зеркало из https://github.com/mozilla/gecko-dev.git
122 строки
4.5 KiB
Plaintext
122 строки
4.5 KiB
Plaintext
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsIEventTarget.idl"
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#include "nsIThread.idl"
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[uuid(ef194cab-3f86-4b61-b132-e5e96a79e5d1)]
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interface nsIThreadPoolListener : nsISupports
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{
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/**
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* Called when a new thread is created by the thread pool. The notification
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* happens on the newly-created thread.
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*/
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void onThreadCreated();
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/**
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* Called when a thread is about to be destroyed by the thread pool. The
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* notification happens on the thread that is about to be destroyed.
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*/
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void onThreadShuttingDown();
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};
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/**
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* An interface to a thread pool. A thread pool creates a limited number of
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* anonymous (unnamed) worker threads. An event dispatched to the thread pool
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* will be run on the next available worker thread.
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*/
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[rust_sync, uuid(76ce99c9-8e43-489a-9789-f27cc4424965)]
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interface nsIThreadPool : nsIEventTarget
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{
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/**
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* Set the entire pool's QoS priority. If the priority has not changed, do nothing.
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* Existing threads will update their QoS priority the next time they become
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* active, and newly created threads will set this QoS priority upon creation.
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*/
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[noscript] void setQoSForThreads(in nsIThread_QoSPriority aPriority);
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/**
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* Shutdown the thread pool. This method may not be executed from any thread
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* in the thread pool. Instead, it is meant to be executed from another
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* thread (usually the thread that created this thread pool). When this
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* function returns, the thread pool and all of its threads will be shutdown,
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* and it will no longer be possible to dispatch tasks to the thread pool.
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*
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* As a side effect, events on the current thread will be processed.
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*/
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void shutdown();
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/**
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* Shutdown the thread pool, but only wait for aTimeoutMs. After the timeout
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* expires, any threads that have not shutdown yet are leaked and will not
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* block shutdown.
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*
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* This method should only be used at during shutdown to cleanup threads that
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* made blocking calls to code outside our control, and can't be safely
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* terminated. We choose to leak them intentionally to avoid a shutdown hang.
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*/
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[noscript] void shutdownWithTimeout(in long aTimeoutMs);
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/**
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* Get/set the maximum number of threads allowed at one time in this pool.
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*/
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attribute unsigned long threadLimit;
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/**
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* Get/set the maximum number of idle threads kept alive.
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*
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* Note that after idleThreadMaximumTimeout ms even these threads will
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* go away. The default is 1.
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* If this is 0, no idle thread will be kept longer than the grace timeout.
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*/
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attribute unsigned long idleThreadLimit;
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/**
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* Get/set the amount of time in milliseconds before an idle thread is
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* destroyed if the pool exceeds idleThreadLimit.
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*
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* This should not be very long, the default value is 100ms.
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*/
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attribute unsigned long idleThreadGraceTimeout;
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/**
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* Get/set the amount of time in milliseconds before an idle thread is
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* destroyed. UINT32_MAX means "forever".
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*
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* This should not be very short, the default value is 60 seconds.
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*/
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attribute unsigned long idleThreadMaximumTimeout;
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/**
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* Get/set the number of bytes reserved for the stack of all threads in
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* the pool. By default this is nsIThreadManager::DEFAULT_STACK_SIZE.
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*/
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attribute unsigned long threadStackSize;
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/**
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* An optional listener that will be notified when a thread is created or
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* destroyed in the course of the thread pool's operation.
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*
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* A listener will only receive notifications about threads created after the
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* listener is set so it is recommended that the consumer set the listener
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* before dispatching the first event. A listener that receives an
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* onThreadCreated() notification is guaranteed to always receive the
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* corresponding onThreadShuttingDown() notification.
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*
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* The thread pool takes ownership of the listener and releases it when the
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* shutdown() method is called. Threads created after the listener is set will
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* also take ownership of the listener so that the listener will be kept alive
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* long enough to receive the guaranteed onThreadShuttingDown() notification.
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*/
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attribute nsIThreadPoolListener listener;
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/**
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* Set the label for threads in the pool. All threads will be named
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* "<aName> #<n>", where <n> is a serial number.
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*/
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void setName(in ACString aName);
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};
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