newlib/winsup/cygwin/hires.h

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/* hires.h: Definitions for hires clock calculations
Copyright 2002, 2003, 2004, 2005, 2009, 2010, 2011, 2012 Red Hat, Inc.
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. */
#ifndef __HIRES_H__
#define __HIRES_H__
#include <mmsystem.h>
/* Conversions for per-process and per-thread clocks */
#define PID_TO_CLOCKID(pid) (pid * 8 + CLOCK_PROCESS_CPUTIME_ID)
#define CLOCKID_TO_PID(cid) ((cid - CLOCK_PROCESS_CPUTIME_ID) / 8)
#define CLOCKID_IS_PROCESS(cid) ((cid % 8) == CLOCK_PROCESS_CPUTIME_ID)
#define THREADID_TO_CLOCKID(tid) (tid * 8 + CLOCK_THREAD_CPUTIME_ID)
#define CLOCKID_TO_THREADID(cid) ((cid - CLOCK_THREAD_CPUTIME_ID) / 8)
#define CLOCKID_IS_THREAD(cid) ((cid % 8) == CLOCK_THREAD_CPUTIME_ID)
/* 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)
* cygtls.h (struct _local_storage): Add cw_timer member. * cygtls.cc (_cygtls::init_thread): Initialize locals.cw_timer. (_cygtls::fixup_after_fork): Ditto. * tlsoffsets.h: Regenerate. * ntdll.h (enum _TIMER_INFORMATION_CLASS): Define. (struct _TIMER_BASIC_INFORMATION): Define. (NtQueryTimer): Declare function. * thread.h (cancelable_wait): Change timeout argument to PLARGE_INTEGER and provide NULL default. (fast_mutex::lock): Adjust accordingly. (pthread_cond::wait): Change timeout argument to PLARGE_INTEGER and default to NULL. * thread.cc (cancelable_wait): Change timeout argument to PLARGE_INTEGER. Initialize _cygtls.locals.cw_timer if needed. Use NT waitable timers for handling timeout. Return remaining time to timeout argument if timeout was relative. (pthread_cond::wait): Change timeout argument to PLARGE_INTEGER. Adjust to change in cancelable_wait. (pthread_mutex::lock): Adjust to change in cancelable_wait. (pthread_spinlock::lock): Ditto. (pthread::join): Ditto. (__pthread_cond_dowait): Change waitlength argument to PLARGE_INTEGER. Adjust to changes in cancelable_wait and pthread_cond::wait. (pthread_cond_timedwait): Adjust to change in __pthread_cond_dowait. (pthread_cond_wait): Ditto. (semaphore::_timedwait): Adjust to change in cancelable_wait. (semaphore::_wait): Ditto. * exceptions.cc (handle_sigsuspend): Ditto. * signal.cc (nanosleep): Ditto. * wait.cc (wait4): Ditto. Fix copyright dates. * times.cc (FACTOR, NSPERSEC): Move from here... * hires.h (FACTOR, NSPERSEC): ...to here.
2011-08-03 18:40:48 +02:00
/* 100ns difference between Windows and UNIX timebase. */
#define FACTOR (0x19db1ded53e8000LL)
/* # of 100ns intervals per second. */
#define NSPERSEC 10000000LL
class hires_base
{
protected:
int inited;
public:
void reset() {inited = false;}
};
class hires_ns : public hires_base
{
LARGE_INTEGER primed_pc;
double freq;
void prime ();
public:
LONGLONG nsecs (bool monotonic = false);
LONGLONG usecs () {return nsecs () / 1000LL;}
LONGLONG resolution();
};
class hires_ms : public hires_base
{
LONGLONG initime_ns;
LONGLONG timeGetTime_ns ();
void prime ();
public:
LONGLONG nsecs ();
LONGLONG usecs () {return nsecs () / 10LL;}
LONGLONG msecs () {return nsecs () / 10000LL;}
UINT resolution ();
LONGLONG uptime () {return (nsecs () - initime_ns) / 10000LL;}
};
extern hires_ms gtod;
#endif /*__HIRES_H__*/