AggregateException.php
3 years ago
CancellationException.php
3 years ago
Coroutine.php
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Create.php
3 years ago
Each.php
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EachPromise.php
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FulfilledPromise.php
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Is.php
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Promise.php
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PromiseInterface.php
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PromisorInterface.php
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RejectedPromise.php
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RejectionException.php
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TaskQueue.php
3 years ago
TaskQueueInterface.php
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Utils.php
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functions.php
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functions_include.php
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TaskQueue.php
68 lines
| 1 | <?php |
| 2 | |
| 3 | namespace GuzzleHttp\Promise; |
| 4 | |
| 5 | /** |
| 6 | * A task queue that executes tasks in a FIFO order. |
| 7 | * |
| 8 | * This task queue class is used to settle promises asynchronously and |
| 9 | * maintains a constant stack size. You can use the task queue asynchronously |
| 10 | * by calling the `run()` function of the global task queue in an event loop. |
| 11 | * |
| 12 | * GuzzleHttp\Promise\Utils::queue()->run(); |
| 13 | */ |
| 14 | class TaskQueue implements TaskQueueInterface |
| 15 | { |
| 16 | private $enableShutdown = true; |
| 17 | private $queue = []; |
| 18 | |
| 19 | public function __construct($withShutdown = true) |
| 20 | { |
| 21 | if ($withShutdown) { |
| 22 | register_shutdown_function(function () { |
| 23 | if ($this->enableShutdown) { |
| 24 | // Only run the tasks if an E_ERROR didn't occur. |
| 25 | $err = error_get_last(); |
| 26 | if (!$err || ($err['type'] ^ E_ERROR)) { |
| 27 | $this->run(); |
| 28 | } |
| 29 | } |
| 30 | }); |
| 31 | } |
| 32 | } |
| 33 | |
| 34 | public function isEmpty() |
| 35 | { |
| 36 | return !$this->queue; |
| 37 | } |
| 38 | |
| 39 | public function add(callable $task) |
| 40 | { |
| 41 | $this->queue[] = $task; |
| 42 | } |
| 43 | |
| 44 | public function run() |
| 45 | { |
| 46 | while ($task = array_shift($this->queue)) { |
| 47 | /** @var callable $task */ |
| 48 | $task(); |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | /** |
| 53 | * The task queue will be run and exhausted by default when the process |
| 54 | * exits IFF the exit is not the result of a PHP E_ERROR error. |
| 55 | * |
| 56 | * You can disable running the automatic shutdown of the queue by calling |
| 57 | * this function. If you disable the task queue shutdown process, then you |
| 58 | * MUST either run the task queue (as a result of running your event loop |
| 59 | * or manually using the run() method) or wait on each outstanding promise. |
| 60 | * |
| 61 | * Note: This shutdown will occur before any destructors are triggered. |
| 62 | */ |
| 63 | public function disableShutdown() |
| 64 | { |
| 65 | $this->enableShutdown = false; |
| 66 | } |
| 67 | } |
| 68 |