util_time.h

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/*
 * Copyright 2011-2013 Blender Foundation
 *
 * 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.
 */
 
#ifndef __UTIL_TIME_H__
#define __UTIL_TIME_H__
 
#include "util/util_function.h"
#include "util/util_string.h"
 
CCL_NAMESPACE_BEGIN
 
/* Give current time in seconds in double precision, with good accuracy. */
 
double time_dt();
 
/* Sleep for the specified number of seconds. */
 
void time_sleep(double t);
 
/* Scoped timer. */
 
class scoped_timer {
 public:
  explicit scoped_timer(double *value = NULL) : value_(value)
  {
    time_start_ = time_dt();
  }
 
  ~scoped_timer()
  {
    if (value_ != NULL) {
      *value_ = get_time();
    }
  }
 
  double get_start() const
  {
    return time_start_;
  }
 
  double get_time() const
  {
    return time_dt() - time_start_;
  }
 
 protected:
  double *value_;
  double time_start_;
};
 
class scoped_callback_timer {
 public:
  using callback_type = function<void(double)>;
 
  explicit scoped_callback_timer(callback_type cb) : cb(cb)
  {
  }
 
  ~scoped_callback_timer()
  {
    if (cb) {
      cb(timer.get_time());
    }
  }
 
 protected:
  scoped_timer timer;
  callback_type cb;
};
 
/* Make human readable string from time, compatible with Blender metadata. */
 
string time_human_readable_from_seconds(const double seconds);
double time_human_readable_to_seconds(const string &str);
 
CCL_NAMESPACE_END
 
#endif