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"""InsightToolkit support module to help load its packages."""
import sys,os
# Get the path to the directory containing this script. It may be
# used to set pkgdir below, depending on how this script is
# configured.
if __name__ == '__main__':
selfpath = os.path.abspath(sys.path[0] or os.curdir)
else:
selfpath = os.path.abspath(os.path.dirname(__file__))
# The directory containing the binary ITK python wrapper libraries.
pkgdir = @ITK_CSWIG_PACKAGE_DIR@
# Python "help(sys.setdlopenflags)" states:
#
# setdlopenflags(...)
# setdlopenflags(n) -> None
#
# Set the flags that will be used for dlopen() calls. Among other
# things, this will enable a lazy resolving of symbols when
# importing a module, if called as sys.setdlopenflags(0) To share
# symbols across extension modules, call as
#
# sys.setdlopenflags(dl.RTLD_NOW|dl.RTLD_GLOBAL)
#
# GCC 3.x depends on proper merging of symbols for RTTI:
# http://gcc.gnu.org/faq.html#dso
#
# The Python setup.py states that the "dl" module
# requires "sizeof(int) == sizeof(long) == sizeof(char*)".
# Therefore the dl module is missing on 64-bit platforms.
# Since RTLD_NOW==0x002 and RTLD_GLOBAL==0x100 very commonly
# we will just guess that the proper flags are 0x102 when there
# is no dl module.
def preimport():
"""Called by InsightToolkit packages before loading a C module."""
# Save the current dlopen flags and set the ones we need.
try:
import dl
newflags = dl.RTLD_NOW|dl.RTLD_GLOBAL
except:
newflags = 0x102 # No dl module, so guess (see above).
try:
oldflags = sys.getdlopenflags()
sys.setdlopenflags(newflags)
except:
oldflags = None
# Save the current working directory and change to that containing
# the python wrapper libraries. They have '.' in their rpaths, so
# they will find the libraries on which they depend.
cwd = os.getcwd()
os.chdir(pkgdir)
# Add the binary package directory to the python module search path.
sys.path.insert(1, pkgdir)
return [cwd, oldflags]
def postimport(data):
"""Called by InsightToolkit packages after loading a C module."""
# Remove the binary package directory to the python module search path.
sys.path.remove(pkgdir)
# Restore the original working directory.
os.chdir(data[0])
# Restore the original dlopen flags.
try:
sys.setdlopenflags(data[1])
except:
pass
# Default location for test output
defaultTestRoot = @ITK_CSWIG_TEST_ROOT@
# Default location for test input
defaultDataRoot = @ITK_CSWIG_DATA_ROOT@
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