rune 0.14.2

The Rune Language, an embeddable dynamic programming language for Rust.
Documentation 
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// In no-std environments, the implementor must define these functions.
//
// Normally these make use of thread-local storage, but if you want them to be
// completed disabled simply return dummy values or store it in static storage
// (if singlethreaded).
extern "C" {
    /// Get the current budget for the current thread.
    pub(super) fn __rune_budget_get() -> usize;

    /// Replace the current budget for the current thread and return the one
    /// which was previously set.
    pub(super) fn __rune_budget_replace(value: usize) -> usize;
}

pub(super) fn rune_budget_get() -> usize {
    // SAFETY: implementor is expected to have read the documentation and
    // implemented this correctly.
    unsafe { __rune_budget_get() }
}

pub(super) fn rune_budget_replace(value: usize) -> usize {
    // SAFETY: implementor is expected to have read the documentation and
    // implemented this correctly.
    unsafe { __rune_budget_replace(value) }
}