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/// @file WASM stub for signals.cc
/// In the WASM evaluator there are no POSIX signals, no threads, and no
/// Ctrl-C interruption. All interrupt machinery is replaced with no-ops.

#include "lix/libutil/signals.hh"
#include "lix/libutil/error.hh"

#include <atomic>
#include <functional>
#include <memory>

namespace nix {

std::atomic_unsigned_lock_free _interruptSequence{0};
thread_local std::atomic_unsigned_lock_free::value_type threadInterruptSeq{0};
thread_local std::function<bool()> interruptCheck;

Interrupted makeInterrupted()
{
    return Interrupted("interrupted by the user");
}

bool isInterrupted()
{
    return false;
}

void _interrupted() {}

void unsetUserInterruptRequest() {}

void triggerInterrupt() {}

void saveSignalMask() {}

void startSignalHandlerThread() {}

void restoreSignals() {}

std::unique_ptr<InterruptCallback> createInterruptCallback(std::function<void()>)
{
    // Return a no-op callback handle.
    struct NoopCallback : InterruptCallback
    {};
    return std::make_unique<NoopCallback>();
}

} // namespace nix