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
struct stack_t { void * sp; std::size_t size; }; struct fcontext_t { < platform specific > stack_t fc_stack; }; intptr_t jump_fcontext( fcontext_t * ofc, fcontext_t const* nfc, intptr_t vp, bool preserve_fpu = true); fcontext_t * make_fcontext( void * sp, std::size_t size, void(* fn)(intptr_t) );
sp
Pointer to the beginning of the stack (depending of the architecture the stack grows downwards or upwards).
size
Size of the stack in bytes.
fc_stack
Tracks the memory for the context's stack.
intptr_t jump_fcontext( fcontext_t
* ofc, fcontext_t
* nfc, intptr_t p, bool
preserve_fpu =
true)
Stores the current context data (stack pointer, instruction pointer,
and CPU registers) to *ofc and restores the context data
from *nfc,
which implies jumping to *nfc's execution context. The intptr_t
argument, p, is passed
to the current context to be returned by the most recent call to jump_fcontext()
in the same thread. The last argument controls if fpu registers have
to be preserved.
The third pointer argument passed to the most recent call to jump_fcontext(),
if any.
fcontext_t *
make_fcontext(
void * sp, std::size_t size, void(*fn)(intptr_t))
Stack sp function pointer
fn are valid (depending
on the architecture sp
points to the top or bottom of the stack) and size
> 0.
Creates an fcontext_t at the beginning of the stack and prepares the
stack to execute the context-function fn.
Returns a pointer to fcontext_t which is placed on the stack.