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133 lines
4.9 KiB
133 lines
4.9 KiB
/**************************************************************************** |
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* sched/pthread_internal.h |
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* |
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* Copyright (C) 2007-2009, 2011 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_PTHREAD_INTERNAL_H |
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#define __SCHED_PTHREAD_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 <sys/types.h> |
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#include <stdint.h> |
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#include <stdbool.h> |
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#include <pthread.h> |
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#include <nuttx/compiler.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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/* The following defines an entry in the pthread logic's local data set. |
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* Note that this structure is used to implemented a singly linked list. |
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* This structure is used (instead of, say, a binary search tree) because |
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* the data set will be searched using the pid as a key -- a process IDs will |
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* always be created in a montonically increasing fashion. |
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*/ |
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struct join_s |
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{ |
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FAR struct join_s *next; /* Implements link list */ |
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uint8_t crefs; /* Reference count */ |
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bool started; /* true: pthread started. */ |
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bool detached; /* true: pthread_detached'ed */ |
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bool terminated; /* true: detach'ed+exit'ed */ |
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pthread_t thread; /* Includes pid */ |
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sem_t exit_sem; /* Implements join */ |
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sem_t data_sem; /* Implements join */ |
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pthread_addr_t exit_value; /* Returned data */ |
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}; |
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typedef struct join_s join_t; |
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/**************************************************************************** |
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* Public Variables |
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****************************************************************************/ |
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/* This is the head of a private singly linked list. It is used to retain |
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* information about the spawned threads. |
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*/ |
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extern FAR join_t *g_pthread_head; |
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extern FAR join_t *g_pthread_tail; |
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/* Mutually exclusive access to this data set is enforced with the following |
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* (un-named) semaphore. |
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*/ |
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extern sem_t g_join_semaphore; |
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/* This keys track of the number of global keys that have been allocated. */ |
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extern uint8_t g_pthread_num_keys; |
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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 pthread_initialize(void); |
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EXTERN int pthread_completejoin(pid_t pid, FAR void *exit_value); |
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EXTERN void pthread_destroyjoin(FAR join_t *pjoin); |
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EXTERN FAR join_t *pthread_findjoininfo(pid_t pid); |
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EXTERN int pthread_givesemaphore(sem_t *sem); |
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EXTERN FAR join_t *pthread_removejoininfo(pid_t pid); |
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EXTERN int pthread_takesemaphore(sem_t *sem); |
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#ifdef CONFIG_MUTEX_TYPES |
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EXTERN int pthread_mutexattr_verifytype(int type); |
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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_PTHREAD_INTERNAL_H */ |
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