1 // Created on: 2005-03-15
2 // Created by: Peter KURNEV
3 // Copyright (c) 1998-1999 Matra Datavision
4 // Copyright (c) 1999-2014 OPEN CASCADE SAS
6 // This file is part of Open CASCADE Technology software library.
8 // This library is free software; you can redistribute it and/or modify it under
9 // the terms of the GNU Lesser General Public License version 2.1 as published
10 // by the Free Software Foundation, with special exception defined in the file
11 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
12 // distribution for complete text of the license and disclaimer of any warranty.
14 // Alternatively, this file may be used under the terms of Open CASCADE
15 // commercial license or contractual agreement.
18 #include <Standard.hxx>
19 #include <Standard_MMgrOpt.hxx>
20 #include <Standard_MMgrRaw.hxx>
21 #include <Standard_MMgrTBBalloc.hxx>
24 #if(defined(_WIN32) || defined(__WIN32__))
30 #if defined(_MSC_VER) || defined(__ANDROID__) || defined(__QNX__)
32 #elif (defined(__GNUC__) && __GNUC__ >= 4 && __GNUC_MINOR__ >= 1 && defined(__i386))
33 #include <mm_malloc.h>
35 extern "C" int posix_memalign (void** thePtr, size_t theAlign, size_t theSize);
38 #ifndef OCCT_MMGT_OPT_DEFAULT
39 #define OCCT_MMGT_OPT_DEFAULT 0
42 //=======================================================================
43 //class : Standard_MMgrFactory
44 //purpose : Container for pointer to memory manager;
45 // used to construct appropriate memory manager according
46 // to environment settings, and to ensure destruction upon exit
47 //=======================================================================
48 class Standard_MMgrFactory
51 static Standard_MMgrRoot* GetMMgr();
52 ~Standard_MMgrFactory();
55 Standard_MMgrFactory();
56 Standard_MMgrFactory (const Standard_MMgrFactory&);
57 Standard_MMgrFactory& operator= (const Standard_MMgrFactory&);
60 Standard_MMgrRoot* myFMMgr;
63 //=======================================================================
64 //function : Standard_MMgrFactory
65 //purpose : Check environment variables and create appropriate memory manager
66 //=======================================================================
68 Standard_MMgrFactory::Standard_MMgrFactory()
71 /*#if defined(_MSC_VER) && (_MSC_VER > 1400)
72 // Turn ON thread-safe C locale globally to avoid side effects by setlocale() calls between threads.
73 // After this call all following _configthreadlocale() will be ignored assuming
74 // Notice that this is MSVCRT feature - on POSIX systems xlocale API (uselocale instead of setlocale)
75 // should be used explicitly to ensure thread-safety!
77 // This is not well documented call because _ENABLE_PER_THREAD_LOCALE_GLOBAL flag is defined but not implemented for some reason.
78 // -1 will set global locale flag to force _ENABLE_PER_THREAD_LOCALE_GLOBAL + _ENABLE_PER_THREAD_LOCALE_NEW behaviour
79 // although there NO way to turn it off again and following calls will have no effect (locale will be changed only for current thread).
80 _configthreadlocale (-1);
84 aVar = getenv ("MMGT_OPT");
85 Standard_Integer anAllocId = (aVar ? atoi (aVar): OCCT_MMGT_OPT_DEFAULT);
87 #if defined(_WIN32) && !defined(_WIN64) && !defined(__MINGW32__)
88 static const DWORD _SSE2_FEATURE_BIT(0x04000000);
91 // CR25396: Check if SSE2 instructions are supported, if not then use MMgrRaw
92 // instead of MMgrTBBalloc. It is to avoid runtime crash when running on a
93 // CPU that supports SSE but does not support SSE2 (some modifications of
95 DWORD volatile dwFeature;
103 // get the CPU feature bits
113 if ((dwFeature & _SSE2_FEATURE_BIT) == 0)
118 aVar = getenv ("MMGT_CLEAR");
119 Standard_Boolean toClear = (aVar ? (atoi (aVar) != 0) : Standard_True);
121 // on Windows (actual for XP and 2000) activate low fragmentation heap
122 // for CRT heap in order to get best performance.
123 // Environment variable MMGT_LFH can be used to switch off this action (if set to 0)
124 #if defined(_MSC_VER)
125 aVar = getenv ("MMGT_LFH");
126 if ( aVar == NULL || atoi (aVar) != 0 )
129 HANDLE aCRTHeap = (HANDLE)_get_heap_handle();
130 HeapSetInformation (aCRTHeap, HeapCompatibilityInformation, &aHeapInfo, sizeof(aHeapInfo));
136 case 1: // OCCT optimized memory allocator
138 aVar = getenv ("MMGT_MMAP");
139 Standard_Boolean bMMap = (aVar ? (atoi (aVar) != 0) : Standard_True);
140 aVar = getenv ("MMGT_CELLSIZE");
141 Standard_Integer aCellSize = (aVar ? atoi (aVar) : 200);
142 aVar = getenv ("MMGT_NBPAGES");
143 Standard_Integer aNbPages = (aVar ? atoi (aVar) : 1000);
144 aVar = getenv ("MMGT_THRESHOLD");
145 Standard_Integer aThreshold = (aVar ? atoi (aVar) : 40000);
146 myFMMgr = new Standard_MMgrOpt (toClear, bMMap, aCellSize, aNbPages, aThreshold);
149 case 2: // TBB memory allocator
150 myFMMgr = new Standard_MMgrTBBalloc (toClear);
153 default: // system default memory allocator
154 myFMMgr = new Standard_MMgrRaw (toClear);
158 //=======================================================================
159 //function : ~Standard_MMgrFactory
161 //=======================================================================
163 Standard_MMgrFactory::~Standard_MMgrFactory()
166 myFMMgr->Purge(Standard_True);
169 //=======================================================================
172 // This static function has a purpose to wrap static holder for memory
175 // Wrapping holder inside a function is needed to ensure that it will
176 // be initialized not later than the first call to memory manager (that
177 // would be impossible to guarantee if holder was static variable on
178 // global or file scope, because memory manager may be called from
179 // constructors of other static objects).
181 // Note that at the same time we could not guarantee that the holder
182 // object is destroyed after last call to memory manager, since that
183 // last call may be from static Handle() object which has been initialized
184 // dynamically during program execution rather than in its constructor.
186 // Therefore holder currently does not call destructor of the memory manager
187 // but only its method Purge() with Standard_True.
189 // To free the memory completely, we probably could use compiler-specific
190 // pragmas (such as '#pragma fini' on SUN Solaris and '#pragma init_seg' on
191 // WNT MSVC++) to put destructing function in code segment that is called
192 // after destructors of other (even static) objects. However, this is not
193 // done by the moment since it is compiler-dependent and there is no guarantee
194 // thatsome other object calling memory manager is not placed also in that segment...
196 // Note that C runtime function atexit() could not help in this problem
197 // since its behaviour is the same as for destructors of static objects
198 // (see ISO 14882:1998 "Programming languages -- C++" 3.6.3)
200 // The correct approach to deal with the problem would be to have memory manager
201 // to properly control its memory allocation and caching free blocks so
202 // as to release all memory as soon as it is returned to it, and probably
203 // even delete itself if all memory it manages has been released and
204 // last call to method Purge() was with True.
206 // Note that one possible method to control memory allocations could
207 // be counting calls to Allocate() and Free()...
209 //=======================================================================
210 Standard_MMgrRoot* Standard_MMgrFactory::GetMMgr()
212 static Standard_MMgrFactory aFactory;
213 return aFactory.myFMMgr;
216 //=======================================================================
217 //function : Allocate
219 //=======================================================================
221 Standard_Address Standard::Allocate(const Standard_Size size)
223 return Standard_MMgrFactory::GetMMgr()->Allocate(size);
226 //=======================================================================
229 //=======================================================================
231 void Standard::Free (Standard_Address theStorage)
233 Standard_MMgrFactory::GetMMgr()->Free(theStorage);
236 //=======================================================================
237 //function : Reallocate
239 //=======================================================================
241 Standard_Address Standard::Reallocate (Standard_Address theStorage,
242 const Standard_Size theSize)
244 return Standard_MMgrFactory::GetMMgr()->Reallocate (theStorage, theSize);
247 //=======================================================================
250 //=======================================================================
252 Standard_Integer Standard::Purge()
254 return Standard_MMgrFactory::GetMMgr()->Purge();
257 //=======================================================================
258 //function : AllocateAligned
260 //=======================================================================
262 Standard_Address Standard::AllocateAligned (const Standard_Size theSize,
263 const Standard_Size theAlign)
265 #if defined(_MSC_VER)
266 return _aligned_malloc (theSize, theAlign);
267 #elif defined(__ANDROID__) || defined(__QNX__)
268 return memalign (theAlign, theSize);
269 #elif (defined(__GNUC__) && __GNUC__ >= 4 && __GNUC_MINOR__ >= 1 && defined(__i386))
270 return _mm_malloc (theSize, theAlign);
273 if (posix_memalign (&aPtr, theAlign, theSize))
281 //=======================================================================
282 //function : FreeAligned
284 //=======================================================================
286 void Standard::FreeAligned (Standard_Address thePtrAligned)
288 #if defined(_MSC_VER)
289 _aligned_free (thePtrAligned);
290 #elif defined(__ANDROID__) || defined(__QNX__)
291 free (thePtrAligned);
292 #elif (defined(__GNUC__) && __GNUC__ >= 4 && __GNUC_MINOR__ >= 1 && defined(__i386))
293 _mm_free (thePtrAligned);
295 free (thePtrAligned);