mirror of
https://github.com/mozilla/gecko-dev.git
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82 lines
1.8 KiB
C++
82 lines
1.8 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "FileDescriptorUtils.h"
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#include "nsIEventTarget.h"
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#include "nsCOMPtr.h"
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#include "nsDebug.h"
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#include "nsNetCID.h"
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#include "nsServiceManagerUtils.h"
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#include "nsThreadUtils.h"
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#include "prio.h"
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#include "private/pprio.h"
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using mozilla::ipc::CloseFileRunnable;
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#ifdef DEBUG
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CloseFileRunnable::CloseFileRunnable(const FileDescriptor& aFileDescriptor)
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: mFileDescriptor(aFileDescriptor)
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{
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MOZ_ASSERT(NS_IsMainThread());
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MOZ_ASSERT(aFileDescriptor.IsValid());
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}
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#endif // DEBUG
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CloseFileRunnable::~CloseFileRunnable()
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{
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if (mFileDescriptor.IsValid()) {
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// It's probably safer to take the main thread IO hit here rather than leak
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// the file descriptor.
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CloseFile();
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}
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}
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NS_IMPL_ISUPPORTS1(CloseFileRunnable, nsIRunnable)
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void
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CloseFileRunnable::Dispatch()
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{
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MOZ_ASSERT(NS_IsMainThread());
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nsCOMPtr<nsIEventTarget> eventTarget =
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do_GetService(NS_STREAMTRANSPORTSERVICE_CONTRACTID);
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NS_ENSURE_TRUE_VOID(eventTarget);
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nsresult rv = eventTarget->Dispatch(this, NS_DISPATCH_NORMAL);
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NS_ENSURE_SUCCESS_VOID(rv);
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}
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void
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CloseFileRunnable::CloseFile()
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{
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// It's possible for this to happen on the main thread if the dispatch to the
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// stream service fails so we can't assert the thread on which we're running.
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MOZ_ASSERT(mFileDescriptor.IsValid());
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PRFileDesc* fd =
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PR_ImportFile(PROsfd(mFileDescriptor.PlatformHandle()));
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NS_WARN_IF_FALSE(fd, "Failed to import file handle!");
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mFileDescriptor = FileDescriptor();
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if (fd) {
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PR_Close(fd);
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fd = nullptr;
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}
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}
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NS_IMETHODIMP
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CloseFileRunnable::Run()
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{
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MOZ_ASSERT(!NS_IsMainThread());
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CloseFile();
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return NS_OK;
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}
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