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from rpython.rtyper.lltypesystem.lltype import typeOf, Void
from rpython.translator.c.support import USESLOTS # set to False if necessary while refactoring
from rpython.translator.c.support import cdecl, somelettersfrom
class CExternalFunctionCodeGenerator(object):
if USESLOTS:
__slots__ = """db fnptr FUNCTYPE argtypenames resulttypename""".split()
def __init__(self, fnptr, db):
self.fnptr = fnptr
self.db = db
self.FUNCTYPE = typeOf(fnptr)
assert Void not in self.FUNCTYPE.ARGS
self.argtypenames = [db.gettype(T) for T in self.FUNCTYPE.ARGS]
self.resulttypename = db.gettype(self.FUNCTYPE.RESULT)
def graphs_to_patch(self):
return []
def name(self, cname): #virtual
return cname
def argnames(self):
return ['%s%d' % (somelettersfrom(self.argtypenames[i]), i)
for i in range(len(self.argtypenames))]
def allconstantvalues(self):
return []
def implementation_begin(self):
pass
def cfunction_declarations(self):
if self.FUNCTYPE.RESULT is not Void:
yield '%s;' % cdecl(self.resulttypename, 'result')
def cfunction_body(self):
try:
convert_params = self.fnptr.convert_params
except AttributeError:
convert_params = lambda backend, args: [arg for _,arg in args]
call = '%s(%s)' % (self.fnptr._name, ', '.join(convert_params("c", zip(self.FUNCTYPE.ARGS, self.argnames()))))
if self.FUNCTYPE.RESULT is not Void:
yield 'result = %s;' % call
yield 'if (PyErr_Occurred()) RPyConvertExceptionFromCPython();'
yield 'return result;'
else:
yield '%s;' % call
yield 'if (PyErr_Occurred()) RPyConvertExceptionFromCPython();'
def implementation_end(self):
pass
assert not USESLOTS or '__dict__' not in dir(CExternalFunctionCodeGenerator)
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