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diff --git a/cpukit/include/rtems/posix/threadsup.h b/cpukit/include/rtems/posix/threadsup.h
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+++ b/cpukit/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/thread.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 {
+  /**
+   * @brief Control block for the sporadic server scheduling policy.
+   */
+  struct {
+    /** The thread of this sporadic control block */
+    Thread_Control *thread;
+
+    /**
+     * @brief This is the timer which controls when the thread executes at high
+     * and low priority when using the sporadic server scheduling policy.
+     */
+    Watchdog_Control Timer;
+
+    /**
+     * @brief The low priority when using the sporadic server scheduling
+     * policy.
+     */
+    Priority_Node Low_priority;
+
+    /**
+     * @brief Replenishment period for sporadic server.
+     */
+    struct timespec sched_ss_repl_period;
+
+    /**
+     * @brief Initial budget for sporadic server.
+     */
+    struct timespec sched_ss_init_budget;
+
+    /**
+     * @brief Maximum pending replenishments.
+     *
+     * Only used by pthread_getschedparam() and pthread_getattr_np().
+    */
+    int sched_ss_max_repl;
+  } Sporadic;
+
+  /** This is the set of signals which are currently unblocked. */
+  sigset_t                signals_unblocked;
+  /** 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_API_Control;
+
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+/* end of include file */