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