feat[pthread]: implement with thread with pthread lib

src/thread/thread.c

@@ -0,0 +1,31 @@
+#include "thread.h"
+#include "debug.h"
+#include "pthread.h"
+#include <sched.h>
+
+
+int thread_yield(void) {
+  TRACE("yield\n");
+  return sched_yield();
+}
+
+
+thread_t thread_self(void) {
+return (void *) pthread_self();
+}
+
+int thread_create(thread_t *newthread, void *(*func)(void *), void *funcarg) {
+  TRACE("Create a new thread that execute function %p", func);
+  return pthread_create((pthread_t *) newthread, NULL, func, funcarg);
+}
+
+int thread_join(thread_t thread, void **retval) {
+  TRACE("Join thread %p", thread);
+  return pthread_join((pthread_t) thread, retval);
+}
+
+void thread_exit(void *retval) {
+  TRACE("Exit thread");
+  pthread_exit(retval);
+}
+