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* Added a Dano extension to BMessageQueue: IsNextMessage().

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* BLooper::AddMessage() is now using this method to determine wether or not to
  update its looper thread.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19956 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler 2007-01-25 17:08:16 +00:00
parent 6181d22fb0
commit ca9b91886d
3 changed files with 25 additions and 7 deletions
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3
headers/os/app/MessageQueue.h
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@ -1,5 +1,5 @@
/*
* Copyright 2001-2005, Haiku, Inc. All Rights Reserved.
* Copyright 2001-2007, Haiku, Inc. All Rights Reserved.
* Distributed under the terms of the MIT License.
*/
#ifndef _MESSAGE_QUEUE_H
@ -30,6 +30,7 @@ class BMessageQueue {
bool IsLocked() const;
BMessage *NextMessage();
bool IsNextMessage(const BMessage* message) const;
private:
// Reserved space in the vtable for future changes to BMessageQueue

15
src/kits/app/Looper.cpp
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@ -1,5 +1,5 @@
/*
* Copyright 2001-2005, Haiku.
* Copyright 2001-2007, Haiku.
* Distributed under the terms of the MIT License.
*
* Authors:
@ -9,7 +9,7 @@
* Axel Dörfler, axeld@pinc-software.de
*/
/** BLooper class spawns a thread that runs a message loop. */
/*! BLooper class spawns a thread that runs a message loop. */
/**
@note Although I'm implementing "by the book" for now, I would like to
@ -1076,11 +1076,16 @@ BLooper::InitData(const char *name, int32 priority, int32 portCapacity)
void
BLooper::AddMessage(BMessage* msg)
BLooper::AddMessage(BMessage* message)
{
_AddMessagePriv(msg);
_AddMessagePriv(message);
// ToDo: if called from a different thread, we need to wake up the looper
// wakeup looper when being called from other threads if necessary
if (find_thread(NULL) != Thread()
&& fQueue->IsNextMessage(message) && port_count(fMsgPort) <= 0) {
// there is currently no message waiting, and we need to wakeup the looper
write_port_etc(fMsgPort, 0, NULL, 0, B_RELATIVE_TIMEOUT, 0);
}
}

14
src/kits/app/MessageQueue.cpp
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@ -1,5 +1,5 @@
/*
* Copyright 2001-2005, Haiku, Inc. All Rights Reserved.
* Copyright 2001-2007, Haiku, Inc. All Rights Reserved.
* Distributed under the terms of the MIT License.
*
* Authors:
@ -262,6 +262,18 @@ BMessageQueue::NextMessage()
}
/*!
\brief Checks wether or not the specified \a message is the message
you would get when calling NextMessage().
*/
bool
BMessageQueue::IsNextMessage(const BMessage* message) const
{
BAutolock _(fLock);
return fHead == message;
}
/*!
\brief This method is only here for R5 binary compatibility!
It should be dropped as soon as possible (it misses the const qualifier).