def call(self, funcspec, args, RESULT, init_result=0, is_struct=False):
"""
Call the specified function after constructing and ArgChain with the
arguments in ``args``.
The function is specified with ``funcspec``, which is a tuple of the
form (lib, name, argtypes, restype).
This method is overridden by metainterp/test/test_fficall.py in
order to do the call in a loop and JIT it. The optional arguments are
used only by that overridden method.
"""
lib, name, argtypes, restype = funcspec
func = lib.getpointer(name, argtypes, restype)
chain = ArgChain()
for arg in args:
if isinstance(arg, r_singlefloat):
chain.arg_singlefloat(float(arg))
elif IS_32_BIT and isinstance(arg, r_longlong):
chain.arg_longlong(longlong2float(arg))
elif IS_32_BIT and isinstance(arg, r_ulonglong):
arg = rffi.cast(rffi.LONGLONG, arg)
chain.arg_longlong(longlong2float(arg))
elif isinstance(arg, tuple):
methname, arg = arg
meth = getattr(chain, methname)
meth(arg)
else:
chain.arg(arg)
return func.call(chain, RESULT, is_struct=is_struct)
