std::runtime::posix::atomic

std::runtime::posix::atomic is the hosted POSIX implementation module for std::runtime::atomic.

This module is implementation-facing and should not be imported directly by ordinary user code.

Behavior#

The module exposes ext declarations for runtime symbols implemented in src/silk_rt_atomic.c, then re-exports narrow wrappers for std::runtime::atomic.

The runtime symbols use native compiler atomic builtins for:

• u64 load/store,
• u64 swap,
• u64 fetch-add/fetch-sub,
• u64 compare-exchange,
• thread fences.

Invalid memory-order combinations are a checker error at the public std::atomic layer. Runtime helpers still sanitize invalid load/store/failure orders to a conservative sequentially consistent operation so malformed low-level direct calls do not lower to ordinary non-atomic memory access.