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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=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
#include "MessagePump.h"
#include <Foundation/Foundation.h>
#include "base/scoped_nsautorelease_pool.h"
#include "mozilla/ProfilerMarkers.h"
#include "nsISupportsImpl.h"
using namespace mozilla::ipc;
static void NoOp(void* info) {}
NS_IMPL_ADDREF_INHERITED(MessagePumpForNonMainUIThreads, MessagePump)
NS_IMPL_RELEASE_INHERITED(MessagePumpForNonMainUIThreads, MessagePump)
NS_IMPL_QUERY_INTERFACE(MessagePumpForNonMainUIThreads, nsIThreadObserver)
MessagePumpForNonMainUIThreads::MessagePumpForNonMainUIThreads(
nsISerialEventTarget* aEventTarget)
: mEventTarget(aEventTarget), keep_running_(true) {
MOZ_ASSERT(mEventTarget);
CFRunLoopSourceContext source_context = CFRunLoopSourceContext();
source_context.perform = NoOp;
quit_source_ = CFRunLoopSourceCreate(nullptr, // allocator
0, // priority
&source_context);
CFRunLoopAddSource(run_loop(), quit_source_, kCFRunLoopCommonModes);
}
MessagePumpForNonMainUIThreads::~MessagePumpForNonMainUIThreads() {
CFRunLoopRemoveSource(run_loop(), quit_source_, kCFRunLoopCommonModes);
CFRelease(quit_source_);
}
void MessagePumpForNonMainUIThreads::DoRun(
base::MessagePump::Delegate* aDelegate) {
// If this is a chromium thread and no nsThread is associated with it, this
// call will create a new nsThread.
nsIThread* thread = NS_GetCurrentThread();
MOZ_ASSERT(thread);
// Set the main thread observer so we can wake up when xpcom events need to
// get processed.
nsCOMPtr<nsIThreadInternal> ti(do_QueryInterface(thread));
MOZ_ASSERT(ti);
ti->SetObserver(this);
base::ScopedNSAutoreleasePool autoReleasePool;
while (keep_running_) {
// Drain the xpcom event loop first.
if (NS_ProcessNextEvent(nullptr, false)) {
continue;
}
autoReleasePool.Recycle();
if (!keep_running_) {
break;
}
// Now process the CFRunLoop. It exits after running once.
// NSRunLoop manages autorelease pools itself.
[[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode
beforeDate:[NSDate distantFuture]];
}
ti->SetObserver(nullptr);
keep_running_ = true;
}
void MessagePumpForNonMainUIThreads::Quit() {
keep_running_ = false;
CFRunLoopSourceSignal(quit_source_);
CFRunLoopWakeUp(run_loop());
}
NS_IMETHODIMP MessagePumpForNonMainUIThreads::OnDispatchedEvent() {
// ScheduleWork will signal an input source to the run loop, making it exit so
// it can process the xpcom event.
ScheduleWork();
return NS_OK;
}
NS_IMETHODIMP
MessagePumpForNonMainUIThreads::OnProcessNextEvent(nsIThreadInternal* thread,
bool mayWait) {
return NS_OK;
}
NS_IMETHODIMP
MessagePumpForNonMainUIThreads::AfterProcessNextEvent(nsIThreadInternal* thread,
bool eventWasProcessed) {
return NS_OK;
}