gcc/libiberty/getruntime.c

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/* Return time used so far, in microseconds.
Copyright (C) 1994-2018 Free Software Foundation, Inc.
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This file is part of the libiberty library.
Libiberty is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
Libiberty is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with libiberty; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
Boston, MA 02110-1301, USA. */
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#include "config.h"
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#include "ansidecl.h"
#include "libiberty.h"
/* On some systems (such as WindISS), you must include <sys/types.h>
to get the definition of "time_t" before you include <time.h>. */
#include <sys/types.h>
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/* There are several ways to get elapsed execution time; unfortunately no
single way is available for all host systems, nor are there reliable
ways to find out which way is correct for a given host. */
#ifdef TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# if HAVE_SYS_TIME_H
# include <sys/time.h>
# else
# ifdef HAVE_TIME_H
# include <time.h>
# endif
# endif
#endif
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#if defined (HAVE_GETRUSAGE) && defined (HAVE_SYS_RESOURCE_H)
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#include <sys/resource.h>
#endif
#ifdef HAVE_TIMES
#ifdef HAVE_SYS_PARAM_H
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#include <sys/param.h>
#endif
#include <sys/times.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
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/* This is a fallback; if wrong, it will likely make obviously wrong
results. */
#ifndef CLOCKS_PER_SEC
#define CLOCKS_PER_SEC 1
#endif
#ifndef RUSAGE_SELF
#define RUSAGE_SELF 0
#endif
#ifdef _SC_CLK_TCK
#define GNU_HZ sysconf(_SC_CLK_TCK)
#else
#ifdef HZ
#define GNU_HZ HZ
#else
#ifdef CLOCKS_PER_SEC
#define GNU_HZ CLOCKS_PER_SEC
#endif
#endif
#endif
/*
@deftypefn Replacement long get_run_time (void)
Returns the time used so far, in microseconds. If possible, this is
the time used by this process, else it is the elapsed time since the
process started.
@end deftypefn
*/
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long
md5.h: Remove definition and uses of __P. include/ 2005-03-27 Gabriel Dos Reis <gdr@integrable-solutions.net> * md5.h: Remove definition and uses of __P. * dyn-string.h: Remove uses of PARAMS. * fibheap.h: Likewise. * floatformat.h: Likewise. * hashtab.h: Likewise. libiberty/ 2005-03-27 Gabriel Dos Reis <gdr@integrable-solutions.net> Convert libiberty to use ISO C prototype style 4/n. * hashtab.c (higher_prime_index, hash_pointer, eq_pointer, htab_size, htab_elements, htab_mod_1, htab_mod, htab_mod_m2, htab_create_alloc, htab_set_functions_ex, htab_create, htab_try_create, htab_delete, htab_empty, find_empty_slot_for_expand, htab_expand, htab_find_with_hash, htab_find, htab_find_slot_with_hash, htab_find_slot, htab_remove_elt, htab_remove_elt_with_hash, htab_clear_slot, htab_traverse_noresize, htab_traverse, htab_collisions, htab_hash_string, iterative_hash): Use ISO C prototype. * hex.c (hex_init): Likewise. * index.c (index): Likewise. * insque.c (insque, remque): Likewise. * lbasename.c (lbasename): Likewise. * lrealpath.c (lrealpath): Likewise. * make-relative-prefix.c (save_string, split_directories, free_split_directories, make_relative_prefix): Likewise. * make-temp-file.c (try, choose_tmpdir, make_temp_file): Likewise. * md5.c (md5_init_ctx, md5_read_ctx, md5_finish_ctx, md5_stream, md5_buffer, md5_process_bytes, md5_process_block): Likewise. * memchr.c (memchr): Likewise. * memcpy.c (memcpy): Likewise. * memmove.c (memmove): Likewise. * gettimeofday.c (gettimeofday): Likewise. * getruntime.c (get_run_time): Likewise. * getpwd.c (getpwd, getpwd): Likewise. * getpagesize.c (getpagesize): Likewise. * getopt1.c (getopt_long, getopt_long_only, main): Likewise. * getopt.c (my_index, exchange, _getopt_initialize, _getopt_internal, getopt, main): Likewise. * getcwd.c (getcwd): Likewise. * fnmatch.c (fnmatch): Likewise. * floatformat.c (floatformat_always_valid, floatformat_i387_ext_is_valid, get_field, floatformat_to_double, put_field, floatformat_from_double, floatformat_is_valid, ieee_test, main): Likewise. * fibheap.c (fibheap_new, fibnode_new, fibheap_compare, fibheap_comp_data, fibheap_insert, fibheap_min, fibheap_min_key, fibheap_union, fibheap_extract_min, fibheap_replace_key_data, fibheap_replace_key, fibheap_replace_data, fibheap_delete_node, fibheap_delete, fibheap_empty, fibheap_extr_min_node, fibheap_ins_root, fibheap_rem_root, fibheap_consolidate, fibheap_link, fibheap_cut, fibheap_cascading_cut, fibnode_insert_after, fibnode_remove): Likewise. * ffs.c (ffs): Likewise. * fdmatch.c (fdmatch): Likewise. * dyn-string.c (dyn_string_init, dyn_string_new, dyn_string_delete, dyn_string_release, dyn_string_resize, dyn_string_clear, dyn_string_copy, dyn_string_copy_cstr, dyn_string_prepend, dyn_string_prepend_cstr, dyn_string_insert, dyn_string_insert_cstr, dyn_string_insert_char, dyn_string_append, dyn_string_append_cstr, dyn_string_append_char, dyn_string_substring, dyn_string_eq): Likewise. From-SVN: r97113
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get_run_time (void)
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{
#if defined (HAVE_GETRUSAGE) && defined (HAVE_SYS_RESOURCE_H)
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struct rusage rusage;
getrusage (RUSAGE_SELF, &rusage);
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return (rusage.ru_utime.tv_sec * 1000000 + rusage.ru_utime.tv_usec
+ rusage.ru_stime.tv_sec * 1000000 + rusage.ru_stime.tv_usec);
#else /* ! HAVE_GETRUSAGE */
#ifdef HAVE_TIMES
struct tms tms;
times (&tms);
return (tms.tms_utime + tms.tms_stime) * (1000000 / GNU_HZ);
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#else /* ! HAVE_TIMES */
/* Fall back on clock and hope it's correctly implemented. */
const long clocks_per_sec = CLOCKS_PER_SEC;
if (clocks_per_sec <= 1000000)
return clock () * (1000000 / clocks_per_sec);
else
return clock () / clocks_per_sec;
#endif /* HAVE_TIMES */
#endif /* HAVE_GETRUSAGE */
}