#include "Pledge.h"
#include "memory/MemoryManager.h"
#include "sys/Syscall.h"
#include "thread/Scheduler.h"
#include <bits/memstat.h>

Result<u64> sys_memstat(Registers*, SyscallArgs args)
{
    auto* current = Scheduler::current();
    TRY(check_pledge(current, Promise::p_stdio));

    struct membuf buf;
    buf.mem_total = MemoryManager::total();
    buf.mem_used = MemoryManager::used();
    buf.mem_free = MemoryManager::free();
    buf.mem_reserved = MemoryManager::reserved();

    if (!MemoryManager::copy_to_user_typed((struct membuf*)args[0], &buf)) return err(EFAULT);

    return 0;
}