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from __future__ import division, absolute_import, print_function, unicode_literals
__USE_CYTHON_NO = 0 # Do not use Cython.
__USE_CYTHON_TRY = 1 # Try to use Cython, if available.
__USE_CYTHON_FORCE = 2 # Use Cython. Abort if not available.
__USE_CYTHON_VERBOSE = 3 # Use Cython. Abort if not available. Be verbose.
__useCython = None
def cythonModuleName(modname):
elems = modname.split(".")
elems[0] = elems[0] + "_cython"
return ".".join(elems)
def __checkCython():
global __useCython
import os
if __useCython is None:
try:
__useCython = int(os.getenv("AWLSIM_CYTHON",
str(__USE_CYTHON_NO)))
if __useCython not in (__USE_CYTHON_NO,
__USE_CYTHON_TRY,
__USE_CYTHON_FORCE,
__USE_CYTHON_VERBOSE):
raise ValueError
except ValueError:
__useCython = __USE_CYTHON_NO
def shouldUseCython(modname=None):
__checkCython()
if __useCython == __USE_CYTHON_VERBOSE and modname:
print("Awlsim-cython: Importing '%s' instead of '%s'" %\
(cythonModuleName(modname), modname))
return __useCython != __USE_CYTHON_NO
def cythonImportError(modname, message):
global __useCython
import sys, os
def perr(msg):
if sys.stderr:
sys.stderr.write(msg)
sys.stderr.flush()
if __useCython == __USE_CYTHON_TRY:
perr("WARNING: Failed to import awlsim CYTHON module '%s': %s\n"
"--> Falling back to standard Python modules...\n" %\
(modname, message))
__useCython = __USE_CYTHON_NO
elif __useCython in (__USE_CYTHON_FORCE, __USE_CYTHON_VERBOSE):
perr("\n\nERROR: Failed to import awlsim CYTHON module '%s': %s\n\n"
"Python interpreter: %s\n"
"PYTHONPATH=\"%s\"\n\n"
"Aborting.\n" %\
(modname, message, sys.executable, os.environ.get("PYTHONPATH", "")))
sys.exit(1)
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