/usr/include/mjpegtools/mpeg2enc/synchrolib.h is in libmjpegtools-dev 1:2.1.0+debian-2.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 | /*
Synchrolib - various useful synchronisation primitives
(C) 2001 Andrew Stevens
This program 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 should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
Damn: shouldn't have to write this - but whenever you need
something, well *that's* when you don't have Internet access.
Bloody annyong that pthread_mutex's lock/unlock is only supposed to
work properly if the same thread does the locking and unlocking. Gaah!
*/
#ifndef SYNCHROLIB_H
#define SYNCHROLIB_H
#include <pthread.h>
/* Synchronisation condition */
typedef struct _sync_guard {
pthread_mutex_t mutex;
pthread_cond_t cond;
volatile int predicate;
} sync_guard_t;
typedef struct _semaphore {
pthread_mutex_t mutex;
pthread_cond_t raised;
volatile int count;
} mp_semaphore_t;
#define SEMAPHORE_INITIALIZER { PTHREAD_MUTEX_INITIALIZER, \
PTHREAD_COND_INITIALIZER, \
0 }
#define GUARD_INITIALIZER { PTHREAD_MUTEX_INITIALIZER, \
PTHREAD_COND_INITIALIZER, \
0 }
void sync_guard_init( sync_guard_t *guard, int init );
void sync_guard_test( sync_guard_t *guard);
void sync_guard_update( sync_guard_t *guard, int predicate );
void mp_semaphore_init( mp_semaphore_t *sema, int init_count );
void mp_semaphore_wait( mp_semaphore_t *sema);
void mp_semaphore_signal( mp_semaphore_t *sema, int count );
void mp_semaphore_set( mp_semaphore_t *sema );
#endif
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