gecko-dev/parser/html/nsHtml5OwningUTF16Buffer.h
Nika Layzell b4b30f1acd Bug 1842658 - Part 2: Use refcounting macros for nsHtml5OwningUTF16Buffer, r=mccr8
When the code was originally added in bug 1842658, it was to use non-atomic
refcounting across multiple threads due to some invariants preventing
concurrent access. That was changed in bug 1607762 to fix a race issue.

We should be able to switch to using the macros now, which will simplify the
code here a bit.

Depends on D183203

Differential Revision: https://phabricator.services.mozilla.com/D183204
2023-07-14 16:20:54 +00:00

65 lines
1.5 KiB
C++

/* 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 nsHtml5OwningUTF16Buffer_h
#define nsHtml5OwningUTF16Buffer_h
#include "nsHtml5UTF16Buffer.h"
#include "mozilla/Span.h"
class nsHtml5OwningUTF16Buffer : public nsHtml5UTF16Buffer {
public:
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(nsHtml5OwningUTF16Buffer)
private:
/**
* Passes a buffer and its length to the superclass constructor.
*/
explicit nsHtml5OwningUTF16Buffer(char16_t* aBuffer);
public:
/**
* Constructor for a parser key placeholder. (No actual buffer.)
* @param aKey a parser key
*/
explicit nsHtml5OwningUTF16Buffer(void* aKey);
protected:
/**
* Takes care of releasing the owned buffer.
*/
~nsHtml5OwningUTF16Buffer();
public:
/**
* The next buffer in a queue.
*/
RefPtr<nsHtml5OwningUTF16Buffer> next;
/**
* A parser key.
*/
void* key;
static already_AddRefed<nsHtml5OwningUTF16Buffer> FalliblyCreate(
int32_t aLength);
/**
* Swap start, end and buffer fields with another object.
*/
void Swap(nsHtml5OwningUTF16Buffer* aOther);
/**
* Return a span from `end` to `aBufferSize`.
*/
mozilla::Span<char16_t> TailAsSpan(int32_t aBufferSize);
/**
* Add the argument to `end`.
*/
void AdvanceEnd(int32_t aNumberOfCodeUnits);
};
#endif // nsHtml5OwningUTF16Buffer_h