nexmon – Rev 1
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/* GLIB - Library of useful routines for C programming
* Copyright (C) 2000 Tor Lillqvist
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
/* A test program for the main loop and IO channel code.
* Just run it. Optional parameter is number of sub-processes.
*/
#undef G_DISABLE_ASSERT
#undef G_LOG_DOMAIN
#include "config.h"
#include <glib.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <time.h>
#ifdef G_OS_WIN32
#include <io.h>
#include <fcntl.h>
#include <process.h>
#define STRICT
#include <windows.h>
#define pipe(fds) _pipe(fds, 4096, _O_BINARY)
#endif
#ifdef G_OS_UNIX
#include <unistd.h>
#endif
static int nrunning;
static GMainLoop *main_loop;
#define BUFSIZE 5000 /* Larger than the circular buffer in
* giowin32.c on purpose.
*/
static int nkiddies;
static struct {
int fd;
int seq;
} *seqtab;
static GIOError
read_all (int fd,
GIOChannel *channel,
char *buffer,
guint nbytes,
guint *bytes_read)
{
guint left = nbytes;
gsize nb;
GIOError error = G_IO_ERROR_NONE;
char *bufp = buffer;
/* g_io_channel_read() doesn't necessarily return all the
* data we want at once.
*/
*bytes_read = 0;
while (left)
{
error = g_io_channel_read (channel, bufp, left, &nb);
if (error != G_IO_ERROR_NONE)
{
g_print ("gio-test: ...from %d: %d\n", fd, error);
if (error == G_IO_ERROR_AGAIN)
continue;
break;
}
if (nb == 0)
return error;
left -= nb;
bufp += nb;
*bytes_read += nb;
}
return error;
}
static void
shutdown_source (gpointer data)
{
if (g_source_remove (*(guint *) data))
{
nrunning--;
if (nrunning == 0)
g_main_loop_quit (main_loop);
}
}
static gboolean
recv_message (GIOChannel *channel,
GIOCondition cond,
gpointer data)
{
gint fd = g_io_channel_unix_get_fd (channel);
gboolean retval = TRUE;
#ifdef VERBOSE
g_print ("gio-test: ...from %d:%s%s%s%s\n", fd,
(cond & G_IO_ERR) ? " ERR" : "",
(cond & G_IO_HUP) ? " HUP" : "",
(cond & G_IO_IN) ? " IN" : "",
(cond & G_IO_PRI) ? " PRI" : "");
#endif
if (cond & (G_IO_ERR | G_IO_HUP))
{
shutdown_source (data);
retval = FALSE;
}
if (cond & G_IO_IN)
{
char buf[BUFSIZE];
guint nbytes;
guint nb;
int i, j, seq;
GIOError error;
error = read_all (fd, channel, (gchar *) &seq, sizeof (seq), &nb);
if (error == G_IO_ERROR_NONE)
{
if (nb == 0)
{
#ifdef VERBOSE
g_print ("gio-test: ...from %d: EOF\n", fd);
#endif
shutdown_source (data);
return FALSE;
}
g_assert (nb == sizeof (nbytes));
for (i = 0; i < nkiddies; i++)
if (seqtab[i].fd == fd)
{
g_assert_cmpint (seq, ==, seqtab[i].seq);
seqtab[i].seq++;
break;
}
error = read_all (fd, channel, (gchar *) &nbytes, sizeof (nbytes), &nb);
}
if (error != G_IO_ERROR_NONE)
return FALSE;
if (nb == 0)
{
#ifdef VERBOSE
g_print ("gio-test: ...from %d: EOF\n", fd);
#endif
shutdown_source (data);
return FALSE;
}
g_assert (nb == sizeof (nbytes));
g_assert_cmpint (nbytes, <, BUFSIZE);
g_assert (nbytes >= 0 && nbytes < BUFSIZE);
#ifdef VERBOSE
g_print ("gio-test: ...from %d: %d bytes\n", fd, nbytes);
#endif
if (nbytes > 0)
{
error = read_all (fd, channel, buf, nbytes, &nb);
if (error != G_IO_ERROR_NONE)
return FALSE;
if (nb == 0)
{
#ifdef VERBOSE
g_print ("gio-test: ...from %d: EOF\n", fd);
#endif
shutdown_source (data);
return FALSE;
}
for (j = 0; j < nbytes; j++)
g_assert (buf[j] == ' ' + ((nbytes + j) % 95));
#ifdef VERBOSE
g_print ("gio-test: ...from %d: OK\n", fd);
#endif
}
}
return retval;
}
#ifdef G_OS_WIN32
static gboolean
recv_windows_message (GIOChannel *channel,
GIOCondition cond,
gpointer data)
{
GIOError error;
MSG msg;
guint nb;
while (1)
{
error = g_io_channel_read (channel, &msg, sizeof (MSG), &nb);
if (error != G_IO_ERROR_NONE)
{
g_print ("gio-test: ...reading Windows message: G_IO_ERROR_%s\n",
(error == G_IO_ERROR_AGAIN ? "AGAIN" :
(error == G_IO_ERROR_INVAL ? "INVAL" :
(error == G_IO_ERROR_UNKNOWN ? "UNKNOWN" : "???"))));
if (error == G_IO_ERROR_AGAIN)
continue;
}
break;
}
g_print ("gio-test: ...Windows message for %#x: %d,%d,%d\n",
msg.hwnd, msg.message, msg.wParam, msg.lParam);
return TRUE;
}
LRESULT CALLBACK
window_procedure (HWND hwnd,
UINT message,
WPARAM wparam,
LPARAM lparam)
{
g_print ("gio-test: window_procedure for %#x: %d,%d,%d\n",
hwnd, message, wparam, lparam);
return DefWindowProc (hwnd, message, wparam, lparam);
}
#endif
int
main (int argc,
char **argv)
{
if (argc < 3)
{
/* Parent */
GIOChannel *my_read_channel;
gchar *cmdline;
guint *id;
int i;
#ifdef G_OS_WIN32
GTimeVal start, end;
GPollFD pollfd;
int pollresult;
ATOM klass;
static WNDCLASS wcl;
HWND hwnd;
GIOChannel *windows_messages_channel;
#endif
nkiddies = (argc == 1 ? 1 : atoi(argv[1]));
seqtab = g_malloc (nkiddies * 2 * sizeof (int));
#ifdef G_OS_WIN32
wcl.style = 0;
wcl.lpfnWndProc = window_procedure;
wcl.cbClsExtra = 0;
wcl.cbWndExtra = 0;
wcl.hInstance = GetModuleHandle (NULL);
wcl.hIcon = NULL;
wcl.hCursor = NULL;
wcl.hbrBackground = NULL;
wcl.lpszMenuName = NULL;
wcl.lpszClassName = "gio-test";
klass = RegisterClass (&wcl);
if (!klass)
{
g_print ("gio-test: RegisterClass failed\n");
exit (1);
}
hwnd = CreateWindow (MAKEINTATOM(klass), "gio-test", 0, 0, 0, 10, 10,
NULL, NULL, wcl.hInstance, NULL);
if (!hwnd)
{
g_print ("gio-test: CreateWindow failed\n");
exit (1);
}
windows_messages_channel = g_io_channel_win32_new_messages ((guint)hwnd);
g_io_add_watch (windows_messages_channel, G_IO_IN, recv_windows_message, 0);
#endif
for (i = 0; i < nkiddies; i++)
{
int pipe_to_sub[2], pipe_from_sub[2];
if (pipe (pipe_to_sub) == -1 ||
pipe (pipe_from_sub) == -1)
perror ("pipe"), exit (1);
seqtab[i].fd = pipe_from_sub[0];
seqtab[i].seq = 0;
my_read_channel = g_io_channel_unix_new (pipe_from_sub[0]);
id = g_new (guint, 1);
*id =
g_io_add_watch (my_read_channel,
G_IO_IN | G_IO_PRI | G_IO_ERR | G_IO_HUP,
recv_message,
id);
nrunning++;
#ifdef G_OS_WIN32
cmdline = g_strdup_printf ("%d:%d:%d",
pipe_to_sub[0],
pipe_from_sub[1],
hwnd);
_spawnl (_P_NOWAIT, argv[0], argv[0], "--child", cmdline, NULL);
#else
cmdline = g_strdup_printf ("%s --child %d:%d &", argv[0],
pipe_to_sub[0], pipe_from_sub[1]);
system (cmdline);
g_free (cmdline);
#endif
close (pipe_to_sub[0]);
close (pipe_from_sub [1]);
#ifdef G_OS_WIN32
g_get_current_time (&start);
g_io_channel_win32_make_pollfd (my_read_channel, G_IO_IN, &pollfd);
pollresult = g_io_channel_win32_poll (&pollfd, 1, 100);
g_get_current_time (&end);
if (end.tv_usec < start.tv_usec)
end.tv_sec--, end.tv_usec += 1000000;
g_print ("gio-test: had to wait %ld.%03ld s, result:%d\n",
end.tv_sec - start.tv_sec,
(end.tv_usec - start.tv_usec) / 1000,
pollresult);
#endif
g_io_channel_unref (my_read_channel);
}
main_loop = g_main_loop_new (NULL, FALSE);
g_main_loop_run (main_loop);
g_main_loop_unref (main_loop);
g_free (seqtab);
g_free (id);
}
else if (argc == 3)
{
/* Child */
int readfd, writefd;
#ifdef G_OS_WIN32
HWND hwnd;
#endif
int i, j;
char buf[BUFSIZE];
int buflen;
GTimeVal tv;
int n;
g_get_current_time (&tv);
sscanf (argv[2], "%d:%d%n", &readfd, &writefd, &n);
#ifdef G_OS_WIN32
sscanf (argv[2] + n, ":%d", &hwnd);
#endif
srand (tv.tv_sec ^ (tv.tv_usec / 1000) ^ readfd ^ (writefd << 4));
for (i = 0; i < 20 + rand() % 20; i++)
{
g_usleep (100 + (rand() % 10) * 5000);
buflen = rand() % BUFSIZE;
for (j = 0; j < buflen; j++)
buf[j] = ' ' + ((buflen + j) % 95);
#ifdef VERBOSE
g_print ("gio-test: child writing %d+%d bytes to %d\n",
(int)(sizeof(i) + sizeof(buflen)), buflen, writefd);
#endif
write (writefd, &i, sizeof (i));
write (writefd, &buflen, sizeof (buflen));
write (writefd, buf, buflen);
#ifdef G_OS_WIN32
if (rand() % 100 < 5)
{
int msg = WM_USER + (rand() % 100);
WPARAM wparam = rand ();
LPARAM lparam = rand ();
g_print ("gio-test: child posting message %d,%d,%d to %#x\n",
msg, wparam, lparam, hwnd);
PostMessage (hwnd, msg, wparam, lparam);
}
#endif
}
#ifdef VERBOSE
g_print ("gio-test: child exiting, closing %d\n", writefd);
#endif
close (writefd);
}
else
g_print ("Huh?\n");
return 0;
}