1 files changed, 88 insertions, 0 deletions
diff --git a/os/kernel/include/chmtx.h b/os/kernel/include/chmtx.h
new file mode 100644
index 000000000..a57e8386a
--- /dev/null
+++ b/os/kernel/include/chmtx.h
@@ -0,0 +1,88 @@
+/*
+    ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 Giovanni Di Sirio.
+
+    This file is part of ChibiOS/RT.
+
+    ChibiOS/RT is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    ChibiOS/RT is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file    mutexes.h
+ * @brief   Mutexes macros and structures.
+ *
+ * @addtogroup mutexes
+ * @{
+ */
+
+#ifndef _MUTEXES_H_
+#define _MUTEXES_H_
+
+#if CH_USE_MUTEXES
+
+/**
+ * @brief Mutex structure.
+ */
+typedef struct Mutex {
+  ThreadsQueue          m_queue;    /**< @brief Queue of the threads sleeping
+                                                on this Mutex.              */
+  Thread                *m_owner;   /**< @brief Owner @p Thread pointer or
+                                                @p NULL.                    */
+  struct Mutex          *m_next;    /**< @brief Next @p Mutex into an
+                                                owner-list or @p NULL.      */
+} Mutex;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+  void chMtxInit(Mutex *mp);
+  void chMtxLock(Mutex *mp);
+  void chMtxLockS(Mutex *mp);
+  bool_t chMtxTryLock(Mutex *mp);
+  bool_t chMtxTryLockS(Mutex *mp);
+  Mutex *chMtxUnlock(void);
+  Mutex *chMtxUnlockS(void);
+  void chMtxUnlockAll(void);
+#ifdef __cplusplus
+}
+#endif
+
+/**
+ * @brief   Data part of a static mutex initializer.
+ * @details This macro should be used when statically initializing a mutex
+ *          that is part of a bigger structure.
+ *
+ * @param[in] name      the name of the mutex variable
+ */
+#define _MUTEX_DATA(name) {_THREADSQUEUE_DATA(name.m_queue), NULL, NULL}
+
+/**
+ * @brief   Static mutex initializer.
+ * @details Statically initialized mutexes require no explicit initialization
+ *          using @p chMtxInit().
+ *
+ * @param[in] name      the name of the mutex variable
+ */
+#define MUTEX_DECL(name) Mutex name = _MUTEX_DATA(name)
+
+/**
+ * @brief   Returns @p TRUE if the mutex queue contains at least a waiting
+ *          thread.
+ */
+#define chMtxQueueNotEmptyS(mp) notempty(&(mp)->m_queue)
+
+#endif /* CH_USE_MUTEXES */
+
+#endif /* _MUTEXES_H_ */
+
+/** @} */