Method new_arena

src/support/lockedpool.cpp:348–375

}

bool LockedPool::new_arena(size_t size, size_t align)
{
    bool locked;
    // If this is the first arena, handle this specially: Cap the upper size
    // by the process limit. This makes sure that the first arena will at least
    // be locked. An exception to this is if the process limit is 0:
    // in this case no memory can be locked at all so we'll skip past this logic.
    if (arenas.empty()) {
        size_t limit = allocator->GetLimit();
        if (limit > 0) {
            size = std::min(size, limit);
        }
    }
    void *addr = allocator->AllocateLocked(size, &locked);
    if (!addr) {
        return false;
    }
    if (locked) {
        cumulative_bytes_locked += size;
    } else if (lf_cb) { // Call the locking-failed callback if locking failed
        if (!lf_cb()) { // If the callback returns false, free the memory and fail, otherwise consider the user warned and proceed.
            allocator->FreeLocked(addr, size);
            return false;
        }
    }
    arenas.emplace_back(allocator.get(), addr, size, align);
    return true;
}

LockedPool::LockedPageArena::LockedPageArena(LockedPageAllocator *allocator_in, void *base_in, size_t size_in, size_t align_in):
    Arena(base_in, size_in, align_in), base(base_in), size(size_in), allocator(allocator_in)