pike.git / src / pike_rusage.h

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pike.git/src/pike_rusage.h:1:   /*   || This file is part of Pike. For copyright information see COPYRIGHT.   || Pike is distributed under GPL, LGPL and MPL. See the file COPYING   || for more information. - || $Id: pike_rusage.h,v 1.12 2003/01/13 13:15:14 mast Exp $ + || $Id: pike_rusage.h,v 1.13 2003/01/13 16:11:32 mast Exp $   */      #ifndef PIKE_RUSAGE_H   #define PIKE_RUSAGE_H      /* Prototypes begin here */   typedef long pike_rusage_t[29];   int pike_get_rusage(pike_rusage_t rusage_values);   long *low_rusage(void);      /* get_cpu_time returns the consumed cpu time (both in kernel and user -  * space, if applicable), or zero if it couldn't be read. */ +  * space, if applicable), or zero if it couldn't be read. Note that +  * many systems have fairly poor resolution, e.g. on Linux x86 it's +  * only 0.01 second. gettimeofday can therefore be a better choice to +  * measure small time intervals. */   #ifdef INT64 - /* The time is returned in nanoseconds. (There's no guarantee that the -  * returned value has nanosecond resolution.) */ + /* The time is returned in nanoseconds. */   typedef INT64 cpu_time_t;   #define LONG_CPU_TIME   #define CPU_TIME_TICKS /* per second */ ((cpu_time_t) 1000000000)   #define CPU_TIME_UNIT "ns"   #else   /* The time is returned in milliseconds. (Note that the value will    * wrap after about 49 days.) */   typedef unsigned long cpu_time_t;   #define CPU_TIME_TICKS /* per second */ ((cpu_time_t) 1000)   #define CPU_TIME_UNIT "ms"