kc3-lang/gnulib/tests/test-nanosleep.c

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• Hash : a905b350
  Author :
  Date : 2009-11-18T20:10:42
  

  nanosleep: work around cygwin bug
  
  Cygwin 1.5.x mistakenly failed with EINVAL for a duration longer
  than 49.7 days (2**32 milliseconds).  Meanwhile, the existing
  code for HAVE_BUG_BIG_NANOSLEEP would infloop, instead of return
  failure, for invalid arguments.
  
  * lib/nanosleep.c (rpl_nanosleep) [HAVE_BUG_BIG_NANOSLEEP]:
  Fix logic bug when nanosleep fails.  Work around cygwin 1.5.x
  bug.
  (getnow): Delete, not needed.
  * m4/nanosleep.m4 (gl_FUNC_NANOSLEEP): No longer require
  LIB_CLOCK_GETTIME.
  * modules/nanosleep (Depends-on): Add intprops and verify.  Drop
  clock-time, gettime.
  * doc/posix-functions/nanosleep.texi (nanosleep): Document the
  bug.
  * modules/nanosleep-tests: New test.
  * tests/test-nanosleep.c: New file.
  
  Signed-off-by: Eric Blake <ebb9@byu.net>
  

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• tests/test-nanosleep.c

• /* Test of nanosleep() function.
     Copyright (C) 2009 Free Software Foundation, Inc.
  
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 3 of the License, or
     (at your option) any later version.
  
     This program 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 General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  
  /* Written by Eric Blake <ebb9@byu.net>, 2009.  */
  
  #include <config.h>
  
  #include <time.h>
  
  #include <errno.h>
  #include <signal.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <unistd.h>
  
  #include "intprops.h"
  
  #define ASSERT(expr) \
    do                                                                         \
      {                                                                        \
        if (!(expr))                                                           \
          {                                                                    \
            fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
            fflush (stderr);                                                   \
            abort ();                                                          \
          }                                                                    \
      }                                                                        \
    while (0)
  
  #if HAVE_DECL_ALARM
  static void
  handle_alarm (int sig)
  {
    if (sig != SIGALRM)
      _exit (1);
  }
  #endif
  
  int
  main()
  {
    struct timespec ts;
  
    ts.tv_sec = 1000;
    ts.tv_nsec = -1;
    errno = 0;
    ASSERT (nanosleep (&ts, NULL) == -1);
    ASSERT (errno == EINVAL);
    ts.tv_nsec = 1000000000;
    errno = 0;
    ASSERT (nanosleep (&ts, NULL) == -1);
    ASSERT (errno == EINVAL);
  
    ts.tv_sec = 0;
    ts.tv_nsec = 1;
    ASSERT (nanosleep (&ts, &ts) == 0);
    /* Remaining time is only defined on EINTR failure; but on success,
       it is typically either 0 or unchanged from input.  At any rate,
       it shouldn't be randomly changed to unrelated values.  */
    ASSERT (ts.tv_sec == 0);
    ASSERT (ts.tv_nsec == 0 || ts.tv_nsec == 1);
    ts.tv_nsec = 0;
    ASSERT (nanosleep (&ts, NULL) == 0);
  
  #if HAVE_DECL_ALARM
    {
      const time_t pentecost = 50 * 24 * 60 * 60; /* 50 days.  */
      signal (SIGALRM, handle_alarm);
      alarm (1);
      ts.tv_sec = pentecost;
      ts.tv_nsec = 999999999;
      errno = 0;
      ASSERT (nanosleep (&ts, &ts) == -1);
      ASSERT (errno == EINTR);
      ASSERT (pentecost - 10 < ts.tv_sec && ts.tv_sec <= pentecost);
      ASSERT (0 <= ts.tv_nsec && ts.tv_nsec <= 999999999);
    }
  #endif
  
    return 0;
  }
  

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