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TestThreadedIO.cpp
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TestThreadedIO.cpp
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** 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.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Bill Law <law@netscape.com>
*
* 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 <stdio.h>
#include "nsCOMPtr.h"
#include "nsIEventQueueService.h"
#include "nsIServiceManager.h"
#include "nsIStreamListener.h"
#include "nsIURI.h"
#include "nsNetUtil.h"
//#include "prthread.h"
// This test attempts to load a URL on a separate thread. It is currently
// designed simply to expose the problems inherent in such an ambitous task
// (i.e., it don't work).
// Utility functions...
// Create event queue for current thread.
static nsCOMPtr<nsIEventQueue>
createEventQueue() {
nsCOMPtr<nsIEventQueue> result;
// Get event queue service.
nsresult rv = NS_OK;
nsCOMPtr<nsIEventQueueService> eqs =
do_GetService(NS_EVENTQUEUESERVICE_CONTRACTID, &rv);
if ( NS_SUCCEEDED( rv ) ) {
eqs->GetThreadEventQueue(NS_CURRENT_THREAD, getter_AddRefs(result));
} else {
printf( "%s %d: NS_WITH_SERVICE(nsIEventQueueService) failed, rv=0x%08X\n",
(char*)__FILE__, (int)__LINE__, (int)rv );
}
return result;
}
// Create channel for requested URL.
static nsCOMPtr<nsIChannel>
createChannel( const char *url ) {
nsCOMPtr<nsIInputStream> result;
nsCOMPtr<nsIURI> uri;
printf( "Calling NS_NewURI for %s...\n", url );
nsresult rv = NS_NewURI( getter_AddRefs( uri ), url );
if ( NS_SUCCEEDED( rv ) ) {
printf( "...NS_NewURI completed OK\n" );
// Allocate a new input channel on this thread.
printf( "Calling NS_OpenURI...\n" );
nsresult rv = NS_OpenURI( getter_AddRefs( result ), uri, 0 );
if ( NS_SUCCEEDED( rv ) ) {
printf( "...NS_OpenURI completed OK\n" );
} else {
printf( "%s %d: NS_OpenURI failed, rv=0x%08X\n",
(char*)__FILE__, (int)__LINE__, (int)rv );
}
} else {
printf( "%s %d: NS_NewURI failed, rv=0x%08X\n",
(char*)__FILE__, (int)__LINE__, (int)rv );
}
return result;
}
// Test listener. It basically dumps incoming data to console.
class TestListener : public nsIStreamListener {
public:
NS_DECL_ISUPPORTS
NS_DECL_NSISTREAMLISTENER
NS_DECL_NSISTREAMOBSERVER
TestListener();
~TestListener();
static void IOThread( void *p );
private:
PRBool mDone;
int mThreadNo;
FILE *mFile;
static int threadCount;
}; // class TestListener
int TestListener::threadCount = 0;
TestListener::TestListener()
: mDone( PR_FALSE ), mThreadNo( ++threadCount ) {
printf( "TestListener ctor called on thread %d\n", mThreadNo );
}
TestListener::~TestListener() {
printf( "TestListener dtor called on thread %d\n", mThreadNo );
}
NS_IMPL_ISUPPORTS2( TestListener, nsIStreamListener, nsIRequestObserver )
NS_IMETHODIMP
TestListener::OnStartRequest( nsIChannel *aChannel, nsISupports *aContext ) {
nsresult rv = NS_OK;
printf( "TestListener::OnStartRequest called on thread %d\n", mThreadNo );
// Open output file.
char fileName[32];
sprintf( fileName, "%s%d", "thread", mThreadNo );
mFile = fopen( fileName, "wb" );
setbuf( mFile, 0 );
return rv;
}
NS_IMETHODIMP
TestListener::OnStopRequest( nsIChannel *aChannel,
nsISupports *aContext,
nsresult aStatus,
const PRUnichar *aMsg ) {
nsresult rv = NS_OK;
printf( "TestListener::OnStopRequest called on thread %d\n", mThreadNo );
fclose( mFile );
mDone = PR_TRUE;
return rv;
}
NS_IMETHODIMP
TestListener::OnDataAvailable( nsIChannel *aChannel,
nsISupports *aContext,
nsIInputStream *aStream,
PRUint32 offset,
PRUint32 aLength ) {
nsresult rv = NS_OK;
printf( "TestListener::OnDataAvailable called on thread %d\n", mThreadNo );
// Write the data to the console.
// Read a buffer full till aLength bytes have been processed.
char buffer[ 8192 ];
unsigned long bytesRemaining = aLength;
while ( bytesRemaining ) {
unsigned int bytesRead;
// Read a buffer full or the number remaining (whichever is smaller).
rv = aStream->Read( buffer,
PR_MIN( sizeof( buffer ), bytesRemaining ),
&bytesRead );
if ( NS_SUCCEEDED( rv ) ) {
// Write the bytes just read to the output file.
fwrite( buffer, 1, bytesRead, mFile );
bytesRemaining -= bytesRead;
} else {
printf( "%s %d: Read error, rv=0x%08X\n",
(char*)__FILE__, (int)__LINE__, (int)rv );
break;
}
}
printf( "\n" );
return rv;
}
// IOThread: this function creates a new TestListener object (on the new
// thread), opens a channel, and does AsyncRead to it.
void
TestListener::IOThread( void *p ) {
printf( "I/O thread (0x%08X) started...\n", (int)(void*)PR_GetCurrentThread() );
// Argument is pointer to the nsIEventQueue for the main thread.
nsIEventQueue *mainThreadQ = static_cast<nsIEventQueue*>(p);
// Create channel for random web page.
nsCOMPtr<nsIChannel> channel = createChannel( (const char*)p );
if ( channel ) {
// Create event queue.
nsCOMPtr<nsIEventQueue> ioEventQ = createEventQueue();
if ( ioEventQ ) {
// Create test listener.
TestListener *testListener = new TestListener();
testListener->AddRef();
// Read the channel.
printf( "Doing AsyncRead...\n" );
nsresult rv = channel->AsyncRead( testListener, 0 );
if ( NS_SUCCEEDED( rv ) ) {
printf( "...AsyncRead completed OK\n" );
// Process events till testListener says stop.
printf( "Start event loop on io thread %d...\n", testListener->mThreadNo );
while ( !testListener->mDone ) {
PLEvent *event;
ioEventQ->GetEvent( &event );
ioEventQ->HandleEvent( event );
}
printf( "...io thread %d event loop exiting\n", testListener->mThreadNo );
} else {
printf( "%s %d: AsyncRead failed on thread %d, rv=0x%08X\n",
(char*)__FILE__, (int)__LINE__, testListener->mThreadNo, (int)rv );
}
// Release the test listener.
testListener->Release();
}
}
printf( "...I/O thread terminating\n" );
}
static const int maxThreads = 5;
int
main( int argc, char* argv[] ) {
setbuf( stdout, 0 );
if ( argc < 2 || argc > maxThreads + 1 ) {
printf( "usage: testThreadedIO url1 <url2>...\n"
"where <url#> is a location to be loaded on a separate thread\n"
"limit is %d urls/threads", maxThreads );
return -1;
}
nsresult rv= (nsresult)-1;
printf( "Test starting...\n" );
// Initialize XPCOM.
printf( "Initializing XPCOM...\n" );
rv = NS_InitXPCOM2(nsnull, nsnull, nsnull);
if ( NS_FAILED( rv ) ) {
printf( "%s %d: NS_InitXPCOM failed, rv=0x%08X\n",
(char*)__FILE__, (int)__LINE__, (int)rv );
return rv;
}
printf( "...XPCOM initialized OK\n" );
// Create the Event Queue for this thread...
printf( "Creating event queue for main thread (0x%08X)...\n",
(int)(void*)PR_GetCurrentThread() );
{
nsCOMPtr<nsIEventQueue> mainThreadQ = createEventQueue();
if ( mainThreadQ ) {
printf( "...main thread's event queue created OK\n" );
// Spawn threads to do I/O.
int goodThreads = 0;
PRThread *thread[ maxThreads ];
for ( int threadNo = 1; threadNo < argc; threadNo++ ) {
printf( "Creating I/O thread %d to load %s...\n", threadNo, argv[threadNo] );
PRThread *ioThread = PR_CreateThread( PR_USER_THREAD,
TestListener::IOThread,
argv[threadNo],
PR_PRIORITY_NORMAL,
PR_LOCAL_THREAD,
PR_JOINABLE_THREAD,
0 );
if ( ioThread ) {
thread[ goodThreads++ ] = ioThread;
printf( "...I/O thread %d (0x%08X) created OK\n",
threadNo, (int)(void*)ioThread );
} else {
printf( "%s %d: PR_CreateThread for thread %d failed\n",
(char*)__FILE__, (int)__LINE__, threadNo );
}
}
// Wait for all the threads to terminate.
for ( int joinThread = 0; joinThread < goodThreads; joinThread++ ) {
printf( "Waiting for thread %d to terminate...\n", joinThread+1 );
PR_JoinThread( thread[ joinThread ] );
}
}
} // this scopes the nsCOMPtrs
// no nsCOMPtrs are allowed to be alive when you call NS_ShutdownXPCOM
// Shut down XPCOM.
printf( "Shutting down XPCOM...\n" );
NS_ShutdownXPCOM( 0 );
printf( "...XPCOM shutdown complete\n" );
// Exit.
printf( "...test complete, rv=0x%08X\n", (int)rv );
return rv;
}