def generate_native_function(fn: FuncIR, emitter: Emitter, source_path: str,
module_name: str) -> None:
declarations = Emitter(emitter.context, fn.env)
body = Emitter(emitter.context, fn.env)
visitor = FunctionEmitterVisitor(body, declarations, fn.name, source_path,
module_name)
declarations.emit_line('{} {{'.format(native_function_header(fn, emitter)))
body.indent()
for r, i in fn.env.indexes.items():
if isinstance(r.type, RTuple):
emitter.declare_tuple_struct(r.type)
if i < len(fn.args):
continue # skip the arguments
ctype = emitter.ctype_spaced(r.type)
declarations.emit_line('{ctype}{prefix}{name};'.format(
ctype=ctype, prefix=REG_PREFIX, name=r.name))
# Before we emit the blocks, give them all labels
for i, block in enumerate(fn.blocks):
block.label = i
for block in fn.blocks:
body.emit_label(block)
for op in block.ops:
op.accept(visitor)
body.emit_line('}')
emitter.emit_from_emitter(declarations)
emitter.emit_from_emitter(body)
def generate_wrapper_core(fn: FuncIR,
emitter: Emitter,
optional_args: Optional[List[RuntimeArg]] = None,
arg_names: Optional[List[str]] = None,
cleanups: Optional[List[str]] = None,
traceback_code: Optional[str] = None) -> None:
"""Generates the core part of a wrapper function for a native function.
This expects each argument as a PyObject * named obj_{arg} as a precondition.
It converts the PyObject *s to the necessary types, checking and unboxing if necessary,
makes the call, then boxes the result if necessary and returns it.
"""
optional_args = optional_args or []
cleanups = cleanups or []
use_goto = bool(cleanups or traceback_code)
error_code = 'return NULL;' if not use_goto else 'goto fail;'
arg_names = arg_names or [arg.name for arg in fn.args]
for arg_name, arg in zip(arg_names, fn.args):
# Suppress the argument check for *args/**kwargs, since we know it must be right.
typ = arg.type if arg.kind not in (ARG_STAR,
ARG_STAR2) else object_rprimitive
generate_arg_check(arg_name, typ, emitter, error_code, arg
in optional_args)
native_args = ', '.join('arg_{}'.format(arg) for arg in arg_names)
if fn.ret_type.is_unboxed or use_goto:
# TODO: The Py_RETURN macros return the correct PyObject * with reference count handling.
# Are they relevant?
emitter.emit_line('{}retval = {}{}({});'.format(
emitter.ctype_spaced(fn.ret_type), NATIVE_PREFIX,
fn.cname(emitter.names), native_args))
emitter.emit_lines(*cleanups)
if fn.ret_type.is_unboxed:
emitter.emit_error_check('retval', fn.ret_type, 'return NULL;')
emitter.emit_box('retval',
'retbox',
fn.ret_type,
declare_dest=True)
emitter.emit_line('return {};'.format(
'retbox' if fn.ret_type.is_unboxed else 'retval'))
else:
emitter.emit_line('return {}{}({});'.format(NATIVE_PREFIX,
fn.cname(emitter.names),
native_args))
# TODO: Tracebacks?
if use_goto:
emitter.emit_label('fail')
emitter.emit_lines(*cleanups)
if traceback_code:
emitter.emit_lines(traceback_code)
emitter.emit_lines('return NULL;')
def generate_native_function(fn: FuncIR, emitter: Emitter) -> None:
declarations = Emitter(emitter.context, fn.env)
body = Emitter(emitter.context, fn.env)
visitor = FunctionEmitterVisitor(body, declarations)
declarations.emit_line('{} {{'.format(native_function_header(fn)))
body.indent()
for i in range(len(fn.args), fn.env.num_regs()):
ctype = fn.env.types[i].ctype
declarations.emit_line('{ctype} {prefix}{name};'.format(
ctype=ctype, prefix=REG_PREFIX, name=fn.env.names[i]))
for block in fn.blocks:
body.emit_label(block.label)
for op in block.ops:
op.accept(visitor)
body.emit_line('}')
emitter.emit_from_emitter(declarations)
emitter.emit_from_emitter(body)
