mirror/guile
mirror/guile
1
Fork 0
mirror of https://git.savannah.gnu.org/git/guile.git synced 2025-05-01 04:10:18 +02:00
Code Activity

Add intrinsic for call/cc

Browse source 
* libguile/intrinsics.h: Add "capture-continuation" intrinsic.
* libguile/vm-engine.c (call/cc): Rework to use capture_continuation
  intrinsic.
* libguile/vm.c (capture_continuation): New intrinsic.
This commit is contained in:
Andy Wingo 2018-06-26 12:01:01 +02:00
parent 5804c977d7
commit ba23bc12fd
3 changed files with 21 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

15
libguile/vm.c
View file

@ -1298,6 +1298,20 @@ reinstate_continuation_x (scm_thread *thread, SCM cont)
scm_i_reinstate_continuation (cont);
}
static SCM
capture_continuation (scm_thread *thread, jmp_buf *registers)
{
struct scm_vm *vp = &thread->vm;
SCM vm_cont =
scm_i_vm_capture_stack (vp->stack_top,
SCM_FRAME_DYNAMIC_LINK (vp->fp),
SCM_FRAME_PREVIOUS_SP (vp->fp),
SCM_FRAME_RETURN_ADDRESS (vp->fp),
scm_dynstack_capture_all (&thread->dynstack),
0);
return scm_i_make_continuation (registers, thread, vm_cont);
}
SCM
scm_call_n (SCM proc, SCM *argv, size_t nargs)
{
@ -1642,6 +1656,7 @@ scm_bootstrap_vm (void)
scm_vm_intrinsics.bind_kwargs = bind_kwargs;
scm_vm_intrinsics.push_interrupt_frame = push_interrupt_frame;
scm_vm_intrinsics.reinstate_continuation_x = reinstate_continuation_x;
scm_vm_intrinsics.capture_continuation = capture_continuation;
sym_vm_run = scm_from_latin1_symbol ("vm-run");
sym_vm_error = scm_from_latin1_symbol ("vm-error");