Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Boost.Coroutine2 supports usage of a segmented_stack, e. g. the size of the stack grows on demand. The coroutine is created with a minimal stack size and will be increased as required. Class segmented_stack models the stack-allocator concept. In contrast to protected_fixedsize_stack and fixedsize_stack it creates a stack which grows on demand.
![[Note]](../../../../../../doc/src/images/note.png) |
Note |
|---|---|
Segmented stacks are currently only supported by gcc
from version 4.7 and clang
from version 3.4 onwards. In order to
use a segmented-stack Boost.Coroutine2
must be built with property |
#include <boost/coroutine2/segmented_stack.hpp> struct segmented_stack { segmented_stack(std::size_t size = traits_type::default_size()); stack_context allocate(); void deallocate( stack_context &); }
stack_context allocate()
traits_type::minimum:size()
<= size
and ! traits_type::is_unbounded() &&
( traits_type::maximum:size() >= size).
Allocates memory of at least size
bytes and stores a pointer to the stack and its actual size in sctx. Depending on the architecture
(the stack grows downwards/upwards) the stored address is the highest/lowest
address of the stack.
void deallocate( stack_context
& sctx)
sctx.sp is valid, traits_type::minimum:size() <= sctx.size and !
traits_type::is_unbounded()
&& (
traits_type::maximum:size()
>= sctx.size).
Deallocates the stack space.
|
Note |
|---|---|
If the library is compiled for segmented stacks, segmented-stack is the only available stack allocator. |