diff options
Diffstat (limited to 'cffi/vengine_cpy.py')
| -rw-r--r-- | cffi/vengine_cpy.py | 87 |
1 files changed, 74 insertions, 13 deletions
diff --git a/cffi/vengine_cpy.py b/cffi/vengine_cpy.py index 536f11f..6de0df0 100644 --- a/cffi/vengine_cpy.py +++ b/cffi/vengine_cpy.py @@ -275,22 +275,23 @@ class VCPythonEngine(object): tovar, tp.get_c_name(''), errvalue)) self._prnt(' %s;' % errcode) - def _extra_local_variables(self, tp, localvars): + def _extra_local_variables(self, tp, localvars, freelines): if isinstance(tp, model.PointerType): localvars.add('Py_ssize_t datasize') + localvars.add('struct _cffi_freeme_s *large_args_free = NULL') + freelines.add('if (large_args_free != NULL)' + ' _cffi_free_array_arguments(large_args_free);') def _convert_funcarg_to_c_ptr_or_array(self, tp, fromvar, tovar, errcode): self._prnt(' datasize = _cffi_prepare_pointer_call_argument(') self._prnt(' _cffi_type(%d), %s, (char **)&%s);' % ( self._gettypenum(tp), fromvar, tovar)) self._prnt(' if (datasize != 0) {') - self._prnt(' if (datasize < 0)') - self._prnt(' %s;' % errcode) - self._prnt(' %s = alloca((size_t)datasize);' % (tovar,)) - self._prnt(' memset((void *)%s, 0, (size_t)datasize);' % (tovar,)) - self._prnt(' if (_cffi_convert_array_from_object(' - '(char *)%s, _cffi_type(%d), %s) < 0)' % ( - tovar, self._gettypenum(tp), fromvar)) + self._prnt(' %s = ((size_t)datasize) <= 640 ? ' + 'alloca((size_t)datasize) : NULL;' % (tovar,)) + self._prnt(' if (_cffi_convert_array_argument(_cffi_type(%d), %s, ' + '(char **)&%s,' % (self._gettypenum(tp), fromvar, tovar)) + self._prnt(' datasize, &large_args_free) < 0)') self._prnt(' %s;' % errcode) self._prnt(' }') @@ -369,15 +370,17 @@ class VCPythonEngine(object): prnt(' %s;' % type.get_c_name(' x%d' % i, context)) # localvars = set() + freelines = set() for type in tp.args: - self._extra_local_variables(type, localvars) - for decl in localvars: + self._extra_local_variables(type, localvars, freelines) + for decl in sorted(localvars): prnt(' %s;' % (decl,)) # if not isinstance(tp.result, model.VoidType): result_code = 'result = ' context = 'result of %s' % name prnt(' %s;' % tp.result.get_c_name(' result', context)) + prnt(' PyObject *pyresult;') else: result_code = '' # @@ -409,9 +412,14 @@ class VCPythonEngine(object): if numargs == 0: prnt(' (void)noarg; /* unused */') if result_code: - prnt(' return %s;' % + prnt(' pyresult = %s;' % self._convert_expr_from_c(tp.result, 'result', 'result type')) + for freeline in freelines: + prnt(' ' + freeline) + prnt(' return pyresult;') else: + for freeline in freelines: + prnt(' ' + freeline) prnt(' Py_INCREF(Py_None);') prnt(' return Py_None;') prnt('}') @@ -754,7 +762,7 @@ class VCPythonEngine(object): if isinstance(tp, model.ArrayType): tp_ptr = model.PointerType(tp.item) self._generate_cpy_const(False, name, tp, vartp=tp_ptr, - size_too = (tp.length == '...')) + size_too = tp.length_is_unknown()) else: tp_ptr = model.PointerType(tp) self._generate_cpy_const(False, name, tp_ptr, category='var') @@ -766,7 +774,7 @@ class VCPythonEngine(object): value = getattr(library, name) if isinstance(tp, model.ArrayType): # int a[5] is "constant" in the # sense that "a=..." is forbidden - if tp.length == '...': + if tp.length_is_unknown(): assert isinstance(value, tuple) (value, size) = value BItemType = self.ffi._get_cached_btype(tp.item) @@ -981,6 +989,59 @@ static PyObject *_cffi_setup(PyObject *self, PyObject *args) return PyBool_FromLong(was_alive); } +union _cffi_union_alignment_u { + unsigned char m_char; + unsigned short m_short; + unsigned int m_int; + unsigned long m_long; + unsigned long long m_longlong; + float m_float; + double m_double; + long double m_longdouble; +}; + +struct _cffi_freeme_s { + struct _cffi_freeme_s *next; + union _cffi_union_alignment_u alignment; +}; + +#ifdef __GNUC__ + __attribute__((unused)) +#endif +static int _cffi_convert_array_argument(CTypeDescrObject *ctptr, PyObject *arg, + char **output_data, Py_ssize_t datasize, + struct _cffi_freeme_s **freeme) +{ + char *p; + if (datasize < 0) + return -1; + + p = *output_data; + if (p == NULL) { + struct _cffi_freeme_s *fp = (struct _cffi_freeme_s *)PyObject_Malloc( + offsetof(struct _cffi_freeme_s, alignment) + (size_t)datasize); + if (fp == NULL) + return -1; + fp->next = *freeme; + *freeme = fp; + p = *output_data = (char *)&fp->alignment; + } + memset((void *)p, 0, (size_t)datasize); + return _cffi_convert_array_from_object(p, ctptr, arg); +} + +#ifdef __GNUC__ + __attribute__((unused)) +#endif +static void _cffi_free_array_arguments(struct _cffi_freeme_s *freeme) +{ + do { + void *p = (void *)freeme; + freeme = freeme->next; + PyObject_Free(p); + } while (freeme != NULL); +} + static int _cffi_init(void) { PyObject *module, *c_api_object = NULL; |