1 files changed, 118 insertions, 0 deletions
diff --git a/os/hal/include/tm.h b/os/hal/include/tm.h
new file mode 100644
index 000000000..14578a167
--- /dev/null
+++ b/os/hal/include/tm.h
@@ -0,0 +1,118 @@
+/*
+    ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
+                 2011,2012,2013 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    tm.h
+ * @brief   Time Measurement driver header.
+ *
+ * @addtogroup TM
+ * @{
+ */
+
+#ifndef _TM_H_
+#define _TM_H_
+
+#if HAL_USE_TM || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver constants.                                                         */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver pre-compile time settings.                                         */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Derived constants and error checks.                                       */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver data structures and types.                                         */
+/*===========================================================================*/
+
+/**
+ * @brief   Type of a Time Measurement object.
+ * @note    Start/stop of measurements is performed through the function
+ *          pointers in order to avoid inlining of those functions which
+ *          could compromise measurement accuracy.
+ * @note    The maximum measurable time period depends on the implementation
+ *          of the realtime counter in the HAL driver.
+ * @note    The measurement is not 100% cycle-accurate, it can be in excess
+ *          of few cycles depending on the compiler and target architecture.
+ * @note    Interrupts can affect measurement if the measurement is performed
+ *          with interrupts enabled.
+ */
+typedef struct TimeMeasurement TimeMeasurement;
+
+/**
+ * @brief   Time Measurement structure.
+ */
+struct TimeMeasurement {
+  void (*start)(TimeMeasurement *tmp);  /**< @brief Starts a measurement.   */
+  void (*stop)(TimeMeasurement *tmp);   /**< @brief Stops a measurement.    */
+  halrtcnt_t           last;            /**< @brief Last measurement.       */
+  halrtcnt_t           worst;           /**< @brief Worst measurement.      */
+  halrtcnt_t           best;            /**< @brief Best measurement.       */
+};
+
+/*===========================================================================*/
+/* Driver macros.                                                            */
+/*===========================================================================*/
+
+/**
+ * @brief   Starts a measurement.
+ * @pre     The @p TimeMeasurement must be initialized.
+ * @note    This function can be invoked in any context.
+ *
+ * @param[in,out] tmp   pointer to a @p TimeMeasurement structure
+ *
+ * @special
+ */
+#define tmStartMeasurement(tmp) (tmp)->start(tmp)
+
+/**
+ * @brief   Stops a measurement.
+ * @pre     The @p TimeMeasurement must be initialized.
+ * @note    This function can be invoked in any context.
+ *
+ * @param[in,out] tmp   pointer to a @p TimeMeasurement structure
+ *
+ * @special
+ */
+#define tmStopMeasurement(tmp) (tmp)->stop(tmp)
+
+/*===========================================================================*/
+/* External declarations.                                                    */
+/*===========================================================================*/
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+  void tmInit(void);
+  void tmObjectInit(TimeMeasurement *tmp);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* HAL_USE_TM */
+
+#endif /* _TM_H_ */
+
+/** @} */