/branches/network/kernel/generic/include/synch/spinlock.h |
---|
0,0 → 1,142 |
/* |
* Copyright (c) 2001-2004 Jakub Jermar |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
/** @addtogroup sync |
* @{ |
*/ |
/** @file |
*/ |
#ifndef KERN_SPINLOCK_H_ |
#define KERN_SPINLOCK_H_ |
#include <arch/types.h> |
#include <preemption.h> |
#include <atomic.h> |
#include <debug.h> |
#ifdef CONFIG_SMP |
typedef struct { |
#ifdef CONFIG_DEBUG_SPINLOCK |
char *name; |
#endif |
atomic_t val; |
} spinlock_t; |
/* |
* SPINLOCK_DECLARE is to be used for dynamically allocated spinlocks, |
* where the lock gets initialized in run time. |
*/ |
#define SPINLOCK_DECLARE(slname) spinlock_t slname |
#define SPINLOCK_EXTERN(slname) extern spinlock_t slname |
/* |
* SPINLOCK_INITIALIZE is to be used for statically allocated spinlocks. |
* It declares and initializes the lock. |
*/ |
#ifdef CONFIG_DEBUG_SPINLOCK |
#define SPINLOCK_INITIALIZE(slname) \ |
spinlock_t slname = { \ |
.name = #slname, \ |
.val = { 0 } \ |
} |
#else |
#define SPINLOCK_INITIALIZE(slname) \ |
spinlock_t slname = { \ |
.val = { 0 } \ |
} |
#endif |
extern void spinlock_initialize(spinlock_t *sl, char *name); |
extern int spinlock_trylock(spinlock_t *sl); |
extern void spinlock_lock_debug(spinlock_t *sl); |
#ifdef CONFIG_DEBUG_SPINLOCK |
# define spinlock_lock(x) spinlock_lock_debug(x) |
#else |
# define spinlock_lock(x) atomic_lock_arch(&(x)->val) |
#endif |
/** Unlock spinlock |
* |
* Unlock spinlock. |
* |
* @param sl Pointer to spinlock_t structure. |
*/ |
static inline void spinlock_unlock(spinlock_t *sl) |
{ |
ASSERT(atomic_get(&sl->val) != 0); |
/* |
* Prevent critical section code from bleeding out this way down. |
*/ |
CS_LEAVE_BARRIER(); |
atomic_set(&sl->val, 0); |
preemption_enable(); |
} |
#ifdef CONFIG_DEBUG_SPINLOCK |
extern int printf(const char *, ...); |
#define DEADLOCK_THRESHOLD 100000000 |
#define DEADLOCK_PROBE_INIT(pname) count_t pname = 0 |
#define DEADLOCK_PROBE(pname, value) \ |
if ((pname)++ > (value)) { \ |
(pname) = 0; \ |
printf("Deadlock probe %s: exceeded threshold %d\n", \ |
"cpu%d: function=%s, line=%d\n", \ |
#pname, (value), CPU->id, __func__, __LINE__); \ |
} |
#else |
#define DEADLOCK_PROBE_INIT(pname) |
#define DEADLOCK_PROBE(pname, value) |
#endif |
#else |
/* On UP systems, spinlocks are effectively left out. */ |
#define SPINLOCK_DECLARE(name) |
#define SPINLOCK_EXTERN(name) |
#define SPINLOCK_INITIALIZE(name) |
#define spinlock_initialize(x, name) |
#define spinlock_lock(x) preemption_disable() |
#define spinlock_trylock(x) (preemption_disable(), 1) |
#define spinlock_unlock(x) preemption_enable() |
#define DEADLOCK_PROBE_INIT(pname) |
#define DEADLOCK_PROBE(pname, value) |
#endif |
#endif |
/** @} |
*/ |
/branches/network/kernel/generic/include/synch/waitq.h |
---|
0,0 → 1,82 |
/* |
* Copyright (c) 2001-2004 Jakub Jermar |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
/** @addtogroup sync |
* @{ |
*/ |
/** @file |
*/ |
#ifndef KERN_WAITQ_H_ |
#define KERN_WAITQ_H_ |
#include <arch/types.h> |
#include <synch/spinlock.h> |
#include <synch/synch.h> |
#include <adt/list.h> |
typedef enum { |
WAKEUP_FIRST = 0, |
WAKEUP_ALL |
} wakeup_mode_t; |
/** Wait queue structure. */ |
typedef struct { |
/** Lock protecting wait queue structure. |
* |
* Must be acquired before T.lock for each T of type thread_t. |
*/ |
SPINLOCK_DECLARE(lock); |
/** |
* Number of waitq_wakeup() calls that didn't find a thread to wake up. |
*/ |
int missed_wakeups; |
/** List of sleeping threads for wich there was no missed_wakeup. */ |
link_t head; |
} waitq_t; |
#define waitq_sleep(wq) \ |
waitq_sleep_timeout((wq), SYNCH_NO_TIMEOUT, SYNCH_FLAGS_NONE) |
struct thread; |
extern void waitq_initialize(waitq_t *wq); |
extern int waitq_sleep_timeout(waitq_t *wq, uint32_t usec, int flags); |
extern ipl_t waitq_sleep_prepare(waitq_t *wq); |
extern int waitq_sleep_timeout_unsafe(waitq_t *wq, uint32_t usec, int flags); |
extern void waitq_sleep_finish(waitq_t *wq, int rc, ipl_t ipl); |
extern void waitq_wakeup(waitq_t *wq, wakeup_mode_t mode); |
extern void _waitq_wakeup_unsafe(waitq_t *wq, wakeup_mode_t mode); |
extern void waitq_interrupt_sleep(struct thread *t); |
#endif |
/** @} |
*/ |
/branches/network/kernel/generic/include/synch/mutex.h |
---|
0,0 → 1,60 |
/* |
* Copyright (c) 2001-2004 Jakub Jermar |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
/** @addtogroup sync |
* @{ |
*/ |
/** @file |
*/ |
#ifndef KERN_MUTEX_H_ |
#define KERN_MUTEX_H_ |
#include <arch/types.h> |
#include <synch/semaphore.h> |
#include <synch/synch.h> |
typedef struct { |
semaphore_t sem; |
} mutex_t; |
#define mutex_lock(mtx) \ |
_mutex_lock_timeout((mtx), SYNCH_NO_TIMEOUT, SYNCH_FLAGS_NONE) |
#define mutex_trylock(mtx) \ |
_mutex_lock_timeout((mtx), SYNCH_NO_TIMEOUT, SYNCH_FLAGS_NON_BLOCKING) |
#define mutex_lock_timeout(mtx, usec) \ |
_mutex_lock_timeout((mtx), (usec), SYNCH_FLAGS_NON_BLOCKING) |
extern void mutex_initialize(mutex_t *mtx); |
extern int _mutex_lock_timeout(mutex_t *mtx, uint32_t usec, int flags); |
extern void mutex_unlock(mutex_t *mtx); |
#endif |
/** @} |
*/ |
/branches/network/kernel/generic/include/synch/futex.h |
---|
0,0 → 1,65 |
/* |
* Copyright (c) 2006 Jakub Jermar |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
/** @addtogroup sync |
* @{ |
*/ |
/** @file |
*/ |
#ifndef KERN_FUTEX_H_ |
#define KERN_FUTEX_H_ |
#include <arch/types.h> |
#include <synch/waitq.h> |
#include <genarch/mm/page_ht.h> |
#include <genarch/mm/page_pt.h> |
/** Kernel-side futex structure. */ |
typedef struct { |
/** Physical address of the status variable. */ |
uintptr_t paddr; |
/** Wait queue for threads waiting for futex availability. */ |
waitq_t wq; |
/** Futex hash table link. */ |
link_t ht_link; |
/** Number of tasks that reference this futex. */ |
count_t refcount; |
} futex_t; |
extern void futex_init(void); |
extern unative_t sys_futex_sleep_timeout(uintptr_t uaddr, uint32_t usec, |
int flags); |
extern unative_t sys_futex_wakeup(uintptr_t uaddr); |
extern void futex_cleanup(void); |
#endif |
/** @} |
*/ |
/branches/network/kernel/generic/include/synch/condvar.h |
---|
0,0 → 1,61 |
/* |
* Copyright (c) 2001-2004 Jakub Jermar |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
/** @addtogroup sync |
* @{ |
*/ |
/** @file |
*/ |
#ifndef KERN_CONDVAR_H_ |
#define KERN_CONDVAR_H_ |
#include <arch/types.h> |
#include <synch/waitq.h> |
#include <synch/mutex.h> |
#include <synch/synch.h> |
typedef struct { |
waitq_t wq; |
} condvar_t; |
#define condvar_wait(cv, mtx) \ |
_condvar_wait_timeout((cv), (mtx), SYNCH_NO_TIMEOUT, SYNCH_FLAGS_NONE) |
#define condvar_wait_timeout(cv, mtx, usec) \ |
_condvar_wait_timeout((cv), (mtx), (usec), SYNCH_FLAGS_NONE) |
extern void condvar_initialize(condvar_t *cv); |
extern void condvar_signal(condvar_t *cv); |
extern void condvar_broadcast(condvar_t *cv); |
extern int _condvar_wait_timeout(condvar_t *cv, mutex_t *mtx, uint32_t usec, |
int flags); |
#endif |
/** @} |
*/ |
/branches/network/kernel/generic/include/synch/rwlock.h |
---|
0,0 → 1,83 |
/* |
* Copyright (c) 2001-2004 Jakub Jermar |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
/** @addtogroup sync |
* @{ |
*/ |
/** @file |
*/ |
#ifndef KERN_RWLOCK_H_ |
#define KERN_RWLOCK_H_ |
#include <arch/types.h> |
#include <synch/mutex.h> |
#include <synch/synch.h> |
#include <synch/spinlock.h> |
typedef enum { |
RWLOCK_NONE, |
RWLOCK_READER, |
RWLOCK_WRITER |
} rwlock_type_t; |
typedef struct { |
SPINLOCK_DECLARE(lock); |
/** |
* Mutex for writers, readers can bypass it if readers_in is positive. |
*/ |
mutex_t exclusive; |
/** Number of readers in critical section. */ |
count_t readers_in; |
} rwlock_t; |
#define rwlock_write_lock(rwl) \ |
_rwlock_write_lock_timeout((rwl), SYNCH_NO_TIMEOUT, SYNCH_FLAGS_NONE) |
#define rwlock_read_lock(rwl) \ |
_rwlock_read_lock_timeout((rwl), SYNCH_NO_TIMEOUT, SYNCH_FLAGS_NONE) |
#define rwlock_write_trylock(rwl) \ |
_rwlock_write_lock_timeout((rwl), SYNCH_NO_TIMEOUT, \ |
SYNCH_FLAGS_NON_BLOCKING) |
#define rwlock_read_trylock(rwl) \ |
_rwlock_read_lock_timeout((rwl), SYNCH_NO_TIMEOUT, \ |
SYNCH_FLAGS_NON_BLOCKING) |
#define rwlock_write_lock_timeout(rwl, usec) \ |
_rwlock_write_lock_timeout((rwl), (usec), SYNCH_FLAGS_NONE) |
#define rwlock_read_lock_timeout(rwl, usec) \ |
_rwlock_read_lock_timeout((rwl), (usec), SYNCH_FLAGS_NONE) |
extern void rwlock_initialize(rwlock_t *rwl); |
extern void rwlock_read_unlock(rwlock_t *rwl); |
extern void rwlock_write_unlock(rwlock_t *rwl); |
extern int _rwlock_read_lock_timeout(rwlock_t *rwl, uint32_t usec, int flags); |
extern int _rwlock_write_lock_timeout(rwlock_t *rwl, uint32_t usec, int flags); |
#endif |
/** @} |
*/ |
/branches/network/kernel/generic/include/synch/semaphore.h |
---|
0,0 → 1,60 |
/* |
* Copyright (c) 2001-2004 Jakub Jermar |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
/** @addtogroup sync |
* @{ |
*/ |
/** @file |
*/ |
#ifndef KERN_SEMAPHORE_H_ |
#define KERN_SEMAPHORE_H_ |
#include <arch/types.h> |
#include <synch/waitq.h> |
#include <synch/synch.h> |
typedef struct { |
waitq_t wq; |
} semaphore_t; |
#define semaphore_down(s) \ |
_semaphore_down_timeout((s), SYNCH_NO_TIMEOUT, SYNCH_FLAGS_NONE) |
#define semaphore_trydown(s) \ |
_semaphore_down_timeout((s), SYNCH_NO_TIMEOUT, SYNCH_FLAGS_NON_BLOCKING) |
#define semaphore_down_timeout(s, usec) \ |
_semaphore_down_timeout((s), (usec), SYNCH_FLAGS_NONE) |
extern void semaphore_initialize(semaphore_t *s, int val); |
extern int _semaphore_down_timeout(semaphore_t *s, uint32_t usec, int flags); |
extern void semaphore_up(semaphore_t *s); |
#endif |
/** @} |
*/ |
/branches/network/kernel/generic/include/synch/synch.h |
---|
0,0 → 1,67 |
/* |
* Copyright (c) 2001-2004 Jakub Jermar |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
/** @addtogroup sync |
* @{ |
*/ |
/** @file |
*/ |
#ifndef KERN_SYNCH_H_ |
#define KERN_SYNCH_H_ |
/** Request with no timeout. */ |
#define SYNCH_NO_TIMEOUT 0 |
/** No flags specified. */ |
#define SYNCH_FLAGS_NONE 0 |
/** Non-blocking operation request. */ |
#define SYNCH_FLAGS_NON_BLOCKING (1 << 0) |
/** Interruptible operation. */ |
#define SYNCH_FLAGS_INTERRUPTIBLE (1 << 1) |
/** Could not satisfy the request without going to sleep. */ |
#define ESYNCH_WOULD_BLOCK 1 |
/** Timeout occurred. */ |
#define ESYNCH_TIMEOUT 2 |
/** Sleep was interrupted. */ |
#define ESYNCH_INTERRUPTED 4 |
/** Operation succeeded without sleeping. */ |
#define ESYNCH_OK_ATOMIC 8 |
/** Operation succeeded and did sleep. */ |
#define ESYNCH_OK_BLOCKED 16 |
#define SYNCH_FAILED(rc) \ |
((rc) & (ESYNCH_WOULD_BLOCK | ESYNCH_TIMEOUT | ESYNCH_INTERRUPTED)) |
#define SYNCH_OK(rc) \ |
((rc) & (ESYNCH_OK_ATOMIC | ESYNCH_OK_BLOCKED)) |
#endif |
/** @} |
*/ |