1 #include "libthreads.h"
5 /* global "model" object */
8 #define STACK_SIZE (1024 * 1024)
10 static void * stack_allocate(size_t size)
12 return userMalloc(size);
15 static void stack_free(void *stack)
20 Thread * thread_current(void)
22 return model->scheduler->get_current_thread();
25 int Thread::create_context()
29 ret = getcontext(&context);
33 /* Initialize new managed context */
34 stack = stack_allocate(STACK_SIZE);
35 context.uc_stack.ss_sp = stack;
36 context.uc_stack.ss_size = STACK_SIZE;
37 context.uc_stack.ss_flags = 0;
38 context.uc_link = model->get_system_context();
39 makecontext(&context, start_routine, 1, arg);
44 int Thread::swap(Thread *t, ucontext_t *ctxt)
46 return swapcontext(&t->context, ctxt);
49 int Thread::swap(ucontext_t *ctxt, Thread *t)
51 return swapcontext(ctxt, &t->context);
54 void Thread::complete()
56 if (state != THREAD_COMPLETED) {
57 DEBUG("completed thread %d\n", get_id());
58 state = THREAD_COMPLETED;
64 void * Thread::operator new(size_t size) {
65 return userMalloc(size);
68 void Thread::operator delete(void *ptr) {
72 Thread::Thread(thrd_t *t, void (*func)(), void *a) {
79 /* Initialize state */
80 ret = create_context();
82 printf("Error in create_context\n");
84 state = THREAD_CREATED;
85 id = model->get_next_id();
87 parent = thread_current();
93 model->remove_thread(this);
96 thread_id_t Thread::get_id()