newlib/winsup/cygwin/times.cc

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/* times.cc
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Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Red Hat, Inc.
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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. */
#include "winsup.h"
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#include <time.h>
#include <sys/times.h>
#include <sys/timeb.h>
#include <utime.h>
#include <stdio.h>
#include <stdlib.h>
#include "cygerrno.h"
#include "security.h"
#include "path.h"
* devices.cc: New file. * devices.gperf: New file. * devices.shilka: New file. * cygwin-gperf: New file. * cygwin-shilka: New file. * fhandler_fifo.cc: New file. * fhandler_nodevice.cc : New file. Reorganize headers so that path.h precedes fhandler.h throughout. Remove device argument and unit arguments from fhandler constructors throughout. Remove pc arguments to fhandler functions and use internal pc element instead, throughout. Use dev element in pc throughout. Use major/minor elements rather than units and device numbers previously in fhandler class. Use correct methods for fhandler file names rather than directly accessing file name variables, throughout. * Makefile.in (DLL_OFILES): Add devices.o, fhandler_fifo.o * dcrt0.cc (dll_crt0_1): Call device::init. * devices.h: Renumber devices based on more Linux-like major/minor numbers. Add more devices. Declare standard device storage. (device): Declare struct. * dir.cc (opendir): Use new 'build_fh_name' to construct a fhandler_* type. * dtable.cc (dtable::get_debugger_info): Ditto. (cygwin_attach_handle_to_fd): Ditto. (dtable::release): Remove special FH_SOCKET case in favor of generic "need_fixup_before" test. (dtable::init_std_file_from_handle): Use either build_fh_dev or build_fh_name to build standard fhandler. (dtable::build_fh_name): Renamed from dtable::build_fhandler_from_name. Move out of dtable class. Don't accept a path_conv argument. Just build it here and pass it to: (build_fh_pc): Renamed from dtable::build_fhandler. Move out of dtable class. Use intrinsic device type in path_conv to create new fhandler. (build_fh_dev): Renamed from dtable::build_fhandler. Move out of dtable class. Simplify arguments to just take new 'device' type and a name. Just return pointer to fhandler rather than trying to insert into dtable. (dtable::dup_worker): Accommodate above build_fh name changes. (dtable::find_fifo): New (currently broken) function. (handle_to_fn): Use strechr for efficiency. * dtable.h: Reflect above build_fh name changes and argument differences. (fhandler_base *&operator []): Return self rather than copy of self. * fhandler.cc (fhandler_base::operator =): Use pc element to set normalized path. (fhandler_base::set_name): Ditto. (fhandler_base::raw_read): Use method to access name. (fhandler_base::write): Correctly use get_output_handle rather than get_handle. (handler_base::device_access_denied): New function. (fhandler_base::open): Eliminate pc argument and use pc element of fhandler_base throughout. (fhandler_base::fstat): Detect if device is based in filesystem and use fstat_fs to calculate stat, if so. (fhandler_base::fhandler_base): Eliminate handling of file names and, instead, just free appropriate component from pc. (fhandler_base::opendir): Remove path_conv parameter. * fhandler.h: Remove all device flags. (fhandler_base::pc): New element. (fhandler_base::set_name): Change argument to path_conv. (fhandler_base::error): New function. (fhandler_base::exists): New function. (fhandler_base::pc_binmode): New function. (fhandler_base::dev): New function. (fhandler_base::open_fs): New function. (fhandler_base::fstat_fs): New function. (fhandler_base::fstat_by_name): New function. (fhandler_base::fstat_by_handle): New function. (fhandler_base::isfifo): New function. (fhandler_base::is_slow): New function. (fhandler_base::is_auto_device): New function. (fhandler_base::is_fs_special): New function. (fhandler_base::device_access_denied): New function. (fhandler_base::operator DWORD&): New operator. (fhandler_base::get_name): Return normalized path from pc. (fhandler_base::get_win32_name): Return windows path from pc. (fhandler_base::isdevice): Renamed from is_device. (fhandler_base::get_native_name): Return device format. (fhandler_fifo): New class. (fhandler_nodevice): New class. (select_stuff::device_specific): Remove array. (select_stuff::device_specific_pipe): New class element. (select_stuff::device_specific_socket): New class element. (select_stuff::device_specific_serial): New class element. (select_stuff::select_stuff): Initialize new elements. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Move to base class from fhandler_disk_file. (fhandler_base::fstat_by_name): Ditto. (fhandler_base::fstat_by_name): Ditto. (fhandler_disk_file::open): Move most functionality into fhandler_base::open_fs. (fhandler_base::open_fs): New function. (fhandler_disk_file::close): Move most functionality into fhandler_base::close_fs. (fhandler_base::close_fs): New function. * fhandler_mem.cc (fhandler_dev_mem::open): Use device name in debugging output. * fhandler_socket.cc (fhandler_socket::set_connect_secret): Copy standard urandom device into appropriate place. (fhandler_socket::accept): Reflect change in fdsock return value. * fhandler_tty.cc: See "throughouts" above. * net.cc: Accommodate fdsock change throughout. (fdsock): Return success or failure, accept fd argument and device argument. * path.cc (symlink_info::major): New element. (symlink_info::minor): New element. (symlink_info::parse_device): Declare new function. (fs_info::update): Accommodate changes in path_conv class. (path_conv::fillin): Ditto. (path_conv::return_and_clear_normalized_path): Eliminate. (path_conv::set_normalized_path): New function. (path_conv::path_conv): Set info in dev element. Use path_conv methods Check for FH_FS rather than FH_BAD to indicate when to fill in filesystem stuff. where appropriate rather than direct access. Use set_normalized_path to set normalized path. (windows_device_names): Eliminate. (get_dev): Ditto. (get_raw_device_number): Ditto. (get_device_number): Ditto. (win32_device_name): Call new device name parser to do most of the heavy lifting. (mount_info::conv_to_win32_path): Fill in dev field as appropriate. (symlink_worker): Handle new device files. (symlink_info::check): Ditto. (symlink_info::parse_device): Define new function. * path.h (executable_states): Move here from fhandler.h. (fs_info): Rename variables to *_storage and create methods for accessing same. (path_conv): Add dev element, remove devn and unit and adjust inline methods to accommodate. (set_normalized_path): Declare new function. * pinfo.cc (_pinfo::commune_recv): Add broken support for handling fifos. (_pinfo::commune_send): Ditto. * pipe.cc (fhandler_pipe::close): check for existence of handle before closing it. (handler_pipe::create): Rename from make_pipe. Change arguments to accept fhandler_pipe array. Accommodate fifos. (pipe): Rework to deal with fhandler_pipe::create changes. (_pipe): Ditto. * select.cc: Use individual device_specific types throughout rather than indexing with obsolete device number. (set_bits): Use is_socket call rather than checking device number. * shared_info.h (CURR_MOUNT_MAGIC): Update. (conv_to_win32_path): Reflect addition of device argument. * syscalls.cc (mknod_worker): New function. (open): Use build_fh_name to build fhandler. (chown_worker): Detect if this is an 'auto' device rather than an on-filesystem device and handle appropriately. (chmod_device): New function. (chmod): Detect if this is an 'auto' device rather than an on-filesystem device and handle appropriately. Use chmod_device to set mode of in-filesystem devices. (stat_worker): Eliminate path_conv argument. Call build_fh_name to construct fhandler. Use fh->error() rather than pc->error to detect errors in fhandler construction. (access_worker): New function pulled from access. Accommodate in-filesystem devices. (access): Use access_worker. (fpathconf): Detect if this is an 'auto' device rather than an on-filesystem device and handle appropriately. (mknod_worker): New function. (mknod32): New function. (chroot): Free normalized path -- assuming it was actually cmalloced. * tty.cc (create_tty_master): Tweak for new device class. (tty::common_init): Ditto. * winsup.h (stat_worker): Remove. (symlink_worker): Declare. * exceptions.cc (set_process_mask): Just call sig_dispatch_pending and don't worry about pending_signals since sig_dispatch_pending should always do the right thing now. (sig_handle): Reorganize SIGCONT handling to more closely conform to SUSv3. * pinfo.h: Move __SIG enum to sigproc.h. (PICOM_FIFO): New enum element. (_pinfo): Remove 'thread2signal' stuff throughout class. (_pinfo::commune_send): Make varargs. (_pinfo::sigtodo): Eliminate. (_pinfo::thread2signal): Ditto. * signal.cc (kill_worker): Eliminate call to setthread2signal. * sigproc.cc (local_sigtodo): Eliminate. (getlocal_sigtodo): Ditto. (sigelem): New class. (pending_signals): New class. (sigqueue): New variable, start of sigqueue linked list. (sigcatch_nonmain): Eliminate. (sigcatch_main): Eliminate. (sigcatch_nosync): Eliminate. (sigcomplete_nonmain): Eliminate. (pending_signals): Eliminate. (sig_clear): Call signal thread to clear pending signals, unless already in signal thread. (sigpending): Call signal thread to get pending signals. (sig_dispatch_pending): Eliminate use of pending_signals and just check sigqueue. (sigproc_terminate): Eliminate all of the obsolete semaphore stuff. Close signal pipe handle. (sig_send): Eliminate all of the obsolete semaphore stuff and use pipe to send signals. (getevent): Eliminate. (pending_signals::add): New function. (pending_signals::del): New function. (pending_signals::next): New function. (wait_sig): Eliminate all of the obsolete semaphore stuff. Use pipe to communicate and maintain a linked list of signals. * sigproc.h: Move __SIG defines here. Add __SIGPENDING. (sig_dispatch_pending): Remove "C" specifier. (sig_handle): Accept a mask argument. * thread.cc: Remove signal handling considerations throughout.
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#include "fhandler.h"
#include "pinfo.h"
#include "hires.h"
#define FACTOR (0x19db1ded53e8000LL)
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#define NSPERSEC 10000000LL
static void __stdcall timeval_to_filetime (timeval *time, FILETIME *out);
/* Cygwin internal */
static unsigned long long __stdcall
__to_clock_t (FILETIME * src, int flag)
{
unsigned long long total = ((unsigned long long) src->dwHighDateTime << 32) + ((unsigned)src->dwLowDateTime);
syscall_printf ("dwHighDateTime %u, dwLowDateTime %u", src->dwHighDateTime, src->dwLowDateTime);
/* Convert into clock ticks - the total is in 10ths of a usec. */
if (flag)
total -= FACTOR;
total /= (unsigned long long) (NSPERSEC / CLOCKS_PER_SEC);
syscall_printf ("total %08x %08x", (unsigned)(total>>32), (unsigned)(total));
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return total;
}
/* times: POSIX 4.5.2.1 */
extern "C" clock_t
times (struct tms *buf)
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{
FILETIME creation_time, exit_time, kernel_time, user_time;
if (check_null_invalid_struct_errno (buf))
return ((clock_t) -1);
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DWORD ticks = GetTickCount ();
/* Ticks is in milliseconds, convert to our ticks. Use long long to prevent
overflow. */
clock_t tc = (clock_t) ((long long) ticks * CLOCKS_PER_SEC / 1000);
if (wincap.has_get_process_times ())
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{
GetProcessTimes (hMainProc, &creation_time, &exit_time,
&kernel_time, &user_time);
syscall_printf ("ticks %d, CLOCKS_PER_SEC %d", ticks, CLOCKS_PER_SEC);
syscall_printf ("user_time %d, kernel_time %d, creation_time %d, exit_time %d",
user_time, kernel_time, creation_time, exit_time);
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buf->tms_stime = __to_clock_t (&kernel_time, 0);
buf->tms_utime = __to_clock_t (&user_time, 0);
timeval_to_filetime (&myself->rusage_children.ru_stime, &kernel_time);
buf->tms_cstime = __to_clock_t (&kernel_time, 1);
timeval_to_filetime (&myself->rusage_children.ru_utime, &user_time);
buf->tms_cutime = __to_clock_t (&user_time, 1);
}
else
/* GetProcessTimes() does not work for non-NT versions of Windows. The
return values are undefined, so instead just copy the ticks value
into utime so that clock() will work properly on these systems */
{
buf->tms_utime = tc;
buf->tms_stime = 0;
buf->tms_cstime = 0;
buf->tms_cutime = 0;
}
return tc;
}
extern "C" clock_t _times (struct tms *) __attribute__((alias ("times")));
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/* settimeofday: BSD */
extern "C" int
settimeofday (const struct timeval *tv, const struct timezone *tz)
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{
SYSTEMTIME st;
struct tm *ptm;
int res;
tz = tz; /* silence warning about unused variable */
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 / 1000;
res = !SetSystemTime (&st);
syscall_printf ("%d = settimeofday (%x, %x)", res, tv, tz);
return res;
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}
/* timezone: standards? */
extern "C" char *
timezone ()
{
#ifdef _MT_SAFE
char *b=_reent_winsup ()->timezone_buf;
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#else
static NO_COPY char b[20] = {0};
#endif
tzset ();
__small_sprintf (b,"GMT%+d:%02d", (int) (-_timezone / 3600), (int) (abs (_timezone / 60) % 60));
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return b;
}
/* Cygwin internal */
void __stdcall
totimeval (struct timeval *dst, FILETIME *src, int sub, int flag)
{
long long x = __to_clock_t (src, flag);
x *= (int) (1e6) / CLOCKS_PER_SEC; /* Turn x into usecs */
x -= (long long) sub * (int) (1e6);
dst->tv_usec = x % (long long) (1e6); /* And split */
dst->tv_sec = x / (long long) (1e6);
}
hires_ms gtod;
UINT NO_COPY hires_ms::minperiod;
/* FIXME: Make thread safe */
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extern "C" int
gettimeofday (struct timeval *tv, struct timezone *tz)
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{
static bool tzflag;
LONGLONG now = gtod.usecs (false);
if (now == (LONGLONG) -1)
return -1;
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tv->tv_sec = now / 1000000;
tv->tv_usec = now % 1000000;
if (tz != NULL)
{
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if (!tzflag)
{
tzset ();
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tzflag = true;
}
tz->tz_minuteswest = _timezone / 60;
tz->tz_dsttime = _daylight;
}
return 0;
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}
extern "C" int _gettimeofday (struct timeval *, struct timezone *)
__attribute__((alias ("gettimeofday")));
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/* Cygwin internal */
void
time_t_to_filetime (time_t time_in, FILETIME *out)
{
long long x = time_in * NSPERSEC + FACTOR;
out->dwHighDateTime = x >> 32;
out->dwLowDateTime = x;
}
/* Cygwin internal */
static void __stdcall
timeval_to_filetime (timeval *time_in, FILETIME *out)
{
long long x = time_in->tv_sec * NSPERSEC +
time_in->tv_usec * (NSPERSEC/1000000) + FACTOR;
out->dwHighDateTime = x >> 32;
out->dwLowDateTime = x;
}
/* 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 */
/* Convert a Win32 time to "UNIX" format. */
long __stdcall
to_time_t (FILETIME *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. */
long long x = ((long long) ptr->dwHighDateTime << 32) + ((unsigned)ptr->dwLowDateTime);
/* pass "no time" as epoch */
if (x == 0)
return 0;
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x -= FACTOR; /* number of 100ns between 1601 and 1970 */
x /= (long long) NSPERSEC; /* number of 100ns in a second */
return x;
}
/* Cygwin internal */
/* Convert a Win32 time to "UNIX" timestruc_t format. */
void __stdcall
to_timestruc_t (FILETIME *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. */
long rem;
long long x = ((long long) ptr->dwHighDateTime << 32) + ((unsigned)ptr->dwLowDateTime);
/* 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 */
rem = x % ((long long)NSPERSEC);
x /= (long long) NSPERSEC; /* number of 100ns in a second */
out->tv_nsec = rem * 100; /* as tv_nsec is in nanoseconds */
out->tv_sec = x;
}
/* Cygwin internal */
/* Get the current time as a "UNIX" timestruc_t format. */
void __stdcall
time_as_timestruc_t (timestruc_t * out)
{
SYSTEMTIME systemtime;
FILETIME filetime;
GetSystemTime (&systemtime);
SystemTimeToFileTime (&systemtime, &filetime);
to_timestruc_t (&filetime, out);
}
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/* 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
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time (time_t * ptr)
{
time_t res;
SYSTEMTIME systemtime;
FILETIME filetime;
GetSystemTime (&systemtime);
SystemTimeToFileTime (&systemtime, &filetime);
res = to_time_t (&filetime);
if (ptr)
*ptr = res;
syscall_printf ("%d = time (%x)", res, ptr);
return res;
}
/*
* localtime_r.c
* Original Author: Adapted from tzcode maintained by Arthur David Olson.
*
* Converts the calendar time pointed to by tim_p into a broken-down time
* expressed as local time. Returns a pointer to a structure containing the
* broken-down time.
*/
#define SECSPERMIN 60
#define MINSPERHOUR 60
#define HOURSPERDAY 24
#define SECSPERHOUR (SECSPERMIN * MINSPERHOUR)
#define SECSPERDAY (SECSPERHOUR * HOURSPERDAY)
#define DAYSPERWEEK 7
#define MONSPERYEAR 12
#define YEAR_BASE 1900
#define EPOCH_YEAR 1970
#define EPOCH_WDAY 4
#define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0)
#if 0 /* POSIX_LOCALTIME */
static _CONST int mon_lengths[2][MONSPERYEAR] = {
{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
{31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
};
static _CONST int year_lengths[2] = {
365,
366
};
/*
* Convert a time_t into a struct tm *.
* Does NO timezone conversion.
*/
/* Cygwin internal */
static struct tm * __stdcall
corelocaltime (const time_t * tim_p)
{
long days, rem;
int y;
int yleap;
_CONST int *ip;
#ifdef _MT_SAFE
struct tm &localtime_buf=_reent_winsup ()->_localtime_buf;
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#else
static NO_COPY struct tm localtime_buf = {0};
#endif
time_t tim = *tim_p;
struct tm *res = &localtime_buf;
days = ((long) tim) / SECSPERDAY;
rem = ((long) tim) % SECSPERDAY;
while (rem < 0)
{
rem += SECSPERDAY;
--days;
}
while (rem >= SECSPERDAY)
{
rem -= SECSPERDAY;
++days;
}
/* compute hour, min, and sec */
res->tm_hour = (int) (rem / SECSPERHOUR);
rem %= SECSPERHOUR;
res->tm_min = (int) (rem / SECSPERMIN);
res->tm_sec = (int) (rem % SECSPERMIN);
/* compute day of week */
if ((res->tm_wday = ((EPOCH_WDAY + days) % DAYSPERWEEK)) < 0)
res->tm_wday += DAYSPERWEEK;
/* compute year & day of year */
y = EPOCH_YEAR;
if (days >= 0)
{
for (;;)
{
yleap = isleap (y);
if (days < year_lengths[yleap])
break;
y++;
days -= year_lengths[yleap];
}
}
else
{
do
{
--y;
yleap = isleap (y);
days += year_lengths[yleap];
} while (days < 0);
}
res->tm_year = y - YEAR_BASE;
res->tm_yday = days;
ip = mon_lengths[yleap];
for (res->tm_mon = 0; days >= ip[res->tm_mon]; ++res->tm_mon)
days -= ip[res->tm_mon];
res->tm_mday = days + 1;
/* set daylight saving time flag */
res->tm_isdst = -1;
syscall_printf ("%d = corelocaltime (%x)", res, tim_p);
return (res);
}
/* localtime: POSIX 8.1.1, C 4.12.3.4 */
/*
* localtime takes a time_t (which is in UTC)
* and formats it into a struct tm as a local time.
*/
extern "C" struct tm *
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localtime (const time_t *tim_p)
{
time_t tim = *tim_p;
struct tm *rtm;
tzset ();
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tim -= _timezone;
rtm = corelocaltime (&tim);
rtm->tm_isdst = _daylight;
syscall_printf ("%x = localtime (%x)", rtm, tim_p);
return rtm;
}
/* gmtime: C 4.12.3.3 */
/*
* gmtime takes a time_t (which is already in UTC)
* and just puts it into a struct tm.
*/
extern "C" struct tm *
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gmtime (const time_t *tim_p)
{
time_t tim = *tim_p;
struct tm *rtm = corelocaltime (&tim);
/* UTC has no daylight savings time */
rtm->tm_isdst = 0;
syscall_printf ("%x = gmtime (%x)", rtm, tim_p);
return rtm;
}
#endif /* POSIX_LOCALTIME */
/* utimes: standards? */
extern "C" int
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utimes (const char *path, struct timeval *tvp)
{
int res = 0;
struct timeval tmp[2];
path_conv win32 (path);
if (win32.error)
{
set_errno (win32.error);
syscall_printf ("-1 = utimes (%s, %x)", path, tvp);
return -1;
}
/* MSDN suggests using FILE_FLAG_BACKUP_SEMANTICS for accessing
the times of directories. */
/* Note: It's not documented in MSDN that FILE_WRITE_ATTRIBUTES is
sufficient to change the timestamps... */
HANDLE h = CreateFile (win32, FILE_WRITE_ATTRIBUTES,
FILE_SHARE_READ | FILE_SHARE_WRITE,
&sec_none_nih, OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_BACKUP_SEMANTICS,
0);
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if (h == INVALID_HANDLE_VALUE)
{
if (win32.isdir ())
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{
/* What we can do with directories more? */
res = 0;
}
else
{
res = -1;
__seterrno ();
}
}
else
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{
if (tvp == 0)
{
gettimeofday (&tmp[0], 0);
tmp[1] = tmp[0];
tvp = tmp;
}
FILETIME lastaccess;
FILETIME lastwrite;
timeval_to_filetime (tvp + 0, &lastaccess);
timeval_to_filetime (tvp + 1, &lastwrite);
debug_printf ("incoming lastaccess %08x %08x",
tvp->tv_sec,
tvp->tv_usec);
// dump_filetime (lastaccess);
// dump_filetime (lastwrite);
/* FIXME: SetFileTime needs a handle with a write lock
on the file whose time is being modified. So calls to utime()
fail for read only files. */
if (!SetFileTime (h, 0, &lastaccess, &lastwrite))
{
__seterrno ();
res = -1;
}
else
res = 0;
CloseHandle (h);
}
syscall_printf ("%d = utimes (%s, %x); (h%d)",
res, path, tvp, h);
return res;
}
/* utime: POSIX 5.6.6.1 */
extern "C" int
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utime (const char *path, struct utimbuf *buf)
{
struct timeval tmp[2];
if (buf == 0)
return utimes (path, 0);
debug_printf ("incoming utime act %x", 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
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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;
}
/* obsolete, changed to cygwin_tzset when localtime.c was added - dj */
extern "C" void
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cygwin_tzset ()
{
}
void
hires_us::prime ()
{
LARGE_INTEGER ifreq;
if (!QueryPerformanceFrequency (&ifreq))
{
inited = -1;
return;
}
FILETIME f;
int priority = GetThreadPriority (GetCurrentThread ());
SetThreadPriority (GetCurrentThread (), THREAD_PRIORITY_TIME_CRITICAL);
if (!QueryPerformanceCounter (&primed_pc))
{
SetThreadPriority (GetCurrentThread (), priority);
inited = -1;
return;
}
GetSystemTimeAsFileTime (&f);
SetThreadPriority (GetCurrentThread (), priority);
inited = 1;
primed_ft.HighPart = f.dwHighDateTime;
primed_ft.LowPart = f.dwLowDateTime;
primed_ft.QuadPart -= FACTOR;
primed_ft.QuadPart /= 10;
freq = (double) ((double) 1000000. / (double) ifreq.QuadPart);
return;
}
LONGLONG
hires_us::usecs (bool justdelta)
{
if (!inited)
prime ();
if (inited < 0)
{
set_errno (ENOSYS);
return (long long) -1;
}
LARGE_INTEGER now;
if (!QueryPerformanceCounter (&now))
{
set_errno (ENOSYS);
return -1;
}
// FIXME: Use round() here?
now.QuadPart = (LONGLONG) (freq * (double) (now.QuadPart - primed_pc.QuadPart));
return justdelta ? now.QuadPart : primed_ft.QuadPart + now.QuadPart;
}
UINT
hires_ms::prime ()
{
TIMECAPS tc;
FILETIME f;
if (!minperiod)
if (timeGetDevCaps (&tc, sizeof (tc)) != TIMERR_NOERROR)
minperiod = 1;
else
{
minperiod = min (max (tc.wPeriodMin, 1), tc.wPeriodMax);
timeBeginPeriod (minperiod);
}
if (!inited)
{
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;
}
return minperiod;
}
LONGLONG
hires_ms::usecs (bool justdelta)
{
if (!minperiod) /* NO_COPY variable */
prime ();
DWORD now = timeGetTime ();
// FIXME: Not sure how this will handle the 49.71 day wrap around
LONGLONG res = initime_us.QuadPart + ((LONGLONG) (now - initime_ms) * 1000);
return res;
}