1 files changed, 81 insertions, 0 deletions
diff --git a/src/include/sys.h b/src/include/sys.h
new file mode 100644
index 000000000..8765c8d49
--- /dev/null
+++ b/src/include/sys.h
@@ -0,0 +1,81 @@
+/*
+    ChibiOS/RT - Copyright (C) 2006-2007 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/>.
+*/
+
+/**
+ * @addtogroup Core
+ * @{
+ */
+
+#ifndef _SYS_H_
+#define _SYS_H_
+
+#if defined(CH_USE_REENTRANT_LOCKS) || defined(_DOXYGEN_)
+/**
+ * Enters the ChibiOS/RT system mutual exclusion zone.
+ * @note The use of system mutual exclusion zone is not recommended in
+ *       the user code, it is a better idea to use the semaphores or mutexes
+ *       instead.
+ * @note The code of this API is always inlined regardless the
+ *       @p CH_OPTIMIZE_SPEED setting. This function is meant to be used in
+ *       places where the performance is always preferred.
+ * @see CH_USE_NESTED_LOCKS
+ */
+#define chSysLockInline() {                                             \
+  if (currp->p_locks == 0) {                                            \
+    currp->p_locks++;                                                   \
+    sys_disable();                                                      \
+  }                                                                     \
+}
+
+/**
+ * Leaves the ChibiOS/RT system mutual exclusion zone.
+ * @note The use of system mutual exclusion zone is not recommended in
+ *       the user code, it is a better idea to use the semaphores or mutexes
+ *       instead.
+ * @note The code of this API is always inlined regardless the
+ *       @p CH_OPTIMIZE_SPEED setting. This function is meant to be used in
+ *       places where the performance is always preferred.
+ * @see CH_USE_NESTED_LOCKS
+ */
+#define chSysUnlockInline() {                                           \
+  if (--currp->p_locks == 0)                                            \
+    sys_enable();                                                       \
+}
+#else /* defined(CH_USE_REENTRANT_LOCKS) || defined(_DOXYGEN_) */
+#define chSysLockInline() sys_disable()
+#define chSysUnlockInline() sys_enable()
+#endif /* !defined(CH_USE_REENTRANT_LOCKS) && !defined(_DOXYGEN_) */
+
+#if defined(CH_OPTIMIZE_SPEED)
+#define chSysLock() chSysLockInline()
+#define chSysUnlock chSysUnlockInline()
+#endif /* defined(CH_OPTIMIZE_SPEED) */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+  void chSysInit(void);
+  void chSysTimerHandlerI(void);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _SYS_H_ */
+
+/** @} */