gecko/xpcom/ds/nsStaticAtom.h
2012-05-21 12:12:37 +01:00

56 lines
1.7 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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 nsStaticAtom_h__
#define nsStaticAtom_h__
#include "nsIAtom.h"
#include "nsStringBuffer.h"
#include "prlog.h"
#if defined(HAVE_CPP_CHAR16_T)
#define NS_STATIC_ATOM_USE_WIDE_STRINGS
typedef char16_t nsStaticAtomStringType;
#elif defined(HAVE_CPP_2BYTE_WCHAR_T)
#define NS_STATIC_ATOM_USE_WIDE_STRINGS
typedef wchar_t nsStaticAtomStringType;
#else
typedef char nsStaticAtomStringType;
#endif
#define NS_STATIC_ATOM(buffer_name, atom_ptr) { (nsStringBuffer*) &buffer_name, atom_ptr }
#define NS_STATIC_ATOM_BUFFER(buffer_name, str_data) static nsFakeStringBuffer< sizeof(str_data) > buffer_name = { 1, sizeof(str_data) * sizeof(nsStaticAtomStringType), NS_L(str_data) };
/**
* Holds data used to initialize large number of atoms during startup. Use
* the above macros to initialize these structs. They should never be accessed
* directly other than from AtomTable.cpp
*/
struct nsStaticAtom {
nsStringBuffer* mStringBuffer;
nsIAtom ** mAtom;
};
/**
* This is a struct with the same binary layout as a nsStringBuffer.
*/
template <PRUint32 size>
struct nsFakeStringBuffer {
PRInt32 mRefCnt;
PRUint32 mSize;
nsStaticAtomStringType mStringData[size];
};
// Register an array of static atoms with the atom table
template<PRUint32 N>
nsresult
NS_RegisterStaticAtoms(const nsStaticAtom (&atoms)[N])
{
extern nsresult RegisterStaticAtoms(const nsStaticAtom*, PRUint32 aAtomCount);
return RegisterStaticAtoms(atoms, N);
}
#endif