pion-net
4.0.9
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#include <PionPoolAllocator.hpp>
Inherits noncopyable.
Classes | |
struct | FixedSizeAlloc |
Public Member Functions | |
virtual | ~PionPoolAllocator () |
virtual destructor | |
PionPoolAllocator (void) | |
default constructor | |
void * | malloc (std::size_t n) |
void | free (void *ptr, std::size_t n) |
bool | release_memory (size_t pad=10240000UL) |
Protected Types | |
enum | { NumberOfAllocs = ((MaxSize-1) / MinSize) + 1 } |
constant representing the number of fixed-size pool allocators | |
typedef void * | FreeListPtr |
Protected Member Functions | |
BOOST_STATIC_ASSERT (MaxSize >=MinSize) | |
BOOST_STATIC_ASSERT (MaxSize%MinSize==0) | |
FixedSizeAlloc * | getPool (const std::size_t n) |
PionPoolAllocator: a thread-safe, small object allocator that sacrifices memory utilization for performance. It combines a collection of fixed-size pooled memory allocators with lock-free caches to achieve nearly wait-free, constant time performance when used for an extended period of time
Definition at line 52 of file PionPoolAllocator.hpp.
pion::PionPoolAllocator< MinSize, MaxSize >::BOOST_STATIC_ASSERT | ( | MaxSize >= | MinSize | ) | [protected] |
ensure that: a) MaxSize >= MinSize b) MaxSize is a multiple of MinSize c) MinSize >= sizeof(FreeNodePtr) [usually 16]
void pion::PionPoolAllocator< MinSize, MaxSize >::free | ( | void * | ptr, |
std::size_t | n | ||
) | [inline] |
deallocates a block of memory
ptr | raw pointer to the block of memory |
n | requested size of the memory block, in bytes (actual size may be larger) |
Definition at line 106 of file PionPoolAllocator.hpp.
References pion::PionPoolAllocator< MinSize, MaxSize >::getPool(), pion::PionPoolAllocator< MinSize, MaxSize >::FixedSizeAlloc::m_free_ptr, pion::PionPoolAllocator< MinSize, MaxSize >::FixedSizeAlloc::m_mutex, and pion::PionPoolAllocator< MinSize, MaxSize >::FixedSizeAlloc::m_pool.
FixedSizeAlloc* pion::PionPoolAllocator< MinSize, MaxSize >::getPool | ( | const std::size_t | n | ) | [inline, protected] |
gets an appropriate fixed-size pool allocator
n | the number of bytes to be (de)allocated |
Definition at line 236 of file PionPoolAllocator.hpp.
Referenced by pion::PionPoolAllocator< MinSize, MaxSize >::free(), and pion::PionPoolAllocator< MinSize, MaxSize >::malloc().
void* pion::PionPoolAllocator< MinSize, MaxSize >::malloc | ( | std::size_t | n | ) | [inline] |
allocates a block of memory
n | minimum size of the new memory block, in bytes |
Definition at line 76 of file PionPoolAllocator.hpp.
References pion::PionPoolAllocator< MinSize, MaxSize >::getPool(), pion::PionPoolAllocator< MinSize, MaxSize >::FixedSizeAlloc::m_free_ptr, pion::PionPoolAllocator< MinSize, MaxSize >::FixedSizeAlloc::m_mutex, and pion::PionPoolAllocator< MinSize, MaxSize >::FixedSizeAlloc::m_pool.
bool pion::PionPoolAllocator< MinSize, MaxSize >::release_memory | ( | size_t | pad = 10240000UL | ) | [inline] |
releases every memory block that does not have any allocated chunks
pad | padding bytes passed to malloc_trim(), if it's supported (default=10MB) |
Definition at line 141 of file PionPoolAllocator.hpp.