diff options
author | Yaakov Selkowitz <yselkowi@redhat.com> | 2010-08-09 20:47:48 +0400 |
---|---|---|
committer | Yaakov Selkowitz <yselkowi@redhat.com> | 2010-08-09 20:47:48 +0400 |
commit | b150f5236b5dd8318bb9fef8188517894e3f186c (patch) | |
tree | ab518fe7711d0c3867cfdb56e1eb2a7703c7377a /winsup/cygwin | |
parent | f717289618baa1a709a7b6d5d91c4904fe2426a1 (diff) |
Implement POSIX.1-2004 Monotonic Clock.
* hires.h: Change hires_us to hires_ns, with nanosecond resolution.
(hires_ns::primed_ft): Remove.
(hires_ns::nsecs): New prototype.
(hires_ns::usecs): Rewrite in terms of nsecs.
(hires_ns::resolution): New prototype.
* times.cc: Change hires_us to hires_ns.
(ntod): Declare.
(systime): Remove.
(hires_ns::prime): Increase resolution to nanoseconds.
(hires_ns::nsecs): Rename usecs to nsecs to reflect increased resolution.
Remove justdelta argument.
(hires_ns::resolution): New function.
(clock_gettime): Accept CLOCK_MONOTONIC.
Use EINVAL instead of ENOSYS per POSIX.1-2004.
(clock_getres): Ditto.
(clock_setres): Use EINVAL instead of ENOSYS to conform with other
implementations.
* strace.cc (strace::microseconds): Adjust for hires_ns.
* sysconf.cc (sca): Set _SC_MONOTONIC_CLOCK to _POSIX_MONOTONIC_CLOCK.
* include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump.
Diffstat (limited to 'winsup/cygwin')
-rw-r--r-- | winsup/cygwin/ChangeLog | 24 | ||||
-rw-r--r-- | winsup/cygwin/hires.h | 7 | ||||
-rw-r--r-- | winsup/cygwin/include/cygwin/version.h | 3 | ||||
-rw-r--r-- | winsup/cygwin/strace.cc | 4 | ||||
-rw-r--r-- | winsup/cygwin/sysconf.cc | 2 | ||||
-rw-r--r-- | winsup/cygwin/times.cc | 96 |
6 files changed, 99 insertions, 37 deletions
diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog index 3a574186b..db86952bb 100644 --- a/winsup/cygwin/ChangeLog +++ b/winsup/cygwin/ChangeLog @@ -1,5 +1,29 @@ 2010-08-09 Yaakov Selkowitz <yselkowitz@users.sourceforge.net> + Implement POSIX.1-2004 Monotonic Clock. + * hires.h: Change hires_us to hires_ns, with nanosecond resolution. + (hires_ns::primed_ft): Remove. + (hires_ns::nsecs): New prototype. + (hires_ns::usecs): Rewrite in terms of nsecs. + (hires_ns::resolution): New prototype. + * times.cc: Change hires_us to hires_ns. + (ntod): Declare. + (systime): Remove. + (hires_ns::prime): Increase resolution to nanoseconds. + (hires_ns::nsecs): Rename usecs to nsecs to reflect increased resolution. + Remove justdelta argument. + (hires_ns::resolution): New function. + (clock_gettime): Accept CLOCK_MONOTONIC. + Use EINVAL instead of ENOSYS per POSIX.1-2004. + (clock_getres): Ditto. + (clock_setres): Use EINVAL instead of ENOSYS to conform with other + implementations. + * strace.cc (strace::microseconds): Adjust for hires_ns. + * sysconf.cc (sca): Set _SC_MONOTONIC_CLOCK to _POSIX_MONOTONIC_CLOCK. + * include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump. + +2010-08-09 Yaakov Selkowitz <yselkowitz@users.sourceforge.net> + * fhandler_proc.cc: Add /proc/filesystems virtual file. (format_proc_filesystems): New function. * mount.cc (fs_names): Move to global scope. Redefine as array diff --git a/winsup/cygwin/hires.h b/winsup/cygwin/hires.h index 6a7fe8c72..5f87453d6 100644 --- a/winsup/cygwin/hires.h +++ b/winsup/cygwin/hires.h @@ -29,14 +29,15 @@ class hires_base void reset() {inited = false;} }; -class hires_us : public hires_base +class hires_ns : public hires_base { - LARGE_INTEGER primed_ft; LARGE_INTEGER primed_pc; double freq; void prime (); public: - LONGLONG usecs (bool justdelta); + LONGLONG nsecs (); + LONGLONG usecs () {return nsecs () / 1000LL;} + LONGLONG resolution(); }; class hires_ms : public hires_base diff --git a/winsup/cygwin/include/cygwin/version.h b/winsup/cygwin/include/cygwin/version.h index 9924e4212..efceb53b6 100644 --- a/winsup/cygwin/include/cygwin/version.h +++ b/winsup/cygwin/include/cygwin/version.h @@ -389,12 +389,13 @@ details. */ 227: Add pseudo_reloc_start, pseudo_reloc_end, image_base to per_process. 228: CW_STRERROR added. 229: Add mkostemp, mkostemps. + 230: Add CLOCK_MONOTONIC. */ /* Note that we forgot to bump the api for ualarm, strtoll, strtoull */ #define CYGWIN_VERSION_API_MAJOR 0 -#define CYGWIN_VERSION_API_MINOR 229 +#define CYGWIN_VERSION_API_MINOR 230 /* There is also a compatibity version number associated with the shared memory regions. It is incremented when incompatible diff --git a/winsup/cygwin/strace.cc b/winsup/cygwin/strace.cc index 4670f8a9a..64999831e 100644 --- a/winsup/cygwin/strace.cc +++ b/winsup/cygwin/strace.cc @@ -74,8 +74,8 @@ strace::hello () int strace::microseconds () { - static hires_us now; - return (int) now.usecs (true); + static hires_ns now; + return (int) now.usecs (); } static int __stdcall diff --git a/winsup/cygwin/sysconf.cc b/winsup/cygwin/sysconf.cc index 84aced16a..4e14417ae 100644 --- a/winsup/cygwin/sysconf.cc +++ b/winsup/cygwin/sysconf.cc @@ -165,7 +165,7 @@ static struct {cons, {c:IOV_MAX}}, /* 66, _SC_IOV_MAX */ {cons, {c:_POSIX_IPV6}}, /* 67, _SC_IPV6 */ {cons, {c:LINE_MAX}}, /* 68, _SC_LINE_MAX */ - {cons, {c:-1L}}, /* 69, _SC_MONOTONIC_CLOCK */ + {cons, {c:_POSIX_MONOTONIC_CLOCK}}, /* 69, _SC_MONOTONIC_CLOCK */ {cons, {c:_POSIX_RAW_SOCKETS}}, /* 70, _SC_RAW_SOCKETS */ {cons, {c:_POSIX_READER_WRITER_LOCKS}}, /* 71, _SC_READER_WRITER_LOCKS */ {cons, {c:_POSIX_REGEXP}}, /* 72, _SC_REGEXP */ diff --git a/winsup/cygwin/times.cc b/winsup/cygwin/times.cc index 3b154164c..c911cfe54 100644 --- a/winsup/cygwin/times.cc +++ b/winsup/cygwin/times.cc @@ -36,6 +36,8 @@ details. */ to handle that case. */ hires_ms gtod __attribute__((section (".cygwin_dll_common"), shared)); +hires_ns NO_COPY ntod; + static inline LONGLONG systime_ns () { @@ -48,12 +50,6 @@ systime_ns () return x.QuadPart; } -static inline LONGLONG -systime () -{ - return systime_ns () / 10; -} - /* Cygwin internal */ static unsigned long long __stdcall __to_clock_t (FILETIME *src, int flag) @@ -623,7 +619,7 @@ cygwin_tzset () #define stupid_printf if (cygwin_finished_initializing) debug_printf void -hires_us::prime () +hires_ns::prime () { LARGE_INTEGER ifreq; if (!QueryPerformanceFrequency (&ifreq)) @@ -642,14 +638,13 @@ hires_us::prime () return; } - primed_ft.QuadPart = systime (); - freq = (double) ((double) 1000000. / (double) ifreq.QuadPart); + freq = (double) ((double) 1000000000. / (double) ifreq.QuadPart); inited = true; SetThreadPriority (GetCurrentThread (), priority); } LONGLONG -hires_us::usecs (bool justdelta) +hires_ns::nsecs () { if (!inited) prime (); @@ -668,8 +663,7 @@ hires_us::usecs (bool justdelta) // FIXME: Use round() here? now.QuadPart = (LONGLONG) (freq * (double) (now.QuadPart - primed_pc.QuadPart)); - LONGLONG res = justdelta ? now.QuadPart : primed_ft.QuadPart + now.QuadPart; - return res; + return now.QuadPart; } void @@ -706,23 +700,53 @@ hires_ms::nsecs () extern "C" int clock_gettime (clockid_t clk_id, struct timespec *tp) { - if (clk_id != CLOCK_REALTIME) + switch (clk_id) { - set_errno (ENOSYS); - return -1; + case CLOCK_REALTIME: + { + LONGLONG now = gtod.nsecs (); + if (now == (LONGLONG) -1) + return -1; + tp->tv_sec = now / NSPERSEC; + tp->tv_nsec = (now % NSPERSEC) * (1000000000 / NSPERSEC); + break; + } + + case CLOCK_MONOTONIC: + { + LONGLONG now = ntod.nsecs (); + if (now == (LONGLONG) -1) + return -1; + + tp->tv_sec = now / 1000000000; + tp->tv_nsec = (now % 1000000000); + break; + } + + default: + set_errno (EINVAL); + return -1; } - LONGLONG now = gtod.nsecs (); - if (now == (LONGLONG) -1) - return -1; - - tp->tv_sec = now / NSPERSEC; - tp->tv_nsec = (now % NSPERSEC) * (1000000000 / NSPERSEC); return 0; } static DWORD minperiod; // FIXME: Maintain period after a fork. +LONGLONG +hires_ns::resolution() +{ + if (!inited) + prime (); + if (inited < 0) + { + set_errno (ENOSYS); + return (long long) -1; + } + + return (LONGLONG) freq; +} + UINT hires_ms::resolution () { @@ -753,17 +777,29 @@ hires_ms::resolution () extern "C" int clock_getres (clockid_t clk_id, struct timespec *tp) { - if (clk_id != CLOCK_REALTIME) + switch (clk_id) { - set_errno (ENOSYS); - return -1; + case CLOCK_REALTIME: + { + DWORD period = gtod.resolution (); + tp->tv_sec = period / 1000; + tp->tv_nsec = (period % 1000) * 1000000; + break; + } + + case CLOCK_MONOTONIC: + { + LONGLONG period = ntod.resolution (); + tp->tv_sec = period / 1000000000; + tp->tv_nsec = period % 1000000000; + break; + } + + default: + set_errno (EINVAL); + return -1; } - DWORD period = gtod.resolution (); - - tp->tv_sec = period / 1000; - tp->tv_nsec = (period % 1000) * 1000000; - return 0; } @@ -773,7 +809,7 @@ clock_setres (clockid_t clk_id, struct timespec *tp) static NO_COPY bool period_set; if (clk_id != CLOCK_REALTIME) { - set_errno (ENOSYS); + set_errno (EINVAL); return -1; } |