Skip to content

Add Reserve() to AutoProbing #37

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Draft
jelmervdl wants to merge 2 commits into
base: master
Choose a base branch
from
Draft

Add Reserve() to AutoProbing #37

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
a72f175
Add `Reserve()` method to `AutoProbing`
jelmervdl Jul 3, 2023
c7f1199
Make `AutoProbing` move-assignable
jelmervdl Jul 3, 2023
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
8 changes: 8 additions & 0 deletions util/mmap.hh
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -82,6 +82,14 @@ class scoped_memory {
: data_(from.data_), size_(from.size_), source_(from.source_) {
from.steal();
}

scoped_memory &operator=(scoped_memory &&from) noexcept {
reset();
size_ = from.size_;
source_ = from.source_;
data_ = from.steal();
return *this;
}
#endif

~scoped_memory() { reset(); }
Expand Down
9 changes: 9 additions & 0 deletions util/probing_hash_table.hh
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -393,10 +393,19 @@ template <class EntryT, class HashT, class EqualT = std::equal_to<typename Entry
return backend_.RawEnd();
}

void Reserve(size_t capacity) {
while (threshold_ < capacity)
Double();
}

private:
void DoubleIfNeeded() {
if (UTIL_LIKELY(Size() < threshold_))
return;
Double();
}

void Double() {
HugeRealloc(backend_.DoubleTo(), KeyIsRawZero(backend_.invalid_), mem_);
allocated_ = backend_.DoubleTo();
backend_.Double(mem_.get(), !KeyIsRawZero(backend_.invalid_));
Expand Down