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diff --git a/include/rtems/posix/threadsup.h b/include/rtems/posix/threadsup.h
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+/**
+ * @file
+ * 
+ * @brief POSIX Thread API Support
+ *
+ * This defines the POSIX thread API extension.
+ */
+
+/*
+ *  COPYRIGHT (c) 1989-2014.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.org/license/LICENSE.
+ */
+
+#ifndef _RTEMS_POSIX_THREADSUP_H
+#define _RTEMS_POSIX_THREADSUP_H
+
+#include <rtems/score/coresem.h>
+#include <rtems/score/thread.h>
+#include <rtems/score/threadq.h>
+#include <rtems/score/watchdog.h>
+
+#include <pthread.h>
+#include <signal.h>
+
+/**
+ *  @defgroup POSIX_THREAD POSIX Thread API Extension
+ *
+ *  @ingroup POSIXAPI
+ * 
+ */
+/**@{**/
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * This defines the POSIX API support structure associated with
+ * each thread in a system with POSIX configured.
+ */
+typedef struct {
+  /** This is the POSIX threads attribute set. */
+  pthread_attr_t          Attributes;
+  /** This indicates whether the thread is attached or detached. */
+  int                     detachstate;
+  /** This is the set of threads waiting for the thread to exit. */
+  Thread_queue_Control    Join_List;
+  /** This is the thread's current scheduling policy. */
+  int                     schedpolicy;
+  /** This is the thread's current set of scheduling parameters. */
+  struct sched_param      schedparam;
+  /**
+   * This is the high priority to execute at when using the sporadic
+   * scheduler.
+   */
+  int                     ss_high_priority;
+  /**
+   * This is the timer which controls when the thread executes at
+   * high and low priority when using the sporadic scheduler.
+   */
+  Watchdog_Control        Sporadic_timer;
+
+  /** This is the set of signals which are currently blocked. */
+  sigset_t                signals_blocked;
+  /** This is the set of signals which are currently pending. */
+  sigset_t                signals_pending;
+
+  /**
+   * @brief Signal post-switch action in case signals are pending.
+   */
+  Thread_Action           Signal_action;
+
+  /*******************************************************************/
+  /*******************************************************************/
+  /***************         POSIX Cancelability         ***************/
+  /*******************************************************************/
+  /*******************************************************************/
+
+  /** This is the cancelability state. */
+  int                     cancelability_state;
+  /** This is the cancelability type. */
+  int                     cancelability_type;
+  /** This indicates if a cancelation has been requested. */
+  int                     cancelation_requested;
+  /**
+   * @brief LIFO list of cleanup contexts.
+   */
+  struct _pthread_cleanup_context *last_cleanup_context;
+} POSIX_API_Control;
+
+/**
+ * @brief POSIX thread exit shared helper.
+ *
+ * 16.1.5.1 Thread Termination, p1003.1c/Draft 10, p. 150
+ *
+ * This method is a helper routine which ensures that all
+ * POSIX thread calls which result in a thread exiting will
+ * do so in the same manner.
+ *
+ * @param[in] the_thread is a pointer to the thread exiting or being canceled
+ * @param[in] value_ptr is a pointer the value to be returned by the thread
+ *
+ * NOTE: Key destructors are executed in the POSIX api delete extension.
+ *
+ */
+void _POSIX_Thread_Exit(
+  Thread_Control *the_thread,
+  void           *value_ptr
+);
+
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+/* end of include file */