Timer.cpp 2.3 KB

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  1. /*
  2. * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
  3. * All rights reserved.
  4. *
  5. * Redistribution and use in source and binary forms, with or without
  6. * modification, are permitted provided that the following conditions are met:
  7. *
  8. * 1. Redistributions of source code must retain the above copyright notice, this
  9. * list of conditions and the following disclaimer.
  10. *
  11. * 2. Redistributions in binary form must reproduce the above copyright notice,
  12. * this list of conditions and the following disclaimer in the documentation
  13. * and/or other materials provided with the distribution.
  14. *
  15. * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  16. * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17. * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  18. * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  19. * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20. * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  21. * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  22. * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  23. * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  24. * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25. */
  26. #include <LibCore/Timer.h>
  27. namespace Core {
  28. Timer::Timer(Object* parent)
  29. : Object(parent)
  30. {
  31. }
  32. Timer::Timer(int interval, Function<void()>&& timeout_handler, Object* parent)
  33. : Object(parent)
  34. , on_timeout(move(timeout_handler))
  35. {
  36. start(interval);
  37. }
  38. Timer::~Timer()
  39. {
  40. }
  41. void Timer::start()
  42. {
  43. start(m_interval);
  44. }
  45. void Timer::start(int interval)
  46. {
  47. if (m_active)
  48. return;
  49. m_interval = interval;
  50. start_timer(interval);
  51. m_active = true;
  52. }
  53. void Timer::restart(int interval)
  54. {
  55. if (m_active)
  56. stop();
  57. start(interval);
  58. }
  59. void Timer::stop()
  60. {
  61. if (!m_active)
  62. return;
  63. stop_timer();
  64. m_active = false;
  65. }
  66. void Timer::timer_event(TimerEvent&)
  67. {
  68. if (m_single_shot)
  69. stop();
  70. else {
  71. if (m_interval_dirty) {
  72. stop();
  73. start(m_interval);
  74. }
  75. }
  76. if (on_timeout)
  77. on_timeout();
  78. }
  79. }