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Rewrite time measurement code

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Introduce and use a new Time class designed after
QTime, from Qt framework. Should be a more clear and
self documented code.

As an added benefit we now use 64 bits internally to get
millisecs from system time. This avoids to wrap around
to 0 every 2^32 milliseconds, which is 49.71 days.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2012-03-03 09:35:56 +01:00
parent b966adf103
commit 161c6b025e
7 changed files with 56 additions and 63 deletions
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15
src/types.h
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@@ -44,6 +44,7 @@
#pragma warning(disable: 4127) // Conditional expression is constant
#pragma warning(disable: 4146) // Unary minus operator applied to unsigned type
#pragma warning(disable: 4800) // Forcing value to bool 'true' or 'false'
#pragma warning(disable: 4996) // Function _ftime() may be unsafe
// MSVC does not support <inttypes.h>
typedef signed __int8 int8_t;
@@ -59,6 +60,20 @@ typedef unsigned __int64 uint64_t;
# include <inttypes.h>
#endif
#if defined(_WIN32) || defined(_WIN64)
# include <sys/timeb.h>
typedef _timeb my_time_t;
inline void system_time(my_time_t* t) { _ftime(t); }
inline uint64_t time_to_msec(const my_time_t& t) { return t.time * 1000 + t.millitm; }
#else
# include <sys/time.h>
typedef timeval my_time_t;
inline void system_time(my_time_t* t) { gettimeofday(t, NULL); }
inline uint64_t time_to_msec(const my_time_t& t) { return t.tv_sec * 1000 + t.tv_usec / 1000; }
#endif
#if defined(_WIN64)
# include <intrin.h> // MSVC popcnt and bsfq instrinsics
# define IS_64BIT