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libc/winsup/cygwin/times.cc

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/* times.cc
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#define __timezonefunc__
#include "winsup.h"
#include <sys/times.h>
#include <sys/timeb.h>
#include <sys/param.h>
#include <utime.h>
#include <stdlib.h>
#include <unistd.h>
#include "cygerrno.h"
#include "security.h"
#include "path.h"
#include "fhandler.h"
#include "dtable.h"
#include "cygheap.h"
#include "pinfo.h"
#include "thread.h"
#include "cygtls.h"
#include "ntdll.h"
hires_ms NO_COPY gtod;
hires_ns NO_COPY ntod;
static inline void __attribute__ ((always_inline))
get_system_time (PLARGE_INTEGER systime)
{
wincap.has_precise_system_time ()
? GetSystemTimePreciseAsFileTime ((LPFILETIME) systime)
: GetSystemTimeAsFileTime ((LPFILETIME) systime);
}
/* Cygwin internal */
static uint64_t __stdcall
__to_clock_t (PLARGE_INTEGER src, int flag)
{
uint64_t total = src->QuadPart;
/* Convert into clock ticks - the total is in 10ths of a usec. */
if (flag)
total -= FACTOR;
total /= NS100PERSEC / CLOCKS_PER_SEC;
return total;
}
/* times: POSIX 4.5.2.1 */
extern "C" clock_t
times (struct tms *buf)
{
static SYSTEM_TIMEOFDAY_INFORMATION stodi;
KERNEL_USER_TIMES kut;
LARGE_INTEGER ticks;
clock_t tc = (clock_t) -1;
__try
{
/* Fetch boot time if we haven't already. */
if (!stodi.BootTime.QuadPart)
NtQuerySystemInformation (SystemTimeOfDayInformation,
&stodi, sizeof stodi, NULL);
NtQueryInformationProcess (NtCurrentProcess (), ProcessTimes,
&kut, sizeof kut, NULL);
get_system_time (&ticks);
/* uptime */
ticks.QuadPart -= stodi.BootTime.QuadPart;
/* ticks is in in 100ns, convert to clock ticks. */
tc = (clock_t) (ticks.QuadPart * CLOCKS_PER_SEC / NS100PERSEC);
buf->tms_stime = __to_clock_t (&kut.KernelTime, 0);
buf->tms_utime = __to_clock_t (&kut.UserTime, 0);
timeval_to_filetime (&myself->rusage_children.ru_stime, &kut.KernelTime);
buf->tms_cstime = __to_clock_t (&kut.KernelTime, 1);
timeval_to_filetime (&myself->rusage_children.ru_utime, &kut.UserTime);
buf->tms_cutime = __to_clock_t (&kut.UserTime, 1);
}
__except (EFAULT)
{
tc = (clock_t) -1;
}
__endtry
syscall_printf ("%D = times(%p)", tc, buf);
return tc;
}
EXPORT_ALIAS (times, _times)
/* settimeofday: BSD */
extern "C" int
settimeofday (const struct timeval *tv, const struct timezone *tz)
{
SYSTEMTIME st;
struct tm *ptm;
int res = -1;
__try
{
if (tv->tv_usec < 0 || tv->tv_usec >= USPERSEC)
{
set_errno (EINVAL);
return -1;
}
ptm = gmtime (&tv->tv_sec);
st.wYear = ptm->tm_year + 1900;
st.wMonth = ptm->tm_mon + 1;
st.wDayOfWeek = ptm->tm_wday;
st.wDay = ptm->tm_mday;
st.wHour = ptm->tm_hour;
st.wMinute = ptm->tm_min;
st.wSecond = ptm->tm_sec;
st.wMilliseconds = tv->tv_usec / (USPERSEC / MSPERSEC);
res = -!SetSystemTime (&st);
gtod.reset ();
if (res)
set_errno (EPERM);
}
__except (EFAULT)
{
res = -1;
}
__endtry
syscall_printf ("%R = settimeofday(%p, %p)", res, tv, tz);
return res;
}
/* stime: SVr4 */
extern "C" int
stime (const time_t *t)
{
struct timeval tv = { *t, 0 };
return settimeofday(&tv, NULL);
}
/* timezone: standards? */
extern "C" char *
timezone (void)
{
char *b = _my_tls.locals.timezone_buf;
tzset ();
__small_sprintf (b,"GMT%+d:%02d", (int) (-_timezone / 3600), (int) (abs (_timezone / 60) % 60));
return b;
}
/* Cygwin internal */
void __stdcall
totimeval (struct timeval *dst, PLARGE_INTEGER src, int sub, int flag)
{
int64_t x = __to_clock_t (src, flag);
x *= (int64_t) USPERSEC / CLOCKS_PER_SEC; /* Turn x into usecs */
x -= (int64_t) sub * USPERSEC;
dst->tv_usec = x % USPERSEC; /* And split */
dst->tv_sec = x / USPERSEC;
}
/* FIXME: Make thread safe */
extern "C" int
gettimeofday (struct timeval *__restrict tv, void *__restrict tzvp)
{
struct timezone *tz = (struct timezone *) tzvp;
static bool tzflag;
LONGLONG now = gtod.usecs ();
if (now == (LONGLONG) -1)
return -1;
tv->tv_sec = now / USPERSEC;
tv->tv_usec = now % USPERSEC;
if (tz != NULL)
{
if (!tzflag)
{
tzset ();
tzflag = true;
}
tz->tz_minuteswest = _timezone / 60;
tz->tz_dsttime = _daylight;
}
return 0;
}
EXPORT_ALIAS (gettimeofday, _gettimeofday)
/* Cygwin internal */
void __stdcall
timespec_to_filetime (const struct timespec *time_in, PLARGE_INTEGER out)
{
if (time_in->tv_nsec == UTIME_OMIT)
out->QuadPart = 0;
else
out->QuadPart = time_in->tv_sec * NS100PERSEC
+ time_in->tv_nsec / (NSPERSEC/NS100PERSEC) + FACTOR;
}
/* Cygwin internal */
void __stdcall
timeval_to_filetime (const struct timeval *time_in, PLARGE_INTEGER out)
{
out->QuadPart = time_in->tv_sec * NS100PERSEC
+ time_in->tv_usec * (NS100PERSEC/USPERSEC) + FACTOR;
}
/* Cygwin internal */
bool
timeval_to_ms (const struct timeval *time_in, DWORD &ms)
{
if (time_in->tv_sec < 0 || time_in->tv_usec < 0
|| time_in->tv_usec >= USPERSEC)
return false;
if ((time_in->tv_sec == 0 && time_in->tv_usec == 0)
|| time_in->tv_sec >= (time_t) (INFINITE / MSPERSEC))
ms = INFINITE;
else
ms = time_in->tv_sec * MSPERSEC
+ (time_in->tv_usec + (USPERSEC / MSPERSEC) - 1)
/ (USPERSEC / MSPERSEC);
return true;
}
/* Cygwin internal */
static timeval __stdcall
time_t_to_timeval (time_t in)
{
timeval res;
res.tv_sec = in;
res.tv_usec = 0;
return res;
}
/* Cygwin internal */
static const struct timespec *
timeval_to_timespec (const struct timeval *tvp, struct timespec *tmp)
{
if (!tvp)
return NULL;
tmp[0].tv_sec = tvp[0].tv_sec;
tmp[0].tv_nsec = tvp[0].tv_usec * (NSPERSEC/USPERSEC);
if (tmp[0].tv_nsec < 0)
tmp[0].tv_nsec = 0;
else if (tmp[0].tv_nsec >= NSPERSEC)
tmp[0].tv_nsec = NSPERSEC - 1;
tmp[1].tv_sec = tvp[1].tv_sec;
tmp[1].tv_nsec = tvp[1].tv_usec * (NSPERSEC/USPERSEC);
if (tmp[1].tv_nsec < 0)
tmp[1].tv_nsec = 0;
else if (tmp[1].tv_nsec >= NSPERSEC)
tmp[1].tv_nsec = NSPERSEC - 1;
return tmp;
}
/* Cygwin internal */
/* Convert a Win32 time to "UNIX" format. */
time_t __stdcall
to_time_t (PLARGE_INTEGER ptr)
{
/* A file time is the number of 100ns since jan 1 1601
stuffed into two long words.
A time_t is the number of seconds since jan 1 1970. */
int64_t x = ptr->QuadPart;
/* pass "no time" as epoch */
if (x == 0)
return 0;
x -= FACTOR; /* number of 100ns between 1601 and 1970 */
x /= NS100PERSEC; /* number of 100ns in a second */
return x;
}
/* Cygwin internal */
/* Convert a Win32 time to "UNIX" timestruc_t format. */
void __stdcall
to_timestruc_t (PLARGE_INTEGER ptr, timestruc_t *out)
{
/* A file time is the number of 100ns since jan 1 1601
stuffed into two long words.
A timestruc_t is the number of seconds and microseconds since jan 1 1970
stuffed into a time_t and a long. */
int64_t x = ptr->QuadPart;
/* pass "no time" as epoch */
if (x == 0)
{
out->tv_sec = 0;
out->tv_nsec = 0;
return;
}
x -= FACTOR; /* number of 100ns between 1601 and 1970 */
out->tv_sec = x / NS100PERSEC;
out->tv_nsec = (x % NS100PERSEC) * (NSPERSEC/NS100PERSEC);
}
/* Cygwin internal */
/* Get the current time as a "UNIX" timestruc_t format. */
void __stdcall
time_as_timestruc_t (timestruc_t * out)
{
LARGE_INTEGER systime;
get_system_time (&systime);
to_timestruc_t (&systime, out);
}
/* time: POSIX 4.5.1.1, C 4.12.2.4 */
/* Return number of seconds since 00:00 UTC on jan 1, 1970 */
extern "C" time_t
time (time_t * ptr)
{
time_t res;
LARGE_INTEGER systime;
get_system_time (&systime);
res = to_time_t (&systime);
if (ptr)
*ptr = res;
syscall_printf ("%d = time(%p)", res, ptr);
return res;
}
int
utimens_worker (path_conv &win32, const struct timespec *tvp)
{
int res = -1;
if (win32.error)
set_errno (win32.error);
else
{
fhandler_base *fh = NULL;
bool fromfd = false;
cygheap_fdenum cfd (true);
while (cfd.next () >= 0)
if (cfd->get_access () & (FILE_WRITE_ATTRIBUTES | GENERIC_WRITE)
&& RtlEqualUnicodeString (cfd->pc.get_nt_native_path (),
win32.get_nt_native_path (),
cfd->pc.objcaseinsensitive ()))
{
fh = cfd;
fromfd = true;
break;
}
if (!fh)
{
if (!(fh = build_fh_pc (win32)))
goto error;
if (fh->error ())
{
debug_printf ("got %d error from build_fh_pc", fh->error ());
set_errno (fh->error ());
}
}
res = fh->utimens (tvp);
if (!fromfd)
delete fh;
}
error:
syscall_printf ("%R = utimes(%S, %p)", res, win32.get_nt_native_path (), tvp);
return res;
}
/* utimes: POSIX/SUSv3 */
extern "C" int
utimes (const char *path, const struct timeval *tvp)
{
path_conv win32 (path, PC_POSIX | PC_SYM_FOLLOW, stat_suffixes);
struct timespec tmp[2];
return utimens_worker (win32, timeval_to_timespec (tvp, tmp));
}
/* BSD */
extern "C" int
lutimes (const char *path, const struct timeval *tvp)
{
path_conv win32 (path, PC_POSIX | PC_SYM_NOFOLLOW, stat_suffixes);
struct timespec tmp[2];
return utimens_worker (win32, timeval_to_timespec (tvp, tmp));
}
/* futimens: POSIX/SUSv4 */
extern "C" int
futimens (int fd, const struct timespec *tvp)
{
int res;
cygheap_fdget cfd (fd);
if (cfd < 0)
res = -1;
else if (cfd->get_access () & (FILE_WRITE_ATTRIBUTES | GENERIC_WRITE))
res = cfd->utimens (tvp);
else
res = utimens_worker (cfd->pc, tvp);
syscall_printf ("%d = futimens(%d, %p)", res, fd, tvp);
return res;
}
/* BSD */
extern "C" int
futimes (int fd, const struct timeval *tvp)
{
struct timespec tmp[2];
return futimens (fd, timeval_to_timespec (tvp, tmp));
}
/* utime: POSIX 5.6.6.1 */
extern "C" int
utime (const char *path, const struct utimbuf *buf)
{
struct timeval tmp[2];
if (buf == 0)
return utimes (path, 0);
debug_printf ("incoming utime act %lx", buf->actime);
tmp[0] = time_t_to_timeval (buf->actime);
tmp[1] = time_t_to_timeval (buf->modtime);
return utimes (path, tmp);
}
/* ftime: standards? */
extern "C" int
ftime (struct timeb *tp)
{
struct timeval tv;
struct timezone tz;
if (gettimeofday (&tv, &tz) < 0)
return -1;
tp->time = tv.tv_sec;
tp->millitm = tv.tv_usec / 1000;
tp->timezone = tz.tz_minuteswest;
tp->dstflag = tz.tz_dsttime;
return 0;
}
#define stupid_printf if (cygwin_finished_initializing) debug_printf
void
hires_ns::prime ()
{
LARGE_INTEGER ifreq;
if (!QueryPerformanceFrequency (&ifreq))
{
inited = -1;
return;
}
int priority = GetThreadPriority (GetCurrentThread ());
SetThreadPriority (GetCurrentThread (), THREAD_PRIORITY_TIME_CRITICAL);
if (!QueryPerformanceCounter (&primed_pc))
{
SetThreadPriority (GetCurrentThread (), priority);
inited = -1;
return;
}
freq = (double) ((double) NSPERSEC / (double) ifreq.QuadPart);
inited = true;
SetThreadPriority (GetCurrentThread (), priority);
}
LONGLONG
hires_ns::nsecs (bool monotonic)
{
if (!inited)
prime ();
if (inited < 0)
{
set_errno (ENOSYS);
return (LONGLONG) -1;
}
LARGE_INTEGER now;
if (!QueryPerformanceCounter (&now))
{
set_errno (ENOSYS);
return -1;
}
// FIXME: Use round() here?
now.QuadPart = (LONGLONG) (freq * (double)
(now.QuadPart - (monotonic ? 0LL : primed_pc.QuadPart)));
return now.QuadPart;
}
LONGLONG
hires_ms::nsecs ()
{
LARGE_INTEGER systime;
get_system_time (&systime);
/* Add conversion factor for UNIX vs. Windows base time */
return systime.QuadPart - FACTOR;
}
extern "C" int
clock_gettime (clockid_t clk_id, struct timespec *tp)
{
if (CLOCKID_IS_PROCESS (clk_id))
{
pid_t pid = CLOCKID_TO_PID (clk_id);
HANDLE hProcess;
KERNEL_USER_TIMES kut;
int64_t x;
if (pid == 0)
pid = getpid ();
pinfo p (pid);
if (!p || !p->exists ())
{
set_errno (EINVAL);
return -1;
}
hProcess = OpenProcess (PROCESS_QUERY_LIMITED_INFORMATION, 0,
p->dwProcessId);
NtQueryInformationProcess (hProcess, ProcessTimes,
&kut, sizeof kut, NULL);
x = kut.KernelTime.QuadPart + kut.UserTime.QuadPart;
tp->tv_sec = x / NS100PERSEC;
tp->tv_nsec = (x % NS100PERSEC) * (NSPERSEC/NS100PERSEC);
CloseHandle (hProcess);
return 0;
}
if (CLOCKID_IS_THREAD (clk_id))
{
long thr_id = CLOCKID_TO_THREADID (clk_id);
HANDLE hThread;
KERNEL_USER_TIMES kut;
int64_t x;
if (thr_id == 0)
thr_id = pthread::self ()->getsequence_np ();
hThread = OpenThread (THREAD_QUERY_LIMITED_INFORMATION, 0, thr_id);
if (!hThread)
{
set_errno (EINVAL);
return -1;
}
NtQueryInformationThread (hThread, ThreadTimes,
&kut, sizeof kut, NULL);
x = kut.KernelTime.QuadPart + kut.UserTime.QuadPart;
tp->tv_sec = x / NS100PERSEC;
tp->tv_nsec = (x % NS100PERSEC) * (NSPERSEC/NS100PERSEC);
CloseHandle (hThread);
return 0;
}
switch (clk_id)
{
case CLOCK_REALTIME:
{
LONGLONG now = gtod.nsecs ();
if (now == (LONGLONG) -1)
return -1;
tp->tv_sec = now / NS100PERSEC;
tp->tv_nsec = (now % NS100PERSEC) * (NSPERSEC / NS100PERSEC);
break;
}
case CLOCK_MONOTONIC:
{
LONGLONG now = ntod.nsecs (true);
if (now == (LONGLONG) -1)
return -1;
tp->tv_sec = now / NSPERSEC;
tp->tv_nsec = (now % NSPERSEC);
break;
}
default:
set_errno (EINVAL);
return -1;
}
return 0;
}
extern "C" int
clock_settime (clockid_t clk_id, const struct timespec *tp)
{
struct timeval tv;
if (CLOCKID_IS_PROCESS (clk_id) || CLOCKID_IS_THREAD (clk_id))
/* According to POSIX, the privileges to set a particular clock
* are implementation-defined. On Linux, CPU-time clocks are not
* settable; do the same here.
*/
{
set_errno (EPERM);
return -1;
}
if (clk_id != CLOCK_REALTIME)
{
set_errno (EINVAL);
return -1;
}
tv.tv_sec = tp->tv_sec;
tv.tv_usec = tp->tv_nsec / 1000;
return settimeofday (&tv, NULL);
}
static ULONG minperiod; // FIXME: Maintain period after a fork.
LONGLONG
hires_ns::resolution ()
{
if (!inited)
prime ();
if (inited < 0)
{
set_errno (ENOSYS);
return (LONGLONG) -1;
}
return (freq <= 1.0) ? 1LL : (LONGLONG) freq;
}
UINT
hires_ms::resolution ()
{
if (!minperiod)
{
ULONG coarsest, finest, actual;
NtQueryTimerResolution (&coarsest, &finest, &actual);
/* The actual resolution of the OS timer is a system-wide setting which
can be changed any time, by any process. The only fixed value we
can rely on is the coarsest value. */
minperiod = coarsest;
}
return minperiod;
}
extern "C" int
clock_getres (clockid_t clk_id, struct timespec *tp)
{
if (CLOCKID_IS_PROCESS (clk_id) || CLOCKID_IS_THREAD (clk_id))
{
ULONG coarsest, finest, actual;
NtQueryTimerResolution (&coarsest, &finest, &actual);
tp->tv_sec = coarsest / NS100PERSEC;
tp->tv_nsec = (coarsest % NS100PERSEC) * (NSPERSEC/NS100PERSEC);
return 0;
}
switch (clk_id)
{
case CLOCK_REALTIME:
{
DWORD period = gtod.resolution ();
tp->tv_sec = period / NS100PERSEC;
tp->tv_nsec = (period % NS100PERSEC) * (NSPERSEC/NS100PERSEC);
break;
}
case CLOCK_MONOTONIC:
{
LONGLONG period = ntod.resolution ();
tp->tv_sec = period / NSPERSEC;
tp->tv_nsec = period % NSPERSEC;
break;
}
default:
set_errno (EINVAL);
return -1;
}
return 0;
}
extern "C" int
clock_setres (clockid_t clk_id, struct timespec *tp)
{
static NO_COPY bool period_set;
int status;
if (clk_id != CLOCK_REALTIME)
{
set_errno (EINVAL);
return -1;
}
/* Convert to 100ns to match OS resolution. The OS uses ULONG values
to express resolution in 100ns units, so the coarsest timer resolution
is < 430 secs. Actually the coarsest timer resolution is only slightly
beyond 15ms, but this might change in future OS versions, so we play nice
here. */
ULONGLONG period = tp->tv_sec * NS100PERSEC
+ (tp->tv_nsec + (NSPERSEC/NS100PERSEC) - 1)
/ (NSPERSEC/NS100PERSEC);
/* clock_setres is non-POSIX/non-Linux. On QNX, the function always
rounds the incoming value to the nearest supported value. */
ULONG coarsest, finest, actual;
if (NT_SUCCESS (NtQueryTimerResolution (&coarsest, &finest, &actual)))
{
if (period > coarsest)
period = coarsest;
else if (finest > period)
period = finest;
}
if (period_set
&& NT_SUCCESS (NtSetTimerResolution (minperiod, FALSE, &actual)))
period_set = false;
status = NtSetTimerResolution (period, TRUE, &actual);
if (!NT_SUCCESS (status))
{
__seterrno_from_nt_status (status);
return -1;
}
minperiod = period;
period_set = true;
return 0;
}
extern "C" int
clock_getcpuclockid (pid_t pid, clockid_t *clk_id)
{
if (pid != 0)
{
pinfo p (pid);
if (!p || !p->exists ())
return (ESRCH);
}
*clk_id = (clockid_t) PID_TO_CLOCKID (pid);
return 0;
}
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