119 lines
3.6 KiB
C
119 lines
3.6 KiB
C
/****************************************************************************
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* sched/semaphore/semaphore.h
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __SCHED_SEMAPHORE_SEMAPHORE_H
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#define __SCHED_SEMAPHORE_SEMAPHORE_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/compiler.h>
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#include <nuttx/semaphore.h>
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#include <nuttx/sched.h>
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#include <nuttx/atomic.h>
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#include <stdint.h>
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#include <stdbool.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define NXSEM_COUNT(s) ((FAR atomic_short *)&(s)->semcount)
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/* Common semaphore logic */
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#ifdef CONFIG_PRIORITY_INHERITANCE
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void nxsem_initialize(void);
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#else
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# define nxsem_initialize()
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#endif
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/* Wake up a thread that is waiting on semaphore */
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void nxsem_wait_irq(FAR struct tcb_s *wtcb, int errcode);
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/* Handle semaphore timer expiration */
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void nxsem_timeout(wdparm_t arg);
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/* Recover semaphore resources with a task or thread is destroyed */
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void nxsem_recover(FAR struct tcb_s *tcb);
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/* Special logic needed only by priority inheritance to manage collections of
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* holders of semaphores.
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*/
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#ifdef CONFIG_PRIORITY_INHERITANCE
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void nxsem_initialize_holders(void);
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void nxsem_destroyholder(FAR sem_t *sem);
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void nxsem_add_holder(FAR sem_t *sem);
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void nxsem_add_holder_tcb(FAR struct tcb_s *htcb, FAR sem_t *sem);
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void nxsem_boost_priority(FAR sem_t *sem);
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void nxsem_release_holder(FAR sem_t *sem);
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void nxsem_restore_baseprio(FAR struct tcb_s *stcb, FAR sem_t *sem);
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void nxsem_canceled(FAR struct tcb_s *stcb, FAR sem_t *sem);
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void nxsem_release_all(FAR struct tcb_s *stcb);
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#else
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# define nxsem_initialize_holders()
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# define nxsem_destroyholder(sem)
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# define nxsem_add_holder(sem)
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# define nxsem_add_holder_tcb(htcb,sem)
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# define nxsem_boost_priority(sem)
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# define nxsem_release_holder(sem)
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# define nxsem_restore_baseprio(stcb,sem)
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# define nxsem_canceled(stcb,sem)
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# define nxsem_release_all(stcb)
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#endif
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/* Special logic needed only by priority protect */
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#ifdef CONFIG_PRIORITY_PROTECT
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int nxsem_protect_wait(FAR sem_t *sem);
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void nxsem_protect_post(FAR sem_t *sem);
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#else
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# define nxsem_protect_wait(sem) 0
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# define nxsem_protect_post(sem)
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#endif
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* __SCHED_SEMAPHORE_SEMAPHORE_H */
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