io/channel-util.c

   1 /*
   2  * QEMU I/O channels utility APIs
   3  *
   4  * Copyright (c) 2016 Red Hat, Inc.
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  *
  19  */
  20
  21 #include "qemu/osdep.h"
  22 #include "io/channel-util.h"
  23 #include "io/channel-file.h"
  24 #include "io/channel-socket.h"
  25
  26
  27 QIOChannel *qio_channel_new_fd(int fd,
  28                                Error **errp)
  29 {
  30     QIOChannel *ioc;
  31
  32     if (fd_is_socket(fd)) {
  33         ioc = QIO_CHANNEL(qio_channel_socket_new_fd(fd, errp));
  34     } else {
  35         ioc = QIO_CHANNEL(qio_channel_file_new_fd(fd));
  36     }
  37     return ioc;
  38 }
  39
  40
  41 void qio_channel_util_set_aio_fd_handler(int read_fd,
  42                                          AioContext *read_ctx,
  43                                          IOHandler *io_read,
  44                                          int write_fd,
  45                                          AioContext *write_ctx,
  46                                          IOHandler *io_write,
  47                                          void *opaque)
  48 {
  49     if (read_fd == write_fd && read_ctx == write_ctx) {
  50         aio_set_fd_handler(read_ctx, read_fd, io_read, io_write,
  51                 NULL, NULL, opaque);
  52     } else {
  53         if (read_ctx) {
  54             aio_set_fd_handler(read_ctx, read_fd, io_read, NULL,
  55                     NULL, NULL, opaque);
  56         }
  57         if (write_ctx) {
  58             aio_set_fd_handler(write_ctx, write_fd, NULL, io_write,
  59                     NULL, NULL, opaque);
  60         }
  61     }
  62 }