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remove GC bits documentation from the tags table.

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This commit is contained in:
Han-Wen Nienhuys 2002-08-05 17:46:34 +00:00
parent 39e8f371e2
commit 33138b0567
4 changed files with 22 additions and 10 deletions
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2
libguile/ChangeLog
View file

@ -1,5 +1,7 @@
2002-08-05 Han-Wen Nienhuys <hanwen@cs.uu.nl>
* tags.h: remove GC bits documentation from the tags table.
* read.c (INPUT_ERROR): Prepare for file:line:column error
messages for errors in scm_lreadr() and friends.

1
libguile/gc-card.c
View file

@ -91,6 +91,7 @@ scm_i_sweep_card (scm_t_cell * p, SCM *free_list, int span)
the bitvec in turn, but it wasn't any faster, but quite bit
hairier.
*/
for (p += offset; p < end; p += span, offset += span)
{
SCM scmptr = PTR2SCM(p);

19
libguile/gc-mark.c
View file

@ -192,7 +192,7 @@ scm_gc_mark (SCM ptr)
Mark the dependencies of an object.
TODO:
Prefetching:
Should prefetch objects before marking, i.e. if marking a cell, we
should prefetch the car, and then mark the cdr. This will improve CPU
@ -204,7 +204,13 @@ garbage collector cache misses.
Prefetch is supported on GCC >= 3.1
*/
(Some time later.)
Tried this with GCC 3.1.1 -- the time differences are barely measurable.
Perhaps this would work better with an explicit markstack?
*/
void
scm_gc_mark_dependencies (SCM p)
#define FUNC_NAME "scm_gc_mark_dependencies"
@ -225,6 +231,8 @@ scm_gc_mark_dependencies (SCM p)
ptr = SCM_CAR (ptr);
goto gc_mark_nimp;
}
scm_gc_mark (SCM_CAR (ptr));
ptr = SCM_CDR (ptr);
goto gc_mark_nimp;
@ -232,6 +240,7 @@ scm_gc_mark_dependencies (SCM p)
ptr = SCM_CDR (ptr);
goto gc_mark_loop;
case scm_tc7_pws:
scm_gc_mark (SCM_SETTER (ptr));
ptr = SCM_PROCEDURE (ptr);
goto gc_mark_loop;
@ -285,8 +294,10 @@ scm_gc_mark_dependencies (SCM p)
if (i == 0)
break;
while (--i > 0)
if (SCM_NIMP (SCM_VELTS (ptr)[i]))
scm_gc_mark (SCM_VELTS (ptr)[i]);
{
if (SCM_NIMP (SCM_VELTS (ptr)[i]))
scm_gc_mark (SCM_VELTS (ptr)[i]);
}
ptr = SCM_VELTS (ptr)[0];
goto gc_mark_loop;
#ifdef CCLO

10
libguile/tags.h
View file

@ -229,12 +229,10 @@ typedef signed long scm_t_signed_bits;
*
* Here is a summary of tags in the CAR of a non-immediate:
*
* HEAP CELL: G=gc_mark; 1 during mark, 0 other times.
*
* cons ..........SCM car..............0 ...........SCM cdr.............G
* struct ..........void * type........001 ...........void * data.........G
* closure ..........SCM code...........011 ...........SCM env.............G
* tc7 ......24.bits of data...Gxxxx1S1 ..........void *data............
* cons ..........SCM car..............0 ...........SCM cdr.............0
* struct ..........void * type........001 ...........void * data.........0
* closure ..........SCM code...........011 ...........SCM env.............0
* tc7 ......24.bits of data...0xxxx1S1 ..........void *data............
*
*
*