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36333c5 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 | """Common lifecycle contract for otherwise isolated model adapters."""
from __future__ import annotations
from abc import ABC, abstractmethod
from config import Settings
from core.runtime import cleanup_memory
class ModelAdapter(ABC):
"""A lazy model with explicit device release and full unload hooks."""
name: str
def __init__(self, settings: Settings) -> None:
self.settings = settings
self.device = "cpu"
self.loaded = False
def ensure_loaded(self, device: str) -> None:
"""Load once, or reactivate an already resident model."""
if not self.loaded:
self.load(device)
self.loaded = True
else:
self.activate(device)
self.device = device
@abstractmethod
def load(self, device: str) -> None:
"""Load model weights and processors."""
def activate(self, device: str) -> None:
"""Move a cached model back to an accelerator when necessary."""
@abstractmethod
def release_gpu(self) -> None:
"""Move allocations off GPU after every inference call."""
@abstractmethod
def unload(self) -> None:
"""Release all model references before another model is loaded."""
def mark_unloaded(self) -> None:
self.loaded = False
self.device = "cpu"
cleanup_memory()
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