/**************************************************************************** * sched/semaphore/semaphore.h * * Copyright (C) 2007, 2009-2014 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * 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_SEMAPHORE_SEMAPHORE_H #define __SCHED_SEMAPHORE_SEMAPHORE_H /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include #include #include /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /**************************************************************************** * Public Type Declarations ****************************************************************************/ /**************************************************************************** * Public Variables ****************************************************************************/ /**************************************************************************** * Public Function Prototypes ****************************************************************************/ #ifdef __cplusplus #define EXTERN extern "C" extern "C" { #else #define EXTERN extern #endif /* Common semaphore logic */ #ifdef CONFIG_PRIORITY_INHERITANCE void sem_initialize(void); #else # define sem_initialize() #endif #ifndef CONFIG_DISABLE_SIGNALS void sem_waitirq(FAR struct tcb_s *wtcb, int errcode); #endif /* 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_SEMAPHORE_SEMAPHORE_H */