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pyon/store_file: replace previous file atomically

This commit is contained in:
Sebastien Bourdeauducq 2015-05-24 21:26:15 +08:00
parent fc449509b8
commit ae4615281f
1 changed files with 8 additions and 7 deletions
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15
artiq/protocols/pyon.py
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@ -20,6 +20,8 @@ function call syntax to mark special data types.
import base64 import base64
from fractions import Fraction from fractions import Fraction
import os
import tempfile
import numpy import numpy
@ -158,18 +160,17 @@ def decode(s):
def store_file(filename, x): def store_file(filename, x):
"""Encodes a Python object and writes it to the specified file. """Encodes a Python object and writes it to the specified file."""
"""
contents = encode(x, True) contents = encode(x, True)
with open(filename, "w") as f: directory = os.path.abspath(os.path.dirname(filename))
with tempfile.NamedTemporaryFile("w", dir=directory, delete=False) as f:
f.write(contents) f.write(contents)
f.write("\n") f.write("\n")
tmpname = f.name
os.replace(tmpname, filename)
def load_file(filename): def load_file(filename):
"""Parses the specified file and returns the decoded Python object. """Parses the specified file and returns the decoded Python object."""
"""
with open(filename, "r") as f: with open(filename, "r") as f:
return decode(f.read()) return decode(f.read())