C++ reference C reference Reference map

Ranges Algorithms Containers Strings Input/output

Search

Min standard

Theme

Keyboard

Press ? for shortcuts.

Code Ligatures

Pinned

Home / C++ / Header / Semaphore

Standard library header <semaphore> (C++20)

Min standard notice:

This header is part of the thread support library.

Build: 2026-03-03 · Pages: 6276

Keyboard shortcuts

? Open shortcuts
S Open bookmark spotlight
b Toggle bookmark
/ Focus search
Esc Close dialogs/menus
j Scroll down (Vim mode)
k Scroll up (Vim mode)
g g Go to top (Vim mode)
G Go to bottom (Vim mode)

Bookmarks

Enter: open · ↑/↓: move · Backspace/Delete: remove selected when query is empty