From 2aa4a82499d4becd2284cdb482213d541b8804dd Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 28 Apr 2024 16:29:10 +0200 Subject: Adding upstream version 86.0.1. Signed-off-by: Daniel Baumann --- dom/file/ipc/RemoteLazyInputStreamStorage.h | 69 +++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100644 dom/file/ipc/RemoteLazyInputStreamStorage.h (limited to 'dom/file/ipc/RemoteLazyInputStreamStorage.h') diff --git a/dom/file/ipc/RemoteLazyInputStreamStorage.h b/dom/file/ipc/RemoteLazyInputStreamStorage.h new file mode 100644 index 0000000000..c62f759a0a --- /dev/null +++ b/dom/file/ipc/RemoteLazyInputStreamStorage.h @@ -0,0 +1,69 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* 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/. */ + +#ifndef mozilla_RemoteLazyInputStreamStorage_h +#define mozilla_RemoteLazyInputStreamStorage_h + +#include "mozilla/RefPtr.h" +#include "nsClassHashtable.h" +#include "nsIObserver.h" + +class nsIInputStream; +struct nsID; + +namespace mozilla { + +class RemoteLazyInputStreamParentCallback; + +class RemoteLazyInputStreamStorage final : public nsIObserver { + public: + NS_DECL_THREADSAFE_ISUPPORTS + NS_DECL_NSIOBSERVER + + // This initializes the singleton and it must be called on the main-thread. + static void Initialize(); + + static Result, nsresult> Get(); + + void AddStream(nsIInputStream* aInputStream, const nsID& aID, uint64_t aSize, + uint64_t aChildID); + + // Removes and returns the stream corresponding to the nsID. May return a + // nullptr if there's no stream stored for the nsID. + nsCOMPtr ForgetStream(const nsID& aID); + + bool HasStream(const nsID& aID); + + void GetStream(const nsID& aID, uint64_t aStart, uint64_t aLength, + nsIInputStream** aInputStream); + + void StoreCallback(const nsID& aID, + RemoteLazyInputStreamParentCallback* aCallback); + + already_AddRefed TakeCallback( + const nsID& aID); + + private: + RemoteLazyInputStreamStorage() = default; + ~RemoteLazyInputStreamStorage() = default; + + struct StreamData { + nsCOMPtr mInputStream; + RefPtr mCallback; + + // This is the Process ID connected with this inputStream. We need to store + // this information in order to delete it if the child crashes/shutdowns. + uint64_t mChildID; + + uint64_t mSize; + }; + + nsClassHashtable mStorage; +}; + +} // namespace mozilla + +#endif // mozilla_RemoteLazyInputStreamStorage_h -- cgit v1.2.3