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Avoid using PyQt to detect the number of CPUs on windows

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Kovid Goyal 2014-07-12 18:08:55 +05:30
parent 12882d2a99
commit 6a5acd3fe7
1 changed files with 12 additions and 10 deletions
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10
src/calibre/__init__.py
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@ -471,16 +471,18 @@ class CurrentDir(object):
def detect_ncpus(): def detect_ncpus():
"""Detects the number of effective CPUs in the system""" """Detects the number of effective CPUs in the system"""
if iswindows:
import win32api
ans = win32api.GetSystemInfo()[5]
else:
import multiprocessing import multiprocessing
ans = -1 ans = -1
try: try:
ans = multiprocessing.cpu_count() ans = multiprocessing.cpu_count()
except: except Exception:
from PyQt5.Qt import QThread from PyQt5.Qt import QThread
ans = QThread.idealThreadCount() ans = QThread.idealThreadCount()
if ans < 1: return max(1, ans)
ans = 1
return ans
relpath = os.path.relpath relpath = os.path.relpath