#include <string.h>
#include <threads.h>
+#include <mutex>
#include "common.h"
#include "threads-model.h"
+#include "action.h"
/* global "model" object */
#include "model.h"
snapshot_free(stack);
}
-/** Return the currently executing thread. */
+/**
+ * @brief Get the current Thread
+ *
+ * Must be called from a user context
+ *
+ * @return The currently executing thread
+ */
Thread * thread_current(void)
{
ASSERT(model);
*/
int Thread::swap(Thread *t, ucontext_t *ctxt)
{
+ t->set_state(THREAD_READY);
return swapcontext(&t->context, ctxt);
}
*/
int Thread::swap(ucontext_t *ctxt, Thread *t)
{
+ t->set_state(THREAD_RUNNING);
return swapcontext(ctxt, &t->context);
}
* @param func The function that the thread will call.
* @param a The parameter to pass to this function.
*/
-Thread::Thread(thrd_t *t, void (*func)(void *), void *a) :
+Thread::Thread(thrd_t *t, void (*func)(void *), void *a, Thread *parent) :
+ parent(parent),
creation(NULL),
pending(NULL),
start_routine(func),
model_print("Error in create_context\n");
id = model->get_next_id();
- *user_thread = id;
- parent = thread_current();
+ user_thread->priv = this;
}
/** Destructor */
ASSERT(s == THREAD_COMPLETED || state != THREAD_COMPLETED);
state = s;
}
+
+/**
+ * Get the Thread that this Thread is waiting on
+ * @return The thread we are waiting on, if any; otherwise NULL
+ */
+Thread * Thread::waiting_on() const
+{
+ if (!pending)
+ return NULL;
+
+ if (pending->get_type() == THREAD_JOIN)
+ return pending->get_thread_operand();
+ else if (pending->is_lock())
+ return (Thread *)pending->get_mutex()->get_state()->locked;
+ return NULL;
+}