Resync new repository with old repo r5166

git-svn-id: http://svn.code.sf.net/p/nuttx/code/trunk@5153 42af7a65-404d-4744-a932-0658087f49c3
2026-10-29 16:13:36 +08:00 · 2012-09-17 18:18:44 +00:00
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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 */
+