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__gnu_cxx::__pool_alloc_base(3cxx) __gnu_cxx::__pool_alloc_base(3cxx)

NAME

__gnu_cxx::__pool_alloc_base - Base class for __pool_alloc.

SYNOPSIS

#include <pool_allocator.h>

Inherited by __gnu_cxx::__pool_alloc< _Tp > [private].

Protected Types


enum { _S_align }
enum { _S_max_bytes }
enum { _S_free_list_size }

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.

Definition at line 75 of file pool_allocator.h.

Member Enumeration Documentation

anonymous enum [protected]

Definition at line 80 of file pool_allocator.h.

anonymous enum [protected]

Definition at line 81 of file pool_allocator.h.

anonymous enum [protected]

Definition at line 82 of file pool_allocator.h.

Member Function Documentation

size_t __gnu_cxx::__pool_alloc_base::_M_round_up (size_t __bytes) [inline], [protected]

Definition at line 98 of file pool_allocator.h.

Member Data Documentation

char* __gnu_cxx::__pool_alloc_base::_S_end_free [static], [protected]

Definition at line 94 of file pool_allocator.h.

_Obj* volatile __gnu_cxx::__pool_alloc_base::_S_free_list[_S_free_list_size] [static], [protected]

Definition at line 90 of file pool_allocator.h.

size_t __gnu_cxx::__pool_alloc_base::_S_heap_size [static], [protected]

Definition at line 95 of file pool_allocator.h.

char* __gnu_cxx::__pool_alloc_base::_S_start_free [static], [protected]

Definition at line 93 of file pool_allocator.h.

Author

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Mon Oct 3 2022 libstdc++