wy__times.h

一个不错

/* Copyright is licensed under GNU LGPL.                 by I.J.Wang 2005

   Class for process time statistics (wrapper of struct tms)
*/

#ifndef WY__TIMES_H__
#define WY__TIMES_H__

#include <sys/times.h>
#include "wytimespec.h"

class Wy__Times {
    struct tms _tc;

  public:
    static const char class_name[];
    WY_THROW_REPLY;

    // [Syn] Construct default object
    //
    //       utime()= 0
    //       stime()= 0
    //      cutime()= 0
    //      cstime()= 0
    //
    Wy__Times() WY__TSPC();

    // [Syn] Copy constructor
    //
    Wy__Times(const Wy__Times&) WY__TSPC();

    // [Syn] Get user time
    //
    // [Ret] user CPU clock time in *this
    //
    clock_t utime(void) const WY__TSPC()
         { return _tc.tms_utime; };

    // [Syn] Get system time
    //
    // [Ret] system CPU clock time in *this
    //
    clock_t stime(void) const WY__TSPC()
         { return _tc.tms_stime; };

    // [Syn] Get children user time
    //
    // [Ret] children user CPU clock time in *this
    //
    clock_t cutime(void) const WY__TSPC()
         { return _tc.tms_cutime; };

    // [Syn] Get children system time
    //
    // [Ret] children system CPU clock time in *this
    //
    clock_t cstime(void) const WY__TSPC()
         { return _tc.tms_cstime; };

    // [Syn] Load *this with process times ??
    //
    // [Ret] Ok
    //       ...
    //
    WyRet load_times(void);

    const Wy__Times& operator =(const Wy__Times&) WY__TSPC();

    // [Syn] Compute the time difference
    //
    // [Throw] Reply
    //         Wym_EDIVZERO
    //
    // [Ret] WyTimeSpec of the value (t2-t1)/divr
    //
    // Example:
    //   t1.load_times();
    //   ...
    //   t2.load_times();
    //   diff(t1.utime(),t2.utime(),::sysconf(_SC_CLK_TCK));
    //
    static WyTimeSpec diff(clock_t t2, clock_t t1, clock_t divr);
};

#endif