bpo-25658: Implement PEP 539 for Thread Specific Storage (TSS) API (GH-1362)
See PEP 539 for details. Highlights of changes: - Add Thread Specific Storage (TSS) API - Document the Thread Local Storage (TLS) API as deprecated - Update code that used TLS API to use TSS API
This commit is contained in:
Masayuki Yamamoto
Nick Coghlan
parent
b8ab9d3fc8
commit
731e189014
|
|
@ -1192,3 +1192,160 @@ These functions are only intended to be used by advanced debugging tools.
|
|||
Return the next thread state object after *tstate* from the list of all such
|
||||
objects belonging to the same :c:type:`PyInterpreterState` object.
|
||||
|
||||
|
||||
.. _thread-local-storage:
|
||||
|
||||
Thread Local Storage Support
|
||||
============================
|
||||
|
||||
.. sectionauthor:: Masayuki Yamamoto <ma3yuki.8mamo10@gmail.com>
|
||||
|
||||
The Python interpreter provides low-level support for thread-local storage
|
||||
(TLS) which wraps the underlying native TLS implementation to support the
|
||||
Python-level thread local storage API (:class:`threading.local`). The
|
||||
CPython C level APIs are similar to those offered by pthreads and Windows:
|
||||
use a thread key and functions to associate a :c:type:`void\*` value per
|
||||
thread.
|
||||
|
||||
The GIL does *not* need to be held when calling these functions; they supply
|
||||
their own locking.
|
||||
|
||||
Note that :file:`Python.h` does not include the declaration of the TLS APIs,
|
||||
you need to include :file:`pythread.h` to use thread-local storage.
|
||||
|
||||
.. note::
|
||||
None of these API functions handle memory management on behalf of the
|
||||
:c:type:`void\*` values. You need to allocate and deallocate them yourself.
|
||||
If the :c:type:`void\*` values happen to be :c:type:`PyObject\*`, these
|
||||
functions don't do refcount operations on them either.
|
||||
|
||||
.. _thread-specific-storage-api:
|
||||
|
||||
Thread Specific Storage (TSS) API
|
||||
---------------------------------
|
||||
|
||||
TSS API is introduced to supersede the use of the existing TLS API within the
|
||||
CPython interpreter. This API uses a new type :c:type:`Py_tss_t` instead of
|
||||
:c:type:`int` to represent thread keys.
|
||||
|
||||
.. versionadded:: 3.7
|
||||
|
||||
.. seealso:: "A New C-API for Thread-Local Storage in CPython" (:pep:`539`)
|
||||
|
||||
|
||||
.. c:type:: Py_tss_t
|
||||
|
||||
This data structure represents the state of a thread key, the definition of
|
||||
which may depend on the underlying TLS implementation, and it has an
|
||||
internal field representing the key's initialization state. There are no
|
||||
public members in this structure.
|
||||
|
||||
When :ref:`Py_LIMITED_API <stable>` is not defined, static allocation of
|
||||
this type by :c:macro:`Py_tss_NEEDS_INIT` is allowed.
|
||||
|
||||
|
||||
.. c:macro:: Py_tss_NEEDS_INIT
|
||||
|
||||
This macro expands to the default value for :c:type:`Py_tss_t` variables.
|
||||
Note that this macro won't be defined with :ref:`Py_LIMITED_API <stable>`.
|
||||
|
||||
|
||||
Dynamic Allocation
|
||||
~~~~~~~~~~~~~~~~~~
|
||||
|
||||
Dynamic allocation of the :c:type:`Py_tss_t`, required in extension modules
|
||||
built with :ref:`Py_LIMITED_API <stable>`, where static allocation of this type
|
||||
is not possible due to its implementation being opaque at build time.
|
||||
|
||||
|
||||
.. c:function:: Py_tss_t* PyThread_tss_alloc()
|
||||
|
||||
Return a value which is the same state as a value initialized with
|
||||
:c:macro:`Py_tss_NEEDS_INIT`, or *NULL* in the case of dynamic allocation
|
||||
failure.
|
||||
|
||||
|
||||
.. c:function:: void PyThread_tss_free(Py_tss_t *key)
|
||||
|
||||
Free the given *key* allocated by :c:func:`PyThread_tss_alloc`, after
|
||||
first calling :c:func:`PyThread_tss_delete` to ensure any associated
|
||||
thread locals have been unassigned. This is a no-op if the *key*
|
||||
argument is `NULL`.
|
||||
|
||||
.. note::
|
||||
A freed key becomes a dangling pointer, you should reset the key to
|
||||
`NULL`.
|
||||
|
||||
|
||||
Methods
|
||||
~~~~~~~
|
||||
|
||||
The parameter *key* of these functions must not be *NULL*. Moreover, the
|
||||
behaviors of :c:func:`PyThread_tss_set` and :c:func:`PyThread_tss_get` are
|
||||
undefined if the given :c:type:`Py_tss_t` has not been initialized by
|
||||
:c:func:`PyThread_tss_create`.
|
||||
|
||||
|
||||
.. c:function:: int PyThread_tss_is_created(Py_tss_t *key)
|
||||
|
||||
Return a non-zero value if the given :c:type:`Py_tss_t` has been initialized
|
||||
by :c:func:`PyThread_tss_create`.
|
||||
|
||||
|
||||
.. c:function:: int PyThread_tss_create(Py_tss_t *key)
|
||||
|
||||
Return a zero value on successful initialization of a TSS key. The behavior
|
||||
is undefined if the value pointed to by the *key* argument is not
|
||||
initialized by :c:macro:`Py_tss_NEEDS_INIT`. This function can be called
|
||||
repeatedly on the same key -- calling it on an already initialized key is a
|
||||
no-op and immediately returns success.
|
||||
|
||||
|
||||
.. c:function:: void PyThread_tss_delete(Py_tss_t *key)
|
||||
|
||||
Destroy a TSS key to forget the values associated with the key across all
|
||||
threads, and change the key's initialization state to uninitialized. A
|
||||
destroyed key is able to be initialized again by
|
||||
:c:func:`PyThread_tss_create`. This function can be called repeatedly on
|
||||
the same key -- calling it on an already destroyed key is a no-op.
|
||||
|
||||
|
||||
.. c:function:: int PyThread_tss_set(Py_tss_t *key, void *value)
|
||||
|
||||
Return a zero value to indicate successfully associating a :c:type:`void\*`
|
||||
value with a TSS key in the current thread. Each thread has a distinct
|
||||
mapping of the key to a :c:type:`void\*` value.
|
||||
|
||||
|
||||
.. c:function:: void* PyThread_tss_get(Py_tss_t *key)
|
||||
|
||||
Return the :c:type:`void\*` value associated with a TSS key in the current
|
||||
thread. This returns *NULL* if no value is associated with the key in the
|
||||
current thread.
|
||||
|
||||
|
||||
.. _thread-local-storage-api:
|
||||
|
||||
Thread Local Storage (TLS) API
|
||||
------------------------------
|
||||
|
||||
.. deprecated:: 3.7
|
||||
This API is superseded by
|
||||
:ref:`Thread Specific Storage (TSS) API <thread-specific-storage-api>`.
|
||||
|
||||
.. note::
|
||||
This version of the API does not support platforms where the native TLS key
|
||||
is defined in a way that cannot be safely cast to ``int``. On such platforms,
|
||||
:c:func:`PyThread_create_key` will return immediately with a failure status,
|
||||
and the other TLS functions will all be no-ops on such platforms.
|
||||
|
||||
Due to the compatibility problem noted above, this version of the API should not
|
||||
be used in new code.
|
||||
|
||||
.. c:function:: int PyThread_create_key()
|
||||
.. c:function:: void PyThread_delete_key(int key)
|
||||
.. c:function:: int PyThread_set_key_value(int key, void *value)
|
||||
.. c:function:: void* PyThread_get_key_value(int key)
|
||||
.. c:function:: void PyThread_delete_key_value(int key)
|
||||
.. c:function:: void PyThread_ReInitTLS()
|
||||
|
||||
|
|
|
|||
|
|
@ -127,6 +127,38 @@ built-in ``breakpoint()``.
|
|||
PEP written and implemented by Barry Warsaw
|
||||
|
||||
|
||||
.. _whatsnew37-pep539:
|
||||
|
||||
PEP 539: A New C-API for Thread-Local Storage in CPython
|
||||
--------------------------------------------------------
|
||||
|
||||
While Python provides a C API for thread-local storage support; the existing
|
||||
:ref:`Thread Local Storage (TLS) API <thread-local-storage-api>` has used
|
||||
:c:type:`int` to represent TLS keys across all platforms. This has not
|
||||
generally been a problem for officially-support platforms, but that is neither
|
||||
POSIX-compliant, nor portable in any practical sense.
|
||||
|
||||
:pep:`539` changes this by providing a new :ref:`Thread Specific Storage (TSS)
|
||||
API <thread-specific-storage-api>` to CPython which supersedes use of the
|
||||
existing TLS API within the CPython interpreter, while deprecating the existing
|
||||
API. The TSS API uses a new type :c:type:`Py_tss_t` instead of :c:type:`int`
|
||||
to represent TSS keys--an opaque type the definition of which may depend on
|
||||
the underlying TLS implementation. Therefore, this will allow to build CPython
|
||||
on platforms where the native TLS key is defined in a way that cannot be safely
|
||||
cast to :c:type:`int`.
|
||||
|
||||
Note that on platforms where the native TLS key is defined in a way that cannot
|
||||
be safely cast to :c:type:`int`, all functions of the existing TLS API will be
|
||||
no-op and immediately return failure. This indicates clearly that the old API
|
||||
is not supported on platforms where it cannot be used reliably, and that no
|
||||
effort will be made to add such support.
|
||||
|
||||
.. seealso::
|
||||
|
||||
:pep:`539` -- A New C-API for Thread-Local Storage in CPython
|
||||
PEP written by Erik M. Bray; implementation by Masayuki Yamamoto.
|
||||
|
||||
|
||||
Other Language Changes
|
||||
======================
|
||||
|
||||
|
|
|
|||
|
|
@ -26,7 +26,7 @@ struct _gilstate_runtime_state {
|
|||
*/
|
||||
/* TODO: Given interp_main, it may be possible to kill this ref */
|
||||
PyInterpreterState *autoInterpreterState;
|
||||
int autoTLSkey;
|
||||
Py_tss_t autoTSSkey;
|
||||
};
|
||||
|
||||
/* hook for PyEval_GetFrame(), requested for Psyco */
|
||||
|
|
|
|||
|
|
@ -29,8 +29,8 @@ PyAPI_FUNC(unsigned long) PyThread_get_thread_ident(void);
|
|||
PyAPI_FUNC(PyThread_type_lock) PyThread_allocate_lock(void);
|
||||
PyAPI_FUNC(void) PyThread_free_lock(PyThread_type_lock);
|
||||
PyAPI_FUNC(int) PyThread_acquire_lock(PyThread_type_lock, int);
|
||||
#define WAIT_LOCK 1
|
||||
#define NOWAIT_LOCK 0
|
||||
#define WAIT_LOCK 1
|
||||
#define NOWAIT_LOCK 0
|
||||
|
||||
/* PY_TIMEOUT_T is the integral type used to specify timeouts when waiting
|
||||
on a lock (see PyThread_acquire_lock_timed() below).
|
||||
|
|
@ -77,15 +77,69 @@ PyAPI_FUNC(int) PyThread_set_stacksize(size_t);
|
|||
PyAPI_FUNC(PyObject*) PyThread_GetInfo(void);
|
||||
#endif
|
||||
|
||||
/* Thread Local Storage (TLS) API */
|
||||
PyAPI_FUNC(int) PyThread_create_key(void);
|
||||
PyAPI_FUNC(void) PyThread_delete_key(int);
|
||||
PyAPI_FUNC(int) PyThread_set_key_value(int, void *);
|
||||
PyAPI_FUNC(void *) PyThread_get_key_value(int);
|
||||
PyAPI_FUNC(void) PyThread_delete_key_value(int key);
|
||||
|
||||
/* Thread Local Storage (TLS) API
|
||||
TLS API is DEPRECATED. Use Thread Specific Storage (TSS) API.
|
||||
|
||||
The existing TLS API has used int to represent TLS keys across all
|
||||
platforms, but it is not POSIX-compliant. Therefore, the new TSS API uses
|
||||
opaque data type to represent TSS keys to be compatible (see PEP 539).
|
||||
*/
|
||||
PyAPI_FUNC(int) PyThread_create_key(void) Py_DEPRECATED(3.7);
|
||||
PyAPI_FUNC(void) PyThread_delete_key(int key) Py_DEPRECATED(3.7);
|
||||
PyAPI_FUNC(int) PyThread_set_key_value(int key, void *value) Py_DEPRECATED(3.7);
|
||||
PyAPI_FUNC(void *) PyThread_get_key_value(int key) Py_DEPRECATED(3.7);
|
||||
PyAPI_FUNC(void) PyThread_delete_key_value(int key) Py_DEPRECATED(3.7);
|
||||
|
||||
/* Cleanup after a fork */
|
||||
PyAPI_FUNC(void) PyThread_ReInitTLS(void);
|
||||
PyAPI_FUNC(void) PyThread_ReInitTLS(void) Py_DEPRECATED(3.7);
|
||||
|
||||
|
||||
#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x03070000
|
||||
/* New in 3.7 */
|
||||
/* Thread Specific Storage (TSS) API */
|
||||
|
||||
typedef struct _Py_tss_t Py_tss_t; /* opaque */
|
||||
|
||||
#ifndef Py_LIMITED_API
|
||||
#if defined(_POSIX_THREADS)
|
||||
/* Darwin needs pthread.h to know type name the pthread_key_t. */
|
||||
# include <pthread.h>
|
||||
# define NATIVE_TSS_KEY_T pthread_key_t
|
||||
#elif defined(NT_THREADS)
|
||||
/* In Windows, native TSS key type is DWORD,
|
||||
but hardcode the unsigned long to avoid errors for include directive.
|
||||
*/
|
||||
# define NATIVE_TSS_KEY_T unsigned long
|
||||
#else
|
||||
# error "Require native threads. See https://bugs.python.org/issue31370"
|
||||
#endif
|
||||
|
||||
/* When Py_LIMITED_API is not defined, the type layout of Py_tss_t is
|
||||
exposed to allow static allocation in the API clients. Even in this case,
|
||||
you must handle TSS keys through API functions due to compatibility.
|
||||
*/
|
||||
struct _Py_tss_t {
|
||||
int _is_initialized;
|
||||
NATIVE_TSS_KEY_T _key;
|
||||
};
|
||||
|
||||
#undef NATIVE_TSS_KEY_T
|
||||
|
||||
/* When static allocation, you must initialize with Py_tss_NEEDS_INIT. */
|
||||
#define Py_tss_NEEDS_INIT {0}
|
||||
#endif /* !Py_LIMITED_API */
|
||||
|
||||
PyAPI_FUNC(Py_tss_t *) PyThread_tss_alloc(void);
|
||||
PyAPI_FUNC(void) PyThread_tss_free(Py_tss_t *key);
|
||||
|
||||
/* The parameter key must not be NULL. */
|
||||
PyAPI_FUNC(int) PyThread_tss_is_created(Py_tss_t *key);
|
||||
PyAPI_FUNC(int) PyThread_tss_create(Py_tss_t *key);
|
||||
PyAPI_FUNC(void) PyThread_tss_delete(Py_tss_t *key);
|
||||
PyAPI_FUNC(int) PyThread_tss_set(Py_tss_t *key, void *value);
|
||||
PyAPI_FUNC(void *) PyThread_tss_get(Py_tss_t *key);
|
||||
#endif /* New in 3.7 */
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
|
|
|
|||
|
|
@ -0,0 +1,4 @@
|
|||
Implement PEP 539 for Thread Specific Stroage (TSS) API: it is a new Thread
|
||||
Local Storage (TLS) API to CPython which would supersede use of the existing
|
||||
TLS API within the CPython interpreter, while deprecating the existing API.
|
||||
PEP written by Erik M. Bray, patch by Masayuki Yamamoto.
|
||||
|
|
@ -4306,6 +4306,61 @@ py_w_stopcode(PyObject *self, PyObject *args)
|
|||
#endif
|
||||
|
||||
|
||||
static PyObject *
|
||||
test_pythread_tss_key_state(PyObject *self, PyObject *args)
|
||||
{
|
||||
Py_tss_t tss_key = Py_tss_NEEDS_INIT;
|
||||
if (PyThread_tss_is_created(&tss_key)) {
|
||||
return raiseTestError("test_pythread_tss_key_state",
|
||||
"TSS key not in an uninitialized state at "
|
||||
"creation time");
|
||||
}
|
||||
if (PyThread_tss_create(&tss_key) != 0) {
|
||||
PyErr_SetString(PyExc_RuntimeError, "PyThread_tss_create failed");
|
||||
return NULL;
|
||||
}
|
||||
if (!PyThread_tss_is_created(&tss_key)) {
|
||||
return raiseTestError("test_pythread_tss_key_state",
|
||||
"PyThread_tss_create succeeded, "
|
||||
"but with TSS key in an uninitialized state");
|
||||
}
|
||||
if (PyThread_tss_create(&tss_key) != 0) {
|
||||
return raiseTestError("test_pythread_tss_key_state",
|
||||
"PyThread_tss_create unsuccessful with "
|
||||
"an already initialized key");
|
||||
}
|
||||
#define CHECK_TSS_API(expr) \
|
||||
(void)(expr); \
|
||||
if (!PyThread_tss_is_created(&tss_key)) { \
|
||||
return raiseTestError("test_pythread_tss_key_state", \
|
||||
"TSS key initialization state was not " \
|
||||
"preserved after calling " #expr); }
|
||||
CHECK_TSS_API(PyThread_tss_set(&tss_key, NULL));
|
||||
CHECK_TSS_API(PyThread_tss_get(&tss_key));
|
||||
#undef CHECK_TSS_API
|
||||
PyThread_tss_delete(&tss_key);
|
||||
if (PyThread_tss_is_created(&tss_key)) {
|
||||
return raiseTestError("test_pythread_tss_key_state",
|
||||
"PyThread_tss_delete called, but did not "
|
||||
"set the key state to uninitialized");
|
||||
}
|
||||
|
||||
Py_tss_t *ptr_key = PyThread_tss_alloc();
|
||||
if (ptr_key == NULL) {
|
||||
PyErr_SetString(PyExc_RuntimeError, "PyThread_tss_alloc failed");
|
||||
return NULL;
|
||||
}
|
||||
if (PyThread_tss_is_created(ptr_key)) {
|
||||
return raiseTestError("test_pythread_tss_key_state",
|
||||
"TSS key not in an uninitialized state at "
|
||||
"allocation time");
|
||||
}
|
||||
PyThread_tss_free(ptr_key);
|
||||
ptr_key = NULL;
|
||||
Py_RETURN_NONE;
|
||||
}
|
||||
|
||||
|
||||
static PyMethodDef TestMethods[] = {
|
||||
{"raise_exception", raise_exception, METH_VARARGS},
|
||||
{"raise_memoryerror", (PyCFunction)raise_memoryerror, METH_NOARGS},
|
||||
|
|
@ -4518,6 +4573,7 @@ static PyMethodDef TestMethods[] = {
|
|||
#ifdef W_STOPCODE
|
||||
{"W_STOPCODE", py_w_stopcode, METH_VARARGS},
|
||||
#endif
|
||||
{"test_pythread_tss_key_state", test_pythread_tss_key_state, METH_VARARGS},
|
||||
{NULL, NULL} /* sentinel */
|
||||
};
|
||||
|
||||
|
|
|
|||
|
|
@ -167,14 +167,7 @@ tracemalloc_error(const char *format, ...)
|
|||
#if defined(TRACE_RAW_MALLOC)
|
||||
#define REENTRANT_THREADLOCAL
|
||||
|
||||
/* If your OS does not provide native thread local storage, you can implement
|
||||
it manually using a lock. Functions of thread.c cannot be used because
|
||||
they use PyMem_RawMalloc() which leads to a reentrant call. */
|
||||
#if !(defined(_POSIX_THREADS) || defined(NT_THREADS))
|
||||
# error "need native thread local storage (TLS)"
|
||||
#endif
|
||||
|
||||
static int tracemalloc_reentrant_key = -1;
|
||||
static Py_tss_t tracemalloc_reentrant_key = Py_tss_NEEDS_INIT;
|
||||
|
||||
/* Any non-NULL pointer can be used */
|
||||
#define REENTRANT Py_True
|
||||
|
|
@ -184,8 +177,8 @@ get_reentrant(void)
|
|||
{
|
||||
void *ptr;
|
||||
|
||||
assert(tracemalloc_reentrant_key != -1);
|
||||
ptr = PyThread_get_key_value(tracemalloc_reentrant_key);
|
||||
assert(PyThread_tss_is_created(&tracemalloc_reentrant_key));
|
||||
ptr = PyThread_tss_get(&tracemalloc_reentrant_key);
|
||||
if (ptr != NULL) {
|
||||
assert(ptr == REENTRANT);
|
||||
return 1;
|
||||
|
|
@ -198,15 +191,15 @@ static void
|
|||
set_reentrant(int reentrant)
|
||||
{
|
||||
assert(reentrant == 0 || reentrant == 1);
|
||||
assert(tracemalloc_reentrant_key != -1);
|
||||
assert(PyThread_tss_is_created(&tracemalloc_reentrant_key));
|
||||
|
||||
if (reentrant) {
|
||||
assert(!get_reentrant());
|
||||
PyThread_set_key_value(tracemalloc_reentrant_key, REENTRANT);
|
||||
PyThread_tss_set(&tracemalloc_reentrant_key, REENTRANT);
|
||||
}
|
||||
else {
|
||||
assert(get_reentrant());
|
||||
PyThread_set_key_value(tracemalloc_reentrant_key, NULL);
|
||||
PyThread_tss_set(&tracemalloc_reentrant_key, NULL);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -975,8 +968,7 @@ tracemalloc_init(void)
|
|||
PyMem_GetAllocator(PYMEM_DOMAIN_RAW, &allocators.raw);
|
||||
|
||||
#ifdef REENTRANT_THREADLOCAL
|
||||
tracemalloc_reentrant_key = PyThread_create_key();
|
||||
if (tracemalloc_reentrant_key == -1) {
|
||||
if (PyThread_tss_create(&tracemalloc_reentrant_key) != 0) {
|
||||
#ifdef MS_WINDOWS
|
||||
PyErr_SetFromWindowsErr(0);
|
||||
#else
|
||||
|
|
@ -1061,8 +1053,7 @@ tracemalloc_deinit(void)
|
|||
#endif
|
||||
|
||||
#ifdef REENTRANT_THREADLOCAL
|
||||
PyThread_delete_key(tracemalloc_reentrant_key);
|
||||
tracemalloc_reentrant_key = -1;
|
||||
PyThread_tss_delete(&tracemalloc_reentrant_key);
|
||||
#endif
|
||||
|
||||
Py_XDECREF(unknown_filename);
|
||||
|
|
|
|||
|
|
@ -232,7 +232,7 @@ faulthandler_dump_traceback(int fd, int all_threads,
|
|||
|
||||
PyThreadState_Get() doesn't give the state of the thread that caused the
|
||||
fault if the thread released the GIL, and so this function cannot be
|
||||
used. Read the thread local storage (TLS) instead: call
|
||||
used. Read the thread specific storage (TSS) instead: call
|
||||
PyGILState_GetThisThreadState(). */
|
||||
tstate = PyGILState_GetThisThreadState();
|
||||
|
||||
|
|
|
|||
|
|
@ -454,9 +454,6 @@ PyOS_AfterFork_Parent(void)
|
|||
void
|
||||
PyOS_AfterFork_Child(void)
|
||||
{
|
||||
/* PyThread_ReInitTLS() must be called early, to make sure that the TLS API
|
||||
* can be called safely. */
|
||||
PyThread_ReInitTLS();
|
||||
_PyGILState_Reinit();
|
||||
PyEval_ReInitThreads();
|
||||
_PyImport_ReInitLock();
|
||||
|
|
|
|||
|
|
@ -570,6 +570,13 @@ EXPORTS
|
|||
PyThreadState_New=python37.PyThreadState_New
|
||||
PyThreadState_SetAsyncExc=python37.PyThreadState_SetAsyncExc
|
||||
PyThreadState_Swap=python37.PyThreadState_Swap
|
||||
PyThread_tss_alloc=python37.PyThread_tss_alloc
|
||||
PyThread_tss_create=python37.PyThread_tss_create
|
||||
PyThread_tss_delete=python37.PyThread_tss_delete
|
||||
PyThread_tss_free=python37.PyThread_tss_free
|
||||
PyThread_tss_get=python37.PyThread_tss_get
|
||||
PyThread_tss_is_created=python37.PyThread_tss_is_created
|
||||
PyThread_tss_set=python37.PyThread_tss_set
|
||||
PyTraceBack_Here=python37.PyTraceBack_Here
|
||||
PyTraceBack_Print=python37.PyTraceBack_Print
|
||||
PyTraceBack_Type=python37.PyTraceBack_Type DATA
|
||||
|
|
|
|||
|
|
@ -46,7 +46,12 @@ _PyRuntimeState_Init(_PyRuntimeState *runtime)
|
|||
_PyEval_Initialize(&runtime->ceval);
|
||||
|
||||
runtime->gilstate.check_enabled = 1;
|
||||
runtime->gilstate.autoTLSkey = -1;
|
||||
/* A TSS key must be initialized with Py_tss_NEEDS_INIT
|
||||
in accordance with the specification. */
|
||||
{
|
||||
Py_tss_t initial = Py_tss_NEEDS_INIT;
|
||||
runtime->gilstate.autoTSSkey = initial;
|
||||
}
|
||||
|
||||
runtime->interpreters.mutex = PyThread_allocate_lock();
|
||||
if (runtime->interpreters.mutex == NULL)
|
||||
|
|
@ -485,9 +490,9 @@ PyThreadState_Delete(PyThreadState *tstate)
|
|||
if (tstate == GET_TSTATE())
|
||||
Py_FatalError("PyThreadState_Delete: tstate is still current");
|
||||
if (_PyRuntime.gilstate.autoInterpreterState &&
|
||||
PyThread_get_key_value(_PyRuntime.gilstate.autoTLSkey) == tstate)
|
||||
PyThread_tss_get(&_PyRuntime.gilstate.autoTSSkey) == tstate)
|
||||
{
|
||||
PyThread_delete_key_value(_PyRuntime.gilstate.autoTLSkey);
|
||||
PyThread_tss_set(&_PyRuntime.gilstate.autoTSSkey, NULL);
|
||||
}
|
||||
tstate_delete_common(tstate);
|
||||
}
|
||||
|
|
@ -502,9 +507,9 @@ PyThreadState_DeleteCurrent()
|
|||
"PyThreadState_DeleteCurrent: no current tstate");
|
||||
tstate_delete_common(tstate);
|
||||
if (_PyRuntime.gilstate.autoInterpreterState &&
|
||||
PyThread_get_key_value(_PyRuntime.gilstate.autoTLSkey) == tstate)
|
||||
PyThread_tss_get(&_PyRuntime.gilstate.autoTSSkey) == tstate)
|
||||
{
|
||||
PyThread_delete_key_value(_PyRuntime.gilstate.autoTLSkey);
|
||||
PyThread_tss_set(&_PyRuntime.gilstate.autoTSSkey, NULL);
|
||||
}
|
||||
SET_TSTATE(NULL);
|
||||
PyEval_ReleaseLock();
|
||||
|
|
@ -761,11 +766,11 @@ void
|
|||
_PyGILState_Init(PyInterpreterState *i, PyThreadState *t)
|
||||
{
|
||||
assert(i && t); /* must init with valid states */
|
||||
_PyRuntime.gilstate.autoTLSkey = PyThread_create_key();
|
||||
if (_PyRuntime.gilstate.autoTLSkey == -1)
|
||||
Py_FatalError("Could not allocate TLS entry");
|
||||
if (PyThread_tss_create(&_PyRuntime.gilstate.autoTSSkey) != 0) {
|
||||
Py_FatalError("Could not allocate TSS entry");
|
||||
}
|
||||
_PyRuntime.gilstate.autoInterpreterState = i;
|
||||
assert(PyThread_get_key_value(_PyRuntime.gilstate.autoTLSkey) == NULL);
|
||||
assert(PyThread_tss_get(&_PyRuntime.gilstate.autoTSSkey) == NULL);
|
||||
assert(t->gilstate_counter == 0);
|
||||
|
||||
_PyGILState_NoteThreadState(t);
|
||||
|
|
@ -780,14 +785,13 @@ _PyGILState_GetInterpreterStateUnsafe(void)
|
|||
void
|
||||
_PyGILState_Fini(void)
|
||||
{
|
||||
PyThread_delete_key(_PyRuntime.gilstate.autoTLSkey);
|
||||
_PyRuntime.gilstate.autoTLSkey = -1;
|
||||
PyThread_tss_delete(&_PyRuntime.gilstate.autoTSSkey);
|
||||
_PyRuntime.gilstate.autoInterpreterState = NULL;
|
||||
}
|
||||
|
||||
/* Reset the TLS key - called by PyOS_AfterFork_Child().
|
||||
/* Reset the TSS key - called by PyOS_AfterFork_Child().
|
||||
* This should not be necessary, but some - buggy - pthread implementations
|
||||
* don't reset TLS upon fork(), see issue #10517.
|
||||
* don't reset TSS upon fork(), see issue #10517.
|
||||
*/
|
||||
void
|
||||
_PyGILState_Reinit(void)
|
||||
|
|
@ -796,15 +800,18 @@ _PyGILState_Reinit(void)
|
|||
if (_PyRuntime.interpreters.mutex == NULL)
|
||||
Py_FatalError("Can't initialize threads for interpreter");
|
||||
PyThreadState *tstate = PyGILState_GetThisThreadState();
|
||||
PyThread_delete_key(_PyRuntime.gilstate.autoTLSkey);
|
||||
if ((_PyRuntime.gilstate.autoTLSkey = PyThread_create_key()) == -1)
|
||||
Py_FatalError("Could not allocate TLS entry");
|
||||
PyThread_tss_delete(&_PyRuntime.gilstate.autoTSSkey);
|
||||
if (PyThread_tss_create(&_PyRuntime.gilstate.autoTSSkey) != 0) {
|
||||
Py_FatalError("Could not allocate TSS entry");
|
||||
}
|
||||
|
||||
/* If the thread had an associated auto thread state, reassociate it with
|
||||
* the new key. */
|
||||
if (tstate && PyThread_set_key_value(_PyRuntime.gilstate.autoTLSkey,
|
||||
(void *)tstate) < 0)
|
||||
Py_FatalError("Couldn't create autoTLSkey mapping");
|
||||
if (tstate &&
|
||||
PyThread_tss_set(&_PyRuntime.gilstate.autoTSSkey, (void *)tstate) != 0)
|
||||
{
|
||||
Py_FatalError("Couldn't create autoTSSkey mapping");
|
||||
}
|
||||
}
|
||||
|
||||
/* When a thread state is created for a thread by some mechanism other than
|
||||
|
|
@ -815,13 +822,13 @@ _PyGILState_Reinit(void)
|
|||
static void
|
||||
_PyGILState_NoteThreadState(PyThreadState* tstate)
|
||||
{
|
||||
/* If autoTLSkey isn't initialized, this must be the very first
|
||||
/* If autoTSSkey isn't initialized, this must be the very first
|
||||
threadstate created in Py_Initialize(). Don't do anything for now
|
||||
(we'll be back here when _PyGILState_Init is called). */
|
||||
if (!_PyRuntime.gilstate.autoInterpreterState)
|
||||
return;
|
||||
|
||||
/* Stick the thread state for this thread in thread local storage.
|
||||
/* Stick the thread state for this thread in thread specific storage.
|
||||
|
||||
The only situation where you can legitimately have more than one
|
||||
thread state for an OS level thread is when there are multiple
|
||||
|
|
@ -833,12 +840,11 @@ _PyGILState_NoteThreadState(PyThreadState* tstate)
|
|||
The first thread state created for that given OS level thread will
|
||||
"win", which seems reasonable behaviour.
|
||||
*/
|
||||
if (PyThread_get_key_value(_PyRuntime.gilstate.autoTLSkey) == NULL) {
|
||||
if ((PyThread_set_key_value(_PyRuntime.gilstate.autoTLSkey,
|
||||
(void *)tstate)
|
||||
) < 0)
|
||||
if (PyThread_tss_get(&_PyRuntime.gilstate.autoTSSkey) == NULL) {
|
||||
if ((PyThread_tss_set(&_PyRuntime.gilstate.autoTSSkey, (void *)tstate)
|
||||
) != 0)
|
||||
{
|
||||
Py_FatalError("Couldn't create autoTLSkey mapping");
|
||||
Py_FatalError("Couldn't create autoTSSkey mapping");
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -852,8 +858,7 @@ PyGILState_GetThisThreadState(void)
|
|||
{
|
||||
if (_PyRuntime.gilstate.autoInterpreterState == NULL)
|
||||
return NULL;
|
||||
return (PyThreadState *)PyThread_get_key_value(
|
||||
_PyRuntime.gilstate.autoTLSkey);
|
||||
return (PyThreadState *)PyThread_tss_get(&_PyRuntime.gilstate.autoTSSkey);
|
||||
}
|
||||
|
||||
int
|
||||
|
|
@ -864,8 +869,9 @@ PyGILState_Check(void)
|
|||
if (!_PyGILState_check_enabled)
|
||||
return 1;
|
||||
|
||||
if (_PyRuntime.gilstate.autoTLSkey == -1)
|
||||
if (!PyThread_tss_is_created(&_PyRuntime.gilstate.autoTSSkey)) {
|
||||
return 1;
|
||||
}
|
||||
|
||||
tstate = GET_TSTATE();
|
||||
if (tstate == NULL)
|
||||
|
|
@ -886,8 +892,7 @@ PyGILState_Ensure(void)
|
|||
*/
|
||||
/* Py_Initialize() hasn't been called! */
|
||||
assert(_PyRuntime.gilstate.autoInterpreterState);
|
||||
tcur = (PyThreadState *)PyThread_get_key_value(
|
||||
_PyRuntime.gilstate.autoTLSkey);
|
||||
tcur = (PyThreadState *)PyThread_tss_get(&_PyRuntime.gilstate.autoTSSkey);
|
||||
if (tcur == NULL) {
|
||||
/* At startup, Python has no concrete GIL. If PyGILState_Ensure() is
|
||||
called from a new thread for the first time, we need the create the
|
||||
|
|
@ -919,8 +924,8 @@ PyGILState_Ensure(void)
|
|||
void
|
||||
PyGILState_Release(PyGILState_STATE oldstate)
|
||||
{
|
||||
PyThreadState *tcur = (PyThreadState *)PyThread_get_key_value(
|
||||
_PyRuntime.gilstate.autoTLSkey);
|
||||
PyThreadState *tcur = (PyThreadState *)PyThread_tss_get(
|
||||
&_PyRuntime.gilstate.autoTSSkey);
|
||||
if (tcur == NULL)
|
||||
Py_FatalError("auto-releasing thread-state, "
|
||||
"but no thread-state for this thread");
|
||||
|
|
|
|||
|
|
@ -84,7 +84,7 @@ PyThread_init_thread(void)
|
|||
# define PYTHREAD_NAME "nt"
|
||||
# include "thread_nt.h"
|
||||
#else
|
||||
# error "Require native thread feature. See https://bugs.python.org/issue30832"
|
||||
# error "Require native threads. See https://bugs.python.org/issue31370"
|
||||
#endif
|
||||
|
||||
|
||||
|
|
@ -111,41 +111,37 @@ PyThread_set_stacksize(size_t size)
|
|||
}
|
||||
|
||||
|
||||
/* ------------------------------------------------------------------------
|
||||
Per-thread data ("key") support.
|
||||
/* Thread Specific Storage (TSS) API
|
||||
|
||||
Use PyThread_create_key() to create a new key. This is typically shared
|
||||
across threads.
|
||||
Cross-platform components of TSS API implementation.
|
||||
*/
|
||||
|
||||
Use PyThread_set_key_value(thekey, value) to associate void* value with
|
||||
thekey in the current thread. Each thread has a distinct mapping of thekey
|
||||
to a void* value. Caution: if the current thread already has a mapping
|
||||
for thekey, value is ignored.
|
||||
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;
|
||||
}
|
||||
|
||||
Use PyThread_get_key_value(thekey) to retrieve the void* value associated
|
||||
with thekey in the current thread. This returns NULL if no value is
|
||||
associated with thekey in the current thread.
|
||||
void
|
||||
PyThread_tss_free(Py_tss_t *key)
|
||||
{
|
||||
if (key != NULL) {
|
||||
PyThread_tss_delete(key);
|
||||
PyMem_RawFree((void *)key);
|
||||
}
|
||||
}
|
||||
|
||||
Use PyThread_delete_key_value(thekey) to forget the current thread's associated
|
||||
value for thekey. PyThread_delete_key(thekey) forgets the values associated
|
||||
with thekey across *all* threads.
|
||||
|
||||
While some of these functions have error-return values, none set any
|
||||
Python exception.
|
||||
|
||||
None of the functions does memory management on behalf of the void* values.
|
||||
You need to allocate and deallocate them yourself. If the void* values
|
||||
happen to be PyObject*, these functions don't do refcount operations on
|
||||
them either.
|
||||
|
||||
The GIL does not need to be held when calling these functions; they supply
|
||||
their own locking. This isn't true of PyThread_create_key(), though (see
|
||||
next paragraph).
|
||||
|
||||
There's a hidden assumption that PyThread_create_key() will be called before
|
||||
any of the other functions are called. There's also a hidden assumption
|
||||
that calls to PyThread_create_key() are serialized externally.
|
||||
------------------------------------------------------------------------ */
|
||||
int
|
||||
PyThread_tss_is_created(Py_tss_t *key)
|
||||
{
|
||||
assert(key != NULL);
|
||||
return key->_is_initialized;
|
||||
}
|
||||
|
||||
|
||||
PyDoc_STRVAR(threadinfo__doc__,
|
||||
|
|
|
|||
|
|
@ -349,10 +349,15 @@ _pythread_nt_set_stacksize(size_t size)
|
|||
#define THREAD_SET_STACKSIZE(x) _pythread_nt_set_stacksize(x)
|
||||
|
||||
|
||||
/* Thread Local Storage (TLS) API
|
||||
|
||||
This API is DEPRECATED since Python 3.7. See PEP 539 for details.
|
||||
*/
|
||||
|
||||
int
|
||||
PyThread_create_key(void)
|
||||
{
|
||||
DWORD result= TlsAlloc();
|
||||
DWORD result = TlsAlloc();
|
||||
if (result == TLS_OUT_OF_INDEXES)
|
||||
return -1;
|
||||
return (int)result;
|
||||
|
|
@ -367,12 +372,8 @@ PyThread_delete_key(int key)
|
|||
int
|
||||
PyThread_set_key_value(int key, void *value)
|
||||
{
|
||||
BOOL ok;
|
||||
|
||||
ok = TlsSetValue(key, value);
|
||||
if (!ok)
|
||||
return -1;
|
||||
return 0;
|
||||
BOOL ok = TlsSetValue(key, value);
|
||||
return ok ? 0 : -1;
|
||||
}
|
||||
|
||||
void *
|
||||
|
|
@ -399,9 +400,74 @@ PyThread_delete_key_value(int key)
|
|||
TlsSetValue(key, NULL);
|
||||
}
|
||||
|
||||
|
||||
/* reinitialization of TLS is not necessary after fork when using
|
||||
* the native TLS functions. And forking isn't supported on Windows either.
|
||||
*/
|
||||
void
|
||||
PyThread_ReInitTLS(void)
|
||||
{}
|
||||
{
|
||||
}
|
||||
|
||||
|
||||
/* Thread Specific Storage (TSS) API
|
||||
|
||||
Platform-specific components of TSS API implementation.
|
||||
*/
|
||||
|
||||
int
|
||||
PyThread_tss_create(Py_tss_t *key)
|
||||
{
|
||||
assert(key != NULL);
|
||||
/* If the key has been created, function is silently skipped. */
|
||||
if (key->_is_initialized) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
DWORD result = TlsAlloc();
|
||||
if (result == TLS_OUT_OF_INDEXES) {
|
||||
return -1;
|
||||
}
|
||||
/* In Windows, platform-specific key type is DWORD. */
|
||||
key->_key = result;
|
||||
key->_is_initialized = 1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
void
|
||||
PyThread_tss_delete(Py_tss_t *key)
|
||||
{
|
||||
assert(key != NULL);
|
||||
/* If the key has not been created, function is silently skipped. */
|
||||
if (!key->_is_initialized) {
|
||||
return;
|
||||
}
|
||||
|
||||
TlsFree(key->_key);
|
||||
key->_key = TLS_OUT_OF_INDEXES;
|
||||
key->_is_initialized = 0;
|
||||
}
|
||||
|
||||
int
|
||||
PyThread_tss_set(Py_tss_t *key, void *value)
|
||||
{
|
||||
assert(key != NULL);
|
||||
BOOL ok = TlsSetValue(key->_key, value);
|
||||
return ok ? 0 : -1;
|
||||
}
|
||||
|
||||
void *
|
||||
PyThread_tss_get(Py_tss_t *key)
|
||||
{
|
||||
assert(key != NULL);
|
||||
/* because TSS is used in the Py_END_ALLOW_THREAD macro,
|
||||
* it is necessary to preserve the windows error state, because
|
||||
* it is assumed to be preserved across the call to the macro.
|
||||
* Ideally, the macro should be fixed, but it is simpler to
|
||||
* do it here.
|
||||
*/
|
||||
DWORD error = GetLastError();
|
||||
void *result = TlsGetValue(key->_key);
|
||||
SetLastError(error);
|
||||
return result;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -589,9 +589,25 @@ _pythread_pthread_set_stacksize(size_t size)
|
|||
#define THREAD_SET_STACKSIZE(x) _pythread_pthread_set_stacksize(x)
|
||||
|
||||
|
||||
/* Thread Local Storage (TLS) API
|
||||
|
||||
This API is DEPRECATED since Python 3.7. See PEP 539 for details.
|
||||
*/
|
||||
|
||||
/* Issue #25658: On platforms where native TLS key is defined in a way that
|
||||
cannot be safely cast to int, PyThread_create_key returns immediately a
|
||||
failure status and other TLS functions all are no-ops. This indicates
|
||||
clearly that the old API is not supported on platforms where it cannot be
|
||||
used reliably, and that no effort will be made to add such support.
|
||||
|
||||
Note: PTHREAD_KEY_T_IS_COMPATIBLE_WITH_INT will be unnecessary after
|
||||
removing this API.
|
||||
*/
|
||||
|
||||
int
|
||||
PyThread_create_key(void)
|
||||
{
|
||||
#ifdef PTHREAD_KEY_T_IS_COMPATIBLE_WITH_INT
|
||||
pthread_key_t key;
|
||||
int fail = pthread_key_create(&key, NULL);
|
||||
if (fail)
|
||||
|
|
@ -603,34 +619,102 @@ PyThread_create_key(void)
|
|||
return -1;
|
||||
}
|
||||
return (int)key;
|
||||
#else
|
||||
return -1; /* never return valid key value. */
|
||||
#endif
|
||||
}
|
||||
|
||||
void
|
||||
PyThread_delete_key(int key)
|
||||
{
|
||||
#ifdef PTHREAD_KEY_T_IS_COMPATIBLE_WITH_INT
|
||||
pthread_key_delete(key);
|
||||
#endif
|
||||
}
|
||||
|
||||
void
|
||||
PyThread_delete_key_value(int key)
|
||||
{
|
||||
#ifdef PTHREAD_KEY_T_IS_COMPATIBLE_WITH_INT
|
||||
pthread_setspecific(key, NULL);
|
||||
#endif
|
||||
}
|
||||
|
||||
int
|
||||
PyThread_set_key_value(int key, void *value)
|
||||
{
|
||||
int fail;
|
||||
fail = pthread_setspecific(key, value);
|
||||
#ifdef PTHREAD_KEY_T_IS_COMPATIBLE_WITH_INT
|
||||
int fail = pthread_setspecific(key, value);
|
||||
return fail ? -1 : 0;
|
||||
#else
|
||||
return -1;
|
||||
#endif
|
||||
}
|
||||
|
||||
void *
|
||||
PyThread_get_key_value(int key)
|
||||
{
|
||||
#ifdef PTHREAD_KEY_T_IS_COMPATIBLE_WITH_INT
|
||||
return pthread_getspecific(key);
|
||||
#else
|
||||
return NULL;
|
||||
#endif
|
||||
}
|
||||
|
||||
|
||||
void
|
||||
PyThread_ReInitTLS(void)
|
||||
{}
|
||||
{
|
||||
}
|
||||
|
||||
|
||||
/* Thread Specific Storage (TSS) API
|
||||
|
||||
Platform-specific components of TSS API implementation.
|
||||
*/
|
||||
|
||||
int
|
||||
PyThread_tss_create(Py_tss_t *key)
|
||||
{
|
||||
assert(key != NULL);
|
||||
/* If the key has been created, function is silently skipped. */
|
||||
if (key->_is_initialized) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
int fail = pthread_key_create(&(key->_key), NULL);
|
||||
if (fail) {
|
||||
return -1;
|
||||
}
|
||||
key->_is_initialized = 1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
void
|
||||
PyThread_tss_delete(Py_tss_t *key)
|
||||
{
|
||||
assert(key != NULL);
|
||||
/* If the key has not been created, function is silently skipped. */
|
||||
if (!key->_is_initialized) {
|
||||
return;
|
||||
}
|
||||
|
||||
pthread_key_delete(key->_key);
|
||||
/* pthread has not provided the defined invalid value for the key. */
|
||||
key->_is_initialized = 0;
|
||||
}
|
||||
|
||||
int
|
||||
PyThread_tss_set(Py_tss_t *key, void *value)
|
||||
{
|
||||
assert(key != NULL);
|
||||
int fail = pthread_setspecific(key->_key, value);
|
||||
return fail ? -1 : 0;
|
||||
}
|
||||
|
||||
void *
|
||||
PyThread_tss_get(Py_tss_t *key)
|
||||
{
|
||||
assert(key != NULL);
|
||||
return pthread_getspecific(key->_key);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -760,7 +760,7 @@ _Py_DumpTracebackThreads(int fd, PyInterpreterState *interp,
|
|||
|
||||
PyThreadState_Get() doesn't give the state of the thread that caused
|
||||
the fault if the thread released the GIL, and so this function
|
||||
cannot be used. Read the thread local storage (TLS) instead: call
|
||||
cannot be used. Read the thread specific storage (TSS) instead: call
|
||||
PyGILState_GetThisThreadState(). */
|
||||
current_tstate = PyGILState_GetThisThreadState();
|
||||
}
|
||||
|
|
|
|||
|
|
@ -8883,6 +8883,75 @@ cat >>confdefs.h <<_ACEOF
|
|||
_ACEOF
|
||||
|
||||
|
||||
fi
|
||||
|
||||
# Issue #25658: POSIX hasn't defined that pthread_key_t is compatible with int.
|
||||
# This checking will be unnecessary after removing deprecated TLS API.
|
||||
# The cast to long int works around a bug in the HP C Compiler
|
||||
# version HP92453-01 B.11.11.23709.GP, which incorrectly rejects
|
||||
# declarations like `int a3[[(sizeof (unsigned char)) >= 0]];'.
|
||||
# This bug is HP SR number 8606223364.
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking size of pthread_key_t" >&5
|
||||
$as_echo_n "checking size of pthread_key_t... " >&6; }
|
||||
if ${ac_cv_sizeof_pthread_key_t+:} false; then :
|
||||
$as_echo_n "(cached) " >&6
|
||||
else
|
||||
if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (pthread_key_t))" "ac_cv_sizeof_pthread_key_t" "#include <pthread.h>
|
||||
"; then :
|
||||
|
||||
else
|
||||
if test "$ac_cv_type_pthread_key_t" = yes; then
|
||||
{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
|
||||
$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
|
||||
as_fn_error 77 "cannot compute sizeof (pthread_key_t)
|
||||
See \`config.log' for more details" "$LINENO" 5; }
|
||||
else
|
||||
ac_cv_sizeof_pthread_key_t=0
|
||||
fi
|
||||
fi
|
||||
|
||||
fi
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sizeof_pthread_key_t" >&5
|
||||
$as_echo "$ac_cv_sizeof_pthread_key_t" >&6; }
|
||||
|
||||
|
||||
|
||||
cat >>confdefs.h <<_ACEOF
|
||||
#define SIZEOF_PTHREAD_KEY_T $ac_cv_sizeof_pthread_key_t
|
||||
_ACEOF
|
||||
|
||||
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether pthread_key_t is compatible with int" >&5
|
||||
$as_echo_n "checking whether pthread_key_t is compatible with int... " >&6; }
|
||||
if test "$ac_cv_sizeof_pthread_key_t" -eq "$ac_cv_sizeof_int" ; then
|
||||
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
|
||||
/* end confdefs.h. */
|
||||
#include <pthread.h>
|
||||
int
|
||||
main ()
|
||||
{
|
||||
pthread_key_t k; k * 1;
|
||||
;
|
||||
return 0;
|
||||
}
|
||||
_ACEOF
|
||||
if ac_fn_c_try_compile "$LINENO"; then :
|
||||
ac_pthread_key_t_is_arithmetic_type=yes
|
||||
else
|
||||
ac_pthread_key_t_is_arithmetic_type=no
|
||||
|
||||
fi
|
||||
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_pthread_key_t_is_arithmetic_type" >&5
|
||||
$as_echo "$ac_pthread_key_t_is_arithmetic_type" >&6; }
|
||||
if test "$ac_pthread_key_t_is_arithmetic_type" = yes ; then
|
||||
|
||||
$as_echo "#define PTHREAD_KEY_T_IS_COMPATIBLE_WITH_INT 1" >>confdefs.h
|
||||
|
||||
fi
|
||||
else
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
|
||||
$as_echo "no" >&6; }
|
||||
fi
|
||||
CC="$ac_save_cc"
|
||||
|
||||
|
|
|
|||
19
configure.ac
19
configure.ac
|
|
@ -2263,6 +2263,25 @@ if test "$have_pthread_t" = yes ; then
|
|||
#endif
|
||||
])
|
||||
fi
|
||||
|
||||
# Issue #25658: POSIX hasn't defined that pthread_key_t is compatible with int.
|
||||
# This checking will be unnecessary after removing deprecated TLS API.
|
||||
AC_CHECK_SIZEOF(pthread_key_t, [], [[#include <pthread.h>]])
|
||||
AC_MSG_CHECKING(whether pthread_key_t is compatible with int)
|
||||
if test "$ac_cv_sizeof_pthread_key_t" -eq "$ac_cv_sizeof_int" ; then
|
||||
AC_COMPILE_IFELSE(
|
||||
[AC_LANG_PROGRAM([[#include <pthread.h>]], [[pthread_key_t k; k * 1;]])],
|
||||
[ac_pthread_key_t_is_arithmetic_type=yes],
|
||||
[ac_pthread_key_t_is_arithmetic_type=no]
|
||||
)
|
||||
AC_MSG_RESULT($ac_pthread_key_t_is_arithmetic_type)
|
||||
if test "$ac_pthread_key_t_is_arithmetic_type" = yes ; then
|
||||
AC_DEFINE(PTHREAD_KEY_T_IS_COMPATIBLE_WITH_INT, 1,
|
||||
[Define if pthread_key_t is compatible with int.])
|
||||
fi
|
||||
else
|
||||
AC_MSG_RESULT(no)
|
||||
fi
|
||||
CC="$ac_save_cc"
|
||||
|
||||
AC_SUBST(OTHER_LIBTOOL_OPT)
|
||||
|
|
|
|||
|
|
@ -1241,6 +1241,9 @@
|
|||
/* Define if POSIX semaphores aren't enabled on your system */
|
||||
#undef POSIX_SEMAPHORES_NOT_ENABLED
|
||||
|
||||
/* Define if pthread_key_t is compatible with int. */
|
||||
#undef PTHREAD_KEY_T_IS_COMPATIBLE_WITH_INT
|
||||
|
||||
/* Defined if PTHREAD_SCOPE_SYSTEM supported. */
|
||||
#undef PTHREAD_SYSTEM_SCHED_SUPPORTED
|
||||
|
||||
|
|
@ -1302,6 +1305,9 @@
|
|||
/* The size of `pid_t', as computed by sizeof. */
|
||||
#undef SIZEOF_PID_T
|
||||
|
||||
/* The size of `pthread_key_t', as computed by sizeof. */
|
||||
#undef SIZEOF_PTHREAD_KEY_T
|
||||
|
||||
/* The size of `pthread_t', as computed by sizeof. */
|
||||
#undef SIZEOF_PTHREAD_T
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue