Blk allocate(size_t n) {
auto n1 = roundToAligned(n, align);
if ((m_top - m_mem) + n1 > s) {
return {nullptr, 0};
}
Blk r = {m_top, n};
m_top += n1;
return r;
}
AllocatorBlock allocate(size_t n) {
auto n1 = roundToAligned(n);
if (n1 > d_ + s - p_) {
return {nullptr, 0};
}
AllocatorBlock result = {p_, n};
p_ += n1;
return result;
}
void deallocate(Blk blk) {
if ((char *)blk.ptr + roundToAligned(blk.size, align) == m_top) {
m_top = (char *)blk.ptr;
}
}
void deallocate(AllocatorBlock b) {
if ((char*)b.ptr + roundToAligned(b.length) == p_) {
p_ = (char*)b.ptr;
}
}