#include <cpu/atomic/swap.h>
#include <globals.h>
#include <lib/kmem.h>
#include <sys/schedule.h>
#include <util/mutex.h>

///unsigned char lock_mutex(struct Mutex* m, unsigned long pid)
///{
///	if (m->pid == NULL_PID) {
///		// Use currently running thread's PID if no pid given
///		if (pid == 0) {
///			struct Thread* thread = scheduler.rthread;
///			atm_lock(thread->pid, &m->pid);
///		} else {
///			atm_lock(pid, &m->pid);
///		}
///		return 0;
///	}
///	struct Thread* thread = scheduler.rthread;
///	thread->status = THREAD_MWAIT;
///	thread->mptr = m;
///	return 1;
///}
///
///// Eventually, there will need to be a hook into the scheduling mechanism
/////  that checks the currently running process and check that against the
/////  mutex's pid lock
///unsigned char release_mutex(struct Mutex* m, unsigned long pid)
///{
///	// Use current thread's PID if no pid
///	if (pid == 0) {
///		struct Thread* thread = scheduler.rthread;
///		if (m->pid == thread->pid) {
///			atm_release(&m->pid);
///			return 0;
///		}
///	}
///	else if (m->pid == pid) {
///		atm_release(&m->pid);
///		return 0;
///	}
///	return 1;
///}

struct Mutex* create_mutex(void* addr)
{
	// Ensure aligned to word - Important for Atomic Swap
	struct Mutex* m = (struct Mutex*)kmalloc(sizeof(struct Mutex));
	m->addr = addr;
	m->pid = 0;
	return m;
}