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* signal.cc (nanosleep): Improve test for valid values. Round delay up to

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resolution.  Fix test for negative remainder.  Use timeGetTime through gtod.
(sleep): Round up return value.  Christopher Faylor <cgf@redhat.com>
* hires.h (HIRES_DELAY_MAX): Define.
(hires_ms::minperiod): Declare static.
(hires_ms::resolution): New.
(hires_ms::dmsecs): New.
(hires_ms::prime): Return UINT.
(gtod): Declare.
* times.cc (hires_ms::prime): Always calculate minperiod and set it to 1 in
case of failure.  Return minperiod.
(hires_ms::resolution): Define.
(hires_ms::~hires_ms): Delete.
(hires_ms::usecs): Check minperiod to prime.
(gtod) Define as global.
This commit is contained in:
Christopher Faylor 2003-09-07 05:18:01 +00:00
parent 6cce721b15
commit ed2287adcd
5 changed files with 77 additions and 32 deletions
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23
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,26 @@
2003-09-07 Pierre Humblet <pierre.humblet@ieee.org>
* signal.cc (nanosleep): Improve test for valid values. Round delay up
to resolution. Fix test for negative remainder. Use timeGetTime
through gtod.
(sleep): Round up return value.
2003-09-07 Pierre Humblet <pierre.humblet@ieee.org>
Christopher Faylor <cgf@redhat.com>
* hires.h (HIRES_DELAY_MAX): Define.
(hires_ms::minperiod): Declare static.
(hires_ms::resolution): New.
(hires_ms::dmsecs): New.
(hires_ms::prime): Return UINT.
(gtod): Declare.
* times.cc (hires_ms::prime): Always calculate minperiod and set it to
1 in case of failure. Return minperiod.
(hires_ms::resolution): Define.
(hires_ms::~hires_ms): Delete.
(hires_ms::usecs): Check minperiod to prime.
(gtod) Define as global.
2003-09-06 Christopher Faylor <cgf@redhat.com>
Remove left coercion throughout.

2
winsup/cygwin/fhandler_raw.cc
View File

@ -329,7 +329,7 @@ fhandler_dev_raw::raw_read (void *ptr, size_t& ulen)
}
}
(ssize_t) ulen = bytes_read;
ulen = (size_t) bytes_read;
return;
err:

18
winsup/cygwin/hires.h
View File

@ -13,11 +13,18 @@ details. */
#include <mmsystem.h>
/* Largest delay in ms for sleep and alarm calls.
Allow actual delay to exceed requested delay by 10 s.
Express as multiple of 1000 (i.e. seconds) + max resolution
The tv_sec argument in timeval structures cannot exceed
HIRES_DELAY_MAX / 1000 - 1, so that adding fractional part
and rounding won't exceed HIRES_DELAY_MAX */
#define HIRES_DELAY_MAX (((UINT_MAX - 10000) / 1000) * 1000) + 10
class hires_base
{
protected:
int inited;
virtual void prime () {}
public:
virtual LONGLONG usecs (bool justdelta) {return 0LL;}
virtual ~hires_base () {}
@ -37,9 +44,14 @@ class hires_ms : hires_base
{
DWORD initime_ms;
LARGE_INTEGER initime_us;
UINT minperiod;
void prime ();
static UINT minperiod;
UINT prime ();
public:
LONGLONG usecs (bool justdelta);
UINT dmsecs () { return timeGetTime (); }
UINT resolution () { return minperiod ?: prime (); }
};
extern hires_ms gtod;
#endif /*__HIRES_H__*/

19
winsup/cygwin/signal.cc
View File

@ -17,6 +17,7 @@ details. */
#include <sys/cygwin.h>
#include "sigproc.h"
#include "pinfo.h"
#include "hires.h"
int sigcatchers; /* FIXME: Not thread safe. */
@ -73,20 +74,22 @@ nanosleep (const struct timespec *rqtp, struct timespec *rmtp)
sigframe thisframe (mainthread);
pthread_testcancel ();
if (rqtp->tv_sec < 0 || rqtp->tv_nsec < 0 || rqtp->tv_nsec > 999999999)
if ((unsigned int) rqtp->tv_sec > (HIRES_DELAY_MAX / 1000 - 1)
|| (unsigned int) rqtp->tv_nsec > 999999999)
{
set_errno (EINVAL);
return -1;
}
DWORD req = rqtp->tv_sec * 1000 + (rqtp->tv_nsec + 500000) / 1000000;
DWORD start_time = GetTickCount ();
DWORD end_time = start_time + req;
DWORD resolution = gtod.resolution ();
DWORD req = ((rqtp->tv_sec * 1000 + (rqtp->tv_nsec + 999999) / 1000000
+ resolution - 1) / resolution ) * resolution;
DWORD end_time = gtod.dmsecs () + req;
syscall_printf ("nanosleep (%ld)", req);
int rc = pthread::cancelable_wait (signal_arrived, req);
DWORD now = GetTickCount ();
DWORD rem = (rc == WAIT_TIMEOUT || now >= end_time) ? 0 : end_time - now;
DWORD rem;
if ((rem = end_time - gtod.dmsecs ()) > HIRES_DELAY_MAX)
rem = 0;
if (rc == WAIT_OBJECT_0)
{
(void) thisframe.call_signal_handler ();
@ -111,7 +114,7 @@ sleep (unsigned int seconds)
req.tv_sec = seconds;
req.tv_nsec = 0;
nanosleep (&req, &rem);
return rem.tv_sec + (rem.tv_nsec + 500000000) / 1000000000;
return rem.tv_sec + (rem.tv_nsec > 0);
}
extern "C" unsigned int

47
winsup/cygwin/times.cc
View File

@ -142,11 +142,13 @@ totimeval (struct timeval *dst, FILETIME *src, int sub, int flag)
dst->tv_sec = x / (long long) (1e6);
}
hires_ms gtod;
UINT NO_COPY hires_ms::minperiod;
/* FIXME: Make thread safe */
extern "C" int
gettimeofday (struct timeval *tv, struct timezone *tz)
{
static hires_ms gtod;
static bool tzflag;
LONGLONG now = gtod.usecs (false);
if (now == (LONGLONG) -1)
@ -620,37 +622,42 @@ hires_us::usecs (bool justdelta)
return justdelta ? now.QuadPart : primed_ft.QuadPart + now.QuadPart;
}
void
UINT
hires_ms::prime ()
{
TIMECAPS tc;
FILETIME f;
int priority = GetThreadPriority (GetCurrentThread ());
SetThreadPriority (GetCurrentThread (), THREAD_PRIORITY_TIME_CRITICAL);
if (timeGetDevCaps (&tc, sizeof (tc)) != TIMERR_NOERROR)
minperiod = 0;
else
if (!minperiod)
if (timeGetDevCaps (&tc, sizeof (tc)) != TIMERR_NOERROR)
minperiod = 1;
else
{
minperiod = min (max (tc.wPeriodMin, 1), tc.wPeriodMax);
timeBeginPeriod (minperiod);
}
if (!inited)
{
minperiod = min (max (tc.wPeriodMin, 1), tc.wPeriodMax);
timeBeginPeriod (minperiod);
int priority = GetThreadPriority (GetCurrentThread ());
SetThreadPriority (GetCurrentThread (), THREAD_PRIORITY_TIME_CRITICAL);
initime_ms = timeGetTime ();
GetSystemTimeAsFileTime (&f);
SetThreadPriority (GetCurrentThread (), priority);
inited = 1;
initime_us.HighPart = f.dwHighDateTime;
initime_us.LowPart = f.dwLowDateTime;
initime_us.QuadPart -= FACTOR;
initime_us.QuadPart /= 10;
}
initime_ms = timeGetTime ();
GetSystemTimeAsFileTime (&f);
SetThreadPriority (GetCurrentThread (), priority);
inited = 1;
initime_us.HighPart = f.dwHighDateTime;
initime_us.LowPart = f.dwLowDateTime;
initime_us.QuadPart -= FACTOR;
initime_us.QuadPart /= 10;
return minperiod;
}
LONGLONG
hires_ms::usecs (bool justdelta)
{
if (!inited)
if (!minperiod) /* NO_COPY variable */
prime ();
DWORD now = timeGetTime ();
// FIXME: Not sure how this will handle the 49.71 day wrap around