summaryrefslogtreecommitdiffstats
path: root/dom/file/uri/BlobURLInputStream.h
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--dom/file/uri/BlobURLInputStream.h81
1 files changed, 81 insertions, 0 deletions
diff --git a/dom/file/uri/BlobURLInputStream.h b/dom/file/uri/BlobURLInputStream.h
new file mode 100644
index 0000000000..b9215e5ffd
--- /dev/null
+++ b/dom/file/uri/BlobURLInputStream.h
@@ -0,0 +1,81 @@
+/* -*- 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_dom_BlobURLInputStream_h
+#define mozilla_dom_BlobURLInputStream_h
+
+#include "mozilla/dom/BlobImpl.h"
+#include "mozilla/Mutex.h"
+#include "nsCOMPtr.h"
+#include "nsIAsyncInputStream.h"
+#include "nsIInputStreamLength.h"
+
+namespace mozilla::dom {
+
+class BlobURL;
+class BlobURLChannel;
+class BlobURLInputStream final : public nsIAsyncInputStream,
+ public nsIInputStreamLength,
+ public nsIAsyncInputStreamLength,
+ public nsIInputStreamCallback,
+ public nsIInputStreamLengthCallback {
+ public:
+ NS_DECL_THREADSAFE_ISUPPORTS
+ NS_DECL_NSIINPUTSTREAM
+ NS_DECL_NSIASYNCINPUTSTREAM
+ NS_DECL_NSIINPUTSTREAMLENGTH
+ NS_DECL_NSIASYNCINPUTSTREAMLENGTH
+ NS_DECL_NSIINPUTSTREAMCALLBACK
+ NS_DECL_NSIINPUTSTREAMLENGTHCALLBACK
+
+ static already_AddRefed<nsIInputStream> Create(BlobURLChannel* const aChannel,
+ BlobURL* const aBlobURL);
+
+ BlobURLInputStream(BlobURLChannel* const aChannel, nsACString& aBlobURLSpec);
+
+ private:
+ enum class State { INITIAL, READY, WAITING, CLOSED, ERROR };
+
+ ~BlobURLInputStream();
+
+ void WaitOnUnderlyingStream(const MutexAutoLock& aProofOfLock);
+
+ // This method should only be used to call RetrieveBlobData in a different
+ // thread
+ void CallRetrieveBlobData();
+
+ void RetrieveBlobData(const MutexAutoLock& aProofOfLock);
+
+ nsresult StoreBlobImplStream(already_AddRefed<BlobImpl> aBlobImpl,
+ const MutexAutoLock& aProofOfLock);
+ void NotifyWaitTargets(const MutexAutoLock& aProofOfLock);
+ void ReleaseUnderlyingStream(const MutexAutoLock& aProofOfLock);
+
+ RefPtr<BlobURLChannel> mChannel;
+ const nsCString mBlobURLSpec;
+
+ // Non-recursive mutex introduced in order to guard access to mState, mError
+ // and mAsyncInputStream
+ Mutex mStateMachineMutex MOZ_UNANNOTATED;
+ State mState;
+ // Stores the error code if stream is in error state
+ nsresult mError;
+
+ int64_t mBlobSize;
+
+ nsCOMPtr<nsIAsyncInputStream> mAsyncInputStream;
+ nsCOMPtr<nsIInputStreamCallback> mAsyncWaitCallback;
+ nsCOMPtr<nsIEventTarget> mAsyncWaitTarget;
+ uint32_t mAsyncWaitFlags;
+ uint32_t mAsyncWaitRequestedCount;
+
+ nsCOMPtr<nsIInputStreamLengthCallback> mAsyncLengthWaitCallback;
+ nsCOMPtr<nsIEventTarget> mAsyncLengthWaitTarget;
+};
+
+} // namespace mozilla::dom
+
+#endif /* mozilla_dom_BlobURLInputStream_h */