Boost C++ Libraries

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Attributes

Class attributes is used to specify parameters required to setup a coroutine's context.

enum flag_unwind_t
{
    stack_unwind,
    no_stack_unwind
};

enum flag_fpu_t
{
    fpu_preserved,
    fpu_not_preserved
};

struct attributes
{
    std::size_t     size;
    flag_unwind_t   do_unwind;
    flag_fpu_t      preserve_fpu;

    attributes() noexcept;

    explicit attributes( std::size_t size_) noexcept;

    explicit attributes( flag_unwind_t do_unwind_) noexcept;

    explicit attributes( flag_fpu_t preserve_fpu_) noexcept;

    explicit attributes( std::size_t size_, flag_unwind_t do_unwind_) noexcept;

    explicit attributes( std::size_t size_, flag_fpu_t preserve_fpu_) noexcept;

    explicit attributes( flag_unwind_t do_unwind_, flag_fpu_t preserve_fpu_) noexcept;

    explicit attributes( std::size_t size_, flag_unwind_t do_unwind_, flag_fpu_t preserve_fpu_) noexcept;
};

attributes()

Effects:

Default constructor using boost::context::default_stacksize(), does unwind the stack after coroutine/generator is complete and preserves FPU registers.

Throws:

Nothing.

attributes( std::size_t size)

Effects:

Argument size defines stack size of the new coroutine. Stack unwinding after termination and preserving FPU registers is set by default.

Throws:

Nothing.

attributes( flag_unwind_t do_unwind)

Effects:

Argument do_unwind determines if stack will be unwound after termination or not. The default stacksize is used for the new coroutine and FPU registers are preserved.

Throws:

Nothing.

attributes( flag_fpu_t preserve_fpu)

Effects:

Argument preserve_fpu determines if FPU register have to be preserved across context switches. The default stacksize is used for the new coroutine and its stack will be unwound after termination.

Throws:

Nothing.

attributes( std::size_t size, flag_unwind_t do_unwind)

Effects:

Arguments size and do_unwind are given by the user. FPU registers are preserved across each context switch.

Throws:

Nothing.

attributes( std::size_t size, flag_fpu_t preserve_fpu)

Effects:

Arguments size and preserve_fpu are given by the user. The stack is automatically unwound after coroutine/generator terminates.

Throws:

Nothing.

attributes( flag_unwind_t do_unwind, flag_fpu_t preserve_fpu)

Effects:

Arguments do_unwind and preserve_fpu are given by the user. The stack gets a default value of boost::context::default_stacksize().

Throws:

Nothing.

attributes( std::size_t size, flag_unwind_t do_unwind, flag_fpu_t preserve_fpu)

Effects:

Arguments size, do_unwind and preserve_fpu are given by the user.

Throws:

Nothing.


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