1 files changed, 131 insertions, 0 deletions
diff --git a/nuttx/sched/sem_internal.h b/nuttx/sched/sem_internal.h
new file mode 100644
index 000000000..434c551a4
--- /dev/null
+++ b/nuttx/sched/sem_internal.h
@@ -0,0 +1,131 @@
+/****************************************************************************
+ * sched/sem_internal.h
+ *
+ *   Copyright (C) 2007, 2009-2012 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_SEM_INTERNAL_H
+#define __SCHED_SEM_INTERNAL_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <nuttx/compiler.h>
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <semaphore.h>
+#include <sched.h>
+#include <queue.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Type Declarations
+ ****************************************************************************/
+
+/* This is the named semaphore structure */
+
+struct nsem_s
+{
+  FAR struct nsem_s *flink;     /* Forward link */
+  FAR struct nsem_s *blink;     /* Backward link */
+  uint16_t           nconnect;  /* Number of connections to semaphore */
+  FAR char          *name;      /* Semaphore name (NULL if un-named) */
+  bool               unlinked;  /* true if the semaphore has been unlinked */
+  sem_t              sem;       /* The semaphore itself */
+};
+
+typedef struct nsem_s nsem_t;
+
+/****************************************************************************
+ * Public Variables
+ ****************************************************************************/
+
+/* This is a list of dyanamically allocated named semaphores */
+
+extern dq_queue_t g_nsems;
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#ifdef __cplusplus
+#define EXTERN extern "C"
+extern "C" {
+#else
+#define EXTERN extern
+#endif
+
+/* Common semaphore logic */
+
+EXTERN void weak_function sem_initialize(void);
+EXTERN void               sem_waitirq(FAR _TCB *wtcb, int errcode);
+EXTERN FAR nsem_t        *sem_findnamed(const char *name);
+
+/* Special logic needed only by priority inheritance to manage collections of
+ * holders of semaphores.
+ */
+
+#ifdef CONFIG_PRIORITY_INHERITANCE
+EXTERN void sem_initholders(void);
+EXTERN void sem_destroyholder(FAR sem_t *sem);
+EXTERN void sem_addholder(FAR sem_t *sem);
+EXTERN void sem_boostpriority(FAR sem_t *sem);
+EXTERN void sem_releaseholder(FAR sem_t *sem);
+EXTERN void sem_restorebaseprio(FAR _TCB *stcb, FAR sem_t *sem);
+#  ifndef CONFIG_DISABLE_SIGNALS
+EXTERN void sem_canceled(FAR _TCB *stcb, FAR sem_t *sem);
+#  else
+#    define sem_canceled(stcb, sem)
+#  endif
+#else
+#  define sem_initholders()
+#  define sem_destroyholder(sem)
+#  define sem_addholder(sem)
+#  define sem_boostpriority(sem)
+#  define sem_releaseholder(sem)
+#  define sem_restorebaseprio(stcb,sem)
+#  define sem_canceled(stcb, sem)
+#endif
+
+#undef EXTERN
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __SCHED_SEM_INTERNAL_H */
+