 }
  33
  34 void
  35 async_append_destroy(struct async_append *ap)
  36 {
  37     ovs_assert(ap == NULL);
  38 }
  39
  40 void
  41 async_append_write(struct async_append *ap OVS_UNUSED,
  42                    const void *data OVS_UNUSED, size_t size OVS_UNUSED)
  43 {
  44     OVS_NOT_REACHED();
  45 }
  46
  47 void
  48 async_append_flush(struct async_append *ap OVS_UNUSED)
  49 {
  50     OVS_NOT_REACHED();
  51 }