LCOV - code coverage report
Current view: directory - netwerk/base/src - nsBaseContentStream.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 58 47 81.0 %
Date: 2012-06-02 Functions: 11 10 90.9 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2                 : /* ***** BEGIN LICENSE BLOCK *****
       3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       4                 :  *
       5                 :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :  * the License. You may obtain a copy of the License at
       8                 :  * http://www.mozilla.org/MPL/
       9                 :  *
      10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :  * for the specific language governing rights and limitations under the
      13                 :  * License.
      14                 :  *
      15                 :  * The Original Code is mozilla.org code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is Google Inc.
      18                 :  * Portions created by the Initial Developer are Copyright (C) 2005
      19                 :  * the Initial Developer. All Rights Reserved.
      20                 :  *
      21                 :  * Contributor(s):
      22                 :  *  Darin Fisher <darin@meer.net>
      23                 :  *
      24                 :  * Alternatively, the contents of this file may be used under the terms of
      25                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      26                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      27                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      28                 :  * of those above. If you wish to allow use of your version of this file only
      29                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      30                 :  * use your version of this file under the terms of the MPL, indicate your
      31                 :  * decision by deleting the provisions above and replace them with the notice
      32                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      33                 :  * the provisions above, a recipient may use your version of this file under
      34                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      35                 :  *
      36                 :  * ***** END LICENSE BLOCK ***** */
      37                 : 
      38                 : #include "nsBaseContentStream.h"
      39                 : #include "nsStreamUtils.h"
      40                 : 
      41                 : //-----------------------------------------------------------------------------
      42                 : 
      43                 : void
      44              37 : nsBaseContentStream::DispatchCallback(bool async)
      45                 : {
      46              37 :   if (!mCallback)
      47              17 :     return;
      48                 : 
      49                 :   // It's important to clear mCallback and mCallbackTarget up-front because the
      50                 :   // OnInputStreamReady implementation may call our AsyncWait method.
      51                 : 
      52              40 :   nsCOMPtr<nsIInputStreamCallback> callback;
      53              20 :   if (async) {
      54               1 :     NS_NewInputStreamReadyEvent(getter_AddRefs(callback), mCallback,
      55               1 :                                 mCallbackTarget);
      56               1 :     if (!callback)
      57                 :       return;  // out of memory!
      58               1 :     mCallback = nsnull;
      59                 :   } else {
      60              19 :     callback.swap(mCallback);
      61                 :   }
      62              20 :   mCallbackTarget = nsnull;
      63                 : 
      64              20 :   callback->OnInputStreamReady(this);
      65                 : }
      66                 : 
      67                 : //-----------------------------------------------------------------------------
      68                 : // nsBaseContentStream::nsISupports
      69                 : 
      70             149 : NS_IMPL_THREADSAFE_ADDREF(nsBaseContentStream)
      71             149 : NS_IMPL_THREADSAFE_RELEASE(nsBaseContentStream)
      72                 : 
      73                 : // We only support nsIAsyncInputStream when we are in non-blocking mode.
      74              73 : NS_INTERFACE_MAP_BEGIN(nsBaseContentStream)
      75              73 :   NS_INTERFACE_MAP_ENTRY(nsIInputStream)
      76              36 :   NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIAsyncInputStream, mNonBlocking)
      77              17 :   NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIInputStream)
      78              17 : NS_INTERFACE_MAP_END_THREADSAFE
      79                 : 
      80                 : //-----------------------------------------------------------------------------
      81                 : // nsBaseContentStream::nsIInputStream
      82                 : 
      83                 : NS_IMETHODIMP
      84              18 : nsBaseContentStream::Close()
      85                 : {
      86              18 :   return IsClosed() ? NS_OK : CloseWithStatus(NS_BASE_STREAM_CLOSED);
      87                 : }
      88                 : 
      89                 : NS_IMETHODIMP
      90               2 : nsBaseContentStream::Available(PRUint32 *result)
      91                 : {
      92               2 :   *result = 0;
      93               2 :   return mStatus;
      94                 : }
      95                 : 
      96                 : NS_IMETHODIMP
      97              17 : nsBaseContentStream::Read(char *buf, PRUint32 count, PRUint32 *result)
      98                 : {
      99              17 :   return ReadSegments(NS_CopySegmentToBuffer, buf, count, result); 
     100                 : }
     101                 : 
     102                 : NS_IMETHODIMP
     103               0 : nsBaseContentStream::ReadSegments(nsWriteSegmentFun fun, void *closure,
     104                 :                                   PRUint32 count, PRUint32 *result)
     105                 : {
     106               0 :   *result = 0;
     107                 : 
     108               0 :   if (mStatus == NS_BASE_STREAM_CLOSED)
     109               0 :     return NS_OK;
     110                 : 
     111                 :   // No data yet
     112               0 :   if (!IsClosed() && IsNonBlocking())
     113               0 :     return NS_BASE_STREAM_WOULD_BLOCK;
     114                 : 
     115               0 :   return mStatus;
     116                 : }
     117                 : 
     118                 : NS_IMETHODIMP
     119              18 : nsBaseContentStream::IsNonBlocking(bool *result)
     120                 : {
     121              18 :   *result = mNonBlocking;
     122              18 :   return NS_OK;
     123                 : }
     124                 : 
     125                 : //-----------------------------------------------------------------------------
     126                 : // nsBaseContentStream::nsIAsyncInputStream
     127                 : 
     128                 : NS_IMETHODIMP
     129              18 : nsBaseContentStream::CloseWithStatus(nsresult status)
     130                 : {
     131              18 :   if (IsClosed())
     132               0 :     return NS_OK;
     133                 : 
     134              18 :   NS_ENSURE_ARG(NS_FAILED(status));
     135              18 :   mStatus = status;
     136                 : 
     137              18 :   DispatchCallback();
     138              18 :   return NS_OK;
     139                 : }
     140                 : 
     141                 : NS_IMETHODIMP
     142              20 : nsBaseContentStream::AsyncWait(nsIInputStreamCallback *callback,
     143                 :                                PRUint32 flags, PRUint32 requestedCount,
     144                 :                                nsIEventTarget *target)
     145                 : {
     146                 :   // Our _only_ consumer is nsInputStreamPump, so we simplify things here by
     147                 :   // making assumptions about how we will be called.
     148              20 :   NS_ASSERTION(target, "unexpected parameter");
     149              20 :   NS_ASSERTION(flags == 0, "unexpected parameter");
     150              20 :   NS_ASSERTION(requestedCount == 0, "unexpected parameter");
     151                 : 
     152                 : #ifdef DEBUG
     153                 :   bool correctThread;
     154              20 :   target->IsOnCurrentThread(&correctThread);
     155              20 :   NS_ASSERTION(correctThread, "event target must be on the current thread");
     156                 : #endif
     157                 : 
     158              20 :   mCallback = callback;
     159              20 :   mCallbackTarget = target;
     160                 : 
     161              20 :   if (!mCallback)
     162               0 :     return NS_OK;
     163                 : 
     164                 :   // If we're already closed, then dispatch this callback immediately.
     165              20 :   if (IsClosed()) {
     166               0 :     DispatchCallback();
     167               0 :     return NS_OK;
     168                 :   }
     169                 : 
     170              20 :   OnCallbackPending();
     171              20 :   return NS_OK;
     172                 : }

Generated by: LCOV version 1.7