mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-26 06:11:37 +00:00
a8939590de
The bulk of this commit was generated by running:
run-clang-tidy.py \
-checks='-*,llvm-namespace-comment' \
-header-filter=^/.../mozilla-central/.* \
-fix
97 lines
3.2 KiB
C++
97 lines
3.2 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* 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/. */
|
|
|
|
#ifndef mozilla_PreallocatedProcessManager_h
|
|
#define mozilla_PreallocatedProcessManager_h
|
|
|
|
#include "base/basictypes.h"
|
|
#include "nsCOMPtr.h"
|
|
#include "nsIObserver.h"
|
|
|
|
namespace mozilla {
|
|
namespace dom {
|
|
class ContentParent;
|
|
} // namespace dom
|
|
|
|
/**
|
|
* This class manages a ContentParent that it starts up ahead of any particular
|
|
* need. You can then call Take() to get this process and use it. Since we
|
|
* already started it up, it should be ready for use faster than if you'd
|
|
* created the process when you needed it.
|
|
*
|
|
* This class watches the dom.ipc.processPrelaunch.enabled pref. If it changes
|
|
* from false to true, it preallocates a process. If it changes from true to
|
|
* false, it kills the preallocated process, if any.
|
|
*
|
|
* We don't expect this pref to flip between true and false in production, but
|
|
* flipping the pref is important for tests.
|
|
*
|
|
* The static methods here are implemented by forwarding calls on to a
|
|
* PreallocatedProcessManagerImpl singleton class, so if you add a new static
|
|
* method here, you'll need to write a corresponding public method on the
|
|
* singleton.
|
|
*/
|
|
class PreallocatedProcessManager final
|
|
{
|
|
typedef mozilla::dom::ContentParent ContentParent;
|
|
|
|
public:
|
|
/**
|
|
* Create a process after a delay. We wait for a period of time (specified
|
|
* by the dom.ipc.processPrelaunch.delayMs pref), then wait for this process
|
|
* to go idle, then allocate the new process.
|
|
*
|
|
* If the dom.ipc.processPrelaunch.enabled pref is false, or if we already
|
|
* have a preallocated process, this function does nothing.
|
|
*/
|
|
static void AllocateAfterDelay();
|
|
|
|
/**
|
|
* Create a process once this process goes idle.
|
|
*
|
|
* If the dom.ipc.processPrelaunch.enabled pref is false, or if we already
|
|
* have a preallocated process, this function does nothing.
|
|
*/
|
|
static void AllocateOnIdle();
|
|
|
|
/**
|
|
* Create a process right now.
|
|
*
|
|
* If the dom.ipc.processPrelaunch.enabled pref is false, or if we already
|
|
* have a preallocated process, this function does nothing.
|
|
*/
|
|
static void AllocateNow();
|
|
|
|
/**
|
|
* Take the preallocated process, if we have one. If we don't have one, this
|
|
* returns null.
|
|
*
|
|
* If you call Take() twice in a row, the second call is guaranteed to return
|
|
* null.
|
|
*
|
|
* After you Take() the preallocated process, you need to call one of the
|
|
* Allocate* functions (or change the dom.ipc.processPrelaunch pref from
|
|
* false to true) before we'll create a new process.
|
|
*/
|
|
static already_AddRefed<ContentParent> Take();
|
|
|
|
#ifdef MOZ_NUWA_PROCESS
|
|
static void PublishSpareProcess(ContentParent* aContent);
|
|
static void MaybeForgetSpare(ContentParent* aContent);
|
|
static bool IsNuwaReady();
|
|
static void OnNuwaReady();
|
|
static bool PreallocatedProcessReady();
|
|
#endif
|
|
|
|
private:
|
|
PreallocatedProcessManager();
|
|
DISALLOW_EVIL_CONSTRUCTORS(PreallocatedProcessManager);
|
|
};
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif // defined mozilla_PreallocatedProcessManager_h
|