forked from 0ad/0ad
53 lines
2.2 KiB
C
53 lines
2.2 KiB
C
/* Copyright (c) 2010 Wildfire Games
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/*
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* memory allocator helper routines.
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*/
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#ifndef INCLUDED_MEM_UTIL
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#define INCLUDED_MEM_UTIL
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LIB_API bool mem_IsPageMultiple(uintptr_t x);
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LIB_API size_t mem_RoundUpToPage(size_t size);
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LIB_API size_t mem_RoundUpToAlignment(size_t size);
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// very thin wrapper on top of sys/mman.h that makes the intent more obvious
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// (its commit/decommit semantics are difficult to tell apart)
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LIB_API LibError mem_Reserve(size_t size, u8** pp);
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LIB_API LibError mem_Release(u8* p, size_t size);
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LIB_API LibError mem_Commit(u8* p, size_t size, int prot);
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LIB_API LibError mem_Decommit(u8* p, size_t size);
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LIB_API LibError mem_Protect(u8* p, size_t size, int prot);
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// note: element memory is used to store a pointer to the next free element.
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// rationale for the function-based interface: a class encapsulating the
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// freelist pointer would force each header to include mem_util.h;
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// instead, implementations need only declare a void* pointer.
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LIB_API void mem_freelist_AddToFront(void*& freelist, void* el);
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LIB_API void* mem_freelist_Detach(void*& freelist);
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#endif // #ifndef INCLUDED_MEM_UTIL
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