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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
| commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
| tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /xpcom/threads/nsIThreadManager.idl | |
| parent | Initial commit. (diff) | |
| download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip | |
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'xpcom/threads/nsIThreadManager.idl')
| -rw-r--r-- | xpcom/threads/nsIThreadManager.idl | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/xpcom/threads/nsIThreadManager.idl b/xpcom/threads/nsIThreadManager.idl new file mode 100644 index 0000000000..1001436364 --- /dev/null +++ b/xpcom/threads/nsIThreadManager.idl @@ -0,0 +1,173 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim:set ts=2 sw=2 sts=2 et cindent: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "nsISupports.idl" + +[ptr] native PRThread(PRThread); + native ThreadCreationOptions(nsIThreadManager::ThreadCreationOptions); + +interface nsIEventTarget; +interface nsIRunnable; +interface nsIThread; + +[scriptable, function, uuid(039a227d-0cb7-44a5-a8f9-dbb7071979f2)] +interface nsINestedEventLoopCondition : nsISupports +{ + /** + * Returns true if the current nested event loop should stop spinning. + */ + bool isDone(); +}; + +/** + * An interface for creating and locating nsIThread instances. + */ +[scriptable, uuid(1be89eca-e2f7-453b-8d38-c11ba247f6f3)] +interface nsIThreadManager : nsISupports +{ + /** + * Default number of bytes reserved for a thread's stack, if no stack size + * is specified in newThread(). + * + * Defaults can be a little overzealous for many platforms. + * + * On Linux and OS X, for instance, the default thread stack size is whatever + * getrlimit(RLIMIT_STACK) returns, which is often set at 8MB. Or, on Linux, + * if the stack size is unlimited, we fall back to 2MB. This causes particular + * problems on Linux, which allocates 2MB huge VM pages, and will often + * immediately allocate them for any stacks which are 2MB or larger. + * + * The default on Windows is 1MB, which is a little more reasonable. But the + * vast majority of our threads don't need anywhere near that much space. + * + * ASan, TSan and non-opt builds, however, often need a bit more, so give + * them the platform default. + */ +%{C++ +#if defined(MOZ_ASAN) || defined(MOZ_TSAN) || !defined(__OPTIMIZE__) + static constexpr uint32_t DEFAULT_STACK_SIZE = 0; +#else + static constexpr uint32_t DEFAULT_STACK_SIZE = 256 * 1024; +#endif + + static const uint32_t kThreadPoolStackSize = DEFAULT_STACK_SIZE; + + struct ThreadCreationOptions { + // The size in bytes to reserve for the thread's stack. A value of `0` means + // to use the platform default. + uint32_t stackSize = nsIThreadManager::DEFAULT_STACK_SIZE; + + // If set to `true`, any attempts to dispatch runnables to this thread + // without `DISPATCH_IGNORE_BLOCK_DISPATCH` will fail. + // + // This is intended to be used for threads which are expected to generally + // only service a single runnable (other than thread lifecycle runnables), + // and perform their own event dispatching internaly, such as thread pool + // threads or the timer thread. + bool blockDispatch = false; + + // (Windows-only) Whether the thread should have a MessageLoop capable of + // processing native UI events. Defaults to false. + bool isUiThread = false; + }; +%} + + /** + * Create a new thread (a global, user PRThread) with the specified name. + * + * @param name + * The name of the thread. If it is empty the thread will not be named. + * @param options + * Configuration options for the newly created thread. + * + * @returns + * The newly created nsIThread object. + */ + [noscript] nsIThread newNamedThread(in ACString name, in ThreadCreationOptions options); + + /** + * Get the main thread. + */ + readonly attribute nsIThread mainThread; + + /** + * Get the current thread. If the calling thread does not already have a + * nsIThread associated with it, then a new nsIThread will be created and + * associated with the current PRThread. + */ + readonly attribute nsIThread currentThread; + + /** + * This queues a runnable to the main thread. It's a shortcut for JS callers + * to be used instead of + * .mainThread.dispatch(runnable, Ci.nsIEventTarget.DISPATCH_NORMAL); + * or + * .currentThread.dispatch(runnable, Ci.nsIEventTarget.DISPATCH_NORMAL); + * C++ callers should instead use NS_DispatchToMainThread. + */ + [optional_argc] + void dispatchToMainThread(in nsIRunnable event, [optional] in uint32_t priority); + + /** + * Similar to dispatchToMainThread, but wraps the event with extra + * runnable that allocates nsAutoMicroTask. + */ + [optional_argc] + void dispatchToMainThreadWithMicroTask(in nsIRunnable event, [optional] in uint32_t priority); + + /** + * This queues a runnable to the main thread's idle queue. + * + * @param event + * The event to dispatch. + * @param timeout + * The time in milliseconds until this event should be moved from the idle + * queue to the regular queue if it hasn't been executed by then. If not + * passed or a zero value is specified, the event will never be moved to + * the regular queue. + */ + void idleDispatchToMainThread(in nsIRunnable event, + [optional] in uint32_t timeout); + + /* + * A helper method to dispatch a task through nsIDirectTaskDispatcher to the + * current thread. + */ + void dispatchDirectTaskToCurrentThread(in nsIRunnable event); + + /** + * Enter a nested event loop on the current thread, waiting on, and + * processing events until condition.isDone() returns true. + * + * If condition.isDone() throws, this function will throw as well. + * + * C++ code should not use this function, instead preferring + * mozilla::SpinEventLoopUntil. + */ + void spinEventLoopUntil(in ACString aVeryGoodReasonToDoThis, in nsINestedEventLoopCondition condition); + + /** + * Similar to the previous method, but the spinning of the event loop + * terminates when the quit application shutting down starts. + * + * C++ code should not use this function, instead preferring + * mozilla::SpinEventLoopUntil. + */ + void spinEventLoopUntilOrQuit(in ACString aVeryGoodReasonToDoThis, in nsINestedEventLoopCondition condition); + + /** + * Spin the current thread's event loop until there are no more pending + * events. This could be done with spinEventLoopUntil, but that would + * require access to the current thread from JavaScript, which we are + * moving away from. + */ + void spinEventLoopUntilEmpty(); + + /** + * Return the EventTarget for the main thread. + */ + readonly attribute nsIEventTarget mainThreadEventTarget; +}; |