1 files changed, 135 insertions, 0 deletions
diff --git a/nuttx/sched/pthread_keycreate.c b/nuttx/sched/pthread_keycreate.c
new file mode 100644
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+++ b/nuttx/sched/pthread_keycreate.c
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+/************************************************************
+ * pthread_keycreate.c
+ *
+ *   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.
+ *
+ ************************************************************/
+
+/************************************************************
+ * Included Files
+ ************************************************************/
+
+#include <sys/types.h>
+#include <sched.h>
+#include <errno.h>
+#include <debug.h>
+#include "pthread_internal.h"
+
+/************************************************************
+ * Definitions
+ ************************************************************/
+
+/************************************************************
+ * Private Type Declarations
+ ************************************************************/
+
+/************************************************************
+ * Global Variables
+ ************************************************************/
+
+/************************************************************
+ * Private Variables
+ ************************************************************/
+
+/************************************************************
+ * Private Functions
+ ************************************************************/
+
+/************************************************************
+ * Public Functions
+ ************************************************************/
+
+/************************************************************
+ * Function:  pthread_key_create
+ *
+ * Description:
+ *   This function creates a thread-specific data key visible
+ *   to all threads in the system.  Although the same key value
+ *   may be used by different threads, the values bound to
+ *   the key by pthread_setspecific() are maintained on a
+ *   per-thread basis and persist for the life of the calling
+ *   thread.
+ *
+ *   Upon key creation, the value NULL will be associated with
+ *   the the new key in all active threads.  Upon thread
+ *   creation, the value NULL will be associated with all
+ *   defined keys in the new thread.
+ *
+ * Parameters:
+ *   key = A pointer to the key to create.
+ *   destructor = An optional destructor() function that may
+ *      be associated with each key that is invoked when a
+ *      thread exits.  However, this argument is ignored in
+ *      the current implementation.
+ *
+ * Return Value:
+ *   If successful, the pthread_key_create() function will
+ *   store the newly created key value at *key and return
+ *   zero (OK).  Otherwise, an error number will be
+ *   returned to indicate the error:
+ *
+ *      EAGAIN - The system lacked sufficient resources
+ *         to create another thread-specific data key, or the
+ *         system-imposed limit on the total number of keys
+ *         pers process {PTHREAD_KEYS_MAX} has been exceeded
+ *      ENONMEM - Insufficient memory exists to create the key.
+ *
+ * Assumptions:
+ *
+ * POSIX Compatibility:
+ *   - The present implementation ignores the destructor
+ *     argument.
+ *
+ ************************************************************/
+
+int pthread_key_create(pthread_key_t *key, void (*destructor)(void*))
+{
+  int ret = EAGAIN;
+
+  /* Check if we have exceeded the system-defined number of keys. */
+
+  if (g_pthread_num_keys < PTHREAD_KEYS_MAX)
+    {
+      /* Return the key value */
+
+      *key = g_pthread_num_keys;
+
+      /* Increment the count of global keys. */
+
+      g_pthread_num_keys++;
+
+      /* Return success. */
+
+      ret = OK;
+    }
+
+  return ret;
+}