C++ (Cpp) ProcessId::incSuspendedCounter示例

int32_t OSSim::eventSuspend(Pid_t cpid, Pid_t pid)
{
    LOG("OSSim::suspend(%d) Received from pid %d",pid,cpid);
    ProcessId *proc = ProcessId::getProcessId(pid);
    if( proc == 0 ) {
        LOG("OSSim::suspend(%d) non existing process???", pid);
        return 0;
    }
    // Increment the suspend counter
    proc->incSuspendedCounter();
    // Check if process already suspended
    if(proc->getState()==SuspendedState) {
        I(0);
        LOG("OSSim::suspend(%d) already suspended (recursive=%d)"
            , pid, proc->getSuspendedCounter());
        return 0;
    }
    // The process should be ready or running
    I((proc->getState()==ReadyState)||(proc->getState()==RunningState));
    // Need to suspend only if suspended counter is positive
    if(proc->getSuspendedCounter()>0) {
        // The process is no longer runnable
        cpus.makeNonRunnable(proc);
        // Set the state to SuspendedState
        proc->setState(SuspendedState);
    } else {
        I(0);
        LOG("OSSim::suspend(%d,%d) OOO suspend/resume (%d)", cpid, pid, proc->getSuspendedCounter());
    }
    return 1;
}