/
HiRes.xs
1556 lines (1331 loc) · 43 KB
/
HiRes.xs
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/*
*
* Copyright (c) 1996-2002 Douglas E. Wegscheid. All rights reserved.
*
* Copyright (c) 2002-2010 Jarkko Hietaniemi.
* All rights reserved.
*
* Copyright (C) 2011, 2012, 2013 Andrew Main (Zefram) <zefram@fysh.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the same terms as Perl itself.
*/
#if defined(__MINGW32__)
/* This hides clock_gettime() and friends to avoid conflicts with our own
* implementation. This is especially important in the case of modern versions
* of MinGW.org which define clockid_t as an opaque pointer.
* Both MinGW.org and MinGW-w64 honor this flag. */
#undef _POSIX_C_SOURCE
#define _POSIX_C_SOURCE 1L
#endif
#ifdef __cplusplus
extern "C" {
#endif
#define PERL_NO_GET_CONTEXT
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#include "reentr.h"
#ifdef USE_PPPORT_H
# include "ppport.h"
#endif
#if defined(__CYGWIN__) && defined(HAS_W32API_WINDOWS_H)
# include <w32api/windows.h>
# define CYGWIN_WITH_W32API
#endif
#ifdef WIN32
# include <time.h>
#else
# include <sys/time.h>
#endif
#ifdef HAS_SELECT
# ifdef I_SYS_SELECT
# include <sys/select.h>
# endif
#endif
#if defined(TIME_HIRES_CLOCK_GETTIME_SYSCALL) || defined(TIME_HIRES_CLOCK_GETRES_SYSCALL)
# include <syscall.h>
#endif
#ifdef __cplusplus
}
#endif
#ifndef GCC_DIAG_IGNORE
# define GCC_DIAG_IGNORE(x)
# define GCC_DIAG_RESTORE
#endif
#ifndef GCC_DIAG_IGNORE_STMT
# define GCC_DIAG_IGNORE_STMT(x) GCC_DIAG_IGNORE(x) NOOP
# define GCC_DIAG_RESTORE_STMT GCC_DIAG_RESTORE NOOP
#endif
#if PERL_VERSION_GE(5,7,3) && !PERL_VERSION_GE(5,10,1)
# undef SAVEOP
# define SAVEOP() SAVEVPTR(PL_op)
#endif
#define IV_1E6 1000000
#define IV_1E7 10000000
#define IV_1E9 1000000000
#define NV_1E6 1000000.0
#define NV_1E7 10000000.0
#define NV_1E9 1000000000.0
#ifndef PerlProc_pause
# define PerlProc_pause() Pause()
#endif
#ifdef HAS_PAUSE
# define Pause pause
#else
# undef Pause /* In case perl.h did it already. */
# define Pause() sleep(~0) /* Zzz for a long time. */
#endif
/* Though the cpp define ITIMER_VIRTUAL is available the functionality
* is not supported in Cygwin as of August 2004, ditto for Win32.
* Neither are ITIMER_PROF or ITIMER_REALPROF implemented. --jhi
*/
#if defined(__CYGWIN__) || defined(WIN32)
# undef ITIMER_VIRTUAL
# undef ITIMER_PROF
# undef ITIMER_REALPROF
#endif
#ifndef TIME_HIRES_CLOCKID_T
typedef int clockid_t;
#endif
#if defined(TIME_HIRES_CLOCK_GETTIME) && defined(_STRUCT_ITIMERSPEC)
/* HP-UX has CLOCK_XXX values but as enums, not as defines.
* The only way to detect these would be to test compile for each. */
# ifdef __hpux
/* However, it seems that at least in HP-UX 11.31 ia64 there *are*
* defines for these, so let's try detecting them. */
# ifndef CLOCK_REALTIME
# define CLOCK_REALTIME CLOCK_REALTIME
# define CLOCK_VIRTUAL CLOCK_VIRTUAL
# define CLOCK_PROFILE CLOCK_PROFILE
# endif
# endif /* # ifdef __hpux */
#endif /* #if defined(TIME_HIRES_CLOCK_GETTIME) && defined(_STRUCT_ITIMERSPEC) */
#if defined(WIN32) || defined(CYGWIN_WITH_W32API)
# ifndef HAS_GETTIMEOFDAY
# define HAS_GETTIMEOFDAY
# endif
/* shows up in winsock.h?
struct timeval {
long tv_sec;
long tv_usec;
}
*/
typedef union {
unsigned __int64 ft_i64;
FILETIME ft_val;
} FT_t;
# define MY_CXT_KEY "Time::HiRes_" XS_VERSION
typedef struct {
unsigned long run_count;
unsigned __int64 base_ticks;
unsigned __int64 tick_frequency;
FT_t base_systime_as_filetime;
unsigned __int64 reset_time;
} my_cxt_t;
/* Visual C++ 2013 and older don't have the timespec structure.
* Neither do mingw.org compilers with MinGW runtimes older than 3.22. */
# if((defined(_MSC_VER) && _MSC_VER < 1900) || \
(defined(__MINGW32__) && !defined(__MINGW64_VERSION_MAJOR) && \
defined(__MINGW32_MAJOR_VERSION) && (__MINGW32_MAJOR_VERSION < 3 || \
(__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION < 22))))
struct timespec {
time_t tv_sec;
long tv_nsec;
};
# endif
START_MY_CXT
/* Number of 100 nanosecond units from 1/1/1601 to 1/1/1970 */
# ifdef __GNUC__
# define Const64(x) x##LL
# else
# define Const64(x) x##i64
# endif
# define EPOCH_BIAS Const64(116444736000000000)
# ifdef Const64
# ifdef __GNUC__
# define IV_1E6LL 1000000LL /* Needed because of Const64() ##-appends LL (or i64). */
# define IV_1E7LL 10000000LL
# define IV_1E9LL 1000000000LL
# else
# define IV_1E6i64 1000000i64
# define IV_1E7i64 10000000i64
# define IV_1E9i64 1000000000i64
# endif
# endif
/* NOTE: This does not compute the timezone info (doing so can be expensive,
* and appears to be unsupported even by glibc) */
/* dMY_CXT needs a Perl context and we don't want to call PERL_GET_CONTEXT
for performance reasons */
# undef gettimeofday
# define gettimeofday(tp, not_used) _gettimeofday(aTHX_ tp, not_used)
# undef GetSystemTimePreciseAsFileTime
# define GetSystemTimePreciseAsFileTime(out) _GetSystemTimePreciseAsFileTime(aTHX_ out)
# undef clock_gettime
# define clock_gettime(clock_id, tp) _clock_gettime(aTHX_ clock_id, tp)
# undef clock_getres
# define clock_getres(clock_id, tp) _clock_getres(clock_id, tp)
# ifndef CLOCK_REALTIME
# define CLOCK_REALTIME 1
# define CLOCK_MONOTONIC 2
# endif
/* If the performance counter delta drifts more than 0.5 seconds from the
* system time then we recalibrate to the system time. This means we may
* move *backwards* in time! */
# define MAX_PERF_COUNTER_SKEW Const64(5000000) /* 0.5 seconds */
/* Reset reading from the performance counter every five minutes.
* Many PC clocks just seem to be so bad. */
# define MAX_PERF_COUNTER_TICKS Const64(300000000) /* 300 seconds */
/*
* Windows 8 introduced GetSystemTimePreciseAsFileTime(), but currently we have
* to support older systems, so for now we provide our own implementation.
* In the future we will switch to the real deal.
*/
static void
_GetSystemTimePreciseAsFileTime(pTHX_ FILETIME *out)
{
dMY_CXT;
FT_t ft;
if (MY_CXT.run_count++ == 0 ||
MY_CXT.base_systime_as_filetime.ft_i64 > MY_CXT.reset_time) {
QueryPerformanceFrequency((LARGE_INTEGER*)&MY_CXT.tick_frequency);
QueryPerformanceCounter((LARGE_INTEGER*)&MY_CXT.base_ticks);
GetSystemTimeAsFileTime(&MY_CXT.base_systime_as_filetime.ft_val);
ft.ft_i64 = MY_CXT.base_systime_as_filetime.ft_i64;
MY_CXT.reset_time = ft.ft_i64 + MAX_PERF_COUNTER_TICKS;
}
else {
__int64 diff;
unsigned __int64 ticks;
QueryPerformanceCounter((LARGE_INTEGER*)&ticks);
ticks -= MY_CXT.base_ticks;
ft.ft_i64 = MY_CXT.base_systime_as_filetime.ft_i64
+ Const64(IV_1E7) * (ticks / MY_CXT.tick_frequency)
+(Const64(IV_1E7) * (ticks % MY_CXT.tick_frequency)) / MY_CXT.tick_frequency;
diff = ft.ft_i64 - MY_CXT.base_systime_as_filetime.ft_i64;
if (diff < -MAX_PERF_COUNTER_SKEW || diff > MAX_PERF_COUNTER_SKEW) {
MY_CXT.base_ticks += ticks;
GetSystemTimeAsFileTime(&MY_CXT.base_systime_as_filetime.ft_val);
ft.ft_i64 = MY_CXT.base_systime_as_filetime.ft_i64;
}
}
*out = ft.ft_val;
return;
}
static int
_gettimeofday(pTHX_ struct timeval *tp, void *not_used)
{
FT_t ft;
PERL_UNUSED_ARG(not_used);
GetSystemTimePreciseAsFileTime(&ft.ft_val);
/* seconds since epoch */
tp->tv_sec = (long)((ft.ft_i64 - EPOCH_BIAS) / Const64(IV_1E7));
/* microseconds remaining */
tp->tv_usec = (long)((ft.ft_i64 / Const64(10)) % Const64(IV_1E6));
return 0;
}
static int
_clock_gettime(pTHX_ clockid_t clock_id, struct timespec *tp)
{
FT_t ft;
switch (clock_id) {
case CLOCK_REALTIME: {
FT_t ft;
GetSystemTimePreciseAsFileTime(&ft.ft_val);
tp->tv_sec = (time_t)((ft.ft_i64 - EPOCH_BIAS) / IV_1E7);
tp->tv_nsec = (long)((ft.ft_i64 % IV_1E7) * 100);
break;
}
case CLOCK_MONOTONIC: {
unsigned __int64 freq, ticks;
QueryPerformanceFrequency((LARGE_INTEGER*)&freq);
QueryPerformanceCounter((LARGE_INTEGER*)&ticks);
tp->tv_sec = (time_t)(ticks / freq);
tp->tv_nsec = (long)((IV_1E9 * (ticks % freq)) / freq);
break;
}
default:
errno = EINVAL;
return 1;
}
return 0;
}
static int
_clock_getres(clockid_t clock_id, struct timespec *tp)
{
unsigned __int64 freq, qpc_res_ns;
QueryPerformanceFrequency((LARGE_INTEGER*)&freq);
qpc_res_ns = IV_1E9 > freq ? IV_1E9 / freq : 1;
switch (clock_id) {
case CLOCK_REALTIME:
tp->tv_sec = 0;
/* the resolution can't be smaller than 100ns because our implementation
* of CLOCK_REALTIME is using FILETIME internally */
tp->tv_nsec = (long)(qpc_res_ns > 100 ? qpc_res_ns : 100);
break;
case CLOCK_MONOTONIC:
tp->tv_sec = 0;
tp->tv_nsec = (long)qpc_res_ns;
break;
default:
errno = EINVAL;
return 1;
}
return 0;
}
#endif /* #if defined(WIN32) || defined(CYGWIN_WITH_W32API) */
/* Do not use H A S _ N A N O S L E E P
* so that Perl Configure doesn't scan for it (and pull in -lrt and
* the like which are not usually good ideas for the default Perl).
* (We are part of the core perl now.)
* The TIME_HIRES_NANOSLEEP is set by Makefile.PL. */
#if !defined(HAS_USLEEP) && defined(TIME_HIRES_NANOSLEEP)
# define HAS_USLEEP
# define usleep hrt_usleep /* could conflict with ncurses for static build */
static void
hrt_usleep(unsigned long usec) /* This is used to emulate usleep. */
{
struct timespec res;
res.tv_sec = usec / IV_1E6;
res.tv_nsec = ( usec - res.tv_sec * IV_1E6 ) * 1000;
nanosleep(&res, NULL);
}
#endif /* #if !defined(HAS_USLEEP) && defined(TIME_HIRES_NANOSLEEP) */
#if !defined(HAS_USLEEP) && defined(HAS_SELECT)
# ifndef SELECT_IS_BROKEN
# define HAS_USLEEP
# define usleep hrt_usleep /* could conflict with ncurses for static build */
static void
hrt_usleep(unsigned long usec)
{
struct timeval tv;
tv.tv_sec = 0;
tv.tv_usec = usec;
select(0, (Select_fd_set_t)NULL, (Select_fd_set_t)NULL,
(Select_fd_set_t)NULL, &tv);
}
# endif
#endif /* #if !defined(HAS_USLEEP) && defined(HAS_SELECT) */
#if !defined(HAS_USLEEP) && defined(WIN32)
# define HAS_USLEEP
# define usleep hrt_usleep /* could conflict with ncurses for static build */
static void
hrt_usleep(unsigned long usec)
{
long msec;
msec = usec / 1000;
Sleep (msec);
}
#endif /* #if !defined(HAS_USLEEP) && defined(WIN32) */
#if !defined(HAS_USLEEP) && defined(HAS_POLL)
# define HAS_USLEEP
# define usleep hrt_usleep /* could conflict with ncurses for static build */
static void
hrt_usleep(unsigned long usec)
{
int msec = usec / 1000;
poll(0, 0, msec);
}
#endif /* #if !defined(HAS_USLEEP) && defined(HAS_POLL) */
#if defined(HAS_SETITIMER) && defined(ITIMER_REAL)
static int
hrt_ualarm_itimero(struct itimerval *oitv, int usec, int uinterval)
{
struct itimerval itv;
itv.it_value.tv_sec = usec / IV_1E6;
itv.it_value.tv_usec = usec % IV_1E6;
itv.it_interval.tv_sec = uinterval / IV_1E6;
itv.it_interval.tv_usec = uinterval % IV_1E6;
return setitimer(ITIMER_REAL, &itv, oitv);
}
#endif /* #if !defined(HAS_UALARM) && defined(HAS_SETITIMER) */
#if !defined(HAS_UALARM) && defined(HAS_SETITIMER)
# define HAS_UALARM
# define ualarm hrt_ualarm_itimer /* could conflict with ncurses for static build */
#endif
#if !defined(HAS_UALARM) && defined(VMS)
# define HAS_UALARM
# define ualarm vms_ualarm
# include <lib$routines.h>
# include <ssdef.h>
# include <starlet.h>
# include <descrip.h>
# include <signal.h>
# include <jpidef.h>
# include <psldef.h>
# define VMSERR(s) (!((s)&1))
static void
us_to_VMS(useconds_t mseconds, unsigned long v[])
{
int iss;
unsigned long qq[2];
qq[0] = mseconds;
qq[1] = 0;
v[0] = v[1] = 0;
iss = lib$addx(qq,qq,qq);
if (VMSERR(iss)) lib$signal(iss);
iss = lib$subx(v,qq,v);
if (VMSERR(iss)) lib$signal(iss);
iss = lib$addx(qq,qq,qq);
if (VMSERR(iss)) lib$signal(iss);
iss = lib$subx(v,qq,v);
if (VMSERR(iss)) lib$signal(iss);
iss = lib$subx(v,qq,v);
if (VMSERR(iss)) lib$signal(iss);
}
static int
VMS_to_us(unsigned long v[])
{
int iss;
unsigned long div=10,quot, rem;
iss = lib$ediv(&div,v,",&rem);
if (VMSERR(iss)) lib$signal(iss);
return quot;
}
typedef unsigned short word;
typedef struct _ualarm {
int function;
int repeat;
unsigned long delay[2];
unsigned long interval[2];
unsigned long remain[2];
} Alarm;
static int alarm_ef;
static Alarm *a0, alarm_base;
# define UAL_NULL 0
# define UAL_SET 1
# define UAL_CLEAR 2
# define UAL_ACTIVE 4
static void ualarm_AST(Alarm *a);
static int
vms_ualarm(int mseconds, int interval)
{
Alarm *a, abase;
struct item_list3 {
word length;
word code;
void *bufaddr;
void *retlenaddr;
} ;
static struct item_list3 itmlst[2];
static int first = 1;
unsigned long asten;
int iss, enabled;
if (first) {
first = 0;
itmlst[0].code = JPI$_ASTEN;
itmlst[0].length = sizeof(asten);
itmlst[0].retlenaddr = NULL;
itmlst[1].code = 0;
itmlst[1].length = 0;
itmlst[1].bufaddr = NULL;
itmlst[1].retlenaddr = NULL;
iss = lib$get_ef(&alarm_ef);
if (VMSERR(iss)) lib$signal(iss);
a0 = &alarm_base;
a0->function = UAL_NULL;
}
itmlst[0].bufaddr = &asten;
iss = sys$getjpiw(0,0,0,itmlst,0,0,0);
if (VMSERR(iss)) lib$signal(iss);
if (!(asten&0x08)) return -1;
a = &abase;
if (mseconds) {
a->function = UAL_SET;
} else {
a->function = UAL_CLEAR;
}
us_to_VMS(mseconds, a->delay);
if (interval) {
us_to_VMS(interval, a->interval);
a->repeat = 1;
} else
a->repeat = 0;
iss = sys$clref(alarm_ef);
if (VMSERR(iss)) lib$signal(iss);
iss = sys$dclast(ualarm_AST,a,0);
if (VMSERR(iss)) lib$signal(iss);
iss = sys$waitfr(alarm_ef);
if (VMSERR(iss)) lib$signal(iss);
if (a->function == UAL_ACTIVE)
return VMS_to_us(a->remain);
else
return 0;
}
static void
ualarm_AST(Alarm *a)
{
int iss;
unsigned long now[2];
iss = sys$gettim(now);
if (VMSERR(iss)) lib$signal(iss);
if (a->function == UAL_SET || a->function == UAL_CLEAR) {
if (a0->function == UAL_ACTIVE) {
iss = sys$cantim(a0,PSL$C_USER);
if (VMSERR(iss)) lib$signal(iss);
iss = lib$subx(a0->remain, now, a->remain);
if (VMSERR(iss)) lib$signal(iss);
if (a->remain[1] & 0x80000000)
a->remain[0] = a->remain[1] = 0;
}
if (a->function == UAL_SET) {
a->function = a0->function;
a0->function = UAL_ACTIVE;
a0->repeat = a->repeat;
if (a0->repeat) {
a0->interval[0] = a->interval[0];
a0->interval[1] = a->interval[1];
}
a0->delay[0] = a->delay[0];
a0->delay[1] = a->delay[1];
iss = lib$subx(now, a0->delay, a0->remain);
if (VMSERR(iss)) lib$signal(iss);
iss = sys$setimr(0,a0->delay,ualarm_AST,a0);
if (VMSERR(iss)) lib$signal(iss);
} else {
a->function = a0->function;
a0->function = UAL_NULL;
}
iss = sys$setef(alarm_ef);
if (VMSERR(iss)) lib$signal(iss);
} else if (a->function == UAL_ACTIVE) {
if (a->repeat) {
iss = lib$subx(now, a->interval, a->remain);
if (VMSERR(iss)) lib$signal(iss);
iss = sys$setimr(0,a->interval,ualarm_AST,a);
if (VMSERR(iss)) lib$signal(iss);
} else {
a->function = UAL_NULL;
}
iss = sys$wake(0,0);
if (VMSERR(iss)) lib$signal(iss);
lib$signal(SS$_ASTFLT);
} else {
lib$signal(SS$_BADPARAM);
}
}
#endif /* #if !defined(HAS_UALARM) && defined(VMS) */
#ifdef HAS_GETTIMEOFDAY
static int
myU2time(pTHX_ UV *ret)
{
struct timeval Tp;
int status;
status = gettimeofday (&Tp, NULL);
ret[0] = Tp.tv_sec;
ret[1] = Tp.tv_usec;
return status;
}
static NV
myNVtime()
{
# ifdef WIN32
dTHX;
# endif
struct timeval Tp;
int status;
status = gettimeofday (&Tp, NULL);
return status == 0 ? Tp.tv_sec + (Tp.tv_usec / NV_1E6) : -1.0;
}
#endif /* #ifdef HAS_GETTIMEOFDAY */
static void
hrstatns(UV *atime_nsec, UV *mtime_nsec, UV *ctime_nsec)
{
dTHX;
#if TIME_HIRES_STAT == 1
*atime_nsec = PL_statcache.st_atimespec.tv_nsec;
*mtime_nsec = PL_statcache.st_mtimespec.tv_nsec;
*ctime_nsec = PL_statcache.st_ctimespec.tv_nsec;
#elif TIME_HIRES_STAT == 2
*atime_nsec = PL_statcache.st_atimensec;
*mtime_nsec = PL_statcache.st_mtimensec;
*ctime_nsec = PL_statcache.st_ctimensec;
#elif TIME_HIRES_STAT == 3
*atime_nsec = PL_statcache.st_atime_n;
*mtime_nsec = PL_statcache.st_mtime_n;
*ctime_nsec = PL_statcache.st_ctime_n;
#elif TIME_HIRES_STAT == 4
*atime_nsec = PL_statcache.st_atim.tv_nsec;
*mtime_nsec = PL_statcache.st_mtim.tv_nsec;
*ctime_nsec = PL_statcache.st_ctim.tv_nsec;
#elif TIME_HIRES_STAT == 5
*atime_nsec = PL_statcache.st_uatime * 1000;
*mtime_nsec = PL_statcache.st_umtime * 1000;
*ctime_nsec = PL_statcache.st_uctime * 1000;
#else /* !TIME_HIRES_STAT */
*atime_nsec = 0;
*mtime_nsec = 0;
*ctime_nsec = 0;
#endif /* !TIME_HIRES_STAT */
}
/* Until Apple implements clock_gettime()
* (ditto clock_getres() and clock_nanosleep())
* we will emulate them using the Mach kernel interfaces. */
#if defined(PERL_DARWIN) && \
(defined(TIME_HIRES_CLOCK_GETTIME_EMULATION) || \
defined(TIME_HIRES_CLOCK_GETRES_EMULATION) || \
defined(TIME_HIRES_CLOCK_NANOSLEEP_EMULATION))
# ifndef CLOCK_REALTIME
# define CLOCK_REALTIME 0x01
# define CLOCK_MONOTONIC 0x02
# endif
# ifndef TIMER_ABSTIME
# define TIMER_ABSTIME 0x01
# endif
# ifdef USE_ITHREADS
# define PERL_DARWIN_MUTEX
# endif
# ifdef PERL_DARWIN_MUTEX
STATIC perl_mutex darwin_time_mutex;
# endif
# include <mach/mach_time.h>
static uint64_t absolute_time_init;
static mach_timebase_info_data_t timebase_info;
static struct timespec timespec_init;
static int darwin_time_init() {
struct timeval tv;
int success = 1;
# ifdef PERL_DARWIN_MUTEX
MUTEX_LOCK(&darwin_time_mutex);
# endif
if (absolute_time_init == 0) {
/* mach_absolute_time() cannot fail */
absolute_time_init = mach_absolute_time();
success = mach_timebase_info(&timebase_info) == KERN_SUCCESS;
if (success) {
success = gettimeofday(&tv, NULL) == 0;
if (success) {
timespec_init.tv_sec = tv.tv_sec;
timespec_init.tv_nsec = tv.tv_usec * 1000;
}
}
}
# ifdef PERL_DARWIN_MUTEX
MUTEX_UNLOCK(&darwin_time_mutex);
# endif
return success;
}
# ifdef TIME_HIRES_CLOCK_GETTIME_EMULATION
static int th_clock_gettime(clockid_t clock_id, struct timespec *ts) {
if (darwin_time_init() && timebase_info.denom) {
switch (clock_id) {
case CLOCK_REALTIME:
{
uint64_t nanos =
((mach_absolute_time() - absolute_time_init) *
(uint64_t)timebase_info.numer) / (uint64_t)timebase_info.denom;
ts->tv_sec = timespec_init.tv_sec + nanos / IV_1E9;
ts->tv_nsec = timespec_init.tv_nsec + nanos % IV_1E9;
return 0;
}
case CLOCK_MONOTONIC:
{
uint64_t nanos =
(mach_absolute_time() *
(uint64_t)timebase_info.numer) / (uint64_t)timebase_info.denom;
ts->tv_sec = nanos / IV_1E9;
ts->tv_nsec = nanos - ts->tv_sec * IV_1E9;
return 0;
}
default:
break;
}
}
SETERRNO(EINVAL, LIB_INVARG);
return -1;
}
# define clock_gettime(clock_id, ts) th_clock_gettime((clock_id), (ts))
# endif /* TIME_HIRES_CLOCK_GETTIME_EMULATION */
# ifdef TIME_HIRES_CLOCK_GETRES_EMULATION
static int th_clock_getres(clockid_t clock_id, struct timespec *ts) {
if (darwin_time_init() && timebase_info.denom) {
switch (clock_id) {
case CLOCK_REALTIME:
case CLOCK_MONOTONIC:
ts->tv_sec = 0;
/* In newer kernels both the numer and denom are one,
* resulting in conversion factor of one, which is of
* course unrealistic. */
ts->tv_nsec = timebase_info.numer / timebase_info.denom;
return 0;
default:
break;
}
}
SETERRNO(EINVAL, LIB_INVARG);
return -1;
}
# define clock_getres(clock_id, ts) th_clock_getres((clock_id), (ts))
# endif /* TIME_HIRES_CLOCK_GETRES_EMULATION */
# ifdef TIME_HIRES_CLOCK_NANOSLEEP_EMULATION
static int th_clock_nanosleep(clockid_t clock_id, int flags,
const struct timespec *rqtp,
struct timespec *rmtp) {
if (darwin_time_init()) {
switch (clock_id) {
case CLOCK_REALTIME:
case CLOCK_MONOTONIC:
{
uint64_t nanos = rqtp->tv_sec * IV_1E9 + rqtp->tv_nsec;
int success;
if ((flags & TIMER_ABSTIME)) {
uint64_t back =
timespec_init.tv_sec * IV_1E9 + timespec_init.tv_nsec;
nanos = nanos > back ? nanos - back : 0;
}
success =
mach_wait_until(mach_absolute_time() + nanos) == KERN_SUCCESS;
/* In the relative sleep, the rmtp should be filled in with
* the 'unused' part of the rqtp in case the sleep gets
* interrupted by a signal. But it is unknown how signals
* interact with mach_wait_until(). In the absolute sleep,
* the rmtp should stay untouched. */
rmtp->tv_sec = 0;
rmtp->tv_nsec = 0;
return success;
}
default:
break;
}
}
SETERRNO(EINVAL, LIB_INVARG);
return -1;
}
# define clock_nanosleep(clock_id, flags, rqtp, rmtp) \
th_clock_nanosleep((clock_id), (flags), (rqtp), (rmtp))
# endif /* TIME_HIRES_CLOCK_NANOSLEEP_EMULATION */
#endif /* PERL_DARWIN */
/* The macOS headers warn about using certain interfaces in
* OS-release-ignorant manner, for example:
*
* warning: 'futimens' is only available on macOS 10.13 or newer
* [-Wunguarded-availability-new]
*
* (ditto for utimensat)
*
* There is clang __builtin_available() *runtime* check for this.
* The gotchas are that neither __builtin_available() nor __has_builtin()
* are always available.
*/
#ifndef __has_builtin
# define __has_builtin(x) 0 /* non-clang */
#endif
#ifdef HAS_FUTIMENS
# if defined(PERL_DARWIN) && __has_builtin(__builtin_available)
# define FUTIMENS_AVAILABLE __builtin_available(macOS 10.13, *)
# else
# define FUTIMENS_AVAILABLE 1
# endif
#else
# define FUTIMENS_AVAILABLE 0
#endif
#ifdef HAS_UTIMENSAT
# if defined(PERL_DARWIN) && __has_builtin(__builtin_available)
# define UTIMENSAT_AVAILABLE __builtin_available(macOS 10.13, *)
# else
# define UTIMENSAT_AVAILABLE 1
# endif
#else
# define UTIMENSAT_AVAILABLE 0
#endif
#include "const-c.inc"
#if (defined(TIME_HIRES_NANOSLEEP)) || \
(defined(TIME_HIRES_CLOCK_NANOSLEEP) && defined(TIMER_ABSTIME))
static void
nanosleep_init(NV nsec,
struct timespec *sleepfor,
struct timespec *unslept) {
sleepfor->tv_sec = (Time_t)(nsec / NV_1E9);
sleepfor->tv_nsec = (long)(nsec - ((NV)sleepfor->tv_sec) * NV_1E9);
unslept->tv_sec = 0;
unslept->tv_nsec = 0;
}
static NV
nsec_without_unslept(struct timespec *sleepfor,
const struct timespec *unslept) {
if (sleepfor->tv_sec >= unslept->tv_sec) {
sleepfor->tv_sec -= unslept->tv_sec;
if (sleepfor->tv_nsec >= unslept->tv_nsec) {
sleepfor->tv_nsec -= unslept->tv_nsec;
} else if (sleepfor->tv_sec > 0) {
sleepfor->tv_sec--;
sleepfor->tv_nsec += IV_1E9;
sleepfor->tv_nsec -= unslept->tv_nsec;
} else {
sleepfor->tv_sec = 0;
sleepfor->tv_nsec = 0;
}
} else {
sleepfor->tv_sec = 0;
sleepfor->tv_nsec = 0;
}
return ((NV)sleepfor->tv_sec) * NV_1E9 + ((NV)sleepfor->tv_nsec);
}
#endif
/* In case Perl and/or Devel::PPPort are too old, minimally emulate
* IS_SAFE_PATHNAME() (which looks for zero bytes in the pathname). */
#ifndef IS_SAFE_PATHNAME
# if PERL_VERSION_GE(5,12,0) /* Perl_ck_warner is 5.10.0 -> */
# ifdef WARN_SYSCALLS
# define WARNEMUCAT WARN_SYSCALLS /* 5.22.0 -> */
# else
# define WARNEMUCAT WARN_MISC
# endif
# define WARNEMU(opname) Perl_ck_warner(aTHX_ packWARN(WARNEMUCAT), "Invalid \\0 character in pathname for %s",opname)
# else
# define WARNEMU(opname) Perl_warn(aTHX_ "Invalid \\0 character in pathname for %s",opname)
# endif
# define IS_SAFE_PATHNAME(pv, len, opname) (((len)>1)&&memchr((pv), 0, (len)-1)?(SETERRNO(ENOENT, LIB_INVARG),WARNEMU(opname),FALSE):(TRUE))
#endif
MODULE = Time::HiRes PACKAGE = Time::HiRes
PROTOTYPES: ENABLE
BOOT:
{
#ifdef MY_CXT_KEY
MY_CXT_INIT;
#endif
#ifdef HAS_GETTIMEOFDAY
{
(void) hv_store(PL_modglobal, "Time::NVtime", 12,
newSViv(PTR2IV(myNVtime)), 0);
(void) hv_store(PL_modglobal, "Time::U2time", 12,
newSViv(PTR2IV(myU2time)), 0);
}
#endif
#if defined(PERL_DARWIN)
# if defined(USE_ITHREADS) && defined(PERL_DARWIN_MUTEX)
MUTEX_INIT(&darwin_time_mutex);
# endif
#endif
}
#if defined(USE_ITHREADS) && defined(MY_CXT_KEY)
void
CLONE(...)
CODE:
MY_CXT_CLONE;
#endif
INCLUDE: const-xs.inc
#if defined(HAS_USLEEP) && defined(HAS_GETTIMEOFDAY)
NV
usleep(useconds)
NV useconds
PREINIT:
struct timeval Ta, Tb;
CODE:
gettimeofday(&Ta, NULL);
if (items > 0) {
if (useconds >= NV_1E6) {
IV seconds = (IV) (useconds / NV_1E6);
/* If usleep() has been implemented using setitimer()
* then this contortion is unnecessary-- but usleep()
* may be implemented in some other way, so let's contort. */
if (seconds) {
sleep(seconds);
useconds -= NV_1E6 * seconds;
}
} else if (useconds < 0.0)
croak("Time::HiRes::usleep(%" NVgf
"): negative time not invented yet", useconds);
usleep((U32)useconds);
} else
PerlProc_pause();
gettimeofday(&Tb, NULL);
# if 0
printf("[%ld %ld] [%ld %ld]\n", Tb.tv_sec, Tb.tv_usec, Ta.tv_sec, Ta.tv_usec);
# endif
RETVAL = NV_1E6*(Tb.tv_sec-Ta.tv_sec)+(NV)((IV)Tb.tv_usec-(IV)Ta.tv_usec);
OUTPUT:
RETVAL
# if defined(TIME_HIRES_NANOSLEEP)
NV
nanosleep(nsec)
NV nsec
PREINIT:
struct timespec sleepfor, unslept;