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Diffstat (limited to 'backend/timing.h')
| -rw-r--r-- | backend/timing.h | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/backend/timing.h b/backend/timing.h new file mode 100644 index 0000000..8181cda --- /dev/null +++ b/backend/timing.h @@ -0,0 +1,119 @@ +/* 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) */ |