-#define STACK_SIZE (1024 * 1024)
-
-static void *stack_allocate(size_t size)
-{
- return malloc(size);
-}
-
-static void stack_free(void *stack)
-{
- free(stack);
-}
-
-Thread *thread_current(void)
-{
- return model->scheduler->get_current_thread();
-}
-
-int Thread::create_context()
-{
- int ret;
-
- ret = getcontext(&context);
- if (ret)
- return ret;
-
- /* start_routine == NULL means this is our initial context */
- if (!start_routine)
- return 0;
-
- /* Initialize new managed context */
- stack = stack_allocate(STACK_SIZE);
- context.uc_stack.ss_sp = stack;
- context.uc_stack.ss_size = STACK_SIZE;
- context.uc_stack.ss_flags = 0;
- context.uc_link = &model->system_thread->context;
- makecontext(&context, start_routine, 1, arg);
-
- return 0;
-}
-
-int Thread::swap(Thread *t)
-{
- return swapcontext(&this->context, &t->context);
-}
-
-void Thread::dispose()
-{
- DEBUG("completed thread %d\n", thread_current()->get_id());
- state = THREAD_COMPLETED;
- stack_free(stack);
-}
-
-/*
- * Return 1 if found next thread, 0 otherwise
- */
-static int thread_system_next(void)
-{
- Thread *curr, *next;
-
- curr = thread_current();
- model->check_current_action();
- if (curr) {
- if (curr->get_state() == THREAD_READY)
- model->scheduler->add_thread(curr);
- else if (curr->get_state() == THREAD_RUNNING)
- /* Stopped while running; i.e., completed */
- curr->dispose();
- else
- DEBUG("ERROR: current thread in unexpected state??\n");
- }
- next = model->scheduler->next_thread();
- if (next)
- next->set_state(THREAD_RUNNING);
- DEBUG("(%d, %d)\n", curr ? curr->get_id() : -1, next ? next->get_id() : -1);
- if (!next)
- return 1;
- return model->system_thread->swap(next);
-}
-
-static void thread_wait_finish(void)
-{
-
- DBG();
-
- while (!thread_system_next());
-}
-
-int Thread::switch_to_master(ModelAction *act)
-{
- Thread *next;
-
- DBG();
- model->set_current_action(act);
- state = THREAD_READY;
- next = model->system_thread;
- return swap(next);
-}
-
-Thread::Thread(thrd_t *t, void (*func)(), void *a) {
- int ret;
-
- user_thread = t;
- start_routine = func;
- arg = a;
-
- /* Initialize state */
- ret = create_context();
- if (ret)
- printf("Error in create_context\n");
-
- state = THREAD_CREATED;
- model->assign_id(this);
- model->scheduler->add_thread(this);
-}
-
-Thread::Thread(thrd_t *t) {
- /* system thread */
- user_thread = t;
- state = THREAD_CREATED;
- model->assign_id(this);
- create_context();
- model->add_system_thread(this);
-}
-
-static thread_id_t thrd_to_id(thrd_t t)
-{
- return t;
-}
-
-thread_id_t Thread::get_id()
-{
- return thrd_to_id(*user_thread);
-}
-