Commit Graph

84 Commits

Author SHA1 Message Date
Victor Stinner 0b7814e0b6
gh-110850: Use _PyDeadline_Get() in EnterNonRecursiveMutex() (#118556)
Use _PyDeadline_Init() and _PyDeadline_Get() in
EnterNonRecursiveMutex() of thread_nt.h.

_PyDeadline_Get() uses the monotonic clock which is now the same as
the perf counter clock on all platforms. So this change does not
cause any behavior change. It just reuses existing helper functions.
2024-05-04 09:39:58 +02:00
Steve Dower 9578288a3e
gh-116012: Preserve GetLastError() across calls to TlsGetValue on Windows (GH-116014) 2024-02-28 13:58:25 +00:00
Victor Stinner e4c34f04a1
gh-110850: Cleanup PyTime API: PyTime_t are nanoseconds (#115753)
PyTime_t no longer uses an arbitrary unit, it's always a number of
nanoseconds (64-bit signed integer).

* Rename _PyTime_FromNanosecondsObject() to _PyTime_FromLong().
* Rename _PyTime_AsNanosecondsObject() to _PyTime_AsLong().
* Remove pytime_from_nanoseconds().
* Remove pytime_as_nanoseconds().
* Remove _PyTime_FromNanoseconds().
2024-02-21 11:46:00 +01:00
Victor Stinner 52d1477566
gh-110850: Rename internal PyTime C API functions (#115734)
Rename functions:

* _PyTime_GetSystemClock() => _PyTime_TimeUnchecked()
* _PyTime_GetPerfCounter() => _PyTime_PerfCounterUnchecked()
* _PyTime_GetMonotonicClock() => _PyTime_MonotonicUnchecked()
* _PyTime_GetSystemClockWithInfo() => _PyTime_TimeWithInfo()
* _PyTime_GetMonotonicClockWithInfo() => _PyTime_MonotonicWithInfo()
* _PyTime_GetMonotonicClockWithInfo() => _PyTime_MonotonicWithInfo()

Changes:

* Remove "typedef PyTime_t PyTime_t;" which was
  "typedef PyTime_t _PyTime_t;" before a previous rename.
* Update comments of "Unchecked" functions.
* Remove invalid PyTime_Time() comment.
2024-02-20 22:16:37 +00:00
Victor Stinner d207c7cd5a
gh-110850: Cleanup pycore_time.h includes (#115724)
<pycore_time.h> include is no longer needed to get the PyTime_t type
in internal header files. This type is now provided by <Python.h>
include. Add <pycore_time.h> includes to C files instead.
2024-02-20 16:50:43 +00:00
Victor Stinner 9af80ec83d
gh-110850: Replace _PyTime_t with PyTime_t (#115719)
Run command:

sed -i -e 's!\<_PyTime_t\>!PyTime_t!g' $(find -name "*.c" -o -name "*.h")
2024-02-20 15:02:27 +00:00
Sam Gross b6228b521b
gh-115035: Mark ThreadHandles as non-joinable earlier after forking (#115042)
This marks dead ThreadHandles as non-joinable earlier in
`PyOS_AfterFork_Child()` before we execute any Python code. The handles
are stored in a global linked list in `_PyRuntimeState` because `fork()`
affects the entire process.
2024-02-06 14:45:04 -05:00
Andrew Rogers b3f0b698da
gh-104530: Enable native Win32 condition variables by default (GH-104531) 2024-02-02 13:50:51 +00:00
Antoine Pitrou 0e9c364f4a
GH-110829: Ensure Thread.join() joins the OS thread (#110848)
Joining a thread now ensures the underlying OS thread has exited. This is required for safer fork() in multi-threaded processes.

---------

Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
2023-11-04 13:59:24 +00:00
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
Victor Stinner cb35402c18
gh-88750: On Windows, PyThread_acquire_lock() no longer checks for NULL (#92586)
On Windows, PyThread_acquire_lock(), PyThread_acquire_lock_timed()
and PyThread_release_lock() no longer check at runtime if the lock is
not NULL.
2022-05-10 02:00:38 +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 98d2827002
bpo-41710: Fix PY_TIMEOUT_MAX on Windows (GH-28673)
WaitForSingleObject() accepts timeout in milliseconds in the range
[0; 0xFFFFFFFE] (DWORD type). INFINITE value (0xFFFFFFFF) means no
timeout. 0xFFFFFFFE milliseconds is around 49.7 days.

PY_TIMEOUT_MAX is (0xFFFFFFFE * 1000) milliseconds on Windows, around
49.7 days.

Partially revert commit 37b8294d62.
2021-10-01 13:03:03 +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 6bc89116cb
bpo-41299: Mark private thread_nt.h functions as static (GH-28553)
Mark the following thread_nt.h functions as static:

* AllocNonRecursiveMutex()
* FreeNonRecursiveMutex()
* EnterNonRecursiveMutex()
* LeaveNonRecursiveMutex()
2021-09-25 01:14:09 +02:00
Victor Stinner d639e31705
bpo-41299: Fix EnterNonRecursiveMutex() (GH-28548)
Remove Py_FatalError() call: the code works even if now is negative.
2021-09-25 00:40:18 +02:00
Ryan Hileman 449e6f0ef3
bpo-41299: Reduce lag in Windows threading timeouts by using a higher precision time source (GH-26568) 2021-06-07 21:26:02 +01:00
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
bobince 64838ce717
bpo-39847: EnterNonRecursiveMutex() uses GetTickCount64() (GH-18780)
The 32-bit (49-day) TickCount relied on in EnterNonRecursiveMutex can overflow
in the gap between the 'target' time and the 'now' time WaitForSingleObjectEx
returns, causing the loop to think it needs to wait another 49 days. This is
most likely to happen when the machine is hibernated during
WaitForSingleObjectEx.

This makes acquiring a lock/event/etc from the _thread or threading module
appear to never timeout.

Replace with GetTickCount64 - this is OK now Python no longer supports XP which
lacks it, and is in use for time.monotonic().

Co-authored-by: And Clover <and.clover@bromium.com>
2020-03-12 00:39:02 +01:00
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
Victor Stinner c664b342a4
bpo-36475: Make PyThread_exit_thread with _Py_NO_RETURN (GH-13068) 2019-05-04 11:48:05 -04:00
native-api 05e922136a bpo-33316: PyThread_release_lock always fails (GH-6541)
Use correct interpretation of return value from APIs.
2019-02-02 08:22:55 -08:00
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
hui shang 6027802ca7 Fix typo in thread_nt.h code comment (GH-5211)
The comment for PyThread_allocate_lock says "It has too be implemented ...".
There was an extra "o" in ".. to be implemented.."
2018-01-17 15:21:01 -08:00
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
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
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
Benjamin Peterson af580dff4a replace PY_LONG_LONG with long long 2016-09-06 10:46:49 -07:00
Larry Hastings 10108a7b9a Issue #27355: Removed support for Windows CE. It was never finished,
and Windows CE is no longer a relevant platform for Python.
2016-09-05 15:11:23 -07:00
Serhiy Storchaka 6a7b3a77b4 Issue #26778: Fixed "a/an/and" typos in code comment and documentation. 2016-04-17 08:32:47 +03:00
Kristján Valur Jónsson 33096fe829 The PyCOND_TIMEDWAIT must use microseconds for the timeout argument
in order to have the same resolution as pthreads condition variables.
At the same time, it must be large enough to accept 31 bits of
milliseconds, which is the maximum timeout value in the windows API.
A PY_LONG_LONG of microseconds fullfills both requirements.
This closes issue #20737
2014-05-08 10:36:27 +00:00
Victor Stinner 590cebe391 Issue #19787: PyThread_set_key_value() now always set the value
In Python 3.3, PyThread_set_key_value() did nothing if the key already exists
(if the current value is a non-NULL pointer).

When _PyGILState_NoteThreadState() is called twice on the same thread with a
different Python thread state, it still keeps the old Python thread state to
keep the old behaviour. Replacing the Python thread state with the new state
introduces new bugs: see issues #10915 and #15751.
2013-12-13 11:08:56 +01:00
Victor Stinner 441adb8c57 Backout changeset 46393019b650
test_capi is failing and the fix is not trivial, I prefer to revert
2013-12-13 04:14:41 +01:00
Victor Stinner cd0cb8ccd3 Close #19787: PyThread_set_key_value() now always set the value. In Python 3.3,
the function did nothing if the key already exists (if the current value is a
non-NULL pointer).

_testcapi.run_in_subinterp() now correctly sets the new Python thread state of
the current thread when a subinterpreter is created.
2013-12-13 03:22:00 +01:00
Victor Stinner 80aa565fb4 Issue #18203: Replace malloc() with PyMem_RawMalloc() to allocate thread locks 2013-07-07 17:17:59 +02:00
Martin v. Löwis b26a9b10ea Replace WaitForSingleObject with WaitForSingleObjectEx,
for better WinRT compatibility.
2013-01-25 14:25:48 +01:00
Kristján Valur Jónsson e75ff35af2 Issue #15038: Optimize python Locks on Windows
Extract cross-platform condition variable support into a separate file and
provide user-mode non-recursive locks for Windows.
2012-06-18 20:30:44 +00:00
Antoine Pitrou 7899acfc23 Issue #11618: Fix the timeout logic in threading.Lock.acquire() under
Windows.
2011-03-31 01:00:32 +02:00
Antoine Pitrou 810023db3e Issue #8844: Regular and recursive lock acquisitions can now be interrupted
by signals on platforms using pthreads.  Patch by Reid Kleckner.
2010-12-15 22:59:16 +00:00
Kristján Valur Jónsson 2fea9b961d issue 9786 Native TLS support for pthreads
PyThread_create_key now has a failure mode that the applicatino can detect.
2010-09-20 02:11:49 +00:00