/usr/include/crystalspace-2.0/csutil/memheap.h is in libcrystalspace-dev 2.0+dfsg-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 | /*
Copyright (C) 2006 by Frank Richter
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __CS_CSUTIL_MEMHEAP_H__
#define __CS_CSUTIL_MEMHEAP_H__
/**\file
* Separate memory heap.
*/
#if defined(CS_MEMORY_TRACKER)
#include "csutil/csstring.h"
#include "csutil/memdebug.h"
#include <typeinfo>
#endif
#include "csutil/spinlock.h"
/**\addtogroup util_memory
* @{ */
namespace CS
{
namespace Memory
{
/**
* A separate heap from which memory can be allocated.
* \remarks Memory must be freed by the same heap it was allocated from.
* \remarks Thread-safe.
*/
class CS_CRYSTALSPACE_EXPORT Heap
{
/// The 'mspace' used by this heap.
void* mspace;
SpinLock lock;
Heap (Heap const&); // Illegal; unimplemented.
void operator= (Heap const&); // Illegal; unimplemented.
public:
Heap();
~Heap();
/// Allocate a block of memory of size \p n.
void* Alloc (const size_t n);
/// Free the block \p p.
void Free (void* p);
/// Resize the allocated block \p p to size \p newSize.
void* Realloc (void* p, size_t newSize);
/**
* Try to return as much unused memory to the system as possible.
* \p pad optionally specifies a minimum amount of memory to be
* retained, in case future allocations are anticipated.
*/
void Trim (size_t pad = 0);
/**
* Return the total amount of memory used for this heap.
*/
size_t Footprint ();
};
/**
* A memory allocator that allocates from a heap.
* The \p HeapAccess template argument must behave like the Heap
* class. \sa HeapAccessPointer
*/
template<class HeapAccess>
class AllocatorHeapBase : protected HeapAccess
{
#if defined(CS_MEMORY_TRACKER)
const char* mti;
#endif
public:
#if defined(CS_MEMORY_TRACKER)
AllocatorHeapBase () : mti (0) { }
AllocatorHeapBase (const HeapAccess& heap) : HeapAccess (heap), mti (0) {}
#else
AllocatorHeapBase () { }
AllocatorHeapBase (const HeapAccess& heap) : HeapAccess (heap) {}
#endif
/// Allocate a block of memory of size \p n.
void* Alloc (const size_t n)
{
#if defined(CS_MEMORY_TRACKER)
void* p = HeapAccess::Alloc (n);
if (mti == 0)
{
/*csString mtiInfo;
mtiInfo.Format ("%s with %p", typeid(*this).name(), HeapAccess::GetHeap());*/
mti = /*mtiInfo*/typeid(*this).name();
}
CS::Debug::MemTracker::RegisterAlloc (p, n, mti);
return p;
#else
return HeapAccess::Alloc (n);
#endif
}
/// Free the block \p p.
void Free (void* p)
{
#if defined(CS_MEMORY_TRACKER)
CS::Debug::MemTracker::RegisterFree (p);
#endif
HeapAccess::Free (p);
}
/// Resize the allocated block \p p to size \p newSize.
void* Realloc (void* p, size_t newSize)
{
#ifdef CS_MEMORY_TRACKER
if (p == 0) return Alloc (newSize);
void* np = HeapAccess::Realloc (p, newSize);
CS::Debug::MemTracker::UpdateSize (p, np, newSize);
return np;
#else
return HeapAccess::Realloc (p, newSize);
#endif
}
/// Set the information used for memory tracking.
void SetMemTrackerInfo (const char* info)
{
#ifdef CS_MEMORY_TRACKER
if (mti != 0) return;
/*csString mtiInfo;
mtiInfo.Format ("%s with %p for %s", typeid(*this).name(),
HeapAccess::GetHeap(), info);*/
mti = info;
#else
(void)info;
#endif
}
};
/**
* Heap accessor for AllocatorHeapBase.
* The \p HeapContainer template argument must behave like a pointer to
* an object of type Heap* or compatible interface.
*/
template<class HeapContainer = Heap*>
struct HeapAccessPointer
{
HeapContainer heap;
CS_DEPRECATED_METHOD_MSG ("HeapAccessPointer instance uninitialized")
HeapAccessPointer () {}
HeapAccessPointer (HeapContainer heap) : heap (heap) {}
void* Alloc (const size_t n)
{
return heap->Alloc (n);
}
void Free (void* p)
{
heap->Free (p);
}
void* Realloc (void* p, size_t newSize)
{
return heap->Realloc (p, newSize);
}
const HeapContainer& GetHeap ()
{
return heap;
}
};
/**
* A memory allocator that allocates from a heap.
* The \p HeapPtr template argument must be a type that can be converted
* to Heap*.
*/
template<class HeapPtr = Heap*>
class AllocatorHeap : public AllocatorHeapBase<HeapAccessPointer<HeapPtr> >
{
public:
CS_DEPRECATED_METHOD_MSG ("AllocatorHeap instance uninitialized")
AllocatorHeap () {}
AllocatorHeap (HeapPtr heap) :
AllocatorHeapBase<HeapAccessPointer<HeapPtr> > (
HeapAccessPointer<HeapPtr> (heap)) {}
};
} // namespace Memory
} // namespace CS
/** @} */
#endif // __CS_CSUTIL_MEMHEAP_H__
|