1 // posix.cc -- Helper functions for POSIX-flavored OSs.
3 /* Copyright (C) 2000, 2001 Free Software Foundation
5 This file is part of libgcj.
7 This software is copyrighted work licensed under the terms of the
8 Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
18 #include <java/lang/Thread.h>
19 #include <java/io/InterruptedIOException.h>
22 extern "C" unsigned long long _clock (void);
25 // gettimeofday implementation.
27 _Jv_gettimeofday (struct timeval *tv)
29 #if defined (HAVE_GETTIMEOFDAY)
30 gettimeofday (tv, NULL);
31 #elif defined (HAVE_TIME)
32 tv->tv_sec = time (NULL);
34 #elif defined (HAVE_FTIME)
38 tv->tv_usec = t.millitm * 1000;
41 tv->tv_sec = _clock () / 1000;
44 // In the absence of any function, time remains forever fixed.
50 // A wrapper for select() which ignores EINTR.
52 _Jv_select (int n, fd_set *readfds, fd_set *writefds,
53 fd_set *exceptfds, struct timeval *timeout)
56 // If we have a timeout, compute the absolute ending time.
57 struct timeval end, delay;
60 _Jv_gettimeofday (&end);
61 end.tv_usec += timeout->tv_usec;
62 if (end.tv_usec >= 1000000)
65 end.tv_usec -= 1000000;
67 end.tv_sec += timeout->tv_sec;
73 delay.tv_sec = delay.tv_usec = 0;
78 int r = select (n, readfds, writefds, exceptfds,
79 timeout ? &delay : NULL);
80 if (r != -1 || errno != EINTR)
83 // Here we know we got EINTR.
84 if (java::lang::Thread::interrupted ())
85 throw new java::io::InterruptedIOException (JvNewStringLatin1 ("select interrupted"));
90 _Jv_gettimeofday (&after);
91 // Now compute new timeout argument.
92 delay.tv_usec = end.tv_usec - after.tv_usec;
93 delay.tv_sec = end.tv_sec - after.tv_sec;
94 if (delay.tv_usec < 0)
97 delay.tv_usec += 1000000;
101 // We assume that the user wants a valid select() call
102 // more than precise timing. So if we get a series of
103 // EINTR we just keep trying with delay 0 until we get a
109 #else /* HAVE_SELECT */