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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /gfx/layers/TransactionIdAllocator.h
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'gfx/layers/TransactionIdAllocator.h')
-rw-r--r--gfx/layers/TransactionIdAllocator.h66
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diff --git a/gfx/layers/TransactionIdAllocator.h b/gfx/layers/TransactionIdAllocator.h
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * 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 GFX_TRANSACTION_ID_ALLOCATOR_H
+#define GFX_TRANSACTION_ID_ALLOCATOR_H
+
+#include "nsISupportsImpl.h"
+#include "mozilla/TimeStamp.h"
+
+namespace mozilla {
+namespace layers {
+
+class TransactionIdAllocator {
+protected:
+ virtual ~TransactionIdAllocator() {}
+
+public:
+ NS_INLINE_DECL_REFCOUNTING(TransactionIdAllocator)
+
+ /**
+ * Allocate a unique id number for the current refresh tick, can
+ * only be called while IsInRefresh().
+ *
+ * If too many id's are allocated without being returned then
+ * the refresh driver will suspend until they catch up.
+ */
+ virtual uint64_t GetTransactionId() = 0;
+
+ /**
+ * Return the transaction id that for the last non-revoked transaction.
+ * This allows the caller to tell whether a composite was triggered by
+ * a paint that occurred after a call to TransactionId().
+ */
+ virtual uint64_t LastTransactionId() const = 0;
+
+ /**
+ * Notify that all work (including asynchronous composites)
+ * for a given transaction id has been completed.
+ *
+ * If the refresh driver has been suspended because
+ * of having too many outstanding id's, then this may
+ * resume it.
+ */
+ virtual void NotifyTransactionCompleted(uint64_t aTransactionId) = 0;
+
+ /**
+ * Revoke a transaction id that isn't needed to track
+ * completion of asynchronous work. This is similar
+ * to NotifyTransactionCompleted except avoids
+ * return ordering issues.
+ */
+ virtual void RevokeTransactionId(uint64_t aTransactionId) = 0;
+
+ /**
+ * Get the start time of the current refresh tick.
+ */
+ virtual mozilla::TimeStamp GetTransactionStart() = 0;
+};
+
+} // namespace layers
+} // namespace mozilla
+
+
+#endif /* GFX_TRANSACTION_ID_ALLOCATOR_H */