1cc1dd99ae75549ea58170cb13bcc8636625a46c6Gaurav Shah/* Copyright (c) 2010 The Chromium OS Authors. All rights reserved. 2cc1dd99ae75549ea58170cb13bcc8636625a46c6Gaurav Shah * Use of this source code is governed by a BSD-style license that can be 3cc1dd99ae75549ea58170cb13bcc8636625a46c6Gaurav Shah * found in the LICENSE file. 4cc1dd99ae75549ea58170cb13bcc8636625a46c6Gaurav Shah */ 5cc1dd99ae75549ea58170cb13bcc8636625a46c6Gaurav Shah 6cc1dd99ae75549ea58170cb13bcc8636625a46c6Gaurav Shah#include "timer_utils.h" 7cc1dd99ae75549ea58170cb13bcc8636625a46c6Gaurav Shah 8cc1dd99ae75549ea58170cb13bcc8636625a46c6Gaurav Shahvoid StartTimer(ClockTimerState* ct) { 9cc1dd99ae75549ea58170cb13bcc8636625a46c6Gaurav Shah clock_gettime(CLOCK_REALTIME, &ct->start_time); 10cc1dd99ae75549ea58170cb13bcc8636625a46c6Gaurav Shah} 11cc1dd99ae75549ea58170cb13bcc8636625a46c6Gaurav Shah 12cc1dd99ae75549ea58170cb13bcc8636625a46c6Gaurav Shahvoid StopTimer(ClockTimerState* ct) { 13cc1dd99ae75549ea58170cb13bcc8636625a46c6Gaurav Shah clock_gettime(CLOCK_REALTIME, &ct->end_time); 14cc1dd99ae75549ea58170cb13bcc8636625a46c6Gaurav Shah} 15cc1dd99ae75549ea58170cb13bcc8636625a46c6Gaurav Shah 16cc1dd99ae75549ea58170cb13bcc8636625a46c6Gaurav Shahuint32_t GetDurationMsecs(ClockTimerState* ct) { 17cc1dd99ae75549ea58170cb13bcc8636625a46c6Gaurav Shah uint64_t start = ((uint64_t) ct->start_time.tv_sec * 1000000000 + 18cc1dd99ae75549ea58170cb13bcc8636625a46c6Gaurav Shah (uint64_t) ct->start_time.tv_nsec); 19cc1dd99ae75549ea58170cb13bcc8636625a46c6Gaurav Shah uint64_t end = ((uint64_t) ct->end_time.tv_sec * 1000000000 + 20cc1dd99ae75549ea58170cb13bcc8636625a46c6Gaurav Shah (uint64_t) ct->end_time.tv_nsec); 21cc1dd99ae75549ea58170cb13bcc8636625a46c6Gaurav Shah uint64_t duration_msecs = (end - start) / 1000000U; /* Nanoseconds -> 22cc1dd99ae75549ea58170cb13bcc8636625a46c6Gaurav Shah * Milliseconds. */ 23cc1dd99ae75549ea58170cb13bcc8636625a46c6Gaurav Shah return (uint32_t) duration_msecs; 24cc1dd99ae75549ea58170cb13bcc8636625a46c6Gaurav Shah} 25