File size: 1,047 Bytes
f9c42e5 | 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 | from typing import Tuple
from dataclasses import dataclass
import numpy as np
from multiprocessing.managers import SharedMemoryManager
from atomics import atomicview, MemoryOrder, UINT
@dataclass
class ArraySpec:
name: str
shape: Tuple[int]
dtype: np.dtype
class SharedAtomicCounter:
def __init__(self, shm_manager: SharedMemoryManager, size: int = 8): # 64bit int
shm = shm_manager.SharedMemory(size=size)
self.shm = shm
self.size = size
self.store(0) # initialize
@property
def buf(self):
return self.shm.buf[: self.size]
def load(self) -> int:
with atomicview(buffer=self.buf, atype=UINT) as a:
value = a.load(order=MemoryOrder.ACQUIRE)
return value
def store(self, value: int):
with atomicview(buffer=self.buf, atype=UINT) as a:
a.store(value, order=MemoryOrder.RELEASE)
def add(self, value: int):
with atomicview(buffer=self.buf, atype=UINT) as a:
a.add(value, order=MemoryOrder.ACQ_REL)
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