__gnu_cxx::__pool_alloc_base3
Base class for __pool_alloc.
Usage
#include <pool_allocator.h>
Inherited by __gnu_cxx::__pool_alloc< _Tp1 > [private], and __gnu_cxx::__pool_alloc< _Tp > [private].
Protected Types
enum { _S_free_list_size }
enum { _S_max_bytes }
enum { _S_align }
Protected Member Functions
char * _M_allocate_chunk (size_t __n, int &__nobjs)
_Obj *volatile * _M_get_free_list (size_t __bytes) throw ()
__mutex & _M_get_mutex () throw ()
void * _M_refill (size_t __n)
size_t _M_round_up (size_t __bytes)
Static Protected Attributes
static char * _S_end_free
static _Obj *volatile _S_free_list [_S_free_list_size]
static size_t _S_heap_size
static char * _S_start_free
Detailed Description
Base class for __pool_alloc.
Uses various allocators to fulfill underlying requests (and makes as few requests as possible when in default high-speed pool mode).
Important implementation properties:
- 0.
-
If globally mandated, then allocate objects from new
- 1.
-
If the clients request an object of size > _S_max_bytes, the resulting object will be obtained directly from new
- 2.
-
In all other cases, we allocate an object of size exactly _S_round_up(requested_size). Thus the client has enough size information that we can return the object to the proper free list without permanently losing part of the object.
Releases
4 releases since Debian 3.1 (Sarge); the text changed 3 times.