Import Upstream version 2.72.4
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321
tests/mapping-test.c
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321
tests/mapping-test.c
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/* GLIB - Library of useful routines for C programming
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* Copyright (C) 2005 Matthias Clasen
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <signal.h>
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#include "glib.h"
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#include "gstdio.h"
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#ifdef G_OS_UNIX
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#include <unistd.h>
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#endif
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#ifdef G_OS_WIN32
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#include <process.h>
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#endif
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static gchar *dir, *global_filename, *global_displayname, *childname;
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static gboolean stop = FALSE;
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static gint parent_pid;
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#ifndef G_OS_WIN32
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static void
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handle_usr1 (int signum)
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{
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stop = TRUE;
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}
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#endif
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static gboolean
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check_stop (gpointer data)
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{
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GMainLoop *loop = data;
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#ifdef G_OS_WIN32
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stop = g_file_test ("STOP", G_FILE_TEST_EXISTS);
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#endif
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if (stop)
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g_main_loop_quit (loop);
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return TRUE;
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}
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static void
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write_or_die (const gchar *filename,
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const gchar *contents,
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gssize length)
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{
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GError *error = NULL;
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gchar *displayname;
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if (!g_file_set_contents (filename, contents, length, &error))
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{
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displayname = g_filename_display_name (childname);
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g_print ("failed to write '%s': %s\n",
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displayname, error->message);
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exit (1);
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}
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}
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static GMappedFile *
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map_or_die (const gchar *filename,
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gboolean writable)
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{
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GError *error = NULL;
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GMappedFile *map;
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gchar *displayname;
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map = g_mapped_file_new (filename, writable, &error);
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if (!map)
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{
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displayname = g_filename_display_name (childname);
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g_print ("failed to map '%s' non-writable, shared: %s\n",
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displayname, error->message);
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exit (1);
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}
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return map;
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}
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static gboolean
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signal_parent (gpointer data)
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{
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#ifndef G_OS_WIN32
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kill (parent_pid, SIGUSR1);
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#endif
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return G_SOURCE_REMOVE;
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}
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static int
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child_main (int argc, char *argv[])
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{
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GMappedFile *map;
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GMainLoop *loop;
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parent_pid = atoi (argv[2]);
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map = map_or_die (global_filename, FALSE);
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#ifndef G_OS_WIN32
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signal (SIGUSR1, handle_usr1);
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#endif
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loop = g_main_loop_new (NULL, FALSE);
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g_idle_add (check_stop, loop);
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g_idle_add (signal_parent, NULL);
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g_main_loop_run (loop);
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g_message ("test_child_private: received parent signal");
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write_or_die (childname,
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g_mapped_file_get_contents (map),
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g_mapped_file_get_length (map));
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signal_parent (NULL);
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return 0;
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}
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static void
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test_mapping (void)
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{
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GMappedFile *map;
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write_or_die (global_filename, "ABC", -1);
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map = map_or_die (global_filename, FALSE);
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g_assert (g_mapped_file_get_length (map) == 3);
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g_mapped_file_free (map);
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map = map_or_die (global_filename, TRUE);
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g_assert (g_mapped_file_get_length (map) == 3);
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g_mapped_file_free (map);
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g_message ("test_mapping: ok");
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}
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static void
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test_private (void)
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{
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GError *error = NULL;
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GMappedFile *map;
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gchar *buffer;
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gsize len;
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write_or_die (global_filename, "ABC", -1);
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map = map_or_die (global_filename, TRUE);
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buffer = (gchar *)g_mapped_file_get_contents (map);
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buffer[0] = '1';
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buffer[1] = '2';
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buffer[2] = '3';
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g_mapped_file_free (map);
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if (!g_file_get_contents (global_filename, &buffer, &len, &error))
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{
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g_print ("failed to read '%s': %s\n",
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global_displayname, error->message);
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exit (1);
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}
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g_assert (len == 3);
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g_assert (strcmp (buffer, "ABC") == 0);
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g_free (buffer);
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g_message ("test_private: ok");
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}
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static void
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test_child_private (gchar *argv0)
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{
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GError *error = NULL;
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GMappedFile *map;
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gchar *buffer;
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gsize len;
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gchar *child_argv[4];
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GPid child_pid;
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#ifndef G_OS_WIN32
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GMainLoop *loop;
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#endif
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gchar pid[100];
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#ifdef G_OS_WIN32
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g_remove ("STOP");
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g_assert (!g_file_test ("STOP", G_FILE_TEST_EXISTS));
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#endif
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write_or_die (global_filename, "ABC", -1);
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map = map_or_die (global_filename, TRUE);
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#ifndef G_OS_WIN32
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signal (SIGUSR1, handle_usr1);
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#endif
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g_snprintf (pid, sizeof(pid), "%d", getpid ());
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child_argv[0] = argv0;
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child_argv[1] = "mapchild";
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child_argv[2] = pid;
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child_argv[3] = NULL;
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if (!g_spawn_async (dir, child_argv, NULL,
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0, NULL, NULL, &child_pid, &error))
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{
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g_print ("failed to spawn child: %s\n",
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error->message);
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exit (1);
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}
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g_message ("test_child_private: child spawned");
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#ifndef G_OS_WIN32
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loop = g_main_loop_new (NULL, FALSE);
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g_idle_add (check_stop, loop);
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g_main_loop_run (loop);
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stop = FALSE;
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#else
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g_usleep (2000000);
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#endif
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g_message ("test_child_private: received first child signal");
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buffer = (gchar *)g_mapped_file_get_contents (map);
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buffer[0] = '1';
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buffer[1] = '2';
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buffer[2] = '3';
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g_mapped_file_free (map);
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#ifndef G_OS_WIN32
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kill (child_pid, SIGUSR1);
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#else
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g_file_set_contents ("STOP", "Hey there\n", -1, NULL);
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#endif
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#ifndef G_OS_WIN32
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g_idle_add (check_stop, loop);
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g_main_loop_run (loop);
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#else
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g_usleep (2000000);
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#endif
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g_message ("test_child_private: received second child signal");
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if (!g_file_get_contents (childname, &buffer, &len, &error))
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{
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gchar *name;
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name = g_filename_display_name (childname);
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g_print ("failed to read '%s': %s\n", name, error->message);
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exit (1);
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}
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g_assert (len == 3);
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g_assert (strcmp (buffer, "ABC") == 0);
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g_free (buffer);
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g_message ("test_child_private: ok");
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}
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static int
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parent_main (int argc,
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char *argv[])
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{
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/* test mapping with various flag combinations */
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test_mapping ();
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/* test private modification */
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test_private ();
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/* test multiple clients, non-shared */
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test_child_private (argv[0]);
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return 0;
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}
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int
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main (int argc,
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char *argv[])
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{
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int ret;
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#ifndef G_OS_WIN32
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sigset_t sig_mask, old_mask;
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sigemptyset (&sig_mask);
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sigaddset (&sig_mask, SIGUSR1);
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if (sigprocmask (SIG_UNBLOCK, &sig_mask, &old_mask) == 0)
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{
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if (sigismember (&old_mask, SIGUSR1))
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g_message ("SIGUSR1 was blocked, unblocking it");
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}
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#endif
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dir = g_get_current_dir ();
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global_filename = g_build_filename (dir, "maptest", NULL);
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global_displayname = g_filename_display_name (global_filename);
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childname = g_build_filename (dir, "mapchild", NULL);
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if (argc > 1)
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ret = child_main (argc, argv);
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else
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ret = parent_main (argc, argv);
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g_free (childname);
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g_free (global_filename);
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g_free (global_displayname);
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g_free (dir);
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return ret;
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}
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