forked from M-Labs/artiq
215 lines
6.9 KiB
Python
215 lines
6.9 KiB
Python
from operator import setitem
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from collections import OrderedDict
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import importlib
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import logging
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import os
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import tempfile
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import re
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from artiq.protocols.sync_struct import Notifier
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from artiq.protocols.pc_rpc import AutoTarget, Client, BestEffortClient
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logger = logging.getLogger(__name__)
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class RIDCounter:
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def __init__(self, cache_filename="last_rid.pyon", results_dir="results"):
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self.cache_filename = cache_filename
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self.results_dir = results_dir
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self._next_rid = self._last_rid() + 1
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logger.debug("Next RID is %d", self._next_rid)
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def get(self):
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rid = self._next_rid
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self._next_rid += 1
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self._update_cache(rid)
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return rid
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def _last_rid(self):
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try:
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rid = self._last_rid_from_cache()
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except FileNotFoundError:
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logger.debug("Last RID cache not found, scanning results")
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rid = self._last_rid_from_results()
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self._update_cache(rid)
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return rid
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else:
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logger.debug("Using last RID from cache")
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return rid
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def _update_cache(self, rid):
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contents = str(rid) + "\n"
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directory = os.path.abspath(os.path.dirname(self.cache_filename))
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with tempfile.NamedTemporaryFile("w", dir=directory, delete=False
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) as f:
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f.write(contents)
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tmpname = f.name
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os.replace(tmpname, self.cache_filename)
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def _last_rid_from_cache(self):
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with open(self.cache_filename, "r") as f:
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return int(f.read())
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def _last_rid_from_results(self):
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r = -1
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try:
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day_folders = os.listdir(self.results_dir)
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except:
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return r
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day_folders = filter(
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lambda x: re.fullmatch("\\d\\d\\d\\d-\\d\\d-\\d\\d", x),
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day_folders)
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for df in day_folders:
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day_path = os.path.join(self.results_dir, df)
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try:
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hm_folders = os.listdir(day_path)
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except:
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continue
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hm_folders = filter(lambda x: re.fullmatch("\\d\\d(-\\d\\d)?", x),
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hm_folders)
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for hmf in hm_folders:
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hm_path = os.path.join(day_path, hmf)
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try:
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h5files = os.listdir(hm_path)
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except:
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continue
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for x in h5files:
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m = re.fullmatch(
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"(\\d\\d\\d\\d\\d\\d\\d\\d\\d)-.*\\.h5", x)
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if m is None:
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continue
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rid = int(m.group(1))
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if rid > r:
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r = rid
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return r
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def _create_device(desc, device_mgr):
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ty = desc["type"]
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if ty == "local":
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module = importlib.import_module(desc["module"])
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device_class = getattr(module, desc["class"])
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return device_class(device_mgr, **desc.get("arguments", {}))
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elif ty == "controller":
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if desc.get("best_effort", False):
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cls = BestEffortClient
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else:
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cls = Client
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# Automatic target can be specified either by the absence of
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# the target_name parameter, or a None value.
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target_name = desc.get("target_name", None)
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if target_name is None:
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target_name = AutoTarget
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return cls(desc["host"], desc["port"], target_name)
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elif ty == "controller_aux_target":
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controller = device_mgr.get_desc(desc["controller"])
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if desc.get("best_effort", controller.get("best_effort", False)):
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cls = BestEffortClient
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else:
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cls = Client
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return cls(controller["host"], controller["port"], desc["target_name"])
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else:
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raise ValueError("Unsupported type in device DB: " + ty)
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class DeviceError(Exception):
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pass
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class DeviceManager:
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"""Handles creation and destruction of local device drivers and controller
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RPC clients."""
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def __init__(self, ddb, virtual_devices=dict()):
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self.ddb = ddb
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self.virtual_devices = virtual_devices
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self.active_devices = OrderedDict()
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def get_device_db(self):
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"""Returns the full contents of the device database."""
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return self.ddb.get_device_db()
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def get_desc(self, name):
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desc = self.ddb.get(name)
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while isinstance(desc, str):
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# alias
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desc = self.ddb.get(desc)
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return desc
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def get(self, name):
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"""Get the device driver or controller client corresponding to a
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device database entry."""
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if name in self.virtual_devices:
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return self.virtual_devices[name]
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if name in self.active_devices:
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return self.active_devices[name]
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else:
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try:
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desc = self.get_desc(name)
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except Exception as e:
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raise DeviceError("Failed to get description of device '{}'"
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.format(name)) from e
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try:
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dev = _create_device(desc, self)
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except Exception as e:
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raise DeviceError("Failed to create device '{}'"
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.format(name)) from e
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self.active_devices[name] = dev
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return dev
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def close_devices(self):
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"""Closes all active devices, in the opposite order as they were
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requested."""
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for dev in reversed(list(self.active_devices.values())):
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try:
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if isinstance(dev, (Client, BestEffortClient)):
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dev.close_rpc()
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elif hasattr(dev, "close"):
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dev.close()
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except Exception as e:
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logger.warning("Exception %r when closing device %r", e, dev)
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self.active_devices.clear()
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class DatasetManager:
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def __init__(self, ddb):
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self.broadcast = Notifier(dict())
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self.local = dict()
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self.ddb = ddb
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self.broadcast.publish = ddb.update
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def set(self, key, value, broadcast=False, persist=False, save=True):
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if persist:
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broadcast = True
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if broadcast:
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self.broadcast[key] = persist, value
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if save:
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self.local[key] = value
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def mutate(self, key, index, value):
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target = None
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if key in self.local:
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target = self.local[key]
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if key in self.broadcast.read:
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target = self.broadcast[key][1]
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if target is None:
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raise KeyError("Cannot mutate non-existing dataset")
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if isinstance(index, tuple):
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if isinstance(index[0], tuple):
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index = tuple(slice(*e) for e in index)
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else:
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index = slice(*index)
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setitem(target, index, value)
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def get(self, key):
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if key in self.local:
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return self.local[key]
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else:
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return self.ddb.get(key)
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def write_hdf5(self, f):
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for k, v in self.local.items():
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f[k] = v
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