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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
commit36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree105e8c98ddea1c1e4784a60a5a6410fa416be2de /xpcom/io/InputStreamLengthHelper.h
parentInitial commit. (diff)
downloadfirefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz
firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'xpcom/io/InputStreamLengthHelper.h')
-rw-r--r--xpcom/io/InputStreamLengthHelper.h57
1 files changed, 57 insertions, 0 deletions
diff --git a/xpcom/io/InputStreamLengthHelper.h b/xpcom/io/InputStreamLengthHelper.h
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+/* -*- 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_InputStreamLengthHelper_h
+#define mozilla_InputStreamLengthHelper_h
+
+#include <functional>
+
+#include "nsISupportsImpl.h"
+#include "nsIInputStreamLength.h"
+#include "nsThreadUtils.h"
+
+class nsIInputStream;
+
+namespace mozilla {
+
+// This class helps to retrieve the stream's length.
+
+class InputStreamLengthHelper final : public Runnable,
+ public nsIInputStreamLengthCallback {
+ public:
+ NS_DECL_ISUPPORTS_INHERITED
+
+ // This is one of the 2 entry points of this class. It returns false if the
+ // length cannot be taken synchronously.
+ static bool GetSyncLength(nsIInputStream* aStream, int64_t* aLength);
+
+ // This is one of the 2 entry points of this class. The callback is executed
+ // asynchronously when the length is known.
+ static void GetAsyncLength(
+ nsIInputStream* aStream,
+ const std::function<void(int64_t aLength)>& aCallback);
+
+ private:
+ NS_DECL_NSIINPUTSTREAMLENGTHCALLBACK
+
+ InputStreamLengthHelper(
+ nsIInputStream* aStream,
+ const std::function<void(int64_t aLength)>& aCallback);
+
+ ~InputStreamLengthHelper();
+
+ NS_IMETHOD
+ Run() override;
+
+ void ExecCallback(int64_t aLength);
+
+ nsCOMPtr<nsIInputStream> mStream;
+ std::function<void(int64_t aLength)> mCallback;
+};
+
+} // namespace mozilla
+
+#endif // mozilla_InputStreamLengthHelper_h