tests/gio-test.c

   1 /* GLIB - Library of useful routines for C programming
   2  * Copyright (C) 2000  Tor Lillqvist
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 /* A test program for the main loop and IO channel code.
  21  * Just run it. Optional parameter is number of sub-processes.
  22  */
  23
  24 #undef G_DISABLE_ASSERT
  25 #undef G_LOG_DOMAIN
  26
  27 #include "config.h"
  28
  29 #include <glib.h>
  30
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33 #include <math.h>
  34 #include <time.h>
  35
  36 #ifdef G_OS_WIN32
  37   #include <io.h>
  38   #include <fcntl.h>
  39   #include <process.h>
  40   #define STRICT
  41   #include <windows.h>
  42   #define pipe(fds) _pipe(fds, 4096, _O_BINARY)
  43 #else
  44   #ifdef HAVE_UNISTD_H
  45     #include <unistd.h>
  46   #endif
  47 #endif
  48
  49 static int nrunning;
  50 static GMainLoop *main_loop;
  51
  52 #define BUFSIZE 5000            /* Larger than the circular buffer in
  53                                  * giowin32.c on purpose.
  54                                  */
  55
  56 static int nkiddies;
  57
  58 static struct {
  59   int fd;
  60   int seq;
  61 } *seqtab;
  62
  63 static GIOError
  64 read_all (int         fd,
  65           GIOChannel *channel,
  66           char       *buffer,
  67           guint       nbytes,
  68           guint      *bytes_read)
  69 {
  70   guint left = nbytes;
  71   gsize nb;
  72   GIOError error = G_IO_ERROR_NONE;
  73   char *bufp = buffer;
  74
  75   /* g_io_channel_read() doesn't necessarily return all the
  76    * data we want at once.
  77    */
  78   *bytes_read = 0;
  79   while (left)
  80     {
  81       error = g_io_channel_read (channel, bufp, left, &nb);
  82
  83       if (error != G_IO_ERROR_NONE)
  84         {
  85           g_print ("gio-test: ...from %d: %d\n", fd, error);
  86           if (error == G_IO_ERROR_AGAIN)
  87             continue;
  88           break;
  89         }
  90       if (nb == 0)
  91         return error;
  92       left -= nb;
  93       bufp += nb;
  94       *bytes_read += nb;
  95     }
  96   return error;
  97 }
  98
  99 static void
 100 shutdown_source (gpointer data)
 101 {
 102   if (g_source_remove (*(guint *) data))
 103     {
 104       nrunning--;
 105       if (nrunning == 0)
 106         g_main_loop_quit (main_loop);
 107     }
 108 }
 109
 110 static gboolean
 111 recv_message (GIOChannel  *channel,
 112               GIOCondition cond,
 113               gpointer    data)
 114 {
 115   gint fd = g_io_channel_unix_get_fd (channel);
 116   gboolean retval = TRUE;
 117
 118 #ifdef VERBOSE
 119   g_print ("gio-test: ...from %d:%s%s%s%s\n", fd,
 120            (cond & G_IO_ERR) ? " ERR" : "",
 121            (cond & G_IO_HUP) ? " HUP" : "",
 122            (cond & G_IO_IN)  ? " IN"  : "",
 123            (cond & G_IO_PRI) ? " PRI" : "");
 124 #endif
 125
 126   if (cond & (G_IO_ERR | G_IO_HUP))
 127     {
 128       shutdown_source (data);
 129       retval = FALSE;
 130     }
 131
 132   if (cond & G_IO_IN)
 133     {
 134       char buf[BUFSIZE];
 135       guint nbytes;
 136       guint nb;
 137       int i, j, seq;
 138       GIOError error;
 139
 140       error = read_all (fd, channel, (gchar *) &seq, sizeof (seq), &nb);
 141       if (error == G_IO_ERROR_NONE)
 142         {
 143           if (nb == 0)
 144             {
 145 #ifdef VERBOSE
 146               g_print ("gio-test: ...from %d: EOF\n", fd);
 147 #endif
 148               shutdown_source (data);
 149               return FALSE;
 150             }
 151
 152           g_assert (nb == sizeof (nbytes));
 153
 154           for (i = 0; i < nkiddies; i++)
 155             if (seqtab[i].fd == fd)
 156               {
 157                 g_assert_cmpint (seq, ==, seqtab[i].seq);
 158                 seqtab[i].seq++;
 159                 break;
 160               }
 161
 162           error = read_all (fd, channel, (gchar *) &nbytes, sizeof (nbytes), &nb);
 163         }
 164
 165       if (error != G_IO_ERROR_NONE)
 166         return FALSE;
 167
 168       if (nb == 0)
 169         {
 170 #ifdef VERBOSE
 171           g_print ("gio-test: ...from %d: EOF\n", fd);
 172 #endif
 173           shutdown_source (data);
 174           return FALSE;
 175         }
 176
 177       g_assert (nb == sizeof (nbytes));
 178
 179       g_assert_cmpint (nbytes, <, BUFSIZE);
 180       g_assert (nbytes >= 0 && nbytes < BUFSIZE);
 181 #ifdef VERBOSE
 182       g_print ("gio-test: ...from %d: %d bytes\n", fd, nbytes);
 183 #endif
 184       if (nbytes > 0)
 185         {
 186           error = read_all (fd, channel, buf, nbytes, &nb);
 187
 188           if (error != G_IO_ERROR_NONE)
 189             return FALSE;
 190
 191           if (nb == 0)
 192             {
 193 #ifdef VERBOSE
 194               g_print ("gio-test: ...from %d: EOF\n", fd);
 195 #endif
 196               shutdown_source (data);
 197               return FALSE;
 198             }
 199
 200           for (j = 0; j < nbytes; j++)
 201             g_assert (buf[j] == ' ' + ((nbytes + j) % 95));
 202 #ifdef VERBOSE
 203           g_print ("gio-test: ...from %d: OK\n", fd);
 204 #endif
 205         }
 206     }
 207   return retval;
 208 }
 209
 210 #ifdef G_OS_WIN32
 211
 212 static gboolean
 213 recv_windows_message (GIOChannel  *channel,
 214                       GIOCondition cond,
 215                       gpointer    data)
 216 {
 217   GIOError error;
 218   MSG msg;
 219   guint nb;
 220
 221   while (1)
 222     {
 223       error = g_io_channel_read (channel, &msg, sizeof (MSG), &nb);
 224
 225       if (error != G_IO_ERROR_NONE)
 226         {
 227           g_print ("gio-test: ...reading Windows message: G_IO_ERROR_%s\n",
 228                    (error == G_IO_ERROR_AGAIN ? "AGAIN" :
 229                     (error == G_IO_ERROR_INVAL ? "INVAL" :
 230                      (error == G_IO_ERROR_UNKNOWN ? "UNKNOWN" : "???"))));
 231           if (error == G_IO_ERROR_AGAIN)
 232             continue;
 233         }
 234       break;
 235     }
 236
 237   g_print ("gio-test: ...Windows message for %#x: %d,%d,%d\n",
 238            msg.hwnd, msg.message, msg.wParam, msg.lParam);
 239
 240   return TRUE;
 241 }
 242
 243 LRESULT CALLBACK
 244 window_procedure (HWND hwnd,
 245                   UINT message,
 246                   WPARAM wparam,
 247                   LPARAM lparam)
 248 {
 249   g_print ("gio-test: window_procedure for %#x: %d,%d,%d\n",
 250            hwnd, message, wparam, lparam);
 251   return DefWindowProc (hwnd, message, wparam, lparam);
 252 }
 253
 254 #endif
 255
 256 int
 257 main (int    argc,
 258       char **argv)
 259 {
 260   if (argc < 3)
 261     {
 262       /* Parent */
 263
 264       GIOChannel *my_read_channel;
 265       gchar *cmdline;
 266       guint *id;
 267       int i;
 268 #ifdef G_OS_WIN32
 269       GTimeVal start, end;
 270       GPollFD pollfd;
 271       int pollresult;
 272       ATOM klass;
 273       static WNDCLASS wcl;
 274       HWND hwnd;
 275       GIOChannel *windows_messages_channel;
 276 #endif
 277
 278       nkiddies = (argc == 1 ? 1 : atoi(argv[1]));
 279       seqtab = g_malloc (nkiddies * 2 * sizeof (int));
 280
 281 #ifdef G_OS_WIN32
 282       wcl.style = 0;
 283       wcl.lpfnWndProc = window_procedure;
 284       wcl.cbClsExtra = 0;
 285       wcl.cbWndExtra = 0;
 286       wcl.hInstance = GetModuleHandle (NULL);
 287       wcl.hIcon = NULL;
 288       wcl.hCursor = NULL;
 289       wcl.hbrBackground = NULL;
 290       wcl.lpszMenuName = NULL;
 291       wcl.lpszClassName = "gio-test";
 292
 293       klass = RegisterClass (&wcl);
 294
 295       if (!klass)
 296         {
 297           g_print ("gio-test: RegisterClass failed\n");
 298           exit (1);
 299         }
 300
 301       hwnd = CreateWindow (MAKEINTATOM(klass), "gio-test", 0, 0, 0, 10, 10,
 302                            NULL, NULL, wcl.hInstance, NULL);
 303       if (!hwnd)
 304         {
 305           g_print ("gio-test: CreateWindow failed\n");
 306           exit (1);
 307         }
 308
 309       windows_messages_channel = g_io_channel_win32_new_messages ((guint)hwnd);
 310       g_io_add_watch (windows_messages_channel, G_IO_IN, recv_windows_message, 0);
 311 #endif
 312
 313       for (i = 0; i < nkiddies; i++)
 314         {
 315           int pipe_to_sub[2], pipe_from_sub[2];
 316
 317           if (pipe (pipe_to_sub) == -1 ||
 318               pipe (pipe_from_sub) == -1)
 319             perror ("pipe"), exit (1);
 320
 321           seqtab[i].fd = pipe_from_sub[0];
 322           seqtab[i].seq = 0;
 323
 324           my_read_channel = g_io_channel_unix_new (pipe_from_sub[0]);
 325
 326           id = g_new (guint, 1);
 327           *id =
 328             g_io_add_watch (my_read_channel,
 329                             G_IO_IN | G_IO_PRI | G_IO_ERR | G_IO_HUP,
 330                             recv_message,
 331                             id);
 332
 333           nrunning++;
 334
 335 #ifdef G_OS_WIN32
 336           cmdline = g_strdup_printf ("%d:%d:%d",
 337                                      pipe_to_sub[0],
 338                                      pipe_from_sub[1],
 339                                      hwnd);
 340           _spawnl (_P_NOWAIT, argv[0], argv[0], "--child", cmdline, NULL);
 341 #else
 342           cmdline = g_strdup_printf ("%s --child %d:%d &", argv[0],
 343                                      pipe_to_sub[0], pipe_from_sub[1]);
 344
 345           system (cmdline);
 346 #endif
 347           close (pipe_to_sub[0]);
 348           close (pipe_from_sub [1]);
 349
 350 #ifdef G_OS_WIN32
 351           g_get_current_time (&start);
 352           g_io_channel_win32_make_pollfd (my_read_channel, G_IO_IN, &pollfd);
 353           pollresult = g_io_channel_win32_poll (&pollfd, 1, 100);
 354           g_get_current_time (&end);
 355           if (end.tv_usec < start.tv_usec)
 356             end.tv_sec--, end.tv_usec += 1000000;
 357           g_print ("gio-test: had to wait %ld.%03ld s, result:%d\n",
 358                    end.tv_sec - start.tv_sec,
 359                    (end.tv_usec - start.tv_usec) / 1000,
 360                    pollresult);
 361 #endif
 362         }
 363
 364       main_loop = g_main_loop_new (NULL, FALSE);
 365
 366       g_main_loop_run (main_loop);
 367     }
 368   else if (argc == 3)
 369     {
 370       /* Child */
 371
 372       int readfd, writefd;
 373 #ifdef G_OS_WIN32
 374       HWND hwnd;
 375 #endif
 376       int i, j;
 377       char buf[BUFSIZE];
 378       int buflen;
 379       GTimeVal tv;
 380       int n;
 381
 382       g_get_current_time (&tv);
 383
 384       sscanf (argv[2], "%d:%d%n", &readfd, &writefd, &n);
 385
 386 #ifdef G_OS_WIN32
 387       sscanf (argv[2] + n, ":%d", &hwnd);
 388 #endif
 389
 390       srand (tv.tv_sec ^ (tv.tv_usec / 1000) ^ readfd ^ (writefd << 4));
 391
 392       for (i = 0; i < 20 + rand() % 20; i++)
 393         {
 394           g_usleep (100 + (rand() % 10) * 5000);
 395           buflen = rand() % BUFSIZE;
 396           for (j = 0; j < buflen; j++)
 397             buf[j] = ' ' + ((buflen + j) % 95);
 398 #ifdef VERBOSE
 399           g_print ("gio-test: child writing %d+%d bytes to %d\n",
 400                    (int)(sizeof(i) + sizeof(buflen)), buflen, writefd);
 401 #endif
 402           write (writefd, &i, sizeof (i));
 403           write (writefd, &buflen, sizeof (buflen));
 404           write (writefd, buf, buflen);
 405
 406 #ifdef G_OS_WIN32
 407           if (rand() % 100 < 5)
 408             {
 409               int msg = WM_USER + (rand() % 100);
 410               WPARAM wparam = rand ();
 411               LPARAM lparam = rand ();
 412               g_print ("gio-test: child posting message %d,%d,%d to %#x\n",
 413                        msg, wparam, lparam, hwnd);
 414               PostMessage (hwnd, msg, wparam, lparam);
 415             }
 416 #endif
 417         }
 418 #ifdef VERBOSE
 419       g_print ("gio-test: child exiting, closing %d\n", writefd);
 420 #endif
 421       close (writefd);
 422     }
 423   else
 424     g_print ("Huh?\n");
 425
 426   return 0;
 427 }
 428