DUK_INTERNAL void duk_heaphdr_incref(duk_heaphdr *h) {
DUK_ASSERT(h != NULL);
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h));
DUK_ASSERT_DISABLE(DUK_HEAPHDR_GET_REFCOUNT(h) >= 0);
DUK_HEAPHDR_PREINC_REFCOUNT(h);
}
/*
* Buffers have no internal references. However, a dynamic
* buffer has a separate allocation for the buffer. This is
* freed by duk_heap_free_heaphdr_raw().
*/
duk_heap_remove_any_from_heap_allocated(heap, h);
duk_heap_free_heaphdr_raw(heap, h);
break;
default:
DUK_D(DUK_DPRINT("invalid heap type in decref: %ld", (long) DUK_HEAPHDR_GET_TYPE(h)));
DUK_UNREACHABLE();
}
}
#if !defined(DUK_USE_FAST_REFCOUNT_DEFAULT)
DUK_INTERNAL void duk_tval_incref(duk_tval *tv) {
DUK_ASSERT(tv != NULL);
if (DUK_TVAL_IS_HEAP_ALLOCATED(tv)) {
duk_heaphdr *h = DUK_TVAL_GET_HEAPHDR(tv);
DUK_ASSERT(h != NULL);
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h));
DUK_ASSERT_DISABLE(h->h_refcount >= 0);
DUK_HEAPHDR_PREINC_REFCOUNT(h);
}
}
#endif
#if 0 /* unused */
DUK_INTERNAL void duk_tval_incref_allownull(duk_tval *tv) {
if (tv == NULL) {
return;
}
if (DUK_TVAL_IS_HEAP_ALLOCATED(tv)) {
duk_heaphdr *h = DUK_TVAL_GET_HEAPHDR(tv);
DUK_ASSERT(h != NULL);
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h));
DUK_ASSERT_DISABLE(h->h_refcount >= 0);
DUK_HEAPHDR_PREINC_REFCOUNT(h);
}
}
#endif
DUK_INTERNAL void duk_tval_decref(duk_hthread *thr, duk_tval *tv) {
DUK_ASSERT(thr != NULL);
DUK_ASSERT(tv != NULL);
if (DUK_TVAL_IS_HEAP_ALLOCATED(tv)) {
duk_heaphdr *h = DUK_TVAL_GET_HEAPHDR(tv);
DUK_ASSERT(h != NULL);
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h));
duk_heaphdr_decref(thr, h);
}
}
#if 0 /* unused */
DUK_INTERNAL void duk_tval_decref_allownull(duk_hthread *thr, duk_tval *tv) {
DUK_ASSERT(thr != NULL);
if (tv == NULL) {
return;
}
if (DUK_TVAL_IS_HEAP_ALLOCATED(tv)) {
duk_heaphdr *h = DUK_TVAL_GET_HEAPHDR(tv);
DUK_ASSERT(h != NULL);
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h));
duk_heaphdr_decref(thr, h);
}
}
#endif
#if !defined(DUK_USE_FAST_REFCOUNT_DEFAULT)
DUK_INTERNAL void duk_heaphdr_incref(duk_heaphdr *h) {
DUK_ASSERT(h != NULL);
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h));
DUK_ASSERT_DISABLE(DUK_HEAPHDR_GET_REFCOUNT(h) >= 0);
DUK_HEAPHDR_PREINC_REFCOUNT(h);
}
#endif
#if 0 /* unused */
DUK_INTERNAL void duk_heaphdr_incref_allownull(duk_heaphdr *h) {
if (h == NULL) {
return;
}
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h));
DUK_ASSERT_DISABLE(DUK_HEAPHDR_GET_REFCOUNT(h) >= 0);
DUK_HEAPHDR_PREINC_REFCOUNT(h);
}
DUK_INTERNAL void duk_tval_decref(duk_hthread *thr, duk_tval *tv) {
DUK_ASSERT(thr != NULL);
DUK_ASSERT(tv != NULL);
if (DUK_TVAL_IS_HEAP_ALLOCATED(tv)) {
duk_heaphdr *h = DUK_TVAL_GET_HEAPHDR(tv);
DUK_ASSERT(h != NULL);
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h));
duk_heaphdr_decref(thr, h);
}
}
DUK_INTERNAL void duk_tval_incref(duk_tval *tv) {
DUK_ASSERT(tv != NULL);
if (DUK_TVAL_IS_HEAP_ALLOCATED(tv)) {
duk_heaphdr *h = DUK_TVAL_GET_HEAPHDR(tv);
DUK_ASSERT(h != NULL);
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h));
DUK_ASSERT_DISABLE(h->h_refcount >= 0);
DUK_HEAPHDR_PREINC_REFCOUNT(h);
}
}
DUK_INTERNAL void duk_tval_decref(duk_hthread *thr, duk_tval *tv) {
DUK_ASSERT(thr != NULL);
DUK_ASSERT(tv != NULL);
if (DUK_TVAL_NEEDS_REFCOUNT_UPDATE(tv)) {
duk_heaphdr *h = DUK_TVAL_GET_HEAPHDR(tv);
DUK_ASSERT(h != NULL);
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h));
duk_heaphdr_decref(thr, h);
}
}
DUK_INTERNAL void duk_heaphdr_decref(duk_hthread *thr, duk_heaphdr *h) {
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
DUK_ASSERT(h != NULL);
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h));
DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT(h) >= 1);
if (DUK_HEAPHDR_PREDEC_REFCOUNT(h) != 0) {
return;
}
duk_heaphdr_refzero(thr, h);
}
/*
* Buffers have no internal references. However, a dynamic
* buffer has a separate allocation for the buffer. This is
* freed by duk_heap_free_heaphdr_raw().
*/
duk_heap_remove_any_from_heap_allocated(heap, h);
duk_heap_free_heaphdr_raw(heap, h);
break;
default:
DUK_D(DUK_DPRINT("invalid heap type in decref: %ld", (long) DUK_HEAPHDR_GET_TYPE(h)));
DUK_UNREACHABLE();
}
}
#if !defined(DUK_USE_FAST_REFCOUNT_DEFAULT)
DUK_INTERNAL void duk_tval_incref(duk_tval *tv) {
DUK_ASSERT(tv != NULL);
if (DUK_TVAL_NEEDS_REFCOUNT_UPDATE(tv)) {
duk_heaphdr *h = DUK_TVAL_GET_HEAPHDR(tv);
DUK_ASSERT(h != NULL);
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h));
DUK_ASSERT_DISABLE(h->h_refcount >= 0);
DUK_HEAPHDR_PREINC_REFCOUNT(h);
}
}
#endif
#if 0 /* unused */
DUK_INTERNAL void duk_tval_incref_allownull(duk_tval *tv) {
if (tv == NULL) {
return;
}
if (DUK_TVAL_NEEDS_REFCOUNT_UPDATE(tv)) {
duk_heaphdr *h = DUK_TVAL_GET_HEAPHDR(tv);
DUK_ASSERT(h != NULL);
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h));
DUK_ASSERT_DISABLE(h->h_refcount >= 0);
DUK_HEAPHDR_PREINC_REFCOUNT(h);
}
}
void duk_heap_heaphdr_incref(duk_heaphdr *h) {
#if 0
DUK_DDD(DUK_DDDPRINT("heaphdr incref %p (%ld->%ld): %!O",
(void *) h,
(h != NULL ? (long) h->h_refcount : (long) 0),
(h != NULL ? (long) (h->h_refcount + 1) : (long) 0),
(duk_heaphdr *) h));
#endif
if (!h) {
return;
}
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h));
DUK_ASSERT_DISABLE(h->h_refcount >= 0);
h->h_refcount++;
}
DUK_INTERNAL void duk_heaphdr_decref(duk_hthread *thr, duk_heaphdr *h) {
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
DUK_ASSERT(h != NULL);
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h));
DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT(h) >= 1);
#if defined(DUK_USE_ROM_OBJECTS)
if (DUK_HEAPHDR_HAS_READONLY(h)) {
return;
}
#endif
if (DUK_HEAPHDR_PREDEC_REFCOUNT(h) != 0) {
return;
}
duk_heaphdr_refzero(thr, h);
}
void duk_heap_tval_incref(duk_tval *tv) {
#if 0
DUK_DDD(DUK_DDDPRINT("tval incref %p (%ld->%ld): %!T",
(void *) tv,
(tv != NULL && DUK_TVAL_IS_HEAP_ALLOCATED(tv) ? (long) DUK_TVAL_GET_HEAPHDR(tv)->h_refcount : (long) 0),
(tv != NULL && DUK_TVAL_IS_HEAP_ALLOCATED(tv) ? (long) (DUK_TVAL_GET_HEAPHDR(tv)->h_refcount + 1) : (long) 0),
(duk_tval *) tv));
#endif
if (!tv) {
return;
}
if (DUK_TVAL_IS_HEAP_ALLOCATED(tv)) {
duk_heaphdr *h = DUK_TVAL_GET_HEAPHDR(tv);
if (h) {
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h));
DUK_ASSERT_DISABLE(h->h_refcount >= 0);
h->h_refcount++;
}
}
}
void duk_heap_heaphdr_decref(duk_hthread *thr, duk_heaphdr *h) {
duk_heap *heap;
#if 0
DUK_DDD(DUK_DDDPRINT("heaphdr decref %p (%ld->%ld): %!O",
(void *) h,
(h != NULL ? (long) h->h_refcount : (long) 0),
(h != NULL ? (long) (h->h_refcount - 1) : (long) 0),
(duk_heaphdr *) h));
#endif
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
if (!h) {
return;
}
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h));
DUK_ASSERT(h->h_refcount >= 1);
if (--h->h_refcount != 0) {
return;
}
heap = thr->heap;
DUK_DDD(DUK_DDDPRINT("refzero %p: %!O", (void *) h, (duk_heaphdr *) h));
#ifdef DUK_USE_MARK_AND_SWEEP
/*
* If mark-and-sweep is running, don't process 'refzero' situations at all.
* They may happen because mark-and-sweep needs to finalize refcounts for
* each object it sweeps. Otherwise the target objects of swept objects
* would have incorrect refcounts.
*
* Note: mark-and-sweep could use a separate decref handler to avoid coming
* here at all. However, mark-and-sweep may also call finalizers, which
* can do arbitrary operations and would use this decref variant anyway.
*/
if (DUK_HEAP_HAS_MARKANDSWEEP_RUNNING(heap)) {
DUK_DDD(DUK_DDDPRINT("refzero handling suppressed when mark-and-sweep running, object: %p", (void *) h));
return;
}
#endif
switch ((duk_small_int_t) DUK_HEAPHDR_GET_TYPE(h)) {
case DUK_HTYPE_STRING:
/*
* Strings have no internal references but do have "weak"
* references in the string cache. Also note that strings
* are not on the heap_allocated list like other heap
* elements.
*/
duk_heap_strcache_string_remove(heap, (duk_hstring *) h);
duk_heap_string_remove(heap, (duk_hstring *) h);
duk_heap_free_heaphdr_raw(heap, h);
break;
case DUK_HTYPE_OBJECT:
/*
* Objects have internal references. Must finalize through
* the "refzero" work list.
*/
duk_heap_remove_any_from_heap_allocated(heap, h);
duk__queue_refzero(heap, h);
duk__refzero_free_pending(thr);
break;
case DUK_HTYPE_BUFFER:
/*
* Buffers have no internal references. However, a dynamic
* buffer has a separate allocation for the buffer. This is
* freed by duk_heap_free_heaphdr_raw().
*/
duk_heap_remove_any_from_heap_allocated(heap, h);
duk_heap_free_heaphdr_raw(heap, h);
break;
default:
DUK_D(DUK_DPRINT("invalid heap type in decref: %ld", (long) DUK_HEAPHDR_GET_TYPE(h)));
DUK_UNREACHABLE();
}
}
DUK_INTERNAL void duk_heaphdr_refzero(duk_hthread *thr, duk_heaphdr *h) {
duk_heap *heap;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(h != NULL);
heap = thr->heap;
DUK_DDD(DUK_DDDPRINT("refzero %p: %!O", (void *) h, (duk_heaphdr *) h));
/*
* Refzero handling is skipped entirely if (1) mark-and-sweep is
* running or (2) execution is paused in the debugger. The objects
* are left in the heap, and will be freed by mark-and-sweep or
* eventual heap destruction.
*
* This is necessary during mark-and-sweep because refcounts are also
* updated during the sweep phase (otherwise objects referenced by a
* swept object would have incorrect refcounts) which then calls here.
* This could be avoided by using separate decref macros in
* mark-and-sweep; however, mark-and-sweep also calls finalizers which
* would use the ordinary decref macros anyway and still call this
* function.
*
* This check must be enabled also when mark-and-sweep support has been
* disabled: the flag is also used in heap destruction when running
* finalizers for remaining objects, and the flag prevents objects from
* being moved around in heap linked lists.
*/
/* XXX: ideally this would be just one flag (maybe a derived one) so
* that a single bit test is sufficient to check the condition.
*/
#if defined(DUK_USE_DEBUGGER_SUPPORT)
if (DUK_UNLIKELY(DUK_HEAP_HAS_MARKANDSWEEP_RUNNING(heap) || DUK_HEAP_IS_PAUSED(heap))) {
#else
if (DUK_UNLIKELY(DUK_HEAP_HAS_MARKANDSWEEP_RUNNING(heap))) {
#endif
DUK_DDD(DUK_DDDPRINT("refzero handling suppressed when mark-and-sweep running, object: %p", (void *) h));
return;
}
switch ((duk_small_int_t) DUK_HEAPHDR_GET_TYPE(h)) {
case DUK_HTYPE_STRING:
/*
* Strings have no internal references but do have "weak"
* references in the string cache. Also note that strings
* are not on the heap_allocated list like other heap
* elements.
*/
duk_heap_strcache_string_remove(heap, (duk_hstring *) h);
duk_heap_string_remove(heap, (duk_hstring *) h);
duk_heap_free_heaphdr_raw(heap, h);
break;
case DUK_HTYPE_OBJECT:
/*
* Objects have internal references. Must finalize through
* the "refzero" work list.
*/
duk_heap_remove_any_from_heap_allocated(heap, h);
duk__queue_refzero(heap, h);
duk__refzero_free_pending(thr);
break;
case DUK_HTYPE_BUFFER:
/*
* Buffers have no internal references. However, a dynamic
* buffer has a separate allocation for the buffer. This is
* freed by duk_heap_free_heaphdr_raw().
*/
duk_heap_remove_any_from_heap_allocated(heap, h);
duk_heap_free_heaphdr_raw(heap, h);
break;
default:
DUK_D(DUK_DPRINT("invalid heap type in decref: %ld", (long) DUK_HEAPHDR_GET_TYPE(h)));
DUK_UNREACHABLE();
}
}
#if !defined(DUK_USE_FAST_REFCOUNT_DEFAULT)
DUK_INTERNAL void duk_tval_incref(duk_tval *tv) {
DUK_ASSERT(tv != NULL);
if (DUK_TVAL_NEEDS_REFCOUNT_UPDATE(tv)) {
duk_heaphdr *h = DUK_TVAL_GET_HEAPHDR(tv);
DUK_ASSERT(h != NULL);
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h));
DUK_ASSERT_DISABLE(h->h_refcount >= 0);
DUK_HEAPHDR_PREINC_REFCOUNT(h);
}
}
