summaryrefslogtreecommitdiffstats
path: root/netwerk/base/SimpleBuffer.h
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--netwerk/base/SimpleBuffer.h57
1 files changed, 57 insertions, 0 deletions
diff --git a/netwerk/base/SimpleBuffer.h b/netwerk/base/SimpleBuffer.h
new file mode 100644
index 0000000000..031f59afe5
--- /dev/null
+++ b/netwerk/base/SimpleBuffer.h
@@ -0,0 +1,57 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* 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 SimpleBuffer_h__
+#define SimpleBuffer_h__
+
+/*
+ This class is similar to a nsPipe except it does not have any locking, stores
+ an unbounded amount of data, can only be used on one thread, and has much
+ simpler result code semantics to deal with.
+*/
+
+#include "prtypes.h"
+#include "ErrorList.h"
+#include "mozilla/LinkedList.h"
+#include "nsISupportsImpl.h"
+
+namespace mozilla {
+namespace net {
+
+class SimpleBufferPage : public LinkedListElement<SimpleBufferPage> {
+ public:
+ SimpleBufferPage() = default;
+ static const size_t kSimpleBufferPageSize = 32000;
+
+ private:
+ friend class SimpleBuffer;
+ char mBuffer[kSimpleBufferPageSize]{0};
+ size_t mReadOffset{0};
+ size_t mWriteOffset{0};
+};
+
+class SimpleBuffer {
+ public:
+ SimpleBuffer() = default;
+ ~SimpleBuffer() = default;
+
+ nsresult Write(char* src, size_t len); // return OK or OUT_OF_MEMORY
+ size_t Read(char* dest, size_t maxLen); // return bytes read
+ size_t Available();
+ void Clear();
+
+ private:
+ NS_DECL_OWNINGTHREAD
+
+ nsresult mStatus{NS_OK};
+ AutoCleanLinkedList<SimpleBufferPage> mBufferList;
+ size_t mAvailable{0};
+};
+
+} // namespace net
+} // namespace mozilla
+
+#endif