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30891f35fa
We stopped adding "Contributed by" or similar lines in sources in 2012 in favour of git logs and keeping the Contributors section of the glibc manual up to date. Removing these lines makes the license header a bit more consistent across files and also removes the possibility of error in attribution when license blocks or files are copied across since the contributed-by lines don't actually reflect reality in those cases. Move all "Contributed by" and similar lines (Written by, Test by, etc.) into a new file CONTRIBUTED-BY to retain record of these contributions. These contributors are also mentioned in manual/contrib.texi, so we just maintain this additional record as a courtesy to the earlier developers. The following scripts were used to filter a list of files to edit in place and to clean up the CONTRIBUTED-BY file respectively. These were not added to the glibc sources because they're not expected to be of any use in future given that this is a one time task: https://gist.github.com/siddhesh/b5ecac94eabfd72ed2916d6d8157e7dc https://gist.github.com/siddhesh/15ea1f5e435ace9774f485030695ee02 Reviewed-by: Carlos O'Donell <carlos@redhat.com>
60 lines
2.4 KiB
C
60 lines
2.4 KiB
C
/* High precision, low overhead timing functions. Generic version.
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Copyright (C) 1998-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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/* In case a platform supports timers in the hardware the following macros
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and types must be defined:
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- HP_TIMING_INLINE: this macro is non-zero if the functionality is not
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implemented using function calls but instead uses some inlined code
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which might simply consist of a few assembler instructions. We have to
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know this since we might want to use the macros here in places where we
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cannot make function calls.
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- hp_timing_t: This is the type for variables used to store the time
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values. This type must be integral.
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- HP_TIMING_NOW: place timestamp for current time in variable given as
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parameter.
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*/
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/* The target supports hp-timing. Share the common infrastructure. */
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#include <string.h>
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#include <sys/param.h>
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#include <_itoa.h>
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/* Compute the difference between START and END, storing into DIFF. */
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#define HP_TIMING_DIFF(Diff, Start, End) ((Diff) = (End) - (Start))
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/* Accumulate ADD into SUM. No attempt is made to be thread-safe. */
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#define HP_TIMING_ACCUM_NT(Sum, Diff) ((Sum) += (Diff))
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#define HP_TIMING_PRINT_SIZE (3 * sizeof (hp_timing_t) + 1)
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/* Write a decimal representation of the timing value into the given string. */
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#define HP_TIMING_PRINT(Dest, Len, Val) \
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do { \
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char __buf[HP_TIMING_PRINT_SIZE]; \
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char *__dest = (Dest); \
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size_t __len = (Len); \
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char *__cp = _itoa ((Val), __buf + sizeof (__buf), 10, 0); \
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size_t __cp_len = MIN (__buf + sizeof (__buf) - __cp, __len); \
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memcpy (__dest, __cp, __cp_len); \
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__dest[__cp_len - 1] = '\0'; \
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} while (0)
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