gecko-dev/dom/media/SharedBuffer.h
Ehsan Akhgari 883849ee32 Bug 1145631 - Part 1: Replace MOZ_OVERRIDE and MOZ_FINAL with override and final in the tree; r=froydnj
This patch was automatically generated using the following script:

function convert() {
echo "Converting $1 to $2..."
find . \
       ! -wholename "*/.git*" \
       ! -wholename "obj-ff-dbg*" \
         -type f \
      \( -iname "*.cpp" \
         -o -iname "*.h" \
         -o -iname "*.c" \
         -o -iname "*.cc" \
         -o -iname "*.idl" \
         -o -iname "*.ipdl" \
         -o -iname "*.ipdlh" \
         -o -iname "*.mm" \) | \
    xargs -n 1 sed -i -e "s/\b$1\b/$2/g"
}

convert MOZ_OVERRIDE override
convert MOZ_FINAL final
2015-03-21 12:28:04 -04:00

78 lines
2.2 KiB
C++

/* -*- 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 MOZILLA_SHAREDBUFFER_H_
#define MOZILLA_SHAREDBUFFER_H_
#include "mozilla/CheckedInt.h"
#include "mozilla/mozalloc.h"
#include "nsCOMPtr.h"
#include "nsAutoPtr.h"
namespace mozilla {
/**
* Base class for objects with a thread-safe refcount and a virtual
* destructor.
*/
class ThreadSharedObject {
public:
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(ThreadSharedObject)
bool IsShared() { return mRefCnt.get() > 1; }
virtual size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const
{
return 0;
}
virtual size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
{
return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
}
protected:
// Protected destructor, to discourage deletion outside of Release():
virtual ~ThreadSharedObject() {}
};
/**
* Heap-allocated chunk of arbitrary data with threadsafe refcounting.
* Typically you would allocate one of these, fill it in, and then treat it as
* immutable while it's shared.
* This only guarantees 4-byte alignment of the data. For alignment we
* simply assume that the refcount is at least 4-byte aligned and its size
* is divisible by 4.
*/
class SharedBuffer : public ThreadSharedObject {
public:
void* Data() { return this + 1; }
static already_AddRefed<SharedBuffer> Create(size_t aSize)
{
CheckedInt<size_t> size = sizeof(SharedBuffer);
size += aSize;
if (!size.isValid()) {
MOZ_CRASH();
}
void* m = moz_xmalloc(size.value());
nsRefPtr<SharedBuffer> p = new (m) SharedBuffer();
NS_ASSERTION((reinterpret_cast<char*>(p.get() + 1) - reinterpret_cast<char*>(p.get())) % 4 == 0,
"SharedBuffers should be at least 4-byte aligned");
return p.forget();
}
virtual size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override
{
return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
}
private:
SharedBuffer() {}
};
}
#endif /* MOZILLA_SHAREDBUFFER_H_ */