* libguile/vm.h (scm_c_vm_run): Make internal.
* libguile/vm.c (vm_default_engine): New static global variable.
(make_vm): Set vp->engine based on
(scm_vm_apply): Remove in favor of call-with-vm.
(scm_thread_vm, scm_set_thread_vm_x): Remove these, as they did not
have a well-defined meaning, and were dangerous to call on other
threads.
(scm_the_vm): Reinstate previous definition.
(symbol_to_vm_engine, vm_engine_to_symbol)
(vm_has_pending_computation): New helpers.
(scm_vm_engine, scm_set_vm_engine_x, scm_c_set_vm_engine_x): New
accessors for VM engines.
(scm_c_set_default_vm_engine_x, scm_set_default_vm_engine_x): New
setters for the default VM engine.
(scm_call_with_vm): New function, applies a procedure to arguments in
a context in which a given VM is current.
* libguile/eval.c (eval, scm_apply): VM dispatch goes through
scm_call_with_vm.
* test-suite/tests/control.test ("the-vm"):
* module/system/vm/coverage.scm (with-code-coverage): Use call-with-vm.
* module/system/vm/vm.scm: Update exports.
* test-suite/vm/run-vm-tests.scm (run-vm-program):
* test-suite/tests/compiler.test ("current-reader"): Just rely on the
result of make-program being an applicable.
* test-suite/tests/eval.test ("stack overflow"): Add a note that this
test does not test what it should.
* libguile/control.c (scm_c_abort): Change error string if a prompt
isn't found.
* test-suite/tests/control.test ("abort to unknown prompt"): New test.
* module/ice-9/boot-9.scm (default-prompt-tag, make-prompt-tag): New
functions.
(call-with-prompt, abort-to-prompt): Rename from `prompt' and `abort',
respectively. These names are more clear, and allow `prompt' and
`abort' to have more convenient, less general bindings.
(default-throw-handler, custom-throw-handler, catch, %start-stack):
Adapt callers.
* module/ice-9/control.scm: Adapt re-export list.
(control): Remove binding, until we're sure that it is Sitaram's
control.
(abort): New binding, aborts to the nearest prompt with the default
tag.
(%): Use call-with-prompt.
* module/language/tree-il/primitives.scm (*primitive-expand-table*):
(*interesting-primitive-names*): Adapt for prompt/abort changes.
* test-suite/tests/control.test: Take advantage of the defaults for %
and abort.
* test-suite/tests/control.test ("restarting partial continuations"):
Add more tests, for `abort' in different positions. All succeed in the
evaluator but fail with the compiler.
* libguile/control.h (SCM_PROMPT_HANDLER): Remove, it was unused.
(SCM_PROMPT_DYNWINDS): Rename from SCM_PROMPT_DYNENV.
* libguile/control.c: (scm_c_make_prompt): Take another arg, the winds
that are to be in place for the prompt. Fix allocation to be 4 words
instead of 5 (the handler was never used).
* libguile/eval.c (eval):
* libguile/throw.c (pre_init_catch): Adapt to scm_c_make_prompt change.
* libguile/vm-i-system.c (partial-cont-call): Grovel the new elements of
the wind list in order to call setjmp() on the new prompts. Pass
cookie to vm_reinstate_partial_continuation.
(prompt): Adapt to scm_c_make_prompt change.
* libguile/vm.c (vm_reinstate_partial_continuation): Take a cookie arg,
used when winding captured prompts onto the stack. Winding a prompt
implies making a new prompt, actually -- with new registers, a new
jump buffer, new winds, etc.
* test-suite/tests/control.test ("rewinding prompts"): Add a test for
rewinding prompts.
* test-suite/tests/control.test ("suspend/resume with fluids"):
("restarting partial continuations"):
("reified continuations", "escape-only continuations"): More tests.
eval.scm's handling of with-fluids doesn't leave the VM
* module/ice-9/eval.scm (primitive-eval): Implement with-fluids in terms
of with-fluids, to avoid recursively calling the VM via with-fluids*.
