more common/ pruning (#30778)

old-commit-hash: 8c1176ca839bdfd805f87d281a6d06b9af881eb5

common/ffi_wrapper.py

@@ -1,55 +1,8 @@
-import os
-import sys
-import fcntl
-import hashlib
 import platform
-from cffi import FFI
+
 
 def suffix():
   if platform.system() == "Darwin":
     return ".dylib"
   else:
     return ".so"
-
-def ffi_wrap(name, c_code, c_header, tmpdir="/tmp/ccache", cflags="", libraries=None):
-  if libraries is None:
-    libraries = []
-
-  cache = name + "_" + hashlib.sha1(c_code.encode('utf-8')).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(f"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=None):
-  if libraries is None:
-    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++1z"
-  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