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* gh-137884: Added threading.get_native_id() on Illumos/Solaris (GH-137927)Yüce Tekol2025-08-201-0/+4
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* gh-134745: Change PyThread_allocate_lock() implementation to PyMutex (#134747)Victor Stinner2025-05-301-392/+0
| | | Co-authored-by: Sam Gross <colesbury@gmail.com>
* gh-130115: fix thread identifiers for 32-bit musl (#130391)Vincent Fazio2025-04-041-9/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | CPython's pthread-based thread identifier relies on pthread_t being able to be represented as an unsigned integer type. This is true in most Linux libc implementations where it's defined as an unsigned long, however musl typedefs it as a struct *. If the pointer has the high bit set and is cast to PyThread_ident_t, the resultant value can be sign-extended [0]. This can cause issues when comparing against threading._MainThread's identifier. The main thread's identifier value is retrieved via _get_main_thread_ident which is backed by an unsigned long which truncates sign extended bits. >>> hex(threading.main_thread().ident) '0xb6f33f3c' >>> hex(threading.current_thread().ident) '0xffffffffb6f33f3c' Work around this by conditionally compiling in some code for non-glibc based Linux platforms that are at risk of sign-extension to return a PyLong based on the main thread's unsigned long thread identifier if the current thread is the main thread. [0]: https://gcc.gnu.org/onlinedocs/gcc-14.2.0/gcc/Arrays-and-pointers-implementation.html --------- Signed-off-by: Vincent Fazio <vfazio@gmail.com>
* gh-87135: Hang non-main threads that attempt to acquire the GIL during ↵Jeremy Maitin-Shepard2024-10-021-2/+13
| | | | | | | finalization (GH-105805) Instead of surprise crashes and memory corruption, we now hang threads that attempt to re-enter the Python interpreter after Python runtime finalization has started. These are typically daemon threads (our long standing mis-feature) but could also be threads spawned by extension modules that then try to call into Python. This marks the `PyThread_exit_thread` public C API as deprecated as there is no plausible safe way to accomplish that on any supported platform in the face of things like C++ code with finalizers anywhere on a thread's stack. Doing this was the least bad option. Co-authored-by: Gregory P. Smith <greg@krypto.org>
* gh-110850: Remove _PyTime_TimeUnchecked() function (#118552)Victor Stinner2024-05-051-5/+13
| | | | | | | | | | | | | Use the new public Raw functions: * _PyTime_PerfCounterUnchecked() with PyTime_PerfCounterRaw() * _PyTime_TimeUnchecked() with PyTime_TimeRaw() * _PyTime_MonotonicUnchecked() with PyTime_MonotonicRaw() Remove internal functions: * _PyTime_PerfCounterUnchecked() * _PyTime_TimeUnchecked() * _PyTime_MonotonicUnchecked()
* gh-112536: Add TSAN builds on Github Actions (#116872)Donghee Na2024-03-161-0/+4
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* gh-110850: Cleanup PyTime API: PyTime_t are nanoseconds (#115753)Victor Stinner2024-02-211-1/+1
| | | | | | | | | | 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().
* gh-110850: Replace private _PyTime_MAX with public PyTime_MAX (#115751)Victor Stinner2024-02-211-2/+2
| | | | | | | Remove references to the old names _PyTime_MIN and _PyTime_MAX, now that PyTime_MIN and PyTime_MAX are public. Replace also _PyTime_MIN with PyTime_MIN.
* gh-110850: Rename internal PyTime C API functions (#115734)Victor Stinner2024-02-201-4/+4
| | | | | | | | | | | | | | | | | 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.
* gh-110850: Cleanup pycore_time.h includes (#115724)Victor Stinner2024-02-201-0/+1
| | | | | <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.
* gh-110850: Replace _PyTime_t with PyTime_t (#115719)Victor Stinner2024-02-201-6/+6
| | | | | Run command: sed -i -e 's!\<_PyTime_t\>!PyTime_t!g' $(find -name "*.c" -o -name "*.h")
* gh-115035: Mark ThreadHandles as non-joinable earlier after forking (#115042)Sam Gross2024-02-061-10/+0
| | | | | | 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.
* gh-81925: Implement native thread ids for kFreeBSD (#111761)Samuel Thibault2023-11-091-0/+5
| | | | | --------- Co-authored-by: Antoine Pitrou <antoine@python.org>
* GH-110829: Ensure Thread.join() joins the OS thread (#110848)Antoine Pitrou2023-11-041-11/+60
| | | | | | | 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>
* gh-109693: Remove pycore_atomic.h (gh-110992)Donghee Na2023-10-171-1/+0
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* gh-109693: Update _gil_runtime_state.locked to use pyatomic.h (gh-110836)Donghee Na2023-10-161-0/+1
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* gh-110014: Fix _POSIX_THREADS and _POSIX_SEMAPHORES usage (#110139)Victor Stinner2023-09-301-4/+5
| | | | | | | | | | | | | | | | * 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
* gh-101538: Add experimental wasi-threads build (#101537)YAMAMOTO Takashi2023-06-221-0/+8
| | | | Co-authored-by: Brett Cannon <brett@python.org> Co-authored-by: Erlend E. Aasland <erlend.aasland@protonmail.com>
* gh-81057: Fix the wasm32-wasi Buildbot (gh-100139)Eric Snow2022-12-091-1/+2
| | | | | The build was broken by gh-100084. https://github.com/python/cpython/issues/81057
* gh-81057: Move Threading-Related Globals to _PyRuntimeState (#100084)Eric Snow2022-12-091-11/+13
| | | https://github.com/python/cpython/issues/81057
* gh-95174: Add pthread stubs for WASI (GH-95234)Christian Heimes2022-07-271-1/+3
| | | Co-authored-by: Brett Cannon <brett@python.org>
* gh-74953: _PyThread_cond_after() uses _PyTime_t (#94056)Victor Stinner2022-06-211-26/+13
| | | | | | 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.
* gh-74953: Reformat PyThread_acquire_lock_timed() (#93947)Victor Stinner2022-06-191-46/+62
| | | | | | | | 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.
* gh-74953: Fix PyThread_acquire_lock_timed() code recomputing the timeout ↵Victor Stinner2022-06-171-1/+1
| | | | | (#93941) Set timeout, don't create a local variable with the same name.
* gh-74953: Add _PyTime_FromMicrosecondsClamp() function (#93942)Victor Stinner2022-06-171-16/+9
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* bpo-42047: Add native thread ID for DragonFlyBSD (#22714)David CARLIER2022-05-181-0/+5
| | | | | | 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>
* gh-88750: Remove the PYTHONTHREADDEBUG env var support. (#92509)Gregory P. Smith2022-05-091-19/+0
| | | | Remove the `PYTHONTHREADDEBUG` env var support. Remove no-op dprintf() macro calls.
* bpo-46008: Move thread-related interpreter state into a sub-struct. (gh-29971)Eric Snow2021-12-071-4/+4
| | | | | This parallels _PyRuntimeState.interpreters. Doing this helps make it more clear what part of PyInterpreterState relates to its threads. https://bugs.python.org/issue46008
* bpo-41710: Add private _PyDeadline_Get() function (GH-28674)Victor Stinner2021-10-011-10/+8
| | | | | | | | 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().
* bpo-41710: PyThread_acquire_lock_timed() uses sem_clockwait() (GH-28662)Victor Stinner2021-10-011-6/+33
| | | | | | | | | 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.
* bpo-41710: PyThread_acquire_lock_timed() clamps the timout (GH-28643)Victor Stinner2021-09-301-29/+34
| | | | | | | | | | | | | | | | | | | 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).
* bpo-41710: Add _PyTime_AsTimespec_clamp() (GH-28629)Victor Stinner2021-09-301-5/+1
| | | | | | | | | | | | | | | 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.
* bpo-34602: Quadruple stack size on macOS when compiling with UBSAN (GH-27309)Łukasz Langa2021-09-031-7/+6
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* bpo-31904: Define THREAD_STACK_SIZE for VxWorks (GH-23718)pxinwr2020-12-091-0/+4
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* Fix -Wstrict-prototypes warning in thread_pthread.h. (GH-21477)Benjamin Peterson2020-07-151-1/+1
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* bpo-40268: Rename _PyInterpreterState_GET_UNSAFE() (GH-19509)Victor Stinner2020-04-141-2/+2
| | | | | | | 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.
* bpo-40268: Include explicitly pycore_interp.h (GH-19505)Victor Stinner2020-04-141-0/+1
| | | | pycore_pystate.h no longer includes pycore_interp.h: it's now included explicitly in files accessing PyInterpreterState.
* bpo-40089: Add _at_fork_reinit() method to locks (GH-19195)Victor Stinner2020-04-071-0/+20
| | | | | | | | | | | | | | | 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.
* Use calloc-based functions, not malloc. (GH-19152)Andy Lester2020-03-251-2/+1
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* bpo-38852: Set thread stack size to 8 Mb for debug builds on android ↵xdegaye2019-12-081-0/+10
| | | | platforms (GH-17337)
* bpo-38068: Clean up gettimeofday configure logic. (GH-15775)Benjamin Peterson2019-09-101-8/+1
| | | Assume gettimeofday exists and takes two arguments.
* bpo-18049: Define THREAD_STACK_SIZE for AIX to pass default recursion limit ↵Michael Felt2019-08-031-0/+4
| | | | | | test (GH-15081) * Define THREAD_STACK_SIZE for AIX to pass default recursion limit test
* bpo-18049: Sync thread stack size to main thread size on macOS (GH-14748)Ronald Oussoren2019-08-011-1/+2
| | | | | | 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.
* bpo-37077: Add native thread ID (TID) for AIX (GH-13624)Michael Felt2019-06-131-2/+7
| | | | | | | This is the followup for issue36084 https://bugs.python.org/issue37077
* bpo-37160: Thread native ID NetBSD support (GH-13835)David Carlier2019-06-121-0/+5
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* bpo-37087: Adding native ID support for OpenBSD (GH-13654)David Carlier2019-06-031-0/+5
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* bpo-36084: Add native thread ID (TID) to threading.Thread (GH-13463)Jake Tesler2019-05-221-0/+26
| | | | Add native thread ID (TID) to threading.Thread objects (supported platforms: Windows, FreeBSD, Linux, macOS).
* Revert "bpo-36084: Add native thread ID to threading.Thread objects ↵Victor Stinner2019-05-211-27/+0
| | | | | (GH-11993)" (GH-13458) This reverts commit 4959c33d2555b89b494c678d99be81a65ee864b0.
* bpo-36084: Add native thread ID to threading.Thread objects (GH-11993)Jake Tesler2019-05-121-0/+27
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* bpo-36594: Fix incorrect use of %p in format strings (GH-12769)Zackery Spytz2019-05-061-2/+2
| | | In addition, fix some other minor violations of C99.
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