nsprpub/pr/tests/selintr.c

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* ***** BEGIN LICENSE BLOCK *****
   3  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   4  *
   5  * The contents of this file are subject to the Mozilla Public License Version
   6  * 1.1 (the "License"); you may not use this file except in compliance with
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  11  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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  13  * License.
  14  *
  15  * The Original Code is the Netscape Portable Runtime (NSPR).
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  17  * The Initial Developer of the Original Code is
  18  * Netscape Communications Corporation.
  19  * Portions created by the Initial Developer are Copyright (C) 2000
  20  * the Initial Developer. All Rights Reserved.
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  24  * Alternatively, the contents of this file may be used under the terms of
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  36  * ***** END LICENSE BLOCK ***** */
  37
  38 /*
  39  * Test whether classic NSPR's select() wrapper properly blocks
  40  * the periodic SIGALRM clocks.  On some platforms (such as
  41  * HP-UX and SINIX) an interrupted select() system call is
  42  * restarted with the originally specified timeout, ignoring
  43  * the time that has elapsed.  If a select() call is interrupted
  44  * repeatedly, it will never time out.  (See Bugzilla bug #39674.)
  45  */
  46
  47 #if !defined(XP_UNIX)
  48
  49 /*
  50  * This test is applicable to Unix only.
  51  */
  52
  53 int main()
  54 {
  55     return 0;
  56 }
  57
  58 #else /* XP_UNIX */
  59
  60 #include "nspr.h"
  61
  62 #include <sys/time.h>
  63 #include <stdio.h>
  64
  65 int main()
  66 {
  67     struct timeval timeout;
  68     int rv;
  69
  70     PR_SetError(0, 0);  /* force NSPR to initialize */
  71     PR_EnableClockInterrupts();
  72
  73     /* 2 seconds timeout */
  74     timeout.tv_sec = 2;
  75     timeout.tv_usec = 0;
  76     rv = select(1, NULL, NULL, NULL, &timeout);
  77     printf("select returned %d\n", rv);
  78     return 0;
  79 }
  80
  81 #endif /* XP_UNIX */