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Diffstat (limited to '')
| -rw-r--r-- | sal/rtl/alloc_cache.cxx | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/sal/rtl/alloc_cache.cxx b/sal/rtl/alloc_cache.cxx new file mode 100644 index 000000000..1f165cca1 --- /dev/null +++ b/sal/rtl/alloc_cache.cxx @@ -0,0 +1,225 @@ +/* -*- 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 "alloc_cache.hxx" +#include "alloc_impl.hxx" +#include "alloc_arena.hxx" +#include <rtllifecycle.h> + +#include <cassert> +#include <cstdlib> +#include <string.h> +#include <stdio.h> + +/** + provided for cache_type allocations, and hash_table resizing. + + @internal +*/ +static rtl_arena_type * gp_cache_arena = nullptr; + +namespace +{ + +rtl_cache_type * rtl_cache_activate( + rtl_cache_type * cache, + const char * name, + size_t objsize, + size_t objalign, + int (SAL_CALL * constructor)(void * obj, void * userarg), + void (SAL_CALL * destructor) (void * obj, void * userarg), + void * userarg +) +{ + assert(cache); + + snprintf (cache->m_name, sizeof(cache->m_name), "%s", name); + + if (objalign == 0) + { + /* determine default alignment */ + if (objsize >= RTL_MEMORY_ALIGNMENT_8) + objalign = RTL_MEMORY_ALIGNMENT_8; + else + objalign = RTL_MEMORY_ALIGNMENT_4; + } + else + { + /* ensure minimum alignment */ + if(objalign < RTL_MEMORY_ALIGNMENT_4) + { + objalign = RTL_MEMORY_ALIGNMENT_4; + } + } + assert(RTL_MEMORY_ISP2(objalign)); + + cache->m_type_size = RTL_MEMORY_P2ROUNDUP(objsize, objalign); + + cache->m_constructor = constructor; + cache->m_destructor = destructor; + cache->m_userarg = userarg; + + return cache; +} + +} //namespace + +rtl_cache_type * SAL_CALL rtl_cache_create( + const char * name, + sal_Size objsize, + sal_Size objalign, + int (SAL_CALL * constructor)(void * obj, void * userarg), + void (SAL_CALL * destructor) (void * obj, void * userarg), + void (SAL_CALL * /*reclaim*/) (void * userarg), + void * userarg, + rtl_arena_type *, + int +) SAL_THROW_EXTERN_C() +{ + rtl_cache_type * result = nullptr; + sal_Size size = sizeof(rtl_cache_type); + +try_alloc: + result = static_cast<rtl_cache_type*>(rtl_arena_alloc (gp_cache_arena, &size)); + if (result) + { + rtl_cache_type * cache = result; + memset (cache, 0, sizeof(rtl_cache_type)); + + result = rtl_cache_activate ( + cache, + name, + objsize, + objalign, + constructor, + destructor, + userarg + ); + + if (!result) + { + /* activation failed */ + rtl_arena_free (gp_cache_arena, cache, size); + } + } + else if (!gp_cache_arena) + { + ensureCacheSingleton(); + if (gp_cache_arena) + { + /* try again */ + goto try_alloc; + } + } + return result; +} + +void SAL_CALL rtl_cache_destroy(rtl_cache_type * cache) SAL_THROW_EXTERN_C() +{ + if (cache) + { + rtl_arena_free (gp_cache_arena, cache, sizeof(rtl_cache_type)); + } +} + +void * SAL_CALL rtl_cache_alloc(rtl_cache_type * cache) SAL_THROW_EXTERN_C() +{ + void * obj = nullptr; + + if (!cache) + return nullptr; + + obj = std::malloc(cache->m_type_size); + if (obj && cache->m_constructor) + { + if (!(cache->m_constructor)(obj, cache->m_userarg)) + { + /* construction failure */ + std::free(obj); + obj = nullptr; + } + } + return obj; +} + +void SAL_CALL rtl_cache_free( + rtl_cache_type * cache, + void * obj +) SAL_THROW_EXTERN_C() +{ + if (obj && cache) + { + if (cache->m_destructor) + { + /* destruct object */ + (cache->m_destructor)(obj, cache->m_userarg); + } + std::free(obj); + } +} + +#if defined(SAL_UNX) + +void SAL_CALL rtl_secureZeroMemory(void *Ptr, sal_Size Bytes) SAL_THROW_EXTERN_C() +{ + //currently glibc doesn't implement memset_s + volatile char *p = static_cast<volatile char*>(Ptr); + while (Bytes--) + *p++ = 0; +} + +#elif defined(_WIN32) + +void SAL_CALL rtl_secureZeroMemory(void *Ptr, sal_Size Bytes) SAL_THROW_EXTERN_C() +{ + RtlSecureZeroMemory(Ptr, Bytes); +} + +#endif /* SAL_UNX || _WIN32 */ + +void rtl_cache_init() +{ + /* cache: internal arena */ + assert(!gp_cache_arena); + + gp_cache_arena = rtl_arena_create ( + "rtl_cache_internal_arena", + 64, /* quantum */ + 0, /* no quantum caching */ + nullptr, /* default source */ + rtl_arena_alloc, + rtl_arena_free, + 0 /* flags */ + ); + assert(gp_cache_arena); + + /* check 'gp_default_arena' initialization */ + assert(gp_default_arena); +} + +void rtl_cache_fini() +{ + if (gp_cache_arena) + { + rtl_arena_destroy (gp_cache_arena); + gp_cache_arena = nullptr; + } +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |