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* tests/gpgscm/scheme-private.h (struct scheme): New fields
'inhibit_gc', 'reserved_cells', and 'reserved_lineno'.
* tests/gpgscm/scheme.c (GC_ENABLED): New macro.
(USE_GC_LOCKING): Likewise.
(gc_reservations): Likewise.
(gc_reservation_failure): New function.
(_gc_disable): Likewise.
(gc_disable): New macro.
(gc_enable): Likewise.
(gc_enabled): Likewise.
(gc_consume): Likewise.
(get_cell_x): Consume reserved cell if garbage collection is disabled.
(_get_cell): Assert that gc is enabled.
(get_cell): Only record cell in the list of recently allocated cells
if gc is enabled.
(get_vector_object): Likewise.
(gc): Assert that gc is enabled.
(s_return): Add comment, adjust call to '_s_return'.
(s_return_enable_gc): New macro.
(_s_return): Add flag 'enable_gc' and re-enable gc if set.
(oblist_add_by_name): Use the new facilities to protect the
allocations.
(new_frame_in_env): Likewise.
(new_slot_spec_in_env): Likewise.
(s_save): Likewise.
(opexe_0): Likewise.
(opexe_1): Likewise.
(opexe_2): Likewise.
(opexe_5): Likewise.
(opexe_6): Likewise.
(scheme_init_custom_alloc): Initialize the new fields.
--
Every time a cell is allocated, the interpreter may run out of free
cells and do a garbage collection. This is problematic because it
might garbage collect objects that have been allocated, but are not
yet made available to the interpreter.
Previously, we would plug such newly allocated cells into the list of
newly allocated objects rooted at car(sc->sink), but that requires
allocating yet another cell increasing pressure on the memory
management system.
A faster alternative is to preallocate the cells needed for an
operation and make sure the garbage collection is not run until all
allocated objects are plugged in. This can be done with gc_disable
and gc_enable.
This optimization can be applied incrementally. This commit picks all
low-hanging fruits.
Signed-off-by: Justus Winter <[email protected]>
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* tests/gpgscm/scheme-private.h (struct scheme): Make field
'COMPILE_HOOK' optional.
* tests/gpgscm/scheme.c (opexe_0): Fix guard.
(scheme_init_custom_alloc): Conditionally initialize 'COMPILE_HOOK'.
* tests/gpgscm/scheme.h (USE_COMPILE_HOOK): Define to 1 by default.
Signed-off-by: Justus Winter <[email protected]>
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* tests/gpgscm/scheme-private.h (struct scheme): Remove related fields.
* tests/gpgscm/scheme.c: Drop all !USE_SCHEME_STACK code.
* tests/gpgscm/scheme.h (USE_SCHEME_STACK): Remove macro.
Signed-off-by: Justus Winter <[email protected]>
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* tests/gpgscm/scheme-private.h (struct scheme): Use (void *) for
alloc_seg.
* tests/gpgscm/scheme.c (alloc_cellseg): Use (void *) for cp. Use
(void *) for coercion of address calculation.
--
In old C language, (char *) means an address. In modern C, it's
specifically an address with alignment=1. It's good to use (void *) for
an address, because newer compiler emits warnings. Note: in this
particular case, it is just a warning and the code is safe against
invalid alignment, though.
Signed-off-by: NIIBE Yutaka <[email protected]>
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* tests/gpgscm/scheme-private.h (struct cell): Add 'foreign_object'.
(is_foreign_object): New prototype.
(get_foreign_object_{vtable,data}): Likewise.
* tests/gpgscm/scheme.c (enum scheme_types): New type.
(is_foreign_object): New function.
(get_foreign_object_{vtable,data}): Likewise.
(mk_foreign_object): Likewise.
(finalize_cell): Free foreign objects.
(atom2str): Pretty-print foreign objects.
(vtbl): Add new functions.
* tests/gpgscm/scheme.h (struct foreign_object_vtable): New type.
(mk_foreign_object): New prototype.
(struct scheme_interface): Add new functions.
Patch from Thomas Munro,
https://sourceforge.net/p/tinyscheme/patches/13/
Signed-off-by: Justus Winter <[email protected]>
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* tests/gpgscm/scheme-config.h (strbuff{,_size}): Make buffer dynamic.
* tests/gpgscm/scheme.c (expand_strbuff): New function.
(putcharacter): Adapt length test.
(readstrexp): Expand buffer if necessary.
(scheme_init_custom_alloc): Initialize buffer.
(scheme_deinit): Free buffer.
Patch from Thomas Munro,
https://sourceforge.net/p/tinyscheme/patches/11/
Signed-off-by: Justus Winter <[email protected]>
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Revision 110 from svn://svn.code.sf.net/p/tinyscheme/code/trunk
* tests/gpgscm/COPYING: New file.
* tests/gpgscm/Manual.txt: Likewise.
* tests/gpgscm/init.scm: Likewise.
* tests/gpgscm/opdefines.h: Likewise.
* tests/gpgscm/scheme-private.h: Likewise.
* tests/gpgscm/scheme.c: Likewise.
* tests/gpgscm/scheme.h: Likewise.
Signed-off-by: Justus Winter <[email protected]>
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