allocating heap. The basic idea is to trigger GC every Nth
allocated cell and grow heap when free list runs out. The scheme
has been extended so that GC isn't triggered until all remaining
cells are used. The implementation is also prepared for
development in the direction of POSIX threads.
* gc.c (SCM_EXPHEAP): In order to grow by a factor of 1.5,
SCM_EXPHEAP should return half of the heap size.
configured with --enable-guile-debug.
* init.c (scm_i_getenv_int): New function.
(scm_boot_guile_1): Use the environment variables
GUILE_INIT_HEAP_SIZE, GUILE_INIT_HEAP_SIZE2 to select heap size if
they exist. (This may be replaced by a Scheme level mechanism in
the future.)
1-word and 2-word segments. Having the smaller size causes Guile
to GC too often. Obviously something needs to be done to allow
for a smaller 2-word segment without this to happen. (The amount
of heap for each type should be automatically adapted to the
application somehow.)
all of Guile basics fits into one segment and there suitable room
for work.
(SCM_EXPHEAP): Now takes an argument. Grow by a factor of 1.5
instead of 2.
(scm_freelist, scm_freelist2): Now of type scm_freelist_t.
Freelists now contains information about object span, cells
collected and amount of cells in heap segments belonging to the
list.
(scm_heap_size, scm_gc_cells_collected): Removed.
numbers.h, objects.c, ramap.c, random.c, unif.c, unif.h: Extensive
rewrite of handling of real and complex numbers.
(SCM_FLOATS, SCM_SINGLES): These #ifdef conditionals have been
removed along with the support for floats. (Float vectors are
still supported.)
numbers.h, objects.c, ramap.c, random.c, unif.c, unif.h: Extensive
rewrite of handling of real and complex numbers.
(SCM_FLOATS, SCM_SINGLES): These #ifdef conditionals have been
removed along with the support for floats. (Float vectors are
still supported.)
* unif.c (scm_makflo): Removed.
(scm_tc16_bigpos, scm_tc16_bigneg): Replaced by scm_tc16_big.
Use SCM_BIGSIGN(x) to test for sign!
(scm_tc16_big): The new bignum type.
(SCM_REAL_PART, SCM_IMAG_PART): Removed.
numbers.h, objects.c, ramap.c, random.c, unif.c, unif.h: Extensive
rewrite of handling of real and complex numbers.
(SCM_FLOATS, SCM_SINGLES): These #ifdef conditionals have been
removed along with the support for floats. (Float vectors are
still supported.)
* numbers.h (SCM_BIGSIGN): Sign moved to bit 16.
(scm_makdbl): Deprecated.
(SCM_NEWREAL, SCM_NEWCOMPLEX): New macros.
(SCM_SINGP): Deprecated.
(SCM_FLO): Removed.
(SCM_INEXP, SCM_CPLXP): Deprecated.
(SCM_INEXACTP, SCM_COMPLEXP): New macros.
(SCM_COMPLEX_REAL, SCM_COMPLEX_IMAG): Renamed from
SCM_REAL, SCM_IMAG (and now only valid for complex numbers).
(SCM_REAL, SCM_IMAG): New, *deprecated*, selectors which work both
for doubles and complex numbers.
(SCM_REAL_VALUE): New selector for doubles.
(scm_double_t, scm_complex_t): New types.
(scm_dbl): Removed.
* numbers.h (struct scm_dbl): changed to represent a double cell,
with the number in the second half.
(struct scm_cplx): new, represents a complex number as a triple
cell.
numbers.h, objects.c, ramap.c, random.c, unif.c, unif.h: Extensive
rewrite of handling of real and complex numbers.
(SCM_FLOATS, SCM_SINGLES): These #ifdef conditionals have been
removed along with the support for floats. (Float vectors are
still supported.)
* numbers.c (scm_floprint, scm_floequal): Removed.
(scm_print_real, scm_print_complex, scm_real_equalp,
scm_complex_equalp): New functions.
* numbers.c (scm_makdbl): no malloc'ing needed, so the
{DEFER,ALLOW}_INTS thing removed.
numbers.h, objects.c, ramap.c, random.c, unif.c, unif.h: Extensive
rewrite of handling of real and complex numbers.
(SCM_FLOATS, SCM_SINGLES): These #ifdef conditionals have been
removed along with the support for floats. (Float vectors are
still supported.)
* gc.c (scm_freelist2): multi-cell freelists.
(inner_map_free_list): map_free_list, parameterized on ncells.
"nn cells in segment mm" was misleading for ncells > 1; changed to
"objects". still print cells too, though.
(scm_map_free_list): rewritten using inner_map_free_list.
(scm_check_freelist): get freelist as parameter, since now we have
more than one.
(scm_debug_newcell2): multi-cell variants of
scm_debug_newcell.
(scm_gc_for_newcell): take ncells and freelist pointer as
parameters.
(scm_gc_mark): add case for tc7_pws (procedures with setters are
now double cells).
(scm_gc_sweep): don't free the float data, since it's not malloced
anymore.
(init_heap_seg): didn't understand what n_new_objects stood for,
so changed to n_new_cells.
(make_initial_segment): new function, makes an initial segment
according to given ncells.
(scm_init_storage): call make_initial_segment, for ncells={1,2,3}.
(end_input_void_port): renamed to end_input_default.
* init.c (scm_standard_stream_to_port): create a void port instead
of opening /dev/null if the standard file descriptors are bad.
advantages: no portability problems, doesn't waste a file descriptor,
simplifies the code (thanks to Marius for the idea).
* vports.c (s_scm_make_soft_port): call scm_port_non_buffer.
* void ports: make reading from a void port give EOF instead of
segv:
* ports.c (s_scm_sys_make_void_port): modified docstring.
(fill_input_void_port): new proc.
(scm_init_ports): set up fill_input_void_port.
* ports.c (scm_port_non_buffer): new proc.
(scm_void_port): call scm_port_non_buffer.
* fports.c (scm_setvbuf): docstring: remove the fcntl documentation
which was incorrectly appended.
