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timevar: prefer #elif

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* lib/timevar.c: Use #if/#elif to be clearer about mutually exclusive
cases.
Indent CPP nested directives.
This commit is contained in:
Akim Demaille
2018-09-22 10:20:14 +02:00
parent 8c6b06df1f
commit 100f8696c7
1 changed files with 23 additions and 37 deletions
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60
lib/timevar.c
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@@ -32,7 +32,7 @@ int timevar_report = 0;
# include <sys/times.h>
#endif
#ifdef HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
# include <sys/resource.h>
#endif
#ifndef HAVE_CLOCK_T
@@ -63,37 +63,29 @@ extern clock_t clock (void);
We mustn't use CLOCKS_PER_SEC except with clock(). */
#if HAVE_SYSCONF && defined _SC_CLK_TCK
# define TICKS_PER_SECOND sysconf (_SC_CLK_TCK) /* POSIX 1003.1-1996 */
#elif defined CLK_TCK
# define TICKS_PER_SECOND CLK_TCK /* POSIX 1003.1-1988; obsolescent */
#elif defined HZ
# define TICKS_PER_SECOND HZ /* traditional UNIX */
#else
# ifdef CLK_TCK
# define TICKS_PER_SECOND CLK_TCK /* POSIX 1003.1-1988; obsolescent */
# else
# ifdef HZ
# define TICKS_PER_SECOND HZ /* traditional UNIX */
# else
# define TICKS_PER_SECOND 100 /* often the correct value */
# endif
# endif
# define TICKS_PER_SECOND 100 /* often the correct value */
#endif
/* Prefer times to getrusage to clock (each gives successively less
information). */
#ifdef HAVE_TIMES
#if defined HAVE_TIMES
# define USE_TIMES
# define HAVE_USER_TIME
# define HAVE_SYS_TIME
# define HAVE_WALL_TIME
#else
#ifdef HAVE_GETRUSAGE
#elif defined HAVE_GETRUSAGE
# define USE_GETRUSAGE
# define HAVE_USER_TIME
# define HAVE_SYS_TIME
#else
#ifdef HAVE_CLOCK
#elif defined HAVE_CLOCK
# define USE_CLOCK
# define HAVE_USER_TIME
#endif
#endif
#endif
/* libc is very likely to have snuck a call to sysconf() into one of
the underlying constants, and that can be very slow, so we have to
@@ -101,12 +93,10 @@ extern clock_t clock (void);
_constants_ variable at run time, anyway? */
#ifdef USE_TIMES
static float ticks_to_msec;
#define TICKS_TO_MSEC (1.0 / TICKS_PER_SECOND)
#endif
#ifdef USE_CLOCK
# define TICKS_TO_MSEC (1.0 / TICKS_PER_SECOND)
#elif defined USE_CLOCK
static float clocks_to_msec;
#define CLOCKS_TO_MSEC (1.0 / CLOCKS_PER_SEC)
# define CLOCKS_TO_MSEC (1.0 / CLOCKS_PER_SEC)
#endif
#include "timevar.h"
@@ -192,14 +182,12 @@ get_time (struct timevar_time_def *now)
now->wall = times (&tms) * ticks_to_msec;
now->user = (tms.tms_utime + tms.tms_cutime) * ticks_to_msec;
now->sys = (tms.tms_stime + tms.tms_cstime) * ticks_to_msec;
#endif
#ifdef USE_GETRUSAGE
#elif defined USE_GETRUSAGE
struct rusage rusage;
getrusage (RUSAGE_CHILDREN, &rusage);
now->user = rusage.ru_utime.tv_sec + rusage.ru_utime.tv_usec * 1e-6;
now->sys = rusage.ru_stime.tv_sec + rusage.ru_stime.tv_usec * 1e-6;
#endif
#ifdef USE_CLOCK
#elif defined USE_CLOCK
now->user = clock () * clocks_to_msec;
#endif
}
@@ -234,10 +222,9 @@ init_timevar ()
#include "timevar.def"
#undef DEFTIMEVAR
#ifdef USE_TIMES
#if defined USE_TIMES
ticks_to_msec = TICKS_TO_MSEC;
#endif
#ifdef USE_CLOCK
#elif defined USE_CLOCK
clocks_to_msec = CLOCKS_TO_MSEC;
#endif
}
@@ -460,26 +447,26 @@ timevar_print (FILE *fp)
/* The timing variable name. */
fprintf (fp, " %-22s:", tv->name);
#ifdef HAVE_USER_TIME
# ifdef HAVE_USER_TIME
/* Print user-mode time for this process. */
fprintf (fp, "%7.2f (%2.0f%%) usr",
tv->elapsed.user,
(total->user == 0 ? 0 : tv->elapsed.user / total->user) * 100);
#endif /* HAVE_USER_TIME */
# endif
#ifdef HAVE_SYS_TIME
# ifdef HAVE_SYS_TIME
/* Print system-mode time for this process. */
fprintf (fp, "%7.2f (%2.0f%%) sys",
tv->elapsed.sys,
(total->sys == 0 ? 0 : tv->elapsed.sys / total->sys) * 100);
#endif /* HAVE_SYS_TIME */
# endif
#ifdef HAVE_WALL_TIME
# ifdef HAVE_WALL_TIME
/* Print wall clock time elapsed. */
fprintf (fp, "%7.2f (%2.0f%%) wall",
tv->elapsed.wall,
(total->wall == 0 ? 0 : tv->elapsed.wall / total->wall) * 100);
#endif /* HAVE_WALL_TIME */
# endif
putc ('\n', fp);
}
@@ -496,8 +483,7 @@ timevar_print (FILE *fp)
fprintf (fp, "%7.2f\n", total->wall);
#endif
#endif /* defined (HAVE_USER_TIME) || defined (HAVE_SYS_TIME)
|| defined (HAVE_WALL_TIME) */
#endif /* defined HAVE_USER_TIME || defined HAVE_SYS_TIME || defined HAVE_WALL_TIME */
}
/* Returns time (user + system) used so far by the compiler process,