//This function is equal to mspace_free
//replacing PREACTION with 0 and POSTACTION with nothing
static void mspace_free_lockless(mspace msp, void* mem)
{
if (mem != 0) {
mchunkptr p = mem2chunk(mem);
#if FOOTERS
mstate fm = get_mstate_for(p);
msp = msp; /* placate people compiling -Wunused */
#else /* FOOTERS */
mstate fm = (mstate)msp;
#endif /* FOOTERS */
if (!ok_magic(fm)) {
USAGE_ERROR_ACTION(fm, p);
return;
}
if (!0){//PREACTION(fm)) {
check_inuse_chunk(fm, p);
if (RTCHECK(ok_address(fm, p) && ok_inuse(p))) {
size_t psize = chunksize(p);
mchunkptr next = chunk_plus_offset(p, psize);
s_allocated_memory -= psize;
if (!pinuse(p)) {
size_t prevsize = p->prev_foot;
if (is_mmapped(p)) {
psize += prevsize + MMAP_FOOT_PAD;
if (CALL_MUNMAP((char*)p - prevsize, psize) == 0)
fm->footprint -= psize;
goto postaction;
}
else {
mchunkptr prev = chunk_minus_offset(p, prevsize);
psize += prevsize;
p = prev;
if (RTCHECK(ok_address(fm, prev))) { /* consolidate backward */
if (p != fm->dv) {
unlink_chunk(fm, p, prevsize);
}
else if ((next->head & INUSE_BITS) == INUSE_BITS) {
fm->dvsize = psize;
set_free_with_pinuse(p, psize, next);
goto postaction;
}
}
else
goto erroraction;
}
}
if (RTCHECK(ok_next(p, next) && ok_pinuse(next))) {
if (!cinuse(next)) { /* consolidate forward */
if (next == fm->top) {
size_t tsize = fm->topsize += psize;
fm->top = p;
p->head = tsize | PINUSE_BIT;
if (p == fm->dv) {
fm->dv = 0;
fm->dvsize = 0;
}
if (should_trim(fm, tsize))
sys_trim(fm, 0);
goto postaction;
}
else if (next == fm->dv) {
size_t dsize = fm->dvsize += psize;
fm->dv = p;
set_size_and_pinuse_of_free_chunk(p, dsize);
goto postaction;
}
else {
size_t nsize = chunksize(next);
psize += nsize;
unlink_chunk(fm, next, nsize);
set_size_and_pinuse_of_free_chunk(p, psize);
if (p == fm->dv) {
fm->dvsize = psize;
goto postaction;
}
}
}
else
set_free_with_pinuse(p, psize, next);
if (is_small(psize)) {
insert_small_chunk(fm, p, psize);
check_free_chunk(fm, p);
}
else {
tchunkptr tp = (tchunkptr)p;
insert_large_chunk(fm, tp, psize);
check_free_chunk(fm, p);
if (--fm->release_checks == 0)
release_unused_segments(fm);
}
goto postaction;
}
}
erroraction:
USAGE_ERROR_ACTION(fm, p);
postaction:
;//POSTACTION(fm);
}
}
}
bool MemoryHeap::trim(size_t pad)
{
size_t released = release_unused_segments((mstate)mMspace);
int trimmed = mspace_trim(mMspace, pad);
return released > 0 || trimmed > 0;
}
