openpilot is an open source driver assistance system. openpilot performs the functions of Automated Lane Centering and Adaptive Cruise Control for over 200 supported car makes and models.

43 lines
1.1 KiB

import os
import sys
import fcntl
import hashlib
from cffi import FFI
TMPDIR = "/tmp/ccache"
def ffi_wrap(name, c_code, c_header, tmpdir=TMPDIR, cflags="", libraries=[]):
cache = name + "_" + hashlib.sha1(c_code).hexdigest()
try:
os.mkdir(tmpdir)
except OSError:
pass
fd = os.open(tmpdir, 0)
fcntl.flock(fd, fcntl.LOCK_EX)
try:
sys.path.append(tmpdir)
try:
mod = __import__(cache)
except Exception:
print "cache miss", cache
compile_code(cache, c_code, c_header, tmpdir, cflags, libraries)
mod = __import__(cache)
finally:
os.close(fd)
return mod.ffi, mod.lib
def compile_code(name, c_code, c_header, directory, cflags="", libraries=[]):
ffibuilder = FFI()
ffibuilder.set_source(name, c_code, source_extension='.cpp', libraries=libraries)
ffibuilder.cdef(c_header)
os.environ['OPT'] = "-fwrapv -O2 -DNDEBUG -std=c++11"
os.environ['CFLAGS'] = cflags
ffibuilder.compile(verbose=True, debug=False, tmpdir=directory)
def wrap_compiled(name, directory):
sys.path.append(directory)
mod = __import__(name)
return mod.ffi, mod.lib