| 1 | /*
|
|---|
| 2 | * Copyright (c) 2001-2004 Jakub Jermar
|
|---|
| 3 | * All rights reserved.
|
|---|
| 4 | *
|
|---|
| 5 | * Redistribution and use in source and binary forms, with or without
|
|---|
| 6 | * modification, are permitted provided that the following conditions
|
|---|
| 7 | * are met:
|
|---|
| 8 | *
|
|---|
| 9 | * - Redistributions of source code must retain the above copyright
|
|---|
| 10 | * notice, this list of conditions and the following disclaimer.
|
|---|
| 11 | * - Redistributions in binary form must reproduce the above copyright
|
|---|
| 12 | * notice, this list of conditions and the following disclaimer in the
|
|---|
| 13 | * documentation and/or other materials provided with the distribution.
|
|---|
| 14 | * - The name of the author may not be used to endorse or promote products
|
|---|
| 15 | * derived from this software without specific prior written permission.
|
|---|
| 16 | *
|
|---|
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|---|
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|---|
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|---|
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|---|
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|---|
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|---|
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|---|
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|---|
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|---|
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|---|
| 27 | */
|
|---|
| 28 |
|
|---|
| 29 | /** @addtogroup sync
|
|---|
| 30 | * @{
|
|---|
| 31 | */
|
|---|
| 32 | /** @file
|
|---|
| 33 | */
|
|---|
| 34 |
|
|---|
| 35 | #ifndef KERN_MUTEX_H_
|
|---|
| 36 | #define KERN_MUTEX_H_
|
|---|
| 37 |
|
|---|
| 38 | #include <typedefs.h>
|
|---|
| 39 | #include <synch/semaphore.h>
|
|---|
| 40 | #include <abi/synch.h>
|
|---|
| 41 |
|
|---|
| 42 | typedef enum {
|
|---|
| 43 | MUTEX_PASSIVE,
|
|---|
| 44 | MUTEX_ACTIVE
|
|---|
| 45 | } mutex_type_t;
|
|---|
| 46 |
|
|---|
| 47 | typedef struct {
|
|---|
| 48 | mutex_type_t type;
|
|---|
| 49 | semaphore_t sem;
|
|---|
| 50 | } mutex_t;
|
|---|
| 51 |
|
|---|
| 52 | #define mutex_lock(mtx) \
|
|---|
| 53 | _mutex_lock_timeout((mtx), SYNCH_NO_TIMEOUT, SYNCH_FLAGS_NONE)
|
|---|
| 54 |
|
|---|
| 55 | #define mutex_trylock(mtx) \
|
|---|
| 56 | _mutex_lock_timeout((mtx), SYNCH_NO_TIMEOUT, SYNCH_FLAGS_NON_BLOCKING)
|
|---|
| 57 |
|
|---|
| 58 | #define mutex_lock_timeout(mtx, usec) \
|
|---|
| 59 | _mutex_lock_timeout((mtx), (usec), SYNCH_FLAGS_NON_BLOCKING)
|
|---|
| 60 |
|
|---|
| 61 | extern void mutex_initialize(mutex_t *, mutex_type_t);
|
|---|
| 62 | extern bool mutex_locked(mutex_t *);
|
|---|
| 63 | extern int _mutex_lock_timeout(mutex_t *, uint32_t, unsigned int);
|
|---|
| 64 | extern void mutex_unlock(mutex_t *);
|
|---|
| 65 |
|
|---|
| 66 | #endif
|
|---|
| 67 |
|
|---|
| 68 | /** @}
|
|---|
| 69 | */
|
|---|
