Semaphore.cc

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#include "Semaphore.hh"

namespace openmsx {

Semaphore::Semaphore(unsigned value)
        : value(value)
{
}

void Semaphore::up()
{
        std::unique_lock<std::mutex> lock(mutex);
        value++;
        condition.notify_one();
}

void Semaphore::down()
{
        std::unique_lock<std::mutex> lock(mutex);
        condition.wait(lock, [&]() { return value != 0; });
        value--;
}

} // namespace openmsx