100 lines
3.5 KiB
C
100 lines
3.5 KiB
C
/************************************************************
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* sem_internal.h
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*
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* Copyright (C) 2007 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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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 Gregory Nutt 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 __SEM_INTERNAL_H
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#define __SEM_INTERNAL_H
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/************************************************************
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* Included Files
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************************************************************/
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#include <sys/types.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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#include <nuttx/compiler.h>
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/************************************************************
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* 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 nconnect; /* Number of connections to semaphore */
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FAR char *name; /* Semaphore name (NULL if un-named) */
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boolean 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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EXTERN void weak_function sem_initialize(void);
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EXTERN void sem_waitirq(FAR _TCB *wtcb);
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EXTERN FAR nsem_t *sem_findnamed(const char *name);
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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 /* __SEM_INTERNAL_H */
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