"""
virtual_gpu_driver/src/command_queue.py
Command queue and scheduler for compute/graphics commands.
"""
import threading
import queue

class Command:
    def __init__(self, cmd_type, args, dependencies=None):
        self.cmd_type = cmd_type
        self.args = args
        self.dependencies = dependencies or []
        self.completed = threading.Event()

class CommandQueue:
    def __init__(self, num_chips, num_sms):
        self.queue = queue.Queue()
        self.num_chips = num_chips
        self.num_sms = num_sms
        self.lock = threading.Lock()
        self.chip_states = [None] * num_chips
        self.sm_states = [[None]*num_sms for _ in range(num_chips)]

    def enqueue(self, command):
        self.queue.put(command)

    def dispatch(self):
        # Round-robin dispatch to chips/SMs
        while not self.queue.empty():
            cmd = self.queue.get()
            # For demo: just mark as complete
            cmd.completed.set()

    def wait_for_all(self):
        # Wait for all commands to complete
        while not self.queue.empty():
            cmd = self.queue.get()
            cmd.completed.wait()
