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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/misc.h
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@@ -27,7 +27,6 @@
#include "types.h"
extern const std::string engine_info(bool to_uci = false);
extern int system_time();
extern int cpu_count();
extern void timed_wait(WaitCondition&, Lock&, int);
extern void prefetch(char* addr);
@@ -42,9 +41,23 @@ extern Move move_from_uci(const Position& pos, const std::string& str);
extern const std::string move_to_uci(Move m, bool chess960);
extern const std::string move_to_san(Position& pos, Move m);
struct Log : public std::ofstream {
Log(const std::string& f = "log.txt") : std::ofstream(f.c_str(), std::ios::out | std::ios::app) {}
~Log() { if (is_open()) close(); }
};
class Time {
public:
void restart() { system_time(&t); }
uint64_t msec() const { return time_to_msec(t); }
int elapsed() const { return int(current_time().msec() - time_to_msec(t)); }
static Time current_time() { Time t; t.restart(); return t; }
private:
my_time_t t;
};
#endif // !defined(MISC_H_INCLUDED)