Fix nanosleep returning negative rem
Corinna Vinschen
corinna-cygwin@cygwin.com
Wed Jul 21 09:33:05 GMT 2021
On Jul 21 11:30, Corinna Vinschen wrote:
> I wrote a quick STC using the NT API calls and I can't reproduce the
> problem with this code either. The output is either
>
> SignalState: 1 TimeRemaining: -5354077459183
>
> or
>
> SignalState: 0 TimeRemaining: 653
>
> I never get a small negative value in the latter case. Can you
> reproduce your problem with this testcase or tweak it to reproduce it?
Now I actually attached the code :}
Corinna
-------------- next part --------------
#include <stdio.h>
#include <w32api/windows.h>
#include <w32api/winternl.h>
#include <w32api/ntdef.h>
typedef enum _TIMER_INFORMATION_CLASS {
TimerBasicInformation = 0
} TIMER_INFORMATION_CLASS, *PTIMER_INFORMATION_CLASS;
typedef struct _TIMER_BASIC_INFORMATION {
LARGE_INTEGER TimeRemaining;
BOOLEAN SignalState;
} TIMER_BASIC_INFORMATION, *PTIMER_BASIC_INFORMATION;
NTSTATUS NTAPI NtCreateTimer(PHANDLE, ACCESS_MASK, POBJECT_ATTRIBUTES,
TIMER_TYPE);
NTSTATUS NTAPI NtCancelTimer(HANDLE, PBOOLEAN);
NTSTATUS NTAPI NtSetTimer(HANDLE, PLARGE_INTEGER, PVOID, PVOID,
BOOLEAN, LONG, PBOOLEAN);
NTSTATUS NTAPI NtQueryTimer (HANDLE, TIMER_INFORMATION_CLASS, PVOID,
ULONG, PULONG);
int
main ()
{
HANDLE event;
HANDLE timer;
NTSTATUS status;
LARGE_INTEGER timeout;
TIMER_BASIC_INFORMATION tbi;
event = CreateEvent (NULL, TRUE, FALSE, NULL);
status = NtCreateTimer (&timer, TIMER_ALL_ACCESS, NULL, NotificationTimer);
if (!NT_SUCCESS (status))
{
fprintf (stderr, "NtCreateTimer: 0x%08lx\n", status);
return 1;
}
timeout.QuadPart = -10000000LL; /* 1 sec */
status = NtSetTimer (timer, &timeout, NULL, NULL, FALSE, 0, NULL);
if (!NT_SUCCESS (status))
{
fprintf (stderr, "NtSetTimer: 0x%08lx\n", status);
return 1;
}
WaitForSingleObject (event, 985L);
NtQueryTimer (timer, TimerBasicInformation, &tbi, sizeof tbi, NULL);
printf ("SignalState: %d TimeRemaining: %lld\n", tbi.SignalState,
tbi.TimeRemaining.QuadPart);
NtCancelTimer (timer, NULL);
NtClose (timer);
return 0;
}
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