beremiz

Attempt (disabled) to systematically attach a cobalt shadow thread to python threads.
svghmi
2019-12-09, Edouard Tisserant
7825a76f5ffb
Attempt (disabled) to systematically attach a cobalt shadow thread to python threads.
When experimenting with pthread_cond, didn't see any enhancement.
#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# See COPYING.Runtime file for copyrights details.
#
from __future__ import absolute_import
from ctypes import CDLL, RTLD_GLOBAL, pointer, c_int, POINTER, c_char, create_string_buffer
import threading
def installThreadCobaltHook():
init_old = threading.Thread.__init__
def init(self, *args, **kwargs):
init_old(self, *args, **kwargs)
run_old = self.run
def run_with_shadow(*args, **kw):
print("hello from thread"+repr(self))
cobalt.cobalt_thread_harden()
run_old(*args, **kw)
self.run = run_with_shadow
threading.Thread.__init__ = init
def TryPreloadXenomai():
"""
Xenomai 3 (at least for version <= 3.0.6) do not handle properly dlclose
of shared objects whose dlopen did trigger xenomai_init.
As a workaround, this pre-loads xenomai libraries that need to be
initialized and call xenomai_init once for all.
Xenomai auto init of libs MUST be disabled (see --auto-init-solib in xeno-config)
"""
try:
for name in ["cobalt", "modechk", "copperplate", "alchemy"]:
globals()[name] = CDLL("lib"+name+".so", mode=RTLD_GLOBAL)
cobalt.xenomai_init(pointer(c_int(0)), pointer((POINTER(c_char)*2)(create_string_buffer("prog_name"), None)))
except Exception:
return
# installThreadCobaltHook()