Milestone 5: deliver embedded RDP sessions and lifecycle hardening

third_party/FreeRDP/libfreerdp/utils/stopwatch.c

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+/**
+ * FreeRDP: A Remote Desktop Protocol Implementation
+ * Stopwatch Utils
+ *
+ * Copyright 2011 Stephen Erisman
+ *
+ * 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.
+ */
+
+#include <freerdp/config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <winpr/sysinfo.h>
+#include <freerdp/utils/stopwatch.h>
+
+static void stopwatch_set_time(UINT64* usecs)
+{
+	const UINT64 ns = winpr_GetTickCount64NS();
+	*usecs = WINPR_TIME_NS_TO_US(ns);
+}
+
+STOPWATCH* stopwatch_create(void)
+{
+	STOPWATCH* sw = (STOPWATCH*)calloc(1, sizeof(STOPWATCH));
+	if (!sw)
+		return nullptr;
+	stopwatch_reset(sw);
+
+	return sw;
+}
+
+void stopwatch_free(STOPWATCH* stopwatch)
+{
+	free(stopwatch);
+}
+
+void stopwatch_start(STOPWATCH* stopwatch)
+{
+	stopwatch_set_time(&stopwatch->start);
+	stopwatch->count++;
+}
+
+void stopwatch_stop(STOPWATCH* stopwatch)
+{
+	stopwatch_set_time(&stopwatch->end);
+	stopwatch->elapsed += (stopwatch->end - stopwatch->start);
+}
+
+void stopwatch_reset(STOPWATCH* stopwatch)
+{
+	stopwatch->start = 0;
+	stopwatch->end = 0;
+	stopwatch->elapsed = 0;
+	stopwatch->count = 0;
+}
+
+double stopwatch_get_elapsed_time_in_seconds(STOPWATCH* stopwatch)
+{
+	const long double ld = stopwatch->elapsed / 1000000.0L;
+	return (double)ld;
+}
+
+void stopwatch_get_elapsed_time_in_useconds(STOPWATCH* stopwatch, UINT32* sec, UINT32* usec)
+{
+	*sec = (UINT32)stopwatch->elapsed / 1000000;
+	*usec = (UINT32)stopwatch->elapsed % 1000000;
+}