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-rw-r--r--vendor/guzzlehttp/promises/src/TaskQueue.php67
1 files changed, 67 insertions, 0 deletions
diff --git a/vendor/guzzlehttp/promises/src/TaskQueue.php b/vendor/guzzlehttp/promises/src/TaskQueue.php
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+++ b/vendor/guzzlehttp/promises/src/TaskQueue.php
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+<?php
+
+namespace GuzzleHttp\Promise;
+
+/**
+ * A task queue that executes tasks in a FIFO order.
+ *
+ * This task queue class is used to settle promises asynchronously and
+ * maintains a constant stack size. You can use the task queue asynchronously
+ * by calling the `run()` function of the global task queue in an event loop.
+ *
+ * GuzzleHttp\Promise\Utils::queue()->run();
+ */
+class TaskQueue implements TaskQueueInterface
+{
+ private $enableShutdown = true;
+ private $queue = [];
+
+ public function __construct($withShutdown = true)
+ {
+ if ($withShutdown) {
+ register_shutdown_function(function () {
+ if ($this->enableShutdown) {
+ // Only run the tasks if an E_ERROR didn't occur.
+ $err = error_get_last();
+ if (!$err || ($err['type'] ^ E_ERROR)) {
+ $this->run();
+ }
+ }
+ });
+ }
+ }
+
+ public function isEmpty()
+ {
+ return !$this->queue;
+ }
+
+ public function add(callable $task)
+ {
+ $this->queue[] = $task;
+ }
+
+ public function run()
+ {
+ while ($task = array_shift($this->queue)) {
+ /** @var callable $task */
+ $task();
+ }
+ }
+
+ /**
+ * The task queue will be run and exhausted by default when the process
+ * exits IFF the exit is not the result of a PHP E_ERROR error.
+ *
+ * You can disable running the automatic shutdown of the queue by calling
+ * this function. If you disable the task queue shutdown process, then you
+ * MUST either run the task queue (as a result of running your event loop
+ * or manually using the run() method) or wait on each outstanding promise.
+ *
+ * Note: This shutdown will occur before any destructors are triggered.
+ */
+ public function disableShutdown()
+ {
+ $this->enableShutdown = false;
+ }
+}