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131 lines
4.6 KiB
131 lines
4.6 KiB
/**************************************************************************** |
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* sched/sem_internal.h |
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* |
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* Copyright (C) 2007, 2009-2012 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <gnutt@nuttx.org> |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* 3. Neither the name NuttX nor the names of its contributors may be |
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* used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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****************************************************************************/ |
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#ifndef __SCHED_SEM_INTERNAL_H |
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#define __SCHED_SEM_INTERNAL_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 <stdint.h> |
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#include <stdbool.h> |
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#include <semaphore.h> |
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#include <sched.h> |
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#include <queue.h> |
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/**************************************************************************** |
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* Pre-processor Definitions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Public Type Declarations |
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****************************************************************************/ |
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/* This is the named semaphore structure */ |
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struct nsem_s |
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{ |
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FAR struct nsem_s *flink; /* Forward link */ |
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FAR struct nsem_s *blink; /* Backward link */ |
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uint16_t nconnect; /* Number of connections to semaphore */ |
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FAR char *name; /* Semaphore name (NULL if un-named) */ |
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bool unlinked; /* true if the semaphore has been unlinked */ |
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sem_t sem; /* The semaphore itself */ |
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}; |
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typedef struct nsem_s nsem_t; |
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/**************************************************************************** |
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* Public Variables |
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****************************************************************************/ |
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/* This is a list of dyanamically allocated named semaphores */ |
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extern dq_queue_t g_nsems; |
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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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#else |
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#define EXTERN extern |
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#endif |
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/* Common semaphore logic */ |
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EXTERN void weak_function sem_initialize(void); |
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EXTERN void sem_waitirq(FAR _TCB *wtcb, int errcode); |
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EXTERN FAR nsem_t *sem_findnamed(const char *name); |
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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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EXTERN void sem_initholders(void); |
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EXTERN void sem_destroyholder(FAR sem_t *sem); |
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EXTERN void sem_addholder(FAR sem_t *sem); |
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EXTERN void sem_boostpriority(FAR sem_t *sem); |
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EXTERN void sem_releaseholder(FAR sem_t *sem); |
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EXTERN void sem_restorebaseprio(FAR _TCB *stcb, FAR sem_t *sem); |
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# ifndef CONFIG_DISABLE_SIGNALS |
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EXTERN void sem_canceled(FAR _TCB *stcb, FAR sem_t *sem); |
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# else |
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# define sem_canceled(stcb, sem) |
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# endif |
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#else |
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# define sem_initholders() |
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# define sem_destroyholder(sem) |
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# define sem_addholder(sem) |
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# define sem_boostpriority(sem) |
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# define sem_releaseholder(sem) |
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# define sem_restorebaseprio(stcb,sem) |
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# define sem_canceled(stcb, 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_SEM_INTERNAL_H */ |
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