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| -rw-r--r-- | include/rtl/alloc.h | 332 |
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diff --git a/include/rtl/alloc.h b/include/rtl/alloc.h new file mode 100644 index 000000000..74d4ea5c4 --- /dev/null +++ b/include/rtl/alloc.h @@ -0,0 +1,332 @@ +/* -*- 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 . + */ + +#ifndef INCLUDED_RTL_ALLOC_H +#define INCLUDED_RTL_ALLOC_H + +#include "sal/config.h" + +#include "sal/saldllapi.h" +#include "sal/types.h" + +#ifdef __cplusplus +extern "C" { +#endif + + +/** Allocate memory. + + A call to this function will return NULL upon the requested + memory size being either zero or larger than currently allocatable. + + @param[in] Bytes memory size. + @return pointer to the allocated memory. + */ +SAL_DLLPUBLIC void * SAL_CALL rtl_allocateMemory ( + sal_Size Bytes +) SAL_THROW_EXTERN_C(); + + +/** Reallocate memory. + + A call to this function with parameter 'Ptr' being NULL + is equivalent to a rtl_allocateMemory() call. + A call to this function with parameter 'Bytes' being 0 + is equivalent to a rtl_freeMemory() call. + + @see rtl_allocateMemory() + @see rtl_freeMemory() + + @param[in] Ptr pointer to the previously allocated memory. + @param[in] Bytes new memory size. + @return pointer to the reallocated memory. May differ from Ptr. + */ +SAL_DLLPUBLIC void * SAL_CALL rtl_reallocateMemory ( + void * Ptr, + sal_Size Bytes +) SAL_THROW_EXTERN_C(); + + +/** Free memory. + @param[in] Ptr pointer to the previously allocated memory. + @return none. Memory is released. Ptr is invalid. + */ +SAL_DLLPUBLIC void SAL_CALL rtl_freeMemory ( + void * Ptr +) SAL_THROW_EXTERN_C(); + +/** Allocate and zero memory. + + A call to this function will return NULL upon the requested + memory size being either zero or larger than currently allocatable. + + @param[in] Bytes memory size. + @return pointer to the allocated and zero'ed memory. + */ +SAL_DLLPUBLIC void * SAL_CALL rtl_allocateZeroMemory ( + sal_Size Bytes +) SAL_THROW_EXTERN_C(); + +/** Zero memory + + Fills a block of memory with zeros in a way that is guaranteed to be secure + + @param[in] Ptr pointer to the previously allocated memory. + @param[in] Bytes memory size. + + @since LibreOffice 5.0 + */ +SAL_DLLPUBLIC void SAL_CALL rtl_secureZeroMemory ( + void * Ptr, + sal_Size Bytes +) SAL_THROW_EXTERN_C(); + + +/** Zero and free memory. + @param[in] Ptr pointer to the previously allocated memory. + @param[in] Bytes memory size. + @return none. Memory is zero'ed with rtl_secureZeroMemory() and released. + Ptr is invalid. + */ +SAL_DLLPUBLIC void SAL_CALL rtl_freeZeroMemory ( + void * Ptr, + sal_Size Bytes +) SAL_THROW_EXTERN_C(); + +/** Allocate aligned memory. + + A call to this function will return NULL upon the requested + memory size being either zero or larger than currently allocatable. + + Memory obtained through this function must be freed with + rtl_freeAlignedMemory(). + + @param[in] Alignment alignment in bytes, must be a power of two multiple of + sizeof(void*). + @param[in] Bytes memory size. + @return pointer to the allocated memory. + + @since LibreOffice 4.3 + */ +SAL_DLLPUBLIC void* SAL_CALL rtl_allocateAlignedMemory ( + sal_Size Alignment, + sal_Size Bytes +) SAL_THROW_EXTERN_C(); + + +/** Free memory allocated with rtl_allocateAlignedMemory(). + + @param[in] Ptr pointer to the previously allocated memory. + @return none. Memory is released. Ptr is invalid. + + @since LibreOffice 4.3 + */ +SAL_DLLPUBLIC void SAL_CALL rtl_freeAlignedMemory ( + void * Ptr +) SAL_THROW_EXTERN_C(); + + +/** Opaque rtl_arena_type. + */ +typedef struct SAL_DLLPUBLIC_RTTI rtl_arena_st rtl_arena_type; + +#define RTL_ARENA_NAME_LENGTH 31 + + +/** + * @param[in] pName descriptive name; for debugging purposes. + * @param[in] quantum resource allocation unit / granularity; rounded up to next power of 2. + * @param[in] quantum_cache_max no longer used, should be 0. + * @param[in] source_arena passed as argument to source_alloc, source_free; usually NULL. + * @param[in] source_alloc function to allocate resources; usually rtl_arena_alloc. + * @param[in] source_free function to free resources; usually rtl_arena_free. + * @param[in] nFlags flags; usually 0. + * + * @return pointer to rtl_arena_type, or NULL upon failure. + * + * @see rtl_arena_destroy() + */ +SAL_DLLPUBLIC rtl_arena_type * SAL_CALL rtl_arena_create ( + const char * pName, + sal_Size quantum, + sal_Size quantum_cache_max, + rtl_arena_type * source_arena, + void * (SAL_CALL * source_alloc)(rtl_arena_type *, sal_Size *), + void (SAL_CALL * source_free) (rtl_arena_type *, void *, sal_Size), + int nFlags +) SAL_THROW_EXTERN_C(); + + +/** + * @param[in] pArena the arena to destroy. + * @return None + * + * @see rtl_arena_create() + */ +SAL_DLLPUBLIC void SAL_CALL rtl_arena_destroy ( + rtl_arena_type * pArena +) SAL_THROW_EXTERN_C(); + + +/** + * @param[in] pArena arena from which resource is allocated. + * @param[in,out] pBytes size of resource to allocate. + * + * @return allocated resource, or NULL upon failure. + * + * @see rtl_arena_free() + */ +SAL_DLLPUBLIC void * SAL_CALL rtl_arena_alloc ( + rtl_arena_type * pArena, + sal_Size * pBytes +) SAL_THROW_EXTERN_C(); + + +/** + * @param[in] pArena arena from which resource was allocated. + * @param[in] pAddr resource to free. + * @param[in] nBytes size of resource. + * + * @return None. + * + * @see rtl_arena_alloc() + */ +SAL_DLLPUBLIC void SAL_CALL rtl_arena_free ( + rtl_arena_type * pArena, + void * pAddr, + sal_Size nBytes +) SAL_THROW_EXTERN_C(); + + +/** Opaque rtl_cache_type. + */ +typedef struct rtl_cache_st rtl_cache_type; + +#define RTL_CACHE_NAME_LENGTH 31 + +#define RTL_CACHE_FLAG_BULKDESTROY 1 /* obsolete */ + +/** + * @param[in] pName descriptive name; for debugging purposes. + * @param[in] nObjSize object size. + * @param[in] nObjAlign object alignment; usually 0 for suitable default. + * @param[in] constructor object constructor callback function; returning 1 for success or 0 for failure. + * @param[in] destructor object destructor callback function. + * @param[in] reclaim reclaim callback function. + * @param[in] pUserArg opaque argument passed to callback functions. + * @param[in] pSource unused argument (should be null). + * @param[in] nFlags flags (unused). + * + * @return pointer to rtl_cache_type, or NULL upon failure. + * + * @see rtl_cache_destroy() + */ +SAL_DLLPUBLIC rtl_cache_type * SAL_CALL rtl_cache_create ( + const char * pName, + sal_Size nObjSize, + sal_Size nObjAlign, + int (SAL_CALL * constructor)(void * pObj, void * pUserArg), + void (SAL_CALL * destructor) (void * pObj, void * pUserArg), + void (SAL_CALL * reclaim) (void * pUserArg), + void * pUserArg, + rtl_arena_type * pSource, + int nFlags +) SAL_THROW_EXTERN_C(); + + +/** + * @param[in] pCache the cache to destroy. + * + * @return None. + * + * @see rtl_cache_create() + */ +SAL_DLLPUBLIC void SAL_CALL rtl_cache_destroy ( + rtl_cache_type * pCache +) SAL_THROW_EXTERN_C(); + + +/** + * @param[in] pCache cache from which object is allocated. + * + * @return pointer to the allocated object, or NULL upon failure. + */ +SAL_DLLPUBLIC void * SAL_CALL rtl_cache_alloc ( + rtl_cache_type * pCache +) SAL_THROW_EXTERN_C(); + + +/** + * @param[in] pCache cache from which object was allocated. + * @param[in] pObj object to free. + * + * @return None. + * + * @see rtl_cache_alloc() + */ +SAL_DLLPUBLIC void SAL_CALL rtl_cache_free ( + rtl_cache_type * pCache, + void * pObj +) SAL_THROW_EXTERN_C(); + + +#ifdef LIBO_INTERNAL_ONLY + +/** @cond INTERNAL */ +/** rtl_alloc_preInit + * + * This function, is called at the beginning and again + * at the end of LibreOfficeKit pre-initialization to enable + * various optimizations. + * + * Its function is to annotate a section @start = true + * to end (@start = false) via. two calls. Inside this + * section string allocators are replaced with ones which cause the + * strings to be staticized at the end of the section. + * + * This brings a number of constraints - in particular no + * string allocated outside the section should be freed + * inside it, practically this means starting the section + * as early as possible. No string allocated inside the + * section will be freed subsequently as they are + * staticized. + * + * This method is not thread-safe, nor intended for use in + * a threaded context, cf. previous constraints. + * + * It is almost certainly not the method that you want, + * use with extraordinary care referring to the + * implementation. + * + * @since LibreOffice 6.1 + */ +SAL_DLLPUBLIC void SAL_CALL rtl_alloc_preInit ( + sal_Bool start +) SAL_THROW_EXTERN_C(); +/** @endcond */ + +#endif + +#ifdef __cplusplus +} +#endif + +#endif // INCLUDED_RTL_ALLOC_H + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |