Function sys_mutex_unlock

kernel/cellos/src/sys_mutex.cpp:300–338

}

error_code sys_mutex_unlock(ppu_thread &ppu, u32 mutex_id) {
  ppu.state += cpu_flag::wait;

  sys_mutex.trace("sys_mutex_unlock(mutex_id=0x%x)", mutex_id);

  const auto mutex = idm::check<lv2_obj, lv2_mutex>(
      mutex_id,
      [&, notify = lv2_obj::notify_all_t()](lv2_mutex &mutex) -> CellError {
        auto result = mutex.try_unlock(ppu);

        if (result == CELL_EBUSY) {
          std::lock_guard lock(mutex.mutex);

          if (auto cpu = mutex.reown<ppu_thread>()) {
            if (cpu->state & cpu_flag::again) {
              ppu.state += cpu_flag::again;
              return {};
            }

            mutex.awake(cpu);
          }

          result = {};
        }

        notify.cleanup();
        return result;
      });

  if (!mutex) {
    return CELL_ESRCH;
  }

  if (mutex.ret) {
    return mutex.ret;
  }

  return CELL_OK;
}