1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/xpcom/ds/nsStaticAtom.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,47 @@
1.4 +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef nsStaticAtom_h__
1.10 +#define nsStaticAtom_h__
1.11 +
1.12 +#include "nsIAtom.h"
1.13 +#include "nsStringBuffer.h"
1.14 +#include "prlog.h"
1.15 +
1.16 +typedef char16_t nsStaticAtomStringType;
1.17 +
1.18 +#define NS_STATIC_ATOM(buffer_name, atom_ptr) { (nsStringBuffer*) &buffer_name, atom_ptr }
1.19 +#define NS_STATIC_ATOM_BUFFER(buffer_name, str_data) static nsFakeStringBuffer< sizeof(str_data) > buffer_name = { 1, sizeof(str_data) * sizeof(nsStaticAtomStringType), MOZ_UTF16(str_data) };
1.20 +
1.21 +/**
1.22 + * Holds data used to initialize large number of atoms during startup. Use
1.23 + * the above macros to initialize these structs. They should never be accessed
1.24 + * directly other than from AtomTable.cpp
1.25 + */
1.26 +struct nsStaticAtom {
1.27 + nsStringBuffer* mStringBuffer;
1.28 + nsIAtom ** mAtom;
1.29 +};
1.30 +
1.31 +/**
1.32 + * This is a struct with the same binary layout as a nsStringBuffer.
1.33 + */
1.34 +template <uint32_t size>
1.35 +struct nsFakeStringBuffer {
1.36 + int32_t mRefCnt;
1.37 + uint32_t mSize;
1.38 + nsStaticAtomStringType mStringData[size];
1.39 +};
1.40 +
1.41 +// Register an array of static atoms with the atom table
1.42 +template<uint32_t N>
1.43 +nsresult
1.44 +NS_RegisterStaticAtoms(const nsStaticAtom (&atoms)[N])
1.45 +{
1.46 + extern nsresult RegisterStaticAtoms(const nsStaticAtom*, uint32_t aAtomCount);
1.47 + return RegisterStaticAtoms(atoms, N);
1.48 +}
1.49 +
1.50 +#endif
