glib/tests/spawn-multithreaded.c

   1 /*
   2  * Copyright (C) 2011 Red Hat, Inc.
   3  *
   4  * This work is provided "as is"; redistribution and modification
   5  * in whole or in part, in any medium, physical or electronic is
   6  * permitted without restriction.
   7  *
   8  * This work is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  11  *
  12  * In no event shall the authors or contributors be liable for any
  13  * direct, indirect, incidental, special, exemplary, or consequential
  14  * damages (including, but not limited to, procurement of substitute
  15  * goods or services; loss of use, data, or profits; or business
  16  * interruption) however caused and on any theory of liability, whether
  17  * in contract, strict liability, or tort (including negligence or
  18  * otherwise) arising in any way out of the use of this software, even
  19  * if advised of the possibility of such damage.
  20  *
  21  * Author: Colin Walters <walters@verbum.org>
  22  */
  23
  24 #include "config.h"
  25
  26 #include <glib.h>
  27 #include <string.h>
  28
  29 static char *echo_prog_path;
  30
  31 static void
  32 multithreaded_test_run (GThreadFunc function)
  33 {
  34   int i;
  35   GPtrArray *threads = g_ptr_array_new ();
  36   guint n_threads;
  37
  38   /* Limit to 64, otherwise we may hit file descriptor limits and such */
  39   n_threads = MIN (g_get_num_processors () * 2, 64);
  40
  41   for (i = 0; i < n_threads; i++)
  42     {
  43       GThread *thread;
  44
  45       thread = g_thread_new ("test", function, GINT_TO_POINTER (i));
  46       g_ptr_array_add (threads, thread);
  47     }
  48
  49   for (i = 0; i < n_threads; i++)
  50     {
  51       gpointer ret;
  52       ret = g_thread_join (g_ptr_array_index (threads, i));
  53       g_assert_cmpint (GPOINTER_TO_INT (ret), ==, i);
  54     }
  55   g_ptr_array_free (threads, TRUE);
  56 }
  57
  58 static gpointer
  59 test_spawn_sync_multithreaded_instance (gpointer data)
  60 {
  61   int tnum = GPOINTER_TO_INT (data);
  62   GError *error = NULL;
  63   GPtrArray *argv;
  64   char *arg;
  65   char *stdout_str;
  66   int estatus;
  67
  68   arg = g_strdup_printf ("thread %d", tnum);
  69
  70   argv = g_ptr_array_new ();
  71   g_ptr_array_add (argv, echo_prog_path);
  72   g_ptr_array_add (argv, arg);
  73   g_ptr_array_add (argv, NULL);
  74
  75   g_spawn_sync (NULL, (char**)argv->pdata, NULL, G_SPAWN_DEFAULT, NULL, NULL, &stdout_str, NULL, &estatus, &error);
  76   g_assert_no_error (error);
  77   g_assert_cmpstr (arg, ==, stdout_str);
  78   g_free (arg);
  79   g_free (stdout_str);
  80   g_ptr_array_free (argv, TRUE);
  81
  82   return GINT_TO_POINTER (tnum);
  83 }
  84
  85 static void
  86 test_spawn_sync_multithreaded (void)
  87 {
  88   multithreaded_test_run (test_spawn_sync_multithreaded_instance);
  89 }
  90
  91 typedef struct {
  92   GMainLoop *loop;
  93   gboolean child_exited;
  94   gboolean stdout_done;
  95   GString *stdout_buf;
  96 } SpawnAsyncMultithreadedData;
  97
  98 static gboolean
  99 on_child_exited (GPid     pid,
 100                  gint     status,
 101                  gpointer datap)
 102 {
 103   SpawnAsyncMultithreadedData *data = datap;
 104
 105   data->child_exited = TRUE;
 106   if (data->child_exited && data->stdout_done)
 107     g_main_loop_quit (data->loop);
 108
 109   return G_SOURCE_REMOVE;
 110 }
 111
 112 static gboolean
 113 on_child_stdout (GIOChannel   *channel,
 114                  GIOCondition  condition,
 115                  gpointer      datap)
 116 {
 117   char buf[1024];
 118   GError *error = NULL;
 119   gsize bytes_read;
 120   GIOStatus status;
 121   SpawnAsyncMultithreadedData *data = datap;
 122
 123  read:
 124   status = g_io_channel_read_chars (channel, buf, sizeof (buf), &bytes_read, &error);
 125   if (status == G_IO_STATUS_NORMAL)
 126     {
 127       g_string_append_len (data->stdout_buf, buf, (gssize) bytes_read);
 128       if (bytes_read == sizeof (buf))
 129         goto read;
 130     }
 131   else if (status == G_IO_STATUS_EOF)
 132     {
 133       g_string_append_len (data->stdout_buf, buf, (gssize) bytes_read);
 134       data->stdout_done = TRUE;
 135     }
 136   else if (status == G_IO_STATUS_ERROR)
 137     {
 138       g_error ("Error reading from child stdin: %s", error->message);
 139     }
 140
 141   if (data->child_exited && data->stdout_done)
 142     g_main_loop_quit (data->loop);
 143
 144   return !data->stdout_done;
 145 }
 146
 147 static gpointer
 148 test_spawn_async_multithreaded_instance (gpointer thread_data)
 149 {
 150   int tnum = GPOINTER_TO_INT (thread_data);
 151   GError *error = NULL;
 152   GPtrArray *argv;
 153   char *arg;
 154   GPid pid;
 155   GMainContext *context;
 156   GMainLoop *loop;
 157   GIOChannel *channel;
 158   GSource *source;
 159   int child_stdout_fd;
 160   SpawnAsyncMultithreadedData data;
 161
 162   context = g_main_context_new ();
 163   loop = g_main_loop_new (context, TRUE);
 164
 165   arg = g_strdup_printf ("thread %d", tnum);
 166
 167   argv = g_ptr_array_new ();
 168   g_ptr_array_add (argv, echo_prog_path);
 169   g_ptr_array_add (argv, arg);
 170   g_ptr_array_add (argv, NULL);
 171
 172   g_spawn_async_with_pipes (NULL, (char**)argv->pdata, NULL, G_SPAWN_DO_NOT_REAP_CHILD, NULL, NULL, &pid, NULL,
 173                             &child_stdout_fd, NULL, &error);
 174   g_assert_no_error (error);
 175   g_ptr_array_free (argv, TRUE);
 176
 177   data.loop = loop;
 178   data.stdout_done = FALSE;
 179   data.child_exited = FALSE;
 180   data.stdout_buf = g_string_new (0);
 181
 182   source = g_child_watch_source_new (pid);
 183   g_source_set_callback (source, (GSourceFunc)on_child_exited, &data, NULL);
 184   g_source_attach (source, context);
 185   g_source_unref (source);
 186
 187   channel = g_io_channel_unix_new (child_stdout_fd);
 188   source = g_io_create_watch (channel, G_IO_IN | G_IO_HUP);
 189   g_source_set_callback (source, (GSourceFunc)on_child_stdout, &data, NULL);
 190   g_source_attach (source, context);
 191   g_source_unref (source);
 192
 193   g_main_loop_run (loop);
 194
 195   g_assert (data.child_exited);
 196   g_assert (data.stdout_done);
 197   g_assert_cmpstr (data.stdout_buf->str, ==, arg);
 198   g_string_free (data.stdout_buf, TRUE);
 199
 200   g_io_channel_unref (channel);
 201   g_main_context_unref (context);
 202   g_main_loop_unref (loop);
 203
 204   g_free (arg);
 205
 206   return GINT_TO_POINTER (tnum);
 207 }
 208
 209 static void
 210 test_spawn_async_multithreaded (void)
 211 {
 212   multithreaded_test_run (test_spawn_async_multithreaded_instance);
 213 }
 214
 215 int
 216 main (int   argc,
 217       char *argv[])
 218 {
 219   char *dirname;
 220   int ret;
 221
 222   g_test_init (&argc, &argv, NULL);
 223
 224   dirname = g_path_get_dirname (argv[0]);
 225   echo_prog_path = g_build_filename (dirname, "test-spawn-echo" EXEEXT, NULL);
 226   if (!g_file_test (echo_prog_path, G_FILE_TEST_EXISTS))
 227     {
 228       g_free (echo_prog_path);
 229       echo_prog_path = g_build_filename (dirname, "lt-test-spawn-echo" EXEEXT, NULL);
 230     }
 231   g_free (dirname);
 232
 233   g_assert (g_file_test (echo_prog_path, G_FILE_TEST_EXISTS));
 234
 235   g_test_add_func ("/gthread/spawn-sync", test_spawn_sync_multithreaded);
 236   g_test_add_func ("/gthread/spawn-async", test_spawn_async_multithreaded);
 237
 238   ret = g_test_run();
 239
 240   g_free (echo_prog_path);
 241
 242   return ret;
 243 }