nptl/tst-cond4.c

   1 /* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
   4
   5    The GNU C 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 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C 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 Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <errno.h>
  21 #include <pthread.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <unistd.h>
  26 #include <sys/mman.h>
  27 #include <sys/wait.h>
  28
  29
  30 int *condition;
  31
  32 static int
  33 do_test (void)
  34 {
  35 #if ! _POSIX_THREAD_PROCESS_SHARED
  36
  37   puts ("_POSIX_THREAD_PROCESS_SHARED not supported, test skipped");
  38   return 0;
  39
  40 #else
  41
  42   size_t ps = sysconf (_SC_PAGESIZE);
  43   char tmpfname[] = "/tmp/tst-cond4.XXXXXX";
  44   char data[ps];
  45   void *mem;
  46   int fd;
  47   pthread_mutexattr_t ma;
  48   pthread_mutex_t *mut1;
  49   pthread_mutex_t *mut2;
  50   pthread_condattr_t ca;
  51   pthread_cond_t *cond;
  52   pid_t pid;
  53   int result = 0;
  54   int p;
  55
  56   fd = mkstemp (tmpfname);
  57   if (fd == -1)
  58     {
  59       printf ("cannot open temporary file: %m\n");
  60       return 1;
  61     }
  62
  63   /* Make sure it is always removed.  */
  64   unlink (tmpfname);
  65
  66   /* Create one page of data.  */
  67   memset (data, '\0', ps);
  68
  69   /* Write the data to the file.  */
  70   if (write (fd, data, ps) != (ssize_t) ps)
  71     {
  72       puts ("short write");
  73       return 1;
  74     }
  75
  76   mem = mmap (NULL, ps, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
  77   if (mem == MAP_FAILED)
  78     {
  79       printf ("mmap failed: %m\n");
  80       return 1;
  81     }
  82
  83   mut1 = (pthread_mutex_t *) (((uintptr_t) mem
  84                                + __alignof (pthread_mutex_t))
  85                               & ~(__alignof (pthread_mutex_t) - 1));
  86   mut2 = mut1 + 1;
  87
  88   cond = (pthread_cond_t *) (((uintptr_t) (mut2 + 1)
  89                               + __alignof (pthread_cond_t))
  90                              & ~(__alignof (pthread_cond_t) - 1));
  91
  92   condition = (int *) (((uintptr_t) (cond + 1) + __alignof (int))
  93                        & ~(__alignof (int) - 1));
  94
  95   if (pthread_mutexattr_init (&ma) != 0)
  96     {
  97       puts ("mutexattr_init failed");
  98       return 1;
  99     }
 100
 101   if (pthread_mutexattr_getpshared (&ma, &p) != 0)
 102     {
 103       puts ("1st mutexattr_getpshared failed");
 104       return 1;
 105     }
 106
 107   if (p != PTHREAD_PROCESS_PRIVATE)
 108     {
 109       puts ("default pshared value wrong");
 110       return 1;
 111     }
 112
 113   if (pthread_mutexattr_setpshared (&ma, PTHREAD_PROCESS_SHARED) != 0)
 114     {
 115       puts ("mutexattr_setpshared failed");
 116       return 1;
 117     }
 118
 119   if (pthread_mutexattr_getpshared (&ma, &p) != 0)
 120     {
 121       puts ("2nd mutexattr_getpshared failed");
 122       return 1;
 123     }
 124
 125   if (p != PTHREAD_PROCESS_SHARED)
 126     {
 127       puts ("pshared value after setpshared call wrong");
 128       return 1;
 129     }
 130
 131   if (pthread_mutex_init (mut1, &ma) != 0)
 132     {
 133       puts ("1st mutex_init failed");
 134       return 1;
 135     }
 136
 137   if (pthread_mutex_init (mut2, &ma) != 0)
 138     {
 139       puts ("2nd mutex_init failed");
 140       return 1;
 141     }
 142
 143   if (pthread_condattr_init (&ca) != 0)
 144     {
 145       puts ("condattr_init failed");
 146       return 1;
 147     }
 148
 149   if (pthread_condattr_getpshared (&ca, &p) != 0)
 150     {
 151       puts ("1st condattr_getpshared failed");
 152       return 1;
 153     }
 154
 155   if (p != PTHREAD_PROCESS_PRIVATE)
 156     {
 157       puts ("default value for pshared in condattr wrong");
 158       return 1;
 159     }
 160
 161   if (pthread_condattr_setpshared (&ca, PTHREAD_PROCESS_SHARED) != 0)
 162     {
 163       puts ("condattr_setpshared failed");
 164       return 1;
 165     }
 166
 167   if (pthread_condattr_getpshared (&ca, &p) != 0)
 168     {
 169       puts ("2nd condattr_getpshared failed");
 170       return 1;
 171     }
 172
 173   if (p != PTHREAD_PROCESS_SHARED)
 174     {
 175       puts ("pshared condattr still not set");
 176       return 1;
 177     }
 178
 179   if (pthread_cond_init (cond, &ca) != 0)
 180     {
 181       puts ("cond_init failed");
 182       return 1;
 183     }
 184
 185   if (pthread_mutex_lock (mut1) != 0)
 186     {
 187       puts ("parent: 1st mutex_lock failed");
 188       return 1;
 189     }
 190
 191   puts ("going to fork now");
 192   pid = fork ();
 193   if (pid == -1)
 194     {
 195       puts ("fork failed");
 196       return 1;
 197     }
 198   else if (pid == 0)
 199     {
 200       if (pthread_mutex_lock (mut2) != 0)
 201         {
 202           puts ("child: mutex_lock failed");
 203           return 1;
 204         }
 205
 206       if (pthread_mutex_unlock (mut1) != 0)
 207         {
 208           puts ("child: 1st mutex_unlock failed");
 209           return 1;
 210         }
 211
 212       do
 213         if (pthread_cond_wait (cond, mut2) != 0)
 214           {
 215             puts ("child: cond_wait failed");
 216             return 1;
 217           }
 218       while (*condition == 0);
 219
 220       if (pthread_mutex_unlock (mut2) != 0)
 221         {
 222           puts ("child: 2nd mutex_unlock failed");
 223           return 1;
 224         }
 225
 226       puts ("child done");
 227     }
 228   else
 229     {
 230       int status;
 231
 232       if (pthread_mutex_lock (mut1) != 0)
 233         {
 234           puts ("parent: 2nd mutex_lock failed");
 235           return 1;
 236         }
 237
 238       if (pthread_mutex_lock (mut2) != 0)
 239         {
 240           puts ("parent: 3rd mutex_lock failed");
 241           return 1;
 242         }
 243
 244       if (pthread_cond_signal (cond) != 0)
 245         {
 246           puts ("parent: cond_signal failed");
 247           return 1;
 248         }
 249
 250       *condition = 1;
 251
 252       if (pthread_mutex_unlock (mut2) != 0)
 253         {
 254           puts ("parent: mutex_unlock failed");
 255           return 1;
 256         }
 257
 258       puts ("waiting for child");
 259
 260       waitpid (pid, &status, 0);
 261       result |= status;
 262
 263       puts ("parent done");
 264     }
 265
 266  return result;
 267 #endif
 268 }
 269
 270 #define TEST_FUNCTION do_test ()
 271 #include "../test-skeleton.c"