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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* 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/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <sal/config.h>
#include <assert.h>
#include <stdlib.h>
#include <rtl/alloc.h>
#include <rtl/ustring.h>
#include <rtllifecycle.h>
#include "strimp.hxx"
#include "alloc_impl.hxx"
#include "alloc_arena.hxx"
/*
* TODO: add a slower, more awful, but more space efficient
* custom allocator for the pre-init phase. Existing slab
* allocator's minimum alloc size is 24bytes, and by default
* is 32 bytes.
*/
static rtl_arena_type *pre_arena = nullptr;
rtl_allocateStringFn rtl_allocateString = malloc;
rtl_freeStringFn rtl_freeString = free;
extern "C" {
static void *pre_allocateStringFn(size_t n)
{
sal_Size size = RTL_MEMORY_ALIGN(n + 4, 4);
char *addr = static_cast<char*>(rtl_arena_alloc(pre_arena, &size));
assert(size>= 12);
reinterpret_cast<sal_uInt32*>(addr)[0] = size - 12;
return addr + 4;
}
static void pre_freeStringFn(void *data)
{
char *addr = static_cast<char*>(data) - 4;
sal_uInt32 size = reinterpret_cast<sal_uInt32*>(addr)[0] + 12;
rtl_arena_free(pre_arena, addr, size);
}
} // extern "C"
static void mark_static(void *addr, sal_Size /* size */)
{
char *inner = static_cast<char*>(addr) + 4;
rtl_uString *str = reinterpret_cast<rtl_uString *>(inner);
str->refCount |= SAL_STRING_STATIC_FLAG;
}
void SAL_CALL rtl_alloc_preInit (sal_Bool start) SAL_THROW_EXTERN_C()
{
if (start)
{
rtl_allocateString = pre_allocateStringFn;
rtl_freeString = pre_freeStringFn;
pre_arena = rtl_arena_create("pre-init strings", 4, 0,
nullptr, rtl_arena_alloc,
rtl_arena_free, 0);
// To be consistent (and to ensure the rtl_cache threads are started).
ensureCacheSingleton();
}
else
{
rtl_arena_foreach(pre_arena, mark_static);
rtl_allocateString = malloc;
rtl_freeString = free;
// TODO: also re-initialize main allocator as well.
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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