Commit Graph

141 Commits

Author SHA1 Message Date
Victor Stinner 74e425ec18
gh-110014: Fix _POSIX_THREADS and _POSIX_SEMAPHORES usage (#110139)
* pycore_pythread.h is now the central place to make sure that
  _POSIX_THREADS and _POSIX_SEMAPHORES macros are defined if
  available.
* Make sure that pycore_pythread.h is included when _POSIX_THREADS
  and _POSIX_SEMAPHORES macros are tested.
* PY_TIMEOUT_MAX is now defined as a constant, since its value
  depends on _POSIX_THREADS, instead of being defined as a macro.
* Prevent integer overflow in the preprocessor when computing
  PY_TIMEOUT_MAX_VALUE on Windows:
  replace "0xFFFFFFFELL * 1000 < LLONG_MAX"
  with "0xFFFFFFFELL < LLONG_MAX / 1000".
* Document the change and give hints how to fix affected code.
* Add an exception for PY_TIMEOUT_MAX  name to smelly.py
* Add PY_TIMEOUT_MAX to the stable ABI
2023-09-30 19:25:54 +02:00
YAMAMOTO Takashi d8f87cdf94
gh-101538: Add experimental wasi-threads build (#101537)
Co-authored-by: Brett Cannon <brett@python.org>
Co-authored-by: Erlend E. Aasland <erlend.aasland@protonmail.com>
2023-06-22 11:26:10 -07:00
Eric Snow 8d0bd93ae2
gh-81057: Fix the wasm32-wasi Buildbot (gh-100139)
The build was broken by gh-100084.

https://github.com/python/cpython/issues/81057
2022-12-09 10:17:54 -07:00
Eric Snow 1160001b34
gh-81057: Move Threading-Related Globals to _PyRuntimeState (#100084)
https://github.com/python/cpython/issues/81057
2022-12-08 17:50:58 -07:00
Christian Heimes 0fe645d6fd
gh-95174: Add pthread stubs for WASI (GH-95234)
Co-authored-by: Brett Cannon <brett@python.org>
2022-07-27 20:28:06 +02:00
Victor Stinner c7a79bb036
gh-74953: _PyThread_cond_after() uses _PyTime_t (#94056)
pthread _PyThread_cond_after() implementation now uses the _PyTime_t
type to handle properly overflow: clamp to the maximum value.

Remove MICROSECONDS_TO_TIMESPEC() function.
2022-06-21 15:45:49 +02:00
Victor Stinner 2664d9aacf
gh-74953: Reformat PyThread_acquire_lock_timed() (#93947)
Reformat the pthread implementation of PyThread_acquire_lock_timed()
using a mutex and a conditioinal variable.

* Add goto to avoid multiple indentation levels and exit quickly
* Use "while(1)" and make the control flow more obvious.
* PEP 7: Add braces around if blocks.
2022-06-19 11:50:21 +02:00
Victor Stinner f64557f480
gh-74953: Fix PyThread_acquire_lock_timed() code recomputing the timeout (#93941)
Set timeout, don't create a local variable with the same name.
2022-06-17 16:11:25 +02:00
Victor Stinner e444752fab
gh-74953: Add _PyTime_FromMicrosecondsClamp() function (#93942) 2022-06-17 16:11:13 +02:00
David CARLIER 9a1adf2790
bpo-42047: Add native thread ID for DragonFlyBSD (#22714)
Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
Co-authored-by: kj <28750310+Fidget-Spinner@users.noreply.github.com>
Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@protonmail.com>
Co-authored-by: Victor Stinner <vstinner@python.org>
2022-05-18 15:10:10 +02:00
Gregory P. Smith 6ed7c353b8
gh-88750: Remove the PYTHONTHREADDEBUG env var support. (#92509)
Remove the `PYTHONTHREADDEBUG` env var support.
Remove no-op dprintf() macro calls.
2022-05-09 16:03:46 -07:00
Eric Snow 313f92a57b
bpo-46008: Move thread-related interpreter state into a sub-struct. (gh-29971)
This parallels _PyRuntimeState.interpreters.  Doing this helps make it more clear what part of PyInterpreterState relates to its threads.

https://bugs.python.org/issue46008
2021-12-07 14:03:47 -07:00
Victor Stinner 833fdf126c
bpo-41710: Add private _PyDeadline_Get() function (GH-28674)
Add a private C API for deadlines: add _PyDeadline_Init() and
_PyDeadline_Get() functions.

* Add _PyTime_Add() and _PyTime_Mul() functions which compute t1+t2
  and t1*t2 and clamp the result on overflow.
* _PyTime_MulDiv() now uses _PyTime_Add() and _PyTime_Mul().
2021-10-01 13:29:25 +02:00
Victor Stinner 1ee0f94d16
bpo-41710: PyThread_acquire_lock_timed() uses sem_clockwait() (GH-28662)
On Unix, if the sem_clockwait() function is available in the C
library (glibc 2.30 and newer), the threading.Lock.acquire() method
now uses the monotonic clock (time.CLOCK_MONOTONIC) for the timeout,
rather than using the system clock (time.CLOCK_REALTIME), to not be
affected by system clock changes.

configure now checks if the sem_clockwait() function is available.
2021-10-01 09:55:28 +02:00
Victor Stinner 37b8294d62
bpo-41710: PyThread_acquire_lock_timed() clamps the timout (GH-28643)
PyThread_acquire_lock_timed() now clamps the timeout into the
[_PyTime_MIN; _PyTime_MAX] range (_PyTime_t type) if it is too large,
rather than calling Py_FatalError() which aborts the process.

PyThread_acquire_lock_timed() no longer uses
MICROSECONDS_TO_TIMESPEC() to compute sem_timedwait() argument, but
_PyTime_GetSystemClock() and _PyTime_AsTimespec_truncate().

Fix _thread.TIMEOUT_MAX value on Windows: the maximum timeout is
0x7FFFFFFF milliseconds (around 24.9 days), not 0xFFFFFFFF
milliseconds (around 49.7 days).

Set PY_TIMEOUT_MAX to 0x7FFFFFFF milliseconds, rather than 0xFFFFFFFF
milliseconds.

Fix PY_TIMEOUT_MAX overflow test: replace (us >= PY_TIMEOUT_MAX) with
(us > PY_TIMEOUT_MAX).
2021-09-30 10:16:51 +02:00
Victor Stinner 09796f2f14
bpo-41710: Add _PyTime_AsTimespec_clamp() (GH-28629)
Add the _PyTime_AsTimespec_clamp() function: similar to
_PyTime_AsTimespec(), but clamp to _PyTime_t min/max and don't raise
an exception.

PyThread_acquire_lock_timed() now uses _PyTime_AsTimespec_clamp() to
remove the Py_UNREACHABLE() code path.

* Add _PyTime_AsTime_t() function.
* Add PY_TIME_T_MIN and PY_TIME_T_MAX constants.
* Replace _PyTime_AsTimeval_noraise() with _PyTime_AsTimeval_clamp().
* Add pytime_divide_round_up() function.
* Fix integer overflow in pytime_divide().
* Add pytime_divmod() function.
2021-09-30 02:11:41 +02:00
Łukasz Langa be9de8721d
bpo-34602: Quadruple stack size on macOS when compiling with UBSAN (GH-27309) 2021-09-03 09:32:19 +02:00
pxinwr d5dcb65317
bpo-31904: Define THREAD_STACK_SIZE for VxWorks (GH-23718) 2020-12-09 22:47:28 +01:00
Benjamin Peterson ea62a4bd54
Fix -Wstrict-prototypes warning in thread_pthread.h. (GH-21477) 2020-07-15 08:12:05 -05:00
Victor Stinner 81a7be3fa2
bpo-40268: Rename _PyInterpreterState_GET_UNSAFE() (GH-19509)
Rename _PyInterpreterState_GET_UNSAFE() to _PyInterpreterState_GET()
for consistency with _PyThreadState_GET() and to have a shorter name
(help to fit into 80 columns).

Add also "assert(tstate != NULL);" to the function.
2020-04-14 15:14:01 +02:00
Victor Stinner 4a3fe08353
bpo-40268: Include explicitly pycore_interp.h (GH-19505)
pycore_pystate.h no longer includes pycore_interp.h:
it's now included explicitly in files accessing PyInterpreterState.
2020-04-14 14:26:24 +02:00
Victor Stinner 87255be696
bpo-40089: Add _at_fork_reinit() method to locks (GH-19195)
Add a private _at_fork_reinit() method to _thread.Lock,
_thread.RLock, threading.RLock and threading.Condition classes:
reinitialize the lock after fork in the child process; reset the lock
to the unlocked state.

Rename also the private _reset_internal_locks() method of
threading.Event to _at_fork_reinit().

* Add _PyThread_at_fork_reinit() private function. It is excluded
  from the limited C API.
* threading.Thread._reset_internal_locks() now calls
  _at_fork_reinit() on self._tstate_lock rather than creating a new
  Python lock object.
2020-04-07 23:11:49 +02:00
Andy Lester 7668a8bc93
Use calloc-based functions, not malloc. (GH-19152) 2020-03-24 23:26:44 -05:00
xdegaye 00ada2c1d5 bpo-38852: Set thread stack size to 8 Mb for debug builds on android platforms (GH-17337) 2019-12-08 08:40:14 +01:00
Benjamin Peterson f1c19031fd bpo-38068: Clean up gettimeofday configure logic. (GH-15775)
Assume gettimeofday exists and takes two arguments.
2019-09-10 03:37:59 -07:00
Michael Felt 9670ce76b8 bpo-18049: Define THREAD_STACK_SIZE for AIX to pass default recursion limit test (GH-15081)
* Define THREAD_STACK_SIZE for AIX to pass default recursion limit test
2019-08-03 08:12:26 +02:00
Ronald Oussoren 1a057bab0f
bpo-18049: Sync thread stack size to main thread size on macOS (GH-14748)
This changeset increases the default size of the stack
for threads on macOS to the size of the stack
of the main thread and reenables the relevant
recursion test.
2019-08-01 07:43:07 +02:00
Michael Felt d0eeb936d8 bpo-37077: Add native thread ID (TID) for AIX (GH-13624)
This is the followup  for issue36084



https://bugs.python.org/issue37077
2019-06-13 15:34:46 -07:00
David Carlier 5287022eee bpo-37160: Thread native ID NetBSD support (GH-13835) 2019-06-12 17:37:56 +02:00
David Carlier 0b9956e916 bpo-37087: Adding native ID support for OpenBSD (GH-13654) 2019-06-03 17:43:33 +02:00
Jake Tesler b121f63155 bpo-36084: Add native thread ID (TID) to threading.Thread (GH-13463)
Add native thread ID (TID) to threading.Thread objects
(supported platforms: Windows, FreeBSD, Linux, macOS).
2019-05-22 17:43:16 +02:00
Victor Stinner d12e75734d
Revert "bpo-36084: Add native thread ID to threading.Thread objects (GH-11993)" (GH-13458)
This reverts commit 4959c33d25.
2019-05-21 12:44:57 +02:00
Jake Tesler 4959c33d25 bpo-36084: Add native thread ID to threading.Thread objects (GH-11993) 2019-05-12 19:08:24 +02:00
Zackery Spytz 1a2252ed39 bpo-36594: Fix incorrect use of %p in format strings (GH-12769)
In addition, fix some other minor violations of C99.
2019-05-06 12:56:50 -04:00
Victor Stinner c664b342a4
bpo-36475: Make PyThread_exit_thread with _Py_NO_RETURN (GH-13068) 2019-05-04 11:48:05 -04:00
Inada Naoki 001fee14e0
bpo-12822: use monotonic clock for condvar if possible (GH-11723) 2019-02-20 10:00:09 +09:00
Siddhesh Poyarekar 9eea6eaf23 bpo-33015: Fix UB in pthread PyThread_start_new_thread (GH-6008)
Fix an undefined behaviour in the pthread implementation of
PyThread_start_new_thread(): add a function wrapper to always return
NULL.

Add pythread_callback struct and pythread_wrapper() to thread_pthread.h.
2018-11-30 16:14:25 +01:00
Victor Stinner 50b48572d9
bpo-35081: Add _PyThreadState_GET() internal macro (GH-10266)
If Py_BUILD_CORE is defined, the PyThreadState_GET() macro access
_PyRuntime which comes from the internal pycore_state.h header.
Public headers must not require internal headers.

Move PyThreadState_GET() and _PyInterpreterState_GET_UNSAFE() from
Include/pystate.h to Include/internal/pycore_state.h, and rename
PyThreadState_GET() to _PyThreadState_GET() there.

The PyThreadState_GET() macro of pystate.h is now redefined when
pycore_state.h is included, to use the fast _PyThreadState_GET().

Changes:

* Add _PyThreadState_GET() macro
* Replace "PyThreadState_GET()->interp" with
  _PyInterpreterState_GET_UNSAFE()
* Replace PyThreadState_GET() with _PyThreadState_GET() in internal C
  files (compiled with Py_BUILD_CORE defined), but keep
  PyThreadState_GET() in the public header files.
* _testcapimodule.c: replace PyThreadState_GET() with
  PyThreadState_Get(); the module is not compiled with Py_BUILD_CORE
  defined.
* pycore_state.h now requires Py_BUILD_CORE to be defined.
2018-11-01 01:51:40 +01:00
Victor Stinner 13ff24582c
bpo-32593: Drop FreeBSD 9 and older support (#5232)
Drop support of FreeBSD 9 and older.
2018-01-22 18:32:50 +01:00
Victor Stinner 8c663fd60e
Replace KB unit with KiB (#4293)
kB (*kilo* byte) unit means 1000 bytes, whereas KiB ("kibibyte")
means 1024 bytes. KB was misused: replace kB or KB with KiB when
appropriate.

Same change for MB and GB which become MiB and GiB.

Change the output of Tools/iobench/iobench.py.

Round also the size of the documentation from 5.5 MB to 5 MiB.
2017-11-08 14:44:44 -08:00
Victor Stinner 850a18e03e bpo-30768: Recompute timeout on interrupted lock (GH-4103)
Fix the pthread+semaphore implementation of
PyThread_acquire_lock_timed() when called with timeout > 0 and
intr_flag=0: recompute the timeout if sem_timedwait() is interrupted
by a signal (EINTR).

See also the PEP 475.

The pthread implementation of PyThread_acquire_lock() now fails with
a fatal error if the timeout is larger than PY_TIMEOUT_MAX, as done
in the Windows implementation.

The check prevents any risk of overflow in PyThread_acquire_lock().

Add also PY_DWORD_MAX constant.
2017-10-24 16:53:32 -07:00
Masayuki Yamamoto 731e189014 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
2017-10-06 20:41:34 +10:00
Benjamin Peterson 288d1daada remove support for BSD/OS (closes bpo-31624) (#3812) 2017-09-28 22:44:27 -07:00
Eric Snow 2ebc5ce42a bpo-30860: Consolidate stateful runtime globals. (#3397)
* group the (stateful) runtime globals into various topical structs
* consolidate the topical structs under a single top-level _PyRuntimeState struct
* add a check-c-globals.py script that helps identify runtime globals

Other globals are excluded (see globals.txt and check-c-globals.py).
2017-09-07 23:51:28 -06:00
Eric Snow 05351c1bd8 Revert "bpo-30860: Consolidate stateful runtime globals." (#3379)
Windows buildbots started failing due to include-related errors.
2017-09-05 21:43:08 -07:00
Eric Snow 76d5abc868 bpo-30860: Consolidate stateful runtime globals. (#2594)
* group the (stateful) runtime globals into various topical structs
* consolidate the topical structs under a single top-level _PyRuntimeState struct
* add a check-c-globals.py script that helps identify runtime globals

Other globals are excluded (see globals.txt and check-c-globals.py).
2017-09-05 18:26:16 -07:00
Masayuki Yamamoto aa0aa0492c bpo-30832: Remove own implementation for thread-local storage (#2537)
* bpo-30832: Remove own implementation for thread-local storage

CPython has provided the own implementation for thread-local storage
(TLS) on Python/thread.c, it's used in the case which a platform has
not supplied native TLS.  However, currently all supported platforms
(NT and pthreads) have provided native TLS and defined the
Py_HAVE_NATIVE_TLS macro with unconditional in any case.

* bpo-30832: replace NT with Windows

* bpo-30832: change to directive chain

* bpo-30832: remove comemnt which making no sense
2017-07-03 13:34:38 +02:00
Antoine Pitrou f84ac420c2 bpo-30765: Avoid blocking when PyThread_acquire_lock() is asked not to (#2403)
* bpo-30765: Avoid blocking when PyThread_acquire_lock() is asked not to lock

This is especially important if PyThread_acquire_lock() is called reentrantly
(for example from a signal handler).

* Update 2017-06-26-14-29-50.bpo-30765.Q5iBmf.rst

* Avoid core logic when taking the mutex failed
2017-06-26 20:41:07 +02:00
Serhiy Storchaka aefa7ebf0f bpo-6532: Make the thread id an unsigned integer. (#781)
* bpo-6532: Make the thread id an unsigned integer.

From C API side the type of results of PyThread_start_new_thread() and
PyThread_get_thread_ident(), the id parameter of
PyThreadState_SetAsyncExc(), and the thread_id field of PyThreadState
changed from "long" to "unsigned long".

* Restore a check in thread_get_ident().
2017-03-23 14:48:39 +01:00
Daniel Birnstiel d7fa6b259e bpo-29859: Fix error messages from return codes for pthread_* calls (GH-741) 2017-03-21 22:06:06 +09:00