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Diffstat (limited to 'nuttx/sched/pthread_internal.h')
| -rw-r--r-- | nuttx/sched/pthread_internal.h | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/nuttx/sched/pthread_internal.h b/nuttx/sched/pthread_internal.h new file mode 100644 index 0000000000..d0b1cdeb9e --- /dev/null +++ b/nuttx/sched/pthread_internal.h @@ -0,0 +1,129 @@ +/************************************************************ + * 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 */ + |