cpython/Python/interpconfig.c at main · python/cpython · GitHub

History

269 lines (243 loc) · 8.04 KB

Raw

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

/* PyInterpreterConfig API */

#include "Python.h"

#include "pycore_interp.h" // Py_RTFLAGS

#include "pycore_pylifecycle.h"

#include <stdbool.h>

#include "config_common.h"

static const char *

gil_flag_to_str(int flag)

{

switch (flag) {

case PyInterpreterConfig_DEFAULT_GIL:

return "default";

case PyInterpreterConfig_SHARED_GIL:

return "shared";

case PyInterpreterConfig_OWN_GIL:

return "own";

default:

PyErr_SetString(PyExc_SystemError,

"invalid interpreter config 'gil' value");

return NULL;

}

static int

gil_flag_from_str(const char *str, int *p_flag)

{

int flag;

if (str == NULL) {

flag = PyInterpreterConfig_DEFAULT_GIL;

}

else if (strcmp(str, "default") == 0) {

flag = PyInterpreterConfig_DEFAULT_GIL;

}

else if (strcmp(str, "shared") == 0) {

flag = PyInterpreterConfig_SHARED_GIL;

}

else if (strcmp(str, "own") == 0) {

flag = PyInterpreterConfig_OWN_GIL;

}

else {

PyErr_Format(PyExc_ValueError,

"unsupported interpreter config .gil value '%s'", str);

return -1;

}

*p_flag = flag;

return 0;

}

PyObject *

_PyInterpreterConfig_AsDict(PyInterpreterConfig *config)

{

PyObject *dict = PyDict_New();

if (dict == NULL) {

return NULL;

}

#define ADD(NAME, OBJ) \

do { \

int res = PyDict_SetItemString(dict, NAME, (OBJ)); \

Py_DECREF(OBJ); \

if (res < 0) { \

goto error; \

} \

} while (0)

#define ADD_BOOL(FIELD) \

ADD(#FIELD, Py_NewRef(config->FIELD ? Py_True : Py_False))

#define ADD_STR(FIELD, STR) \

do { \

if (STR == NULL) { \

goto error; \

} \

PyObject *obj = PyUnicode_FromString(STR); \

if (obj == NULL) { \

goto error; \

} \

ADD(#FIELD, obj); \

} while (0)

ADD_BOOL(use_main_obmalloc);

ADD_BOOL(allow_fork);

ADD_BOOL(allow_exec);

ADD_BOOL(allow_threads);

ADD_BOOL(allow_daemon_threads);

ADD_BOOL(check_multi_interp_extensions);

ADD_STR(gil, gil_flag_to_str(config->gil));

#undef ADD_STR

#undef ADD_BOOL

#undef ADD

return dict;

error:

Py_DECREF(dict);

return NULL;

}

static int

_config_dict_get_bool(PyObject *dict, const char *name, int *p_flag)

{

PyObject *item;

if (_config_dict_get(dict, name, &item) < 0) {

return -1;

}

// For now we keep things strict, rather than using PyObject_IsTrue().

int flag = item == Py_True;

if (!flag && item != Py_False) {

Py_DECREF(item);

config_dict_invalid_type(name);

return -1;

}

Py_DECREF(item);

*p_flag = flag;

return 0;

}

static int

_config_dict_copy_str(PyObject *dict, const char *name,

char *buf, size_t bufsize)

{

PyObject *item;

if (_config_dict_get(dict, name, &item) < 0) {

return -1;

}

if (!PyUnicode_Check(item)) {

Py_DECREF(item);

config_dict_invalid_type(name);

return -1;

}

strncpy(buf, PyUnicode_AsUTF8(item), bufsize-1);

buf[bufsize-1] = '\0';

Py_DECREF(item);

return 0;

}

static int

interp_config_from_dict(PyObject *origdict, PyInterpreterConfig *config,

bool missing_allowed)

{

PyObject *dict = PyDict_New();

if (dict == NULL) {

return -1;

}

if (PyDict_Update(dict, origdict) < 0) {

goto error;

}

#define CHECK(NAME) \

do { \

if (PyErr_Occurred()) { \

goto error; \

} \

else { \

if (!missing_allowed) { \

(void)config_dict_get(dict, NAME); \

assert(PyErr_Occurred()); \

goto error; \

} \

} while (0)

#define COPY_BOOL(FIELD) \

do { \

int flag; \

if (_config_dict_get_bool(dict, #FIELD, &flag) < 0) { \

CHECK(#FIELD); \

} \

else { \

config->FIELD = flag; \

(void)PyDict_PopString(dict, #FIELD, NULL); \

} \

} while (0)

COPY_BOOL(use_main_obmalloc);

COPY_BOOL(allow_fork);

COPY_BOOL(allow_exec);

COPY_BOOL(allow_threads);

COPY_BOOL(allow_daemon_threads);

COPY_BOOL(check_multi_interp_extensions);

// PyInterpreterConfig.gil

char buf[20];

if (_config_dict_copy_str(dict, "gil", buf, 20) < 0) {

CHECK("gil");

}

else {

int flag;

if (gil_flag_from_str(buf, &flag) < 0) {

goto error;

}

config->gil = flag;

(void)PyDict_PopString(dict, "gil", NULL);

}

#undef COPY_BOOL

#undef CHECK

Py_ssize_t unused = PyDict_GET_SIZE(dict);

if (unused == 1) {

PyErr_Format(PyExc_ValueError,

"config dict has 1 extra item (%R)", dict);

goto error;

}

else if (unused > 0) {

PyErr_Format(PyExc_ValueError,

"config dict has %zd extra items (%R)", unused, dict);

goto error;

}

Py_DECREF(dict);

return 0;

error:

Py_DECREF(dict);

return -1;

}

int

_PyInterpreterConfig_InitFromDict(PyInterpreterConfig *config, PyObject *dict)

{

if (!PyDict_Check(dict)) {

PyErr_SetString(PyExc_TypeError, "dict expected");

return -1;

}

if (interp_config_from_dict(dict, config, false) < 0) {

return -1;

}

return 0;

}

int

_PyInterpreterConfig_UpdateFromDict(PyInterpreterConfig *config, PyObject *dict)

{

if (!PyDict_Check(dict)) {

PyErr_SetString(PyExc_TypeError, "dict expected");

return -1;

}

if (interp_config_from_dict(dict, config, true) < 0) {

return -1;

}

return 0;

}

int

_PyInterpreterConfig_InitFromState(PyInterpreterConfig *config,

PyInterpreterState *interp)

{

// Populate the config by re-constructing the values from the interpreter.

*config = (PyInterpreterConfig){

#define FLAG(flag) \

(interp->feature_flags & Py_RTFLAGS_ ## flag)

.use_main_obmalloc = FLAG(USE_MAIN_OBMALLOC),

.allow_fork = FLAG(FORK),

.allow_exec = FLAG(EXEC),

.allow_threads = FLAG(THREADS),

.allow_daemon_threads = FLAG(DAEMON_THREADS),

.check_multi_interp_extensions = FLAG(MULTI_INTERP_EXTENSIONS),

#undef FLAG

.gil = interp->ceval.own_gil

? PyInterpreterConfig_OWN_GIL

: PyInterpreterConfig_SHARED_GIL,

};

return 0;

}

cpython/Python/interpconfig.c at main · python/cpython · GitHub

Uh oh!

Uh oh!

cpython/Python/interpconfig.c at main · python/cpython · GitHub

Uh oh!

Uh oh!

Expand file tree

Breadcrumbs

interpconfig.c

Latest commit

History

Breadcrumbs

interpconfig.c

File metadata and controls