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Class fixedsize_stack

Boost.Fiber provides the class __fixedsize__ which models the stack-allocator concept. In contrast to __protected_fixedsize__ it does not append a guard page at the end of each stack. The memory is simply managed by std::malloc() and std::free().

#include <boost/context/fixedsize_stack.hpp>

struct fixedsize_stack {
    fixedsize_stack(std::size_t size = traits_type::default_size());

    stack_context allocate();

    void deallocate( stack_context &);
}
stack_context allocate()

Preconditions:

traits_type::minimum_size() <= size and traits_type::is_unbounded() || ( traits_type::maximum_size() >= size).

Effects:

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)

Preconditions:

sctx.sp is valid, traits_type::minimum_size() <= sctx.size and traits_type::is_unbounded() || ( traits_type::maximum_size() >= sctx.size).

Effects:

Deallocates the stack space.


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