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Diffstat (limited to 'together/node_modules/asap/browser-asap.js')
-rw-r--r-- | together/node_modules/asap/browser-asap.js | 66 |
1 files changed, 0 insertions, 66 deletions
diff --git a/together/node_modules/asap/browser-asap.js b/together/node_modules/asap/browser-asap.js deleted file mode 100644 index 805c982..0000000 --- a/together/node_modules/asap/browser-asap.js +++ /dev/null @@ -1,66 +0,0 @@ -"use strict"; - -// rawAsap provides everything we need except exception management. -var rawAsap = require("./raw"); -// RawTasks are recycled to reduce GC churn. -var freeTasks = []; -// We queue errors to ensure they are thrown in right order (FIFO). -// Array-as-queue is good enough here, since we are just dealing with exceptions. -var pendingErrors = []; -var requestErrorThrow = rawAsap.makeRequestCallFromTimer(throwFirstError); - -function throwFirstError() { - if (pendingErrors.length) { - throw pendingErrors.shift(); - } -} - -/** - * Calls a task as soon as possible after returning, in its own event, with priority - * over other events like animation, reflow, and repaint. An error thrown from an - * event will not interrupt, nor even substantially slow down the processing of - * other events, but will be rather postponed to a lower priority event. - * @param {{call}} task A callable object, typically a function that takes no - * arguments. - */ -module.exports = asap; -function asap(task) { - var rawTask; - if (freeTasks.length) { - rawTask = freeTasks.pop(); - } else { - rawTask = new RawTask(); - } - rawTask.task = task; - rawAsap(rawTask); -} - -// We wrap tasks with recyclable task objects. A task object implements -// `call`, just like a function. -function RawTask() { - this.task = null; -} - -// The sole purpose of wrapping the task is to catch the exception and recycle -// the task object after its single use. -RawTask.prototype.call = function () { - try { - this.task.call(); - } catch (error) { - if (asap.onerror) { - // This hook exists purely for testing purposes. - // Its name will be periodically randomized to break any code that - // depends on its existence. - asap.onerror(error); - } else { - // In a web browser, exceptions are not fatal. However, to avoid - // slowing down the queue of pending tasks, we rethrow the error in a - // lower priority turn. - pendingErrors.push(error); - requestErrorThrow(); - } - } finally { - this.task = null; - freeTasks[freeTasks.length] = this; - } -}; |