The Tor Browser: netwerk/cache/nsDiskCacheStreams.cpp@6474c204b198 (annotated)

netwerk/cache/nsDiskCacheStreams.cpp@6474c204b198 (annotated)

netwerk/cache/nsDiskCacheStreams.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
  *
  * 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 "nsCache.h"
 #include "nsDiskCache.h"
 #include "nsDiskCacheDevice.h"
 #include "nsDiskCacheStreams.h"
 #include "nsCacheService.h"
 #include "mozilla/FileUtils.h"
 #include "nsThreadUtils.h"
 #include "mozilla/MemoryReporting.h"
 #include "mozilla/Telemetry.h"
 #include "mozilla/TimeStamp.h"
 #include <algorithm>
 #include "mozilla/VisualEventTracer.h"
 // we pick 16k as the max buffer size because that is the threshold above which
 //      we are unable to store the data in the cache block files
 //      see nsDiskCacheMap.[cpp,h]
 #define kMaxBufferSize      (16 * 1024)
 // Assumptions:
 //      - cache descriptors live for life of streams
 //      - streams will only be used by FileTransport,
 //         they will not be directly accessible to clients
 //      - overlapped I/O is NOT supported
 /******************************************************************************
  *  nsDiskCacheInputStream
  *****************************************************************************/
 class nsDiskCacheInputStream : public nsIInputStream {
 public:
     nsDiskCacheInputStream( nsDiskCacheStreamIO * parent,
                             PRFileDesc *          fileDesc,
                             const char *          buffer,
                             uint32_t              endOfStream);
     virtual ~nsDiskCacheInputStream();
     NS_DECL_THREADSAFE_ISUPPORTS
     NS_DECL_NSIINPUTSTREAM
 private:
     nsDiskCacheStreamIO *           mStreamIO;  // backpointer to parent
     PRFileDesc *                    mFD;
     const char *                    mBuffer;
     uint32_t                        mStreamEnd;
     uint32_t                        mPos;       // stream position
     bool                            mClosed;
 };
 NS_IMPL_ISUPPORTS(nsDiskCacheInputStream, nsIInputStream)
 nsDiskCacheInputStream::nsDiskCacheInputStream( nsDiskCacheStreamIO * parent,
                                                 PRFileDesc *          fileDesc,
                                                 const char *          buffer,
                                                 uint32_t              endOfStream)
     : mStreamIO(parent)
     , mFD(fileDesc)
     , mBuffer(buffer)
     , mStreamEnd(endOfStream)
     , mPos(0)
     , mClosed(false)
 {
     NS_ADDREF(mStreamIO);
     mStreamIO->IncrementInputStreamCount();
 }
 nsDiskCacheInputStream::~nsDiskCacheInputStream()
 {
     Close();
     mStreamIO->DecrementInputStreamCount();
     NS_RELEASE(mStreamIO);
 }
 NS_IMETHODIMP
 nsDiskCacheInputStream::Close()
 {
     if (!mClosed) {
         if (mFD) {
             (void) PR_Close(mFD);
             mFD = nullptr;
         }
         mClosed = true;
     }
     return NS_OK;
 }
 NS_IMETHODIMP
 nsDiskCacheInputStream::Available(uint64_t * bytesAvailable)
 {
     if (mClosed)  return NS_BASE_STREAM_CLOSED;
     if (mStreamEnd < mPos)  return NS_ERROR_UNEXPECTED;
     *bytesAvailable = mStreamEnd - mPos;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsDiskCacheInputStream::Read(char * buffer, uint32_t count, uint32_t * bytesRead)
 {
     *bytesRead = 0;
     if (mClosed) {
         CACHE_LOG_DEBUG(("CACHE: nsDiskCacheInputStream::Read "
                          "[stream=%p] stream was closed",
                          this, buffer, count));
         return NS_OK;
     }
     if (mPos == mStreamEnd) {
         CACHE_LOG_DEBUG(("CACHE: nsDiskCacheInputStream::Read "
                          "[stream=%p] stream at end of file",
                          this, buffer, count));
         return NS_OK;
     }
     if (mPos > mStreamEnd) {
         CACHE_LOG_DEBUG(("CACHE: nsDiskCacheInputStream::Read "
                          "[stream=%p] stream past end of file (!)",
                          this, buffer, count));
         return NS_ERROR_UNEXPECTED;
     }
     if (count > mStreamEnd - mPos)
         count = mStreamEnd - mPos;
     if (mFD) {
         // just read from file
         int32_t  result = PR_Read(mFD, buffer, count);
         if (result < 0) {
             nsresult rv = NS_ErrorAccordingToNSPR();
             CACHE_LOG_DEBUG(("CACHE: nsDiskCacheInputStream::Read PR_Read failed"
                              "[stream=%p, rv=%d, NSPR error %s",
                              this, int(rv), PR_ErrorToName(PR_GetError())));
             return rv;
         }
         mPos += (uint32_t)result;
         *bytesRead = (uint32_t)result;
     } else if (mBuffer) {
         // read data from mBuffer
         memcpy(buffer, mBuffer + mPos, count);
         mPos += count;
         *bytesRead = count;
     } else {
         // no data source for input stream
     }
     CACHE_LOG_DEBUG(("CACHE: nsDiskCacheInputStream::Read "
                      "[stream=%p, count=%ud, byteRead=%ud] ",
                      this, unsigned(count), unsigned(*bytesRead)));
     return NS_OK;
 }
 NS_IMETHODIMP
 nsDiskCacheInputStream::ReadSegments(nsWriteSegmentFun writer,
                                      void *            closure,
                                      uint32_t          count,
                                      uint32_t *        bytesRead)
 {
     return NS_ERROR_NOT_IMPLEMENTED;
 }
 NS_IMETHODIMP
 nsDiskCacheInputStream::IsNonBlocking(bool * nonBlocking)
 {
     *nonBlocking = false;
     return NS_OK;
 }
 /******************************************************************************
  *  nsDiskCacheStreamIO
  *****************************************************************************/
 NS_IMPL_ISUPPORTS(nsDiskCacheStreamIO, nsIOutputStream)
 nsDiskCacheStreamIO::nsDiskCacheStreamIO(nsDiskCacheBinding *   binding)
     : mBinding(binding)
     , mInStreamCount(0)
     , mFD(nullptr)
     , mStreamEnd(0)
     , mBufSize(0)
     , mBuffer(nullptr)
     , mOutputStreamIsOpen(false)
 {
     mDevice = (nsDiskCacheDevice *)mBinding->mCacheEntry->CacheDevice();
     // acquire "death grip" on cache service
     nsCacheService *service = nsCacheService::GlobalInstance();
     NS_ADDREF(service);
 }
 nsDiskCacheStreamIO::~nsDiskCacheStreamIO()
 {
     nsCacheService::AssertOwnsLock();
     // Close the outputstream
     if (mBinding && mOutputStreamIsOpen) {
         (void)CloseOutputStream();
     }
     // release "death grip" on cache service
     nsCacheService *service = nsCacheService::GlobalInstance();
     NS_RELEASE(service);
     // assert streams closed
     NS_ASSERTION(!mOutputStreamIsOpen, "output stream still open");
     NS_ASSERTION(mInStreamCount == 0, "input stream still open");
     NS_ASSERTION(!mFD, "file descriptor not closed");
     DeleteBuffer();
 }
 // NOTE: called with service lock held
 nsresult
 nsDiskCacheStreamIO::GetInputStream(uint32_t offset, nsIInputStream ** inputStream)
 {
     NS_ENSURE_ARG_POINTER(inputStream);
     NS_ENSURE_TRUE(offset == 0, NS_ERROR_NOT_IMPLEMENTED);
     *inputStream = nullptr;
     if (!mBinding)  return NS_ERROR_NOT_AVAILABLE;
     if (mOutputStreamIsOpen) {
         NS_WARNING("already have an output stream open");
         return NS_ERROR_NOT_AVAILABLE;
     }
     nsresult            rv;
     PRFileDesc *        fd = nullptr;
     mStreamEnd = mBinding->mCacheEntry->DataSize();
     if (mStreamEnd == 0) {
         // there's no data to read
         NS_ASSERTION(!mBinding->mRecord.DataLocationInitialized(), "storage allocated for zero data size");
     } else if (mBinding->mRecord.DataFile() == 0) {
         // open file desc for data
         rv = OpenCacheFile(PR_RDONLY, &fd);
         if (NS_FAILED(rv))  return rv;  // unable to open file
         NS_ASSERTION(fd, "cache stream lacking open file.");
     } else if (!mBuffer) {
         // read block file for data
         rv = ReadCacheBlocks(mStreamEnd);
         if (NS_FAILED(rv))  return rv;
     }
     // else, mBuffer already contains all of the data (left over from a
     // previous block-file read or write).
     NS_ASSERTION(!(fd && mBuffer), "ambiguous data sources for input stream");
     // create a new input stream
     nsDiskCacheInputStream * inStream = new nsDiskCacheInputStream(this, fd, mBuffer, mStreamEnd);
     if (!inStream)  return NS_ERROR_OUT_OF_MEMORY;
     NS_ADDREF(*inputStream = inStream);
     return NS_OK;
 }
 // NOTE: called with service lock held
 nsresult
 nsDiskCacheStreamIO::GetOutputStream(uint32_t offset, nsIOutputStream ** outputStream)
 {
     NS_ENSURE_ARG_POINTER(outputStream);
     *outputStream = nullptr;
     if (!mBinding)  return NS_ERROR_NOT_AVAILABLE;
     NS_ASSERTION(!mOutputStreamIsOpen, "already have an output stream open");
     NS_ASSERTION(mInStreamCount == 0, "we already have input streams open");
     if (mOutputStreamIsOpen || mInStreamCount)  return NS_ERROR_NOT_AVAILABLE;
     mStreamEnd = mBinding->mCacheEntry->DataSize();
     // Inits file or buffer and truncate at the desired offset
     nsresult rv = SeekAndTruncate(offset);
     if (NS_FAILED(rv)) return rv;
     mOutputStreamIsOpen = true;
     NS_ADDREF(*outputStream = this);
     return NS_OK;
 }
 nsresult
 nsDiskCacheStreamIO::ClearBinding()
 {
     nsresult rv = NS_OK;
     if (mBinding && mOutputStreamIsOpen)
         rv = CloseOutputStream();
     mBinding = nullptr;
     return rv;
 }
 NS_IMETHODIMP
 nsDiskCacheStreamIO::Close()
 {
     if (!mOutputStreamIsOpen) return NS_OK;
     mozilla::TimeStamp start = mozilla::TimeStamp::Now();
     // grab service lock
     nsCacheServiceAutoLock lock(LOCK_TELEM(NSDISKCACHESTREAMIO_CLOSEOUTPUTSTREAM));
     if (!mBinding) {    // if we're severed, just clear member variables
         mOutputStreamIsOpen = false;
         return NS_ERROR_NOT_AVAILABLE;
     }
     nsresult rv = CloseOutputStream();
     if (NS_FAILED(rv))
         NS_WARNING("CloseOutputStream() failed");
     mozilla::Telemetry::ID id;
     if (NS_IsMainThread())
         id = mozilla::Telemetry::NETWORK_DISK_CACHE_STREAMIO_CLOSE_MAIN_THREAD;
     else
         id = mozilla::Telemetry::NETWORK_DISK_CACHE_STREAMIO_CLOSE;
     mozilla::Telemetry::AccumulateTimeDelta(id, start);
     return rv;
 }
 nsresult
 nsDiskCacheStreamIO::CloseOutputStream()
 {
     NS_ASSERTION(mBinding, "oops");
     CACHE_LOG_DEBUG(("CACHE: CloseOutputStream [%x doomed=%u]\n",
         mBinding->mRecord.HashNumber(), mBinding->mDoomed));
     // Mark outputstream as closed, even if saving the stream fails
     mOutputStreamIsOpen = false;
     // When writing to a file, just close the file
     if (mFD) {
         (void) PR_Close(mFD);
         mFD = nullptr;
         return NS_OK;
     }
     // write data to cache blocks, or flush mBuffer to file
     NS_ASSERTION(mStreamEnd <= kMaxBufferSize, "stream is bigger than buffer");
     nsDiskCacheMap *cacheMap = mDevice->CacheMap();  // get map reference
     nsDiskCacheRecord * record = &mBinding->mRecord;
     nsresult rv = NS_OK;
     // delete existing storage
     if (record->DataLocationInitialized()) {
         rv = cacheMap->DeleteStorage(record, nsDiskCache::kData);
         NS_ENSURE_SUCCESS(rv, rv);
         // Only call UpdateRecord when there is no data to write,
         // because WriteDataCacheBlocks / FlushBufferToFile calls it.
         if ((mStreamEnd == 0) && (!mBinding->mDoomed)) {
             rv = cacheMap->UpdateRecord(record);
             if (NS_FAILED(rv)) {
                 NS_WARNING("cacheMap->UpdateRecord() failed.");
                 return rv;   // XXX doom cache entry
             }
         }
     }
     if (mStreamEnd == 0) return NS_OK;     // nothing to write
     // try to write to the cache blocks
     rv = cacheMap->WriteDataCacheBlocks(mBinding, mBuffer, mStreamEnd);
     if (NS_FAILED(rv)) {
         NS_WARNING("WriteDataCacheBlocks() failed.");
         // failed to store in cacheblocks, save as separate file
         rv = FlushBufferToFile(); // initializes DataFileLocation() if necessary
         if (mFD) {
             UpdateFileSize();
             (void) PR_Close(mFD);
             mFD = nullptr;
         }
         else
             NS_WARNING("no file descriptor");
     }
     return rv;
 }
 // assumptions:
 //      only one thread writing at a time
 //      never have both output and input streams open
 //      OnDataSizeChanged() will have already been called to update entry->DataSize()
 NS_IMETHODIMP
 nsDiskCacheStreamIO::Write( const char * buffer,
                             uint32_t     count,
                             uint32_t *   bytesWritten)
 {
     NS_ENSURE_ARG_POINTER(buffer);
     NS_ENSURE_ARG_POINTER(bytesWritten);
     if (!mOutputStreamIsOpen) return NS_BASE_STREAM_CLOSED;
     *bytesWritten = 0;  // always initialize to zero in case of errors
     NS_ASSERTION(count, "Write called with count of zero");
     if (count == 0) {
         return NS_OK;   // nothing to write
     }
     // grab service lock
     nsCacheServiceAutoLock lock(LOCK_TELEM(NSDISKCACHESTREAMIO_WRITE));
     if (!mBinding)  return NS_ERROR_NOT_AVAILABLE;
     if (mInStreamCount) {
         // we have open input streams already
         // this is an error until we support overlapped I/O
         NS_WARNING("Attempting to write to cache entry with open input streams.\n");
         return NS_ERROR_NOT_AVAILABLE;
     }
     // Not writing to file, and it will fit in the cachedatablocks?
     if (!mFD && (mStreamEnd + count <= kMaxBufferSize)) {
         // We have more data than the current buffer size?
         if ((mStreamEnd + count > mBufSize) && (mBufSize < kMaxBufferSize)) {
             // Increase buffer to the maximum size.
             mBuffer = (char *) moz_xrealloc(mBuffer, kMaxBufferSize);
             mBufSize = kMaxBufferSize;
         }
         // Store in the buffer but only if it fits
         if (mStreamEnd + count <= mBufSize) {
             memcpy(mBuffer + mStreamEnd, buffer, count);
             mStreamEnd += count;
             *bytesWritten = count;
             return NS_OK;
         }
     }
     // There are more bytes than fit in the buffer/cacheblocks, switch to file
     if (!mFD) {
         // Opens a cache file and write the buffer to it
         nsresult rv = FlushBufferToFile();
         if (NS_FAILED(rv)) {
             return rv;
         }
     }
     // Write directly to the file
     if (PR_Write(mFD, buffer, count) != (int32_t)count) {
         NS_WARNING("failed to write all data");
         return NS_ERROR_UNEXPECTED;     // NS_ErrorAccordingToNSPR()
     }
     mStreamEnd += count;
     *bytesWritten = count;
     UpdateFileSize();
     NS_ASSERTION(mBinding->mCacheEntry->DataSize() == mStreamEnd, "bad stream");
     return NS_OK;
 }
 void
 nsDiskCacheStreamIO::UpdateFileSize()
 {
     NS_ASSERTION(mFD, "nsDiskCacheStreamIO::UpdateFileSize should not have been called");
     nsDiskCacheRecord * record = &mBinding->mRecord;
     const uint32_t      oldSizeK  = record->DataFileSize();
     uint32_t            newSizeK  = (mStreamEnd + 0x03FF) >> 10;
     // make sure the size won't overflow (bug #651100)
     if (newSizeK > kMaxDataSizeK)
         newSizeK = kMaxDataSizeK;
     if (newSizeK == oldSizeK)  return;
     record->SetDataFileSize(newSizeK);
     // update cache size totals
     nsDiskCacheMap * cacheMap = mDevice->CacheMap();
     cacheMap->DecrementTotalSize(oldSizeK);       // decrement old size
     cacheMap->IncrementTotalSize(newSizeK);       // increment new size
     if (!mBinding->mDoomed) {
         nsresult rv = cacheMap->UpdateRecord(record);
         if (NS_FAILED(rv)) {
             NS_WARNING("cacheMap->UpdateRecord() failed.");
             // XXX doom cache entry?
         }
     }
 }
 nsresult
 nsDiskCacheStreamIO::OpenCacheFile(int flags, PRFileDesc ** fd)
 {
     NS_ENSURE_ARG_POINTER(fd);
     CACHE_LOG_DEBUG(("nsDiskCacheStreamIO::OpenCacheFile"));
     nsresult         rv;
     nsDiskCacheMap * cacheMap = mDevice->CacheMap();
     nsCOMPtr<nsIFile>           localFile;
     rv = cacheMap->GetLocalFileForDiskCacheRecord(&mBinding->mRecord,
                                                   nsDiskCache::kData,
                                                   !!(flags & PR_CREATE_FILE),
                                                   getter_AddRefs(localFile));
     if (NS_FAILED(rv))  return rv;
     // create PRFileDesc for input stream - the 00600 is just for consistency
     return localFile->OpenNSPRFileDesc(flags, 00600, fd);
 }
 nsresult
 nsDiskCacheStreamIO::ReadCacheBlocks(uint32_t bufferSize)
 {
     mozilla::eventtracer::AutoEventTracer readCacheBlocks(
         mBinding->mCacheEntry,
         mozilla::eventtracer::eExec,
         mozilla::eventtracer::eDone,
         "net::cache::ReadCacheBlocks");
     NS_ASSERTION(mStreamEnd == mBinding->mCacheEntry->DataSize(), "bad stream");
     NS_ASSERTION(bufferSize <= kMaxBufferSize, "bufferSize too large for buffer");
     NS_ASSERTION(mStreamEnd <= bufferSize, "data too large for buffer");
     nsDiskCacheRecord * record = &mBinding->mRecord;
     if (!record->DataLocationInitialized()) return NS_OK;
     NS_ASSERTION(record->DataFile() != kSeparateFile, "attempt to read cache blocks on separate file");
     if (!mBuffer) {
         mBuffer = (char *) moz_xmalloc(bufferSize);
         mBufSize = bufferSize;
     }
     // read data stored in cache block files
     nsDiskCacheMap *map = mDevice->CacheMap();  // get map reference
     return map->ReadDataCacheBlocks(mBinding, mBuffer, mStreamEnd);
 }
 nsresult
 nsDiskCacheStreamIO::FlushBufferToFile()
 {
     mozilla::eventtracer::AutoEventTracer flushBufferToFile(
         mBinding->mCacheEntry,
         mozilla::eventtracer::eExec,
         mozilla::eventtracer::eDone,
         "net::cache::FlushBufferToFile");
     nsresult  rv;
     nsDiskCacheRecord * record = &mBinding->mRecord;
     if (!mFD) {
         if (record->DataLocationInitialized() && (record->DataFile() > 0)) {
             // remove cache block storage
             nsDiskCacheMap * cacheMap = mDevice->CacheMap();
             rv = cacheMap->DeleteStorage(record, nsDiskCache::kData);
             if (NS_FAILED(rv))  return rv;
         }
         record->SetDataFileGeneration(mBinding->mGeneration);
         // allocate file
         rv = OpenCacheFile(PR_RDWR | PR_CREATE_FILE, &mFD);
         if (NS_FAILED(rv))  return rv;
         int64_t dataSize = mBinding->mCacheEntry->PredictedDataSize();
         if (dataSize != -1)
             mozilla::fallocate(mFD, std::min<int64_t>(dataSize, kPreallocateLimit));
     }
     // write buffer to the file when there is data in it
     if (mStreamEnd > 0) {
         if (!mBuffer) {
             NS_RUNTIMEABORT("Fix me!");
         }
         if (PR_Write(mFD, mBuffer, mStreamEnd) != (int32_t)mStreamEnd) {
             NS_WARNING("failed to flush all data");
             return NS_ERROR_UNEXPECTED;     // NS_ErrorAccordingToNSPR()
         }
     }
     // buffer is no longer valid
     DeleteBuffer();
     return NS_OK;
 }
 void
 nsDiskCacheStreamIO::DeleteBuffer()
 {
     if (mBuffer) {
         free(mBuffer);
         mBuffer = nullptr;
         mBufSize = 0;
     }
 }
 size_t
 nsDiskCacheStreamIO::SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf)
 {
     size_t usage = aMallocSizeOf(this);
     usage += aMallocSizeOf(mFD);
     usage += aMallocSizeOf(mBuffer);
     return usage;
 }
 nsresult
 nsDiskCacheStreamIO::SeekAndTruncate(uint32_t offset)
 {
     if (!mBinding)  return NS_ERROR_NOT_AVAILABLE;
     if (uint32_t(offset) > mStreamEnd)  return NS_ERROR_FAILURE;
     // Set the current end to the desired offset
     mStreamEnd = offset;
     // Currently stored in file?
     if (mBinding->mRecord.DataLocationInitialized() &&
         (mBinding->mRecord.DataFile() == 0)) {
         if (!mFD) {
             // we need an mFD, we better open it now
             nsresult rv = OpenCacheFile(PR_RDWR | PR_CREATE_FILE, &mFD);
             if (NS_FAILED(rv))  return rv;
         }
         if (offset) {
             if (PR_Seek(mFD, offset, PR_SEEK_SET) == -1)
                 return NS_ErrorAccordingToNSPR();
         }
         nsDiskCache::Truncate(mFD, offset);
         UpdateFileSize();
         // When we starting at zero again, close file and start with buffer.
         // If offset is non-zero (and within buffer) an option would be
         // to read the file into the buffer, but chance is high that it is
         // rewritten to the file anyway.
         if (offset == 0) {
             // close file descriptor
             (void) PR_Close(mFD);
             mFD = nullptr;
         }
         return NS_OK;
     }
     // read data into mBuffer if not read yet.
     if (offset && !mBuffer) {
         nsresult rv = ReadCacheBlocks(kMaxBufferSize);
         if (NS_FAILED(rv))  return rv;
     }
     // stream buffer sanity check
     NS_ASSERTION(mStreamEnd <= kMaxBufferSize, "bad stream");
     return NS_OK;
 }
 NS_IMETHODIMP
 nsDiskCacheStreamIO::Flush()
 {
     if (!mOutputStreamIsOpen)  return NS_BASE_STREAM_CLOSED;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsDiskCacheStreamIO::WriteFrom(nsIInputStream *inStream, uint32_t count, uint32_t *bytesWritten)
 {
     NS_NOTREACHED("WriteFrom");
     return NS_ERROR_NOT_IMPLEMENTED;
 }
 NS_IMETHODIMP
 nsDiskCacheStreamIO::WriteSegments( nsReadSegmentFun reader,
                                         void *           closure,
                                         uint32_t         count,
                                         uint32_t *       bytesWritten)
 {
     NS_NOTREACHED("WriteSegments");
     return NS_ERROR_NOT_IMPLEMENTED;
 }
 NS_IMETHODIMP
 nsDiskCacheStreamIO::IsNonBlocking(bool * nonBlocking)
 {
     *nonBlocking = false;
     return NS_OK;
 }

The Tor Browser / annotate

netwerk/cache/nsDiskCacheStreams.cpp@6474c204b198 (annotated)

netwerk/cache/nsDiskCacheStreams.cpp