1 files changed, 110 insertions, 0 deletions
diff --git a/source/application/hal/platforms/native/timer/native_timer.cc b/source/application/hal/platforms/native/timer/native_timer.cc
new file mode 100644
index 0000000..c115f4d
--- /dev/null
+++ b/source/application/hal/platforms/native/timer/native_timer.cc
@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2021 Arm Limited. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "timer.h"
+
+#include <cassert>
+#include <ctime>
+#include <cstring>
+
+#define MILLISECONDS_IN_SECOND      1000
+#define MICROSECONDS_IN_SECOND      1000000
+#define NANOSECONDS_IN_MILLISECOND  1000000
+#define NANOSECONDS_IN_MICROSECOND  1000
+
+/**
+ * @brief   Gets the current time counter value.
+ * @return  Counter value expressed in terms of time_counter struct.
+ **/
+static time_counter get_time_counter(void)
+{
+    struct timespec current_time{};
+    clock_gettime(1, &current_time);
+    time_counter t = {
+        .current_secs = current_time.tv_sec,
+        .current_nsecs = current_time.tv_nsec
+    };
+
+    return t;
+}
+
+/**
+ * @brief       Gets the time duration elapsed between start and end.
+ * @param[in]   start   Pointer to time_counter value at start time.
+ * @param[in]   end     Pointer to time_counter value at end.
+ * @return      Difference in milliseconds between the arguments expressed
+ *              as unsigned 32 bit integer.
+ **/
+static time_t get_duration_milliseconds(time_counter *start, time_counter *end)
+{
+    /* Convert both parts of time struct to ms then add for complete time. */
+    time_t seconds_part =
+        (end->current_secs - start->current_secs) * MILLISECONDS_IN_SECOND;
+    time_t nanoseconds_part =
+        (end->current_nsecs - start->current_nsecs) / NANOSECONDS_IN_MILLISECOND;
+
+    return seconds_part + nanoseconds_part;
+}
+
+/**
+ * @brief       Gets the time duration elapsed between start and end.
+ * @param[in]   start   Pointer to time_counter value at start time.
+ * @param[in]   end     Pointer to time_counter value at end.
+ * @return      Difference in microseconds between the arguments expressed
+ *              as unsigned 32 bit integer.
+ **/
+static time_t get_duration_microseconds(time_counter *start, time_counter *end)
+{
+    /* Convert both parts of time struct to us then add for complete time. */
+    time_t seconds_part =
+        (end->current_secs - start->current_secs) * MICROSECONDS_IN_SECOND;
+    time_t nanoseconds_part =
+        (end->current_nsecs - start->current_nsecs) / NANOSECONDS_IN_MICROSECOND;
+
+    return seconds_part + nanoseconds_part;
+}
+
+/**
+ * @brief Stub for timer reset.
+ **/
+void reset_timer() {}
+
+/**
+ * @brief Initialise the timer for this platform.
+ **/
+void init_timer(platform_timer *timer)
+{
+    assert(timer);
+    memset(timer, 0, sizeof(*timer));
+
+    timer->get_time_counter = get_time_counter;
+    timer->start_profiling = get_time_counter;
+    timer->stop_profiling = get_time_counter;
+    timer->get_duration_ms = get_duration_milliseconds;
+    timer->cap.duration_ms = 1;
+    timer->get_duration_us = get_duration_microseconds;
+    timer->cap.duration_us = 1;
+    timer->reset = reset_timer;
+    timer->inited = 1;
+}
+
+#ifdef __cplusplus
+}
+#endif