]>
gcc.gnu.org Git - gcc.git/blob - libjava/posix.cc
1 // posix.cc -- Helper functions for POSIX-flavored OSs.
3 /* Copyright (C) 2000 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 extern "C" unsigned long long _clock (void);
21 // gettimeofday implementation.
23 _Jv_gettimeofday (struct timeval
*tv
)
25 #if defined (HAVE_GETTIMEOFDAY)
26 gettimeofday (tv
, NULL
);
27 #elif defined (HAVE_TIME)
28 tv
->tv_sec
= time (NULL
);
30 #elif defined (HAVE_FTIME)
34 tv
->tv_usec
= t
.millitm
* 1000;
37 tv
->tv_sec
= _clock () / 1000;
40 // In the absence of any function, time remains forever fixed.
46 // A wrapper for select() which ignores EINTR.
48 _Jv_select (int n
, fd_set
*readfds
, fd_set
*writefds
,
49 fd_set
*exceptfds
, struct timeval
*timeout
)
52 // If we have a timeout, compute the absolute ending time.
53 struct timeval end
, delay
;
56 _Jv_gettimeofday (&end
);
57 end
.tv_usec
+= timeout
->tv_usec
;
58 if (end
.tv_usec
>= 1000000)
61 end
.tv_usec
-= 1000000;
63 end
.tv_sec
+= timeout
->tv_sec
;
69 delay
.tv_sec
= delay
.tv_usec
= 0;
74 int r
= select (n
, readfds
, writefds
, exceptfds
,
75 timeout
? &delay
: NULL
);
76 if (r
!= -1 || errno
!= EINTR
)
82 _Jv_gettimeofday (&after
);
83 // Now compute new timeout argument.
84 delay
.tv_usec
= end
.tv_usec
- after
.tv_usec
;
85 delay
.tv_sec
= end
.tv_sec
- after
.tv_sec
;
86 if (delay
.tv_usec
< 0)
89 delay
.tv_usec
+= 1000000;
93 // We assume that the user wants a valid select() call
94 // more than precise timing. So if we get a series of
95 // EINTR we just keep trying with delay 0 until we get a
101 #else /* HAVE_SELECT */
This page took 0.062036 seconds and 5 git commands to generate.