| 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 |
| |
| /** @} |
| */ |