57f22d9b1a
Change-Id: I6871bfc0ae3d2427a4cd135cb37aad76dac0d7a4 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/132706 Tested-by: Jenkins Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>
90 lines
2.8 KiB
C++
90 lines
2.8 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <sal/config.h>
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#include <assert.h>
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#include <rtl/alloc.h>
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#include <rtl/ustring.h>
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#include <rtllifecycle.h>
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#include "strimp.hxx"
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#include "alloc_impl.hxx"
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#include "alloc_arena.hxx"
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/*
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* TODO: add a slower, more awful, but more space efficient
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* custom allocator for the pre-init phase. Existing slab
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* allocator's minimum alloc size is 24bytes, and by default
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* is 32 bytes.
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*/
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static rtl_arena_type *pre_arena = nullptr;
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rtl_allocateStringFn rtl_allocateString = malloc;
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rtl_freeStringFn rtl_freeString = free;
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extern "C" {
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static void *pre_allocateStringFn(size_t n)
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{
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sal_Size size = RTL_MEMORY_ALIGN(n + 4, 4);
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char *addr = static_cast<char*>(rtl_arena_alloc(pre_arena, &size));
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assert(size>= 12);
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reinterpret_cast<sal_uInt32*>(addr)[0] = size - 12;
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return addr + 4;
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}
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static void pre_freeStringFn(void *data)
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{
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char *addr = static_cast<char*>(data) - 4;
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sal_uInt32 size = reinterpret_cast<sal_uInt32*>(addr)[0] + 12;
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rtl_arena_free(pre_arena, addr, size);
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}
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} // extern "C"
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static void mark_static(void *addr, sal_Size /* size */)
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{
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char *inner = static_cast<char*>(addr) + 4;
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rtl_uString *str = reinterpret_cast<rtl_uString *>(inner);
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str->refCount |= SAL_STRING_STATIC_FLAG;
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}
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void SAL_CALL rtl_alloc_preInit (sal_Bool start) SAL_THROW_EXTERN_C()
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{
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if (start)
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{
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rtl_allocateString = pre_allocateStringFn;
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rtl_freeString = pre_freeStringFn;
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pre_arena = rtl_arena_create("pre-init strings", 4, 0,
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nullptr, rtl_arena_alloc,
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rtl_arena_free, 0);
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// To be consistent (and to ensure the rtl_cache threads are started).
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ensureCacheSingleton();
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}
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else
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{
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rtl_arena_foreach(pre_arena, mark_static);
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rtl_allocateString = malloc;
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rtl_freeString = free;
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// TODO: also re-initialize main allocator as well.
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}
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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