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/* timing.h -- optional support for run-time time stamp collection
* Copyright (C) 2009 SEIKO EPSON CORPORATION
*
* License: GPLv2+|iscan
* Authors: AVASYS CORPORATION
*
* This file is part of the SANE backend distributed with Image Scan!
*
* Image Scan!'s SANE backend is free software.
* You can redistribute it and/or modify it under the terms of the GNU
* General Public License as published by the Free Software Foundation;
* either version 2 of the License or at your option any later version.
*
* This program 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 General Public License for more details.
*
* You ought to have received a copy of the GNU General Public License
* along with this package. If not, see <http://www.gnu.org/licenses/>.
*
*
* Linking Image Scan!'s SANE backend statically or dynamically with
* other modules is making a combined work based on this SANE backend.
* Thus, the terms and conditions of the GNU General Public License
* cover the whole combination.
*
* As a special exception, the copyright holders of Image Scan!'s SANE
* backend give you permission to link Image Scan!'s SANE backend with
* SANE frontends that communicate with Image Scan!'s SANE backend
* solely through the SANE Application Programming Interface,
* regardless of the license terms of these SANE frontends, and to
* copy and distribute the resulting combined work under terms of your
* choice, provided that every copy of the combined work is
* accompanied by a complete copy of the source code of Image Scan!'s
* SANE backend (the version of Image Scan!'s SANE backend used to
* produce the combined work), being distributed under the terms of
* the GNU General Public License plus this exception. An independent
* module is a module which is not derived from or based on Image
* Scan!'s SANE backend.
*
* As a special exception, the copyright holders of Image Scan!'s SANE
* backend give you permission to link Image Scan!'s SANE backend with
* independent modules that communicate with Image Scan!'s SANE
* backend solely through the "Interpreter" interface, regardless of
* the license terms of these independent modules, and to copy and
* distribute the resulting combined work under terms of your choice,
* provided that every copy of the combined work is accompanied by a
* complete copy of the source code of Image Scan!'s SANE backend (the
* version of Image Scan!'s SANE backend used to produce the combined
* work), being distributed under the terms of the GNU General Public
* License plus this exception. An independent module is a module
* which is not derived from or based on Image Scan!'s SANE backend.
*
* Note that people who make modified versions of Image Scan!'s SANE
* backend are not obligated to grant special exceptions for their
* modified versions; it is their choice whether to do so. The GNU
* General Public License gives permission to release a modified
* version without this exception; this exception also makes it
* possible to release a modified version which carries forward this
* exception.
*/
#ifndef timing_h_included
#define timing_h_included
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#ifndef ENABLE_TIMING
#define ENABLE_TIMING 0
#endif
#define TIME_PASS_MAX 100
extern size_t time_pass_count;
#if !ENABLE_TIMING /* turn API calls into no-ops */
#define time_clear() do {} while (0)
#define time_stamp(interval,end) do {} while (0)
#define time_stats(count) do {} while (0)
#else /* do something useful */
#include <time.h>
#include "defines.h"
struct time_stamp_
{
bool is_valid;
struct timespec t;
};
struct time_interval_
{
struct time_stamp_ start;
struct time_stamp_ stop;
struct time_stamp_ span;
};
extern struct time_interval_ time_scan;
extern struct time_interval_ time_pass[TIME_PASS_MAX];
#define time_stamp(interval,end) \
do { \
interval.end.is_valid = (0 == clock_gettime (CLOCK_MONOTONIC, \
&(interval.end.t))); \
} while (0)
void time_clear (void);
void time_stats (size_t count);
#endif /* ENABLE_TIMING */
#endif /* !defined (timing_h_included) */
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