b08a86171f
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3 42af7a65-404d-4744-a932-0658087f49c3
130 lines
4.5 KiB
C
130 lines
4.5 KiB
C
/************************************************************
|
|
* pthread_internal.h
|
|
*
|
|
* Copyright (C) 2007 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
|
|
*
|
|
* 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 Gregory Nutt 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 __PTHREAD_INTERNAL_H
|
|
#define __PTHREAD_INTERNAL_H
|
|
|
|
/************************************************************
|
|
* Included Files
|
|
************************************************************/
|
|
|
|
#include <sys/types.h>
|
|
#include <pthread.h>
|
|
#include <nuttx/compiler.h>
|
|
|
|
/************************************************************
|
|
* 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
|
|
{
|
|
struct join_s *next; /* Implements link list */
|
|
boolean started; /* TRUE: pthread started. */
|
|
boolean detached; /* TRUE: pthread_detached'ed */
|
|
boolean 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 join_t *g_pthread_head;
|
|
extern 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 ubyte g_pthread_num_keys;
|
|
|
|
/* Default pthread attributes */
|
|
|
|
extern pthread_attr_t g_default_pthread_attr;
|
|
|
|
/************************************************************
|
|
* 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, void *exit_value);
|
|
EXTERN join_t *pthread_findjoininfo(int pid);
|
|
EXTERN int pthread_givesemaphore(sem_t *sem);
|
|
EXTERN join_t *pthread_removejoininfo(int pid);
|
|
EXTERN int pthread_takesemaphore(sem_t *sem);
|
|
|
|
#undef EXTERN
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* __PTHREAD_INTERNAL_H */
|
|
|