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Side by Side Diff: sdk/lib/async/timer.dart

Issue 3003853002: Add ticks counter to Timer. (Closed)
Patch Set: Test that tick increments by more than one Created 3 years, 3 months ago
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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a 2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file. 3 // BSD-style license that can be found in the LICENSE file.
4 4
5 part of dart.async; 5 part of dart.async;
6 6
7 /** 7 /**
8 * A count-down timer that can be configured to fire once or repeatedly. 8 * A count-down timer that can be configured to fire once or repeatedly.
9 * 9 *
10 * The timer counts down from the specified duration to 0. 10 * The timer counts down from the specified duration to 0.
(...skipping 78 matching lines...) Expand 10 before | Expand all | Expand 10 after
89 static void run(void callback()) { 89 static void run(void callback()) {
90 new Timer(Duration.ZERO, callback); 90 new Timer(Duration.ZERO, callback);
91 } 91 }
92 92
93 /** 93 /**
94 * Cancels the timer. 94 * Cancels the timer.
95 */ 95 */
96 void cancel(); 96 void cancel();
97 97
98 /** 98 /**
99 * The number of durations preceeding the most recent timer event.
floitsch 2017/09/21 23:06:45 preceding
100 *
101 * The value starts at zero and is incremented each time a timer event
102 * occurs, so each callback will see a larger value than the previous one.
103 *
104 * If a periodic timer with a non-zero duration is delayed too much,
105 * so more than one tick should have happened,
106 * all but the last tick in the past are considered "missed",
107 * and no callback is invoked for them.
108 * The [tick] count reflects the number of durations that have passed and
109 * not the number of callback invocations that have happened.
110 */
111 int get tick;
112
113 /**
99 * Returns whether the timer is still active. 114 * Returns whether the timer is still active.
100 * 115 *
101 * A non-periodic timer is active if the callback has not been executed, 116 * A non-periodic timer is active if the callback has not been executed,
102 * and the timer has not been canceled. 117 * and the timer has not been canceled.
103 * 118 *
104 * A periodic timer is active if it has not been canceled. 119 * A periodic timer is active if it has not been canceled.
105 */ 120 */
106 bool get isActive; 121 bool get isActive;
107 122
108 external static Timer _createTimer(Duration duration, void callback()); 123 external static Timer _createTimer(Duration duration, void callback());
109 external static Timer _createPeriodicTimer( 124 external static Timer _createPeriodicTimer(
110 Duration duration, void callback(Timer timer)); 125 Duration duration, void callback(Timer timer));
111 } 126 }
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