a60059d9d0
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@20 42af7a65-404d-4744-a932-0658087f49c3
130 lines
4.5 KiB
C
130 lines
4.5 KiB
C
/************************************************************
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* pthread_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 __PTHREAD_INTERNAL_H
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#define __PTHREAD_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 <pthread.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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/* The following defines an entry in the pthread logic's
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* local data set. Note that this structure is used to
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* implemented a singly linked list. This structure
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* is used (instead of, say, a binary search tree) because
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* the data set will be searched using the pid as
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* a key -- a process IDs will always be created in a
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* 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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boolean started; /* TRUE: pthread started. */
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boolean detached; /* TRUE: pthread_detached'ed */
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boolean 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
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* is used to retain 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
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* the following (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
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* allocated.
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*/
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extern ubyte g_pthread_num_keys;
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/* Default pthread attributes */
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extern FAR pthread_attr_t g_default_pthread_attr;
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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 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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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* __PTHREAD_INTERNAL_H */
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