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42 lines
1017 B
42 lines
1017 B
import os
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import sys
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import fcntl
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import hashlib
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from cffi import FFI
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TMPDIR = "/tmp/ccache"
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def ffi_wrap(name, c_code, c_header, tmpdir=TMPDIR):
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cache = name + "_" + hashlib.sha1(c_code).hexdigest()
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try:
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os.mkdir(tmpdir)
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except OSError:
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pass
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fd = os.open(tmpdir, 0)
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fcntl.flock(fd, fcntl.LOCK_EX)
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try:
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sys.path.append(tmpdir)
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try:
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mod = __import__(cache)
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except Exception:
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print "cache miss", cache
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compile_code(cache, c_code, c_header, tmpdir)
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mod = __import__(cache)
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finally:
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os.close(fd)
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return mod.ffi, mod.lib
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def compile_code(name, c_code, c_header, directory):
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ffibuilder = FFI()
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ffibuilder.set_source(name, c_code, source_extension='.cpp')
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ffibuilder.cdef(c_header)
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os.environ['OPT'] = "-fwrapv -O2 -DNDEBUG -std=c++11"
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os.environ['CFLAGS'] = ""
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ffibuilder.compile(verbose=True, debug=False, tmpdir=directory)
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def wrap_compiled(name, directory):
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sys.path.append(directory)
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mod = __import__(name)
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return mod.ffi, mod.lib
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