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authorMark Kettenis <kettenis@gnu.org>2000-01-23 10:10:02 +0000
committerMark Kettenis <kettenis@gnu.org>2000-01-23 10:10:02 +0000
commitabf7fd42256cd1bf76d1ec702c8460da3e3d8a68 (patch)
tree77495e71a56782ed4e6d5abb2bf85770e236b7b4 /sysdeps/mach/hurd/setitimer.c
parent786731fc3c71df6dff871c14a28d1a8e997d3f2d (diff)
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2000-01-08 Mark Kettenis <kettenis@gnu.org>
* sysdeps/mach/hurd/setitimer.c (quantize_timeval): New function. (setitimer_locked): Use it to quantize the timer values. Use quantized timer values to check if the timeout changed.
Diffstat (limited to 'sysdeps/mach/hurd/setitimer.c')
-rw-r--r--sysdeps/mach/hurd/setitimer.c24
1 files changed, 21 insertions, 3 deletions
diff --git a/sysdeps/mach/hurd/setitimer.c b/sysdeps/mach/hurd/setitimer.c
index b0e70e89f9..df7c69f4f9 100644
--- a/sysdeps/mach/hurd/setitimer.c
+++ b/sysdeps/mach/hurd/setitimer.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
+/* Copyright (C) 1994, 1995, 1996, 1997, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -36,6 +36,22 @@ vm_address_t _hurd_itimer_thread_stack_base; /* Base of its stack. */
vm_address_t _hurd_itimer_thread_stack_size; /* Size of its stack. */
struct timeval _hurd_itimer_started; /* Time the thread started waiting. */
+static void
+quantize_timeval (struct timeval *tv)
+{
+ static time_t quantum = -1;
+
+ if (quantum == -1)
+ quantum = 1000000 / __libc_clk_tck ();
+
+ tv->tv_usec = ((tv->tv_usec + (quantum - 1)) / quantum) * quantum;
+ if (tv->tv_usec >= 1000000)
+ {
+ ++tv->tv_sec;
+ tv->tv_usec -= 1000000;
+ }
+}
+
static inline void
subtract_timeval (struct timeval *from, const struct timeval *subtract)
{
@@ -165,6 +181,8 @@ setitimer_locked (const struct itimerval *new, struct itimerval *old,
}
newval = *new;
+ quantize_timeval (&newval.it_interval);
+ quantize_timeval (&newval.it_value);
if ((newval.it_value.tv_sec | newval.it_value.tv_usec) != 0)
{
/* Make sure the itimer thread is set up. */
@@ -267,8 +285,8 @@ setitimer_locked (const struct itimerval *new, struct itimerval *old,
}
}
/* See if the timeout changed. If so, we must alert the itimer thread. */
- else if (remaining.tv_sec != new->it_value.tv_sec ||
- remaining.tv_usec != new->it_value.tv_usec)
+ else if (remaining.tv_sec != newval.it_value.tv_sec ||
+ remaining.tv_usec != newval.it_value.tv_usec)
{
/* The timeout value is changing. Tell the itimer thread to
reexamine it and start counting down. If the itimer thread is