gecko-dev/xpcom/glue/nsThreadUtils.cpp

259 lines
6.5 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla code.
*
* The Initial Developer of the Original Code is Google Inc.
* Portions created by the Initial Developer are Copyright (C) 2006
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Darin Fisher <darin@meer.net>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsThreadUtils.h"
#ifdef MOZILLA_INTERNAL_API
# include "nsThreadManager.h"
#else
# include "nsXPCOMCIDInternal.h"
# include "nsIThreadManager.h"
# include "nsServiceManagerUtils.h"
#endif
#ifdef XP_WIN
#include <windows.h>
#endif
#ifndef XPCOM_GLUE_AVOID_NSPR
NS_IMPL_THREADSAFE_ISUPPORTS1(nsRunnable, nsIRunnable)
NS_IMETHODIMP
nsRunnable::Run()
{
// Do nothing
return NS_OK;
}
#endif // XPCOM_GLUE_AVOID_NSPR
//-----------------------------------------------------------------------------
NS_METHOD
NS_NewThread(nsIThread **result, nsIRunnable *event)
{
nsCOMPtr<nsIThread> thread;
#ifdef MOZILLA_INTERNAL_API
nsresult rv = nsThreadManager::get()->
nsThreadManager::NewThread(0, getter_AddRefs(thread));
#else
nsresult rv;
nsCOMPtr<nsIThreadManager> mgr =
do_GetService(NS_THREADMANAGER_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = mgr->NewThread(0, getter_AddRefs(thread));
#endif
NS_ENSURE_SUCCESS(rv, rv);
if (event) {
rv = thread->Dispatch(event, NS_DISPATCH_NORMAL);
NS_ENSURE_SUCCESS(rv, rv);
}
*result = nsnull;
thread.swap(*result);
return NS_OK;
}
NS_METHOD
NS_GetCurrentThread(nsIThread **result)
{
#ifdef MOZILLA_INTERNAL_API
return nsThreadManager::get()->nsThreadManager::GetCurrentThread(result);
#else
nsresult rv;
nsCOMPtr<nsIThreadManager> mgr =
do_GetService(NS_THREADMANAGER_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
return mgr->GetCurrentThread(result);
#endif
}
NS_METHOD
NS_GetMainThread(nsIThread **result)
{
#ifdef MOZILLA_INTERNAL_API
return nsThreadManager::get()->nsThreadManager::GetMainThread(result);
#else
nsresult rv;
nsCOMPtr<nsIThreadManager> mgr =
do_GetService(NS_THREADMANAGER_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
return mgr->GetMainThread(result);
#endif
}
#ifndef MOZILLA_INTERNAL_API
bool NS_IsMainThread()
{
PRBool result = PR_FALSE;
nsCOMPtr<nsIThreadManager> mgr =
do_GetService(NS_THREADMANAGER_CONTRACTID);
if (mgr)
mgr->GetIsMainThread(&result);
return bool(result);
}
#elif defined(XP_WIN)
extern DWORD gTLSIsMainThreadIndex;
bool
NS_IsMainThread()
{
return !!TlsGetValue(gTLSIsMainThreadIndex);
}
#elif !defined(NS_TLS)
bool NS_IsMainThread()
{
PRBool result = PR_FALSE;
nsThreadManager::get()->nsThreadManager::GetIsMainThread(&result);
return bool(result);
}
#elif !defined(MOZ_ENABLE_LIBXUL)
bool NS_IsMainThread()
{
return gTLSIsMainThread;
}
#endif
NS_METHOD
NS_DispatchToCurrentThread(nsIRunnable *event)
{
#ifdef MOZILLA_INTERNAL_API
nsIThread *thread = NS_GetCurrentThread();
if (!thread) { return NS_ERROR_UNEXPECTED; }
#else
nsCOMPtr<nsIThread> thread;
nsresult rv = NS_GetCurrentThread(getter_AddRefs(thread));
NS_ENSURE_SUCCESS(rv, rv);
#endif
return thread->Dispatch(event, NS_DISPATCH_NORMAL);
}
NS_METHOD
NS_DispatchToMainThread(nsIRunnable *event, PRUint32 dispatchFlags)
{
nsCOMPtr<nsIThread> thread;
nsresult rv = NS_GetMainThread(getter_AddRefs(thread));
NS_ENSURE_SUCCESS(rv, rv);
return thread->Dispatch(event, dispatchFlags);
}
#ifndef XPCOM_GLUE_AVOID_NSPR
NS_METHOD
NS_ProcessPendingEvents(nsIThread *thread, PRIntervalTime timeout)
{
nsresult rv = NS_OK;
#ifdef MOZILLA_INTERNAL_API
if (!thread) {
thread = NS_GetCurrentThread();
NS_ENSURE_STATE(thread);
}
#else
nsCOMPtr<nsIThread> current;
if (!thread) {
rv = NS_GetCurrentThread(getter_AddRefs(current));
NS_ENSURE_SUCCESS(rv, rv);
thread = current.get();
}
#endif
PRIntervalTime start = PR_IntervalNow();
for (;;) {
PRBool processedEvent;
rv = thread->ProcessNextEvent(PR_FALSE, &processedEvent);
if (NS_FAILED(rv) || !processedEvent)
break;
if (PR_IntervalNow() - start > timeout)
break;
}
return rv;
}
#endif // XPCOM_GLUE_AVOID_NSPR
inline PRBool
hasPendingEvents(nsIThread *thread)
{
PRBool val;
return NS_SUCCEEDED(thread->HasPendingEvents(&val)) && val;
}
PRBool
NS_HasPendingEvents(nsIThread *thread)
{
if (!thread) {
#ifndef MOZILLA_INTERNAL_API
nsCOMPtr<nsIThread> current;
NS_GetCurrentThread(getter_AddRefs(current));
return hasPendingEvents(current);
#else
thread = NS_GetCurrentThread();
NS_ENSURE_TRUE(thread, PR_FALSE);
#endif
}
return hasPendingEvents(thread);
}
PRBool
NS_ProcessNextEvent(nsIThread *thread, PRBool mayWait)
{
#ifdef MOZILLA_INTERNAL_API
if (!thread) {
thread = NS_GetCurrentThread();
NS_ENSURE_TRUE(thread, PR_FALSE);
}
#else
nsCOMPtr<nsIThread> current;
if (!thread) {
NS_GetCurrentThread(getter_AddRefs(current));
NS_ENSURE_TRUE(current, PR_FALSE);
thread = current.get();
}
#endif
PRBool val;
return NS_SUCCEEDED(thread->ProcessNextEvent(mayWait, &val)) && val;
}
#ifdef MOZILLA_INTERNAL_API
nsIThread *
NS_GetCurrentThread() {
return nsThreadManager::get()->GetCurrentThread();
}
#endif