The Tor Browser: ipc/glue/FileDescriptorUtils.cpp@6474c204b198

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

     1 /* This Source Code Form is subject to the terms of the Mozilla Public

     2  * License, v. 2.0. If a copy of the MPL was not distributed with this

     3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     5 #include "FileDescriptorUtils.h"

     7 #include "nsIEventTarget.h"

     9 #include "nsCOMPtr.h"

    10 #include "nsDebug.h"

    11 #include "nsNetCID.h"

    12 #include "nsServiceManagerUtils.h"

    13 #include "nsThreadUtils.h"

    14 #include "prio.h"

    15 #include "private/pprio.h"

    17 using mozilla::ipc::CloseFileRunnable;

    19 #ifdef DEBUG

    21 CloseFileRunnable::CloseFileRunnable(const FileDescriptor& aFileDescriptor)

    22 : mFileDescriptor(aFileDescriptor)

    23 {

    24   MOZ_ASSERT(aFileDescriptor.IsValid());

    25 }

    27 #endif // DEBUG

    29 CloseFileRunnable::~CloseFileRunnable()

    30 {

    31   if (mFileDescriptor.IsValid()) {

    32     // It's probably safer to take the main thread IO hit here rather than leak

    33     // the file descriptor.

    34     CloseFile();

    35   }

    36 }

    38 NS_IMPL_ISUPPORTS(CloseFileRunnable, nsIRunnable)

    40 void

    41 CloseFileRunnable::Dispatch()

    42 {

    43   nsCOMPtr<nsIEventTarget> eventTarget =

    44     do_GetService(NS_STREAMTRANSPORTSERVICE_CONTRACTID);

    45   NS_ENSURE_TRUE_VOID(eventTarget);

    47   nsresult rv = eventTarget->Dispatch(this, NS_DISPATCH_NORMAL);

    48   NS_ENSURE_SUCCESS_VOID(rv);

    49 }

    51 void

    52 CloseFileRunnable::CloseFile()

    53 {

    54   // It's possible for this to happen on the main thread if the dispatch to the

    55   // stream service fails so we can't assert the thread on which we're running.

    57   MOZ_ASSERT(mFileDescriptor.IsValid());

    59   PRFileDesc* fd =

    60     PR_ImportFile(PROsfd(mFileDescriptor.PlatformHandle()));

    61   NS_WARN_IF_FALSE(fd, "Failed to import file handle!");

    63   mFileDescriptor = FileDescriptor();

    65   if (fd) {

    66     PR_Close(fd);

    67     fd = nullptr;

    68   }

    69 }

    71 NS_IMETHODIMP

    72 CloseFileRunnable::Run()

    73 {

    74   MOZ_ASSERT(!NS_IsMainThread());

    76   CloseFile();

    77   return NS_OK;

    78 }

The Tor Browser / file revision