cpython/Python/thread.c at 2e0744955f1c213a55738de848a9d928b78ef289 · python/cpython · GitHub

History

196 lines (165 loc) · 4.63 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

/* Thread package.

This is intended to be usable independently from Python.

The implementation for system foobar is in a file thread_foobar.h

which is included by this file dependent on config settings.

Stuff shared by all thread_*.h files is collected here. */

#include "Python.h"

#include "pycore_pystate.h" // _PyInterpreterState_GET()

#include "pycore_structseq.h" // _PyStructSequence_FiniBuiltin()

#include "pycore_pythread.h"

#ifndef DONT_HAVE_STDIO_H

#include <stdio.h>

#endif

#include <stdlib.h>

static void PyThread__init_thread(void); /* Forward */

#define initialized _PyRuntime.threads.initialized

void

PyThread_init_thread(void)

{

if (initialized) {

return;

}

initialized = 1;

PyThread__init_thread();

}

#if defined(HAVE_PTHREAD_STUBS)

# define PYTHREAD_NAME "pthread-stubs"

# include "thread_pthread_stubs.h"

#elif defined(_USE_PTHREADS) /* AKA _PTHREADS */

# if defined(__EMSCRIPTEN__) && !defined(__EMSCRIPTEN_PTHREADS__)

# define PYTHREAD_NAME "pthread-stubs"

# else

# define PYTHREAD_NAME "pthread"

# endif

# include "thread_pthread.h"

#elif defined(NT_THREADS)

# define PYTHREAD_NAME "nt"

# include "thread_nt.h"

#else

# error "Require native threads. See https://bugs.python.org/issue31370"

#endif

/* return the current thread stack size */

size_t

PyThread_get_stacksize(void)

{

return _PyInterpreterState_GET()->threads.stacksize;

}

/* Only platforms defining a THREAD_SET_STACKSIZE() macro

in thread_<platform>.h support changing the stack size.

Return 0 if stack size is valid,

-1 if stack size value is invalid,

-2 if setting stack size is not supported. */

int

PyThread_set_stacksize(size_t size)

{

#if defined(THREAD_SET_STACKSIZE)

return THREAD_SET_STACKSIZE(size);

#else

return -2;

#endif

}

/* Thread Specific Storage (TSS) API

Cross-platform components of TSS API implementation.

Py_tss_t *

PyThread_tss_alloc(void)

{

Py_tss_t *new_key = (Py_tss_t *)PyMem_RawMalloc(sizeof(Py_tss_t));

if (new_key == NULL) {

return NULL;

}

new_key->_is_initialized = 0;

return new_key;

}

void

PyThread_tss_free(Py_tss_t *key)

{

if (key != NULL) {

PyThread_tss_delete(key);

PyMem_RawFree((void *)key);

}

int

PyThread_tss_is_created(Py_tss_t *key)

{

assert(key != NULL);

return key->_is_initialized;

}

PyDoc_STRVAR(threadinfo__doc__,

"sys.thread_info\n\

\n\

A named tuple holding information about the thread implementation.");

static PyStructSequence_Field threadinfo_fields[] = {

{"name", "name of the thread implementation"},

{"lock", "name of the lock implementation"},

{"version", "name and version of the thread library"},

{0}

};

static PyStructSequence_Desc threadinfo_desc = {

"sys.thread_info", /* name */

threadinfo__doc__, /* doc */

threadinfo_fields, /* fields */

};

static PyTypeObject ThreadInfoType;

PyObject*

PyThread_GetInfo(void)

{

PyObject *threadinfo, *value;

int pos = 0;

#if (defined(_POSIX_THREADS) && defined(HAVE_CONFSTR) \

&& defined(_CS_GNU_LIBPTHREAD_VERSION))

char buffer[255];

int len;

#endif

PyInterpreterState *interp = _PyInterpreterState_GET();

if (_PyStructSequence_InitBuiltin(interp, &ThreadInfoType, &threadinfo_desc) < 0) {

return NULL;

}

threadinfo = PyStructSequence_New(&ThreadInfoType);

if (threadinfo == NULL)

return NULL;

value = PyUnicode_FromString(PYTHREAD_NAME);

if (value == NULL) {

Py_DECREF(threadinfo);

return NULL;

}

PyStructSequence_SET_ITEM(threadinfo, pos++, value);

#ifdef HAVE_PTHREAD_STUBS

value = Py_NewRef(Py_None);

#elif defined(_POSIX_THREADS)

#ifdef USE_SEMAPHORES

value = PyUnicode_FromString("semaphore");

#else

value = PyUnicode_FromString("mutex+cond");

#endif

if (value == NULL) {

Py_DECREF(threadinfo);

return NULL;

}

#else

value = Py_NewRef(Py_None);

#endif

PyStructSequence_SET_ITEM(threadinfo, pos++, value);

#if (defined(_POSIX_THREADS) && defined(HAVE_CONFSTR) \

&& defined(_CS_GNU_LIBPTHREAD_VERSION))

value = NULL;

len = confstr(_CS_GNU_LIBPTHREAD_VERSION, buffer, sizeof(buffer));

if (1 < len && (size_t)len < sizeof(buffer)) {

value = PyUnicode_DecodeFSDefaultAndSize(buffer, len-1);

if (value == NULL)

PyErr_Clear();

}

if (value == NULL)

#endif

{

value = Py_NewRef(Py_None);

}

PyStructSequence_SET_ITEM(threadinfo, pos++, value);

return threadinfo;

}

void

_PyThread_FiniType(PyInterpreterState *interp)

{

_PyStructSequence_FiniBuiltin(interp, &ThreadInfoType);

}

cpython/Python/thread.c at 2e0744955f1c213a55738de848a9d928b78ef289 · python/cpython · GitHub

Uh oh!

Expand file tree

Breadcrumbs

thread.c

Latest commit

History

Breadcrumbs

thread.c

File metadata and controls