blob: b9aa199905999529f883fd5f26b23e42a318567a (
plain)
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
50
51
52
53
54
55
56
|
# -*- test-case-name: twisted.internet.test.test_default -*-
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
The most suitable default reactor for the current platform.
Depending on a specific application's needs, some other reactor may in
fact be better.
"""
__all__ = ["install"]
from twisted.python.runtime import platform
def _getInstallFunction(platform):
"""
Return a function to install the reactor most suited for the given platform.
@param platform: The platform for which to select a reactor.
@type platform: L{twisted.python.runtime.Platform}
@return: A zero-argument callable which will install the selected
reactor.
"""
# Linux: epoll(7) is the fault, since it scales well.
#
# OS X: poll(2) is not exposed by Python because it doesn't
# support all file descriptors (in particular, lack of PTY support
# is a problem) -- see <http://bugs.python.org/issue5154>. kqueue
# reactor is being rewritten (see
# <http://twistedmatrix.com/trac/ticket/1918>), and also has same
# restriction as poll(2) as far PTY support goes.
#
# Windows: IOCP should eventually be default, but still has some serious
# bugs, e.g. <http://twistedmatrix.com/trac/ticket/4667>.
#
# We therefore choose epoll(7) on Linux, poll(2) on other non-OS X POSIX
# platforms, and select(2) everywhere else.
try:
if platform.isLinux():
try:
from twisted.internet.epollreactor import install
except ImportError:
from twisted.internet.pollreactor import install
elif platform.getType() == 'posix' and not platform.isMacOSX():
from twisted.internet.pollreactor import install
else:
from twisted.internet.selectreactor import install
except ImportError:
from twisted.internet.selectreactor import install
return install
install = _getInstallFunction(platform)
|
