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* gc.c (scm_protect_object): Avoid looking up the object handle

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twice.
(scm_unprotect_object): Abort if scm_unprotect_object is called on
an unprotected object.
This commit is contained in:
Mikael Djurfeldt 2000-06-14 15:00:52 +00:00
parent 2dd6a83aed
commit 0f0f08998d
1 changed files with 14 additions and 13 deletions
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27
libguile/gc.c
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@ -2145,12 +2145,8 @@ scm_protect_object (SCM obj)
/* This critical section barrier will be replaced by a mutex. */
SCM_REDEFER_INTS;
handle = scm_hashq_get_handle (scm_protects, obj);
if (SCM_IMP (handle))
scm_hashq_create_handle_x (scm_protects, obj, SCM_MAKINUM (1));
else
SCM_SETCDR (handle, SCM_MAKINUM (SCM_INUM (SCM_CDR (handle)) + 1));
handle = scm_hashq_create_handle_x (scm_protects, obj, SCM_MAKINUM (0));
SCM_SETCDR (handle, SCM_MAKINUM (SCM_INUM (SCM_CDR (handle)) + 1));
SCM_REALLOW_INTS;
@ -2171,15 +2167,20 @@ scm_unprotect_object (SCM obj)
SCM_REDEFER_INTS;
handle = scm_hashq_get_handle (scm_protects, obj);
if (SCM_NIMP (handle))
if (SCM_IMP (handle))
{
int count = SCM_INUM (SCM_CDR (handle)) - 1;
if (count <= 0)
scm_hashq_remove_x (scm_protects, obj);
else
SCM_SETCDR (handle, SCM_MAKINUM (count));
fprintf (stderr, "scm_unprotect_object called on unprotected object\n");
abort ();
}
{
int count = SCM_INUM (SCM_CDR (handle)) - 1;
if (count <= 0)
scm_hashq_remove_x (scm_protects, obj);
else
SCM_SETCDR (handle, SCM_MAKINUM (count));
}
SCM_REALLOW_INTS;