The Tor Browser: netwerk/test/TestThreadedIO.cpp@b8a032363ba2 (annotated)

netwerk/test/TestThreadedIO.cpp@b8a032363ba2 (annotated)

netwerk/test/TestThreadedIO.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* 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/. */
 #include <stdio.h>
 #include "nsCOMPtr.h"
 #include "nsIEventQueueService.h"
 #include "nsIServiceManager.h"
 #include "nsIStreamListener.h"
 #include "nsIURI.h"
 #include "nsNetUtil.h"
 #include <algorithm>
 //#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:
     bool mDone;
     int    mThreadNo;
     FILE  *mFile;
     static int threadCount;
 }; // class TestListener
 int TestListener::threadCount = 0;
 TestListener::TestListener()
     : mDone( 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_ISUPPORTS( 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 char16_t *aMsg ) {
     nsresult rv = NS_OK;
     printf( "TestListener::OnStopRequest called on thread %d\n", mThreadNo );
     fclose( mFile );
     mDone = true;
     return rv;
 }
 NS_IMETHODIMP
 TestListener::OnDataAvailable( nsIChannel *aChannel,
                                nsISupports *aContext,
                                nsIInputStream *aStream,
                                uint64_t offset,
                                uint32_t 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,
                             std::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(nullptr, nullptr, nullptr);
     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_GLOBAL_THREAD,
                                                       PR_JOINABLE_THREAD,
 );
                 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;
 }

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netwerk/test/TestThreadedIO.cpp@b8a032363ba2 (annotated)

netwerk/test/TestThreadedIO.cpp