133 lines
4.5 KiB
C
133 lines
4.5 KiB
C
/****************************************************************************
|
|
* sched/sem_internal.h
|
|
*
|
|
* Copyright (C) 2007, 2009-2013 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. 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.
|
|
* 3. Neither the name NuttX nor the names of its contributors may be
|
|
* used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "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
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS 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.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifndef __SCHED_SEM_INTERNAL_H
|
|
#define __SCHED_SEM_INTERNAL_H
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
#include <nuttx/compiler.h>
|
|
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
#include <semaphore.h>
|
|
#include <sched.h>
|
|
#include <queue.h>
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Type Declarations
|
|
****************************************************************************/
|
|
|
|
/* This is the named semaphore structure */
|
|
|
|
struct nsem_s
|
|
{
|
|
FAR struct nsem_s *flink; /* Forward link */
|
|
FAR struct nsem_s *blink; /* Backward link */
|
|
uint16_t nconnect; /* Number of connections to semaphore */
|
|
FAR char *name; /* Semaphore name (NULL if un-named) */
|
|
bool unlinked; /* true if the semaphore has been unlinked */
|
|
sem_t sem; /* The semaphore itself */
|
|
};
|
|
|
|
typedef struct nsem_s nsem_t;
|
|
|
|
/****************************************************************************
|
|
* Public Variables
|
|
****************************************************************************/
|
|
|
|
/* This is a list of dyanamically allocated named semaphores */
|
|
|
|
extern dq_queue_t g_nsems;
|
|
|
|
/****************************************************************************
|
|
* Public Function Prototypes
|
|
****************************************************************************/
|
|
|
|
#ifdef __cplusplus
|
|
#define EXTERN extern "C"
|
|
extern "C"
|
|
{
|
|
#else
|
|
#define EXTERN extern
|
|
#endif
|
|
|
|
/* Common semaphore logic */
|
|
|
|
void weak_function sem_initialize(void);
|
|
void sem_waitirq(FAR struct tcb_s *wtcb, int errcode);
|
|
FAR nsem_t *sem_findnamed(const char *name);
|
|
|
|
/* Special logic needed only by priority inheritance to manage collections of
|
|
* holders of semaphores.
|
|
*/
|
|
|
|
#ifdef CONFIG_PRIORITY_INHERITANCE
|
|
void sem_initholders(void);
|
|
void sem_destroyholder(FAR sem_t *sem);
|
|
void sem_addholder(FAR sem_t *sem);
|
|
void sem_boostpriority(FAR sem_t *sem);
|
|
void sem_releaseholder(FAR sem_t *sem);
|
|
void sem_restorebaseprio(FAR struct tcb_s *stcb, FAR sem_t *sem);
|
|
# ifndef CONFIG_DISABLE_SIGNALS
|
|
void sem_canceled(FAR struct tcb_s *stcb, FAR sem_t *sem);
|
|
# else
|
|
# define sem_canceled(stcb, sem)
|
|
# endif
|
|
#else
|
|
# define sem_initholders()
|
|
# define sem_destroyholder(sem)
|
|
# define sem_addholder(sem)
|
|
# define sem_boostpriority(sem)
|
|
# define sem_releaseholder(sem)
|
|
# define sem_restorebaseprio(stcb,sem)
|
|
# define sem_canceled(stcb, sem)
|
|
#endif
|
|
|
|
#undef EXTERN
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* __SCHED_SEM_INTERNAL_H */
|
|
|