gio/tests/pollable.c

   1 /* GLib testing framework examples and tests
   2  *
   3  * Copyright (C) 2010 Red Hat, Inc.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General
  16  * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <gio/gio.h>
  20 #include <glib/gstdio.h>
  21
  22 #ifdef G_OS_UNIX
  23 #include <fcntl.h>
  24 #include <gio/gunixinputstream.h>
  25 #include <gio/gunixoutputstream.h>
  26 #endif
  27
  28 GMainLoop *loop;
  29 GPollableInputStream *in;
  30 GOutputStream *out;
  31
  32 static gboolean
  33 poll_source_callback (GPollableInputStream *in,
  34                       gpointer              user_data)
  35 {
  36   GError *error = NULL;
  37   char buf[2];
  38   gssize nread;
  39   gboolean *success = user_data;
  40
  41   nread = g_pollable_input_stream_read_nonblocking (in, buf, 2, NULL, &error);
  42   g_assert_no_error (error);
  43   g_assert_cmpint (nread, ==, 2);
  44   g_assert_cmpstr (buf, ==, "x");
  45
  46   *success = TRUE;
  47   return G_SOURCE_REMOVE;
  48 }
  49
  50 static gboolean
  51 check_source_readability_callback (gpointer user_data)
  52 {
  53   gboolean expected = GPOINTER_TO_INT (user_data);
  54   gboolean readable;
  55
  56   readable = g_pollable_input_stream_is_readable (in);
  57   g_assert_cmpint (readable, ==, expected);
  58   return G_SOURCE_REMOVE;
  59 }
  60
  61 static gboolean
  62 write_callback (gpointer user_data)
  63 {
  64   char *buf = "x";
  65   gssize nwrote;
  66   GError *error = NULL;
  67
  68   nwrote = g_output_stream_write (out, buf, 2, NULL, &error);
  69   g_assert_no_error (error);
  70   g_assert_cmpint (nwrote, ==, 2);
  71 /* Give the pipe a few ticks to propagate the write for sockets. On my
  72  * iMac i7, 40 works, 30 doesn't. */
  73   g_usleep (80L);
  74
  75   check_source_readability_callback (GINT_TO_POINTER (TRUE));
  76
  77   return G_SOURCE_REMOVE;
  78 }
  79
  80 static gboolean
  81 check_source_and_quit_callback (gpointer user_data)
  82 {
  83   check_source_readability_callback (user_data);
  84   g_main_loop_quit (loop);
  85   return G_SOURCE_REMOVE;
  86 }
  87
  88 static void
  89 test_streams (void)
  90 {
  91   gboolean readable;
  92   GError *error = NULL;
  93   char buf[1];
  94   gssize nread;
  95   GSource *poll_source;
  96   gboolean success = FALSE;
  97
  98   g_assert (g_pollable_input_stream_can_poll (in));
  99   g_assert (g_pollable_output_stream_can_poll (G_POLLABLE_OUTPUT_STREAM (out)));
 100
 101   readable = g_pollable_input_stream_is_readable (in);
 102   g_assert (!readable);
 103
 104   nread = g_pollable_input_stream_read_nonblocking (in, buf, 1, NULL, &error);
 105   g_assert_cmpint (nread, ==, -1);
 106   g_assert_error (error, G_IO_ERROR, G_IO_ERROR_WOULD_BLOCK);
 107   g_clear_error (&error);
 108
 109   /* Create 4 sources, in decreasing order of priority:
 110    *   1. poll source on @in
 111    *   2. idle source that checks if @in is readable once
 112    *      (it won't be) and then removes itself
 113    *   3. idle source that writes a byte to @out, checks that
 114    *      @in is now readable, and removes itself
 115    *   4. idle source that checks if @in is readable once
 116    *      (it won't be, since the poll source will fire before
 117    *      this one does) and then quits the loop.
 118    *
 119    * If the poll source triggers before it should, then it will get a
 120    * %G_IO_ERROR_WOULD_BLOCK, and if check() fails in either
 121    * direction, we will catch it at some point.
 122    */
 123
 124   poll_source = g_pollable_input_stream_create_source (in, NULL);
 125   g_source_set_priority (poll_source, 1);
 126   g_source_set_callback (poll_source, (GSourceFunc) poll_source_callback, &success, NULL);
 127   g_source_attach (poll_source, NULL);
 128   g_source_unref (poll_source);
 129
 130   g_idle_add_full (2, check_source_readability_callback, GINT_TO_POINTER (FALSE), NULL);
 131   g_idle_add_full (3, write_callback, NULL, NULL);
 132   g_idle_add_full (4, check_source_and_quit_callback, GINT_TO_POINTER (FALSE), NULL);
 133
 134   loop = g_main_loop_new (NULL, FALSE);
 135   g_main_loop_run (loop);
 136   g_main_loop_unref (loop);
 137
 138   g_assert_cmpint (success, ==, TRUE);
 139 }
 140
 141 #ifdef G_OS_UNIX
 142 static void
 143 test_pollable_unix (void)
 144 {
 145   int pipefds[2], status, fd;
 146
 147   status = pipe (pipefds);
 148   g_assert_cmpint (status, ==, 0);
 149
 150   in = G_POLLABLE_INPUT_STREAM (g_unix_input_stream_new (pipefds[0], TRUE));
 151   out = g_unix_output_stream_new (pipefds[1], TRUE);
 152
 153   test_streams ();
 154
 155   g_object_unref (in);
 156   g_object_unref (out);
 157
 158   /* Non-pipe/socket unix streams are not pollable */
 159   fd = g_open ("/dev/null", O_RDWR, 0);
 160   g_assert_cmpint (fd, !=, -1);
 161   in = G_POLLABLE_INPUT_STREAM (g_unix_input_stream_new (fd, FALSE));
 162   out = g_unix_output_stream_new (fd, FALSE);
 163
 164   g_assert (!g_pollable_input_stream_can_poll (in));
 165   g_assert (!g_pollable_output_stream_can_poll (G_POLLABLE_OUTPUT_STREAM (out)));
 166
 167   g_object_unref (in);
 168   g_object_unref (out);
 169   close (fd);
 170 }
 171
 172 static void
 173 test_pollable_converter (void)
 174 {
 175   GConverter *converter;
 176   GError *error = NULL;
 177   GInputStream *ibase;
 178   int pipefds[2], status;
 179
 180   status = pipe (pipefds);
 181   g_assert_cmpint (status, ==, 0);
 182
 183   ibase = G_INPUT_STREAM (g_unix_input_stream_new (pipefds[0], TRUE));
 184   converter = G_CONVERTER (g_charset_converter_new ("UTF-8", "UTF-8", &error));
 185   g_assert_no_error (error);
 186
 187   in = G_POLLABLE_INPUT_STREAM (g_converter_input_stream_new (ibase, converter));
 188   g_object_unref (converter);
 189   g_object_unref (ibase);
 190
 191   out = g_unix_output_stream_new (pipefds[1], TRUE);
 192
 193   test_streams ();
 194
 195   g_object_unref (in);
 196   g_object_unref (out);
 197 }
 198
 199 #endif
 200
 201 static void
 202 client_connected (GObject      *source,
 203                   GAsyncResult *result,
 204                   gpointer      user_data)
 205 {
 206   GSocketClient *client = G_SOCKET_CLIENT (source);
 207   GSocketConnection **conn = user_data;
 208   GError *error = NULL;
 209
 210   *conn = g_socket_client_connect_finish (client, result, &error);
 211   g_assert_no_error (error);
 212 }
 213
 214 static void
 215 server_connected (GObject      *source,
 216                   GAsyncResult *result,
 217                   gpointer      user_data)
 218 {
 219   GSocketListener *listener = G_SOCKET_LISTENER (source);
 220   GSocketConnection **conn = user_data;
 221   GError *error = NULL;
 222
 223   *conn = g_socket_listener_accept_finish (listener, result, NULL, &error);
 224   g_assert_no_error (error);
 225 }
 226
 227 static void
 228 test_pollable_socket (void)
 229 {
 230   GInetAddress *iaddr;
 231   GSocketAddress *saddr, *effective_address;
 232   GSocketListener *listener;
 233   GSocketClient *client;
 234   GError *error = NULL;
 235   GSocketConnection *client_conn = NULL, *server_conn = NULL;
 236
 237   iaddr = g_inet_address_new_loopback (G_SOCKET_FAMILY_IPV4);
 238   saddr = g_inet_socket_address_new (iaddr, 0);
 239   g_object_unref (iaddr);
 240
 241   listener = g_socket_listener_new ();
 242   g_socket_listener_add_address (listener, saddr,
 243                                  G_SOCKET_TYPE_STREAM,
 244                                  G_SOCKET_PROTOCOL_TCP,
 245                                  NULL,
 246                                  &effective_address,
 247                                  &error);
 248   g_assert_no_error (error);
 249   g_object_unref (saddr);
 250
 251   client = g_socket_client_new ();
 252
 253   g_socket_client_connect_async (client,
 254                                  G_SOCKET_CONNECTABLE (effective_address),
 255                                  NULL, client_connected, &client_conn);
 256   g_socket_listener_accept_async (listener, NULL,
 257                                   server_connected, &server_conn);
 258
 259   while (!client_conn || !server_conn)
 260     g_main_context_iteration (NULL, TRUE);
 261
 262   in = G_POLLABLE_INPUT_STREAM (g_io_stream_get_input_stream (G_IO_STREAM (client_conn)));
 263   out = g_io_stream_get_output_stream (G_IO_STREAM (server_conn));
 264
 265   test_streams ();
 266
 267   g_object_unref (client_conn);
 268   g_object_unref (server_conn);
 269   g_object_unref (client);
 270   g_object_unref (listener);
 271   g_object_unref (effective_address);
 272 }
 273
 274 int
 275 main (int   argc,
 276       char *argv[])
 277 {
 278   g_test_init (&argc, &argv, NULL);
 279
 280 #ifdef G_OS_UNIX
 281   g_test_add_func ("/pollable/unix", test_pollable_unix);
 282   g_test_add_func ("/pollable/converter", test_pollable_converter);
 283 #endif
 284   g_test_add_func ("/pollable/socket", test_pollable_socket);
 285
 286   return g_test_run();
 287 }
 288