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Name	Size	Permission	Date
clinic	[ DIR ]	drwxr-xr-x	2024-03-19 22:46
Python-ast.c	403.1 KB	-rw-r--r--	2024-03-19 22:46
Python-ast.gcda	73.55 KB	-rw-r--r--	2025-06-04 09:21
Python-ast.o	1.64 MB	-rw-r--r--	2025-06-04 09:22
README	62 B	-rw-r--r--	2024-03-19 22:46
_warnings.c	37.47 KB	-rw-r--r--	2024-03-19 22:46
_warnings.gcda	10.5 KB	-rw-r--r--	2025-06-04 09:21
_warnings.o	274.36 KB	-rw-r--r--	2025-06-04 09:22
asdl.c	188 B	-rw-r--r--	2024-03-19 22:46
asdl.gcda	3.98 KB	-rw-r--r--	2025-06-04 09:21
asdl.o	41.46 KB	-rw-r--r--	2025-06-04 09:22
ast.c	33.83 KB	-rw-r--r--	2024-03-19 22:46
ast.gcda	8.98 KB	-rw-r--r--	2025-06-04 09:21
ast.o	162 KB	-rw-r--r--	2025-06-04 09:22
ast_opt.c	29.15 KB	-rw-r--r--	2024-03-19 22:46
ast_opt.gcda	10.67 KB	-rw-r--r--	2025-06-04 09:21
ast_opt.o	464.67 KB	-rw-r--r--	2025-06-04 09:22
ast_unparse.c	25.85 KB	-rw-r--r--	2024-03-19 22:46
ast_unparse.gcda	9.81 KB	-rw-r--r--	2025-06-04 09:21
ast_unparse.o	204.5 KB	-rw-r--r--	2025-06-04 09:22
bltinmodule.c	88.5 KB	-rw-r--r--	2024-03-19 22:46
bltinmodule.gcda	17.87 KB	-rw-r--r--	2025-06-04 09:21
bltinmodule.o	611.81 KB	-rw-r--r--	2025-06-04 09:22
bootstrap_hash.c	18.18 KB	-rw-r--r--	2024-03-19 22:46
bootstrap_hash.gcda	4.34 KB	-rw-r--r--	2025-06-04 09:21
bootstrap_hash.o	63.27 KB	-rw-r--r--	2025-06-04 09:22
ceval.c	206.97 KB	-rw-r--r--	2024-03-19 22:46
ceval.gcda	29.57 KB	-rw-r--r--	2025-06-04 09:21
ceval.o	1.21 MB	-rw-r--r--	2025-06-04 09:22
ceval_gil.h	12.19 KB	-rw-r--r--	2024-03-19 22:46
codecs.c	45.02 KB	-rw-r--r--	2024-03-19 22:46
codecs.gcda	12.75 KB	-rw-r--r--	2025-06-04 09:21
codecs.o	329.38 KB	-rw-r--r--	2025-06-04 09:22
compile.c	233.08 KB	-rw-r--r--	2024-03-19 22:46
compile.gcda	43.95 KB	-rw-r--r--	2025-06-04 09:21
compile.o	1.79 MB	-rw-r--r--	2025-06-04 09:22
condvar.h	8.44 KB	-rw-r--r--	2024-03-19 22:46
context.c	30.93 KB	-rw-r--r--	2024-03-19 22:46
context.gcda	9.95 KB	-rw-r--r--	2025-06-04 09:21
context.o	200.97 KB	-rw-r--r--	2025-06-04 09:22
dtoa.c	78.28 KB	-rw-r--r--	2024-03-19 22:46
dtoa.gcda	10.32 KB	-rw-r--r--	2025-06-04 09:21
dtoa.o	658.92 KB	-rw-r--r--	2025-06-04 09:22
dup2.c	759 B	-rw-r--r--	2024-03-19 22:46
dynamic_annotations.c	6.59 KB	-rw-r--r--	2024-03-19 22:46
dynamic_annotations.o	2.16 KB	-rw-r--r--	2025-06-04 09:22
dynload_hpux.c	2.12 KB	-rw-r--r--	2024-03-19 22:46
dynload_shlib.c	3.47 KB	-rw-r--r--	2024-03-19 22:46
dynload_shlib.gcda	3.77 KB	-rw-r--r--	2025-06-04 09:21
dynload_shlib.o	78.03 KB	-rw-r--r--	2025-06-04 09:22
dynload_stub.c	186 B	-rw-r--r--	2024-03-19 22:46
dynload_win.c	9.97 KB	-rw-r--r--	2024-03-19 22:46
errors.c	49.3 KB	-rw-r--r--	2024-03-19 22:46
errors.gcda	11.97 KB	-rw-r--r--	2025-06-04 09:21
errors.o	604.46 KB	-rw-r--r--	2025-06-04 09:22
fileutils.c	65.03 KB	-rw-r--r--	2024-03-19 22:46
fileutils.gcda	9.9 KB	-rw-r--r--	2025-06-04 09:21
fileutils.o	235.27 KB	-rw-r--r--	2025-06-04 09:22
formatter_unicode.c	50.35 KB	-rw-r--r--	2024-03-19 22:46
formatter_unicode.gcda	7.99 KB	-rw-r--r--	2025-06-04 09:21
formatter_unicode.o	352.49 KB	-rw-r--r--	2025-06-04 09:22
frozen.c	1.31 KB	-rw-r--r--	2024-03-19 22:46
frozen.o	122.48 KB	-rw-r--r--	2025-06-04 09:22
frozen_hello.h	547 B	-rw-r--r--	2024-03-19 22:46
frozenmain.c	3.12 KB	-rw-r--r--	2024-03-19 22:46
frozenmain.o	55.7 KB	-rw-r--r--	2025-06-04 09:22
future.c	4.35 KB	-rw-r--r--	2024-03-19 22:46
future.gcda	3.91 KB	-rw-r--r--	2025-06-04 09:21
future.o	69.3 KB	-rw-r--r--	2025-06-04 09:22
getargs.c	83.81 KB	-rw-r--r--	2024-03-19 22:46
getargs.gcda	14.68 KB	-rw-r--r--	2025-06-04 09:21
getargs.o	702.23 KB	-rw-r--r--	2025-06-04 09:22
getcompiler.c	534 B	-rw-r--r--	2024-03-19 22:46
getcompiler.gcda	3.48 KB	-rw-r--r--	2025-06-04 09:21
getcompiler.o	31.86 KB	-rw-r--r--	2025-06-04 09:22
getcopyright.c	511 B	-rw-r--r--	2024-03-19 22:46
getcopyright.gcda	3.48 KB	-rw-r--r--	2025-06-04 09:21
getcopyright.o	32.27 KB	-rw-r--r--	2025-06-04 09:22
getopt.c	4.6 KB	-rw-r--r--	2024-03-19 22:46
getopt.gcda	3.82 KB	-rw-r--r--	2025-06-04 09:21
getopt.o	43.34 KB	-rw-r--r--	2025-06-04 09:22
getplatform.c	133 B	-rw-r--r--	2024-03-19 22:46
getplatform.gcda	3.48 KB	-rw-r--r--	2025-06-04 09:21
getplatform.o	31.85 KB	-rw-r--r--	2025-06-04 09:22
getversion.c	308 B	-rw-r--r--	2024-03-19 22:46
getversion.gcda	3.5 KB	-rw-r--r--	2025-06-04 09:21
getversion.o	32.93 KB	-rw-r--r--	2025-06-04 09:22
hamt.c	78.82 KB	-rw-r--r--	2024-03-19 22:46
hamt.gcda	11.18 KB	-rw-r--r--	2025-06-04 09:21
hamt.o	257.84 KB	-rw-r--r--	2025-06-04 09:22
hashtable.c	11.17 KB	-rw-r--r--	2024-03-19 22:46
hashtable.gcda	5.66 KB	-rw-r--r--	2025-06-04 09:21
hashtable.o	84.36 KB	-rw-r--r--	2025-06-04 09:22
import.c	62.01 KB	-rw-r--r--	2024-03-19 22:46
import.gcda	17.11 KB	-rw-r--r--	2025-06-04 09:21
import.o	461.4 KB	-rw-r--r--	2025-06-04 09:22
importdl.c	7.32 KB	-rw-r--r--	2024-03-19 22:46
importdl.gcda	4.35 KB	-rw-r--r--	2025-06-04 09:21
importdl.h	487 B	-rw-r--r--	2024-03-19 22:46
importdl.o	71.44 KB	-rw-r--r--	2025-06-04 09:22
importlib.h	99.12 KB	-rw-r--r--	2024-03-19 22:46
importlib_external.h	147.15 KB	-rw-r--r--	2024-03-19 22:46
importlib_zipimport.h	57.35 KB	-rw-r--r--	2024-03-19 22:46
initconfig.c	89.33 KB	-rw-r--r--	2024-03-19 22:46
initconfig.gcda	20.45 KB	-rw-r--r--	2025-06-04 09:21
initconfig.o	482.04 KB	-rw-r--r--	2025-06-04 09:22
makeopcodetargets.py	1.55 KB	-rwxr-xr-x	2024-03-19 22:46
marshal.c	48.33 KB	-rw-r--r--	2024-03-19 22:46
marshal.gcda	13.91 KB	-rw-r--r--	2025-06-04 09:21
marshal.o	325.08 KB	-rw-r--r--	2025-06-04 09:22
modsupport.c	18.12 KB	-rw-r--r--	2024-03-19 22:46
modsupport.gcda	6.66 KB	-rw-r--r--	2025-06-04 09:21
modsupport.o	243.86 KB	-rw-r--r--	2025-06-04 09:22
mysnprintf.c	2.49 KB	-rw-r--r--	2024-03-19 22:46
mysnprintf.gcda	3.56 KB	-rw-r--r--	2025-06-04 09:21
mysnprintf.o	39.3 KB	-rw-r--r--	2025-06-04 09:22
mystrtoul.c	8.09 KB	-rw-r--r--	2024-03-19 22:46
mystrtoul.gcda	3.93 KB	-rw-r--r--	2025-06-04 09:21
mystrtoul.o	64.22 KB	-rw-r--r--	2025-06-04 09:22
opcode_targets.h	6.31 KB	-rw-r--r--	2024-03-19 22:46
pathconfig.c	19.75 KB	-rw-r--r--	2024-03-19 22:46
pathconfig.gcda	7.42 KB	-rw-r--r--	2025-06-04 09:21
pathconfig.o	110.59 KB	-rw-r--r--	2025-06-04 09:22
preconfig.c	25.21 KB	-rw-r--r--	2024-03-19 22:46
preconfig.gcda	6.76 KB	-rw-r--r--	2025-06-04 09:21
preconfig.o	140.21 KB	-rw-r--r--	2025-06-04 09:22
pyarena.c	5.52 KB	-rw-r--r--	2024-03-19 22:46
pyarena.gcda	3.97 KB	-rw-r--r--	2025-06-04 09:21
pyarena.o	48.03 KB	-rw-r--r--	2025-06-04 09:22
pyctype.c	7.73 KB	-rw-r--r--	2024-03-19 22:46
pyctype.o	32.77 KB	-rw-r--r--	2025-06-04 09:22
pyfpe.c	345 B	-rw-r--r--	2024-03-19 22:46
pyfpe.o	4.01 KB	-rw-r--r--	2025-06-04 09:22
pyhash.c	13.45 KB	-rw-r--r--	2024-03-19 22:46
pyhash.gcda	4.16 KB	-rw-r--r--	2025-06-04 09:21
pyhash.o	70.6 KB	-rw-r--r--	2025-06-04 09:22
pylifecycle.c	80.77 KB	-rw-r--r--	2024-03-19 22:46
pylifecycle.gcda	15.06 KB	-rw-r--r--	2025-06-04 09:21
pylifecycle.o	390.44 KB	-rw-r--r--	2025-06-04 09:22
pymath.c	1.6 KB	-rw-r--r--	2024-03-19 22:46
pymath.gcda	3.54 KB	-rw-r--r--	2025-06-04 09:21
pymath.o	32.34 KB	-rw-r--r--	2025-06-04 09:22
pystate.c	56.36 KB	-rw-r--r--	2024-03-19 22:46
pystate.gcda	12.61 KB	-rw-r--r--	2025-06-04 09:21
pystate.o	238.3 KB	-rw-r--r--	2025-06-04 09:22
pystrcmp.c	753 B	-rw-r--r--	2024-03-19 22:46
pystrcmp.gcda	3.62 KB	-rw-r--r--	2025-06-04 09:21
pystrcmp.o	37.12 KB	-rw-r--r--	2025-06-04 09:22
pystrhex.c	5.24 KB	-rw-r--r--	2024-03-19 22:46
pystrhex.gcda	4.09 KB	-rw-r--r--	2025-06-04 09:21
pystrhex.o	55.29 KB	-rw-r--r--	2025-06-04 09:22
pystrtod.c	40.06 KB	-rw-r--r--	2024-03-19 22:46
pystrtod.gcda	5.14 KB	-rw-r--r--	2025-06-04 09:21
pystrtod.o	96.01 KB	-rw-r--r--	2025-06-04 09:22
pythonrun.c	42.71 KB	-rw-r--r--	2024-03-19 22:46
pythonrun.gcda	11.89 KB	-rw-r--r--	2025-06-04 09:21
pythonrun.o	282.42 KB	-rw-r--r--	2025-06-04 09:22
pytime.c	28.68 KB	-rw-r--r--	2024-03-19 22:46
pytime.gcda	7.47 KB	-rw-r--r--	2025-06-04 09:21
pytime.o	120.86 KB	-rw-r--r--	2025-06-04 09:22
stdlib_module_names.h	3.49 KB	-rw-r--r--	2024-03-19 22:46
structmember.c	8.83 KB	-rw-r--r--	2024-03-19 22:46
structmember.gcda	4.83 KB	-rw-r--r--	2025-06-04 09:21
structmember.o	73.16 KB	-rw-r--r--	2025-06-04 09:22
suggestions.c	8.46 KB	-rw-r--r--	2024-03-19 22:46
suggestions.gcda	4.29 KB	-rw-r--r--	2025-06-04 09:21
suggestions.o	57.27 KB	-rw-r--r--	2025-06-04 09:22
symtable.c	72.25 KB	-rw-r--r--	2024-03-19 22:46
symtable.gcda	15.05 KB	-rw-r--r--	2025-06-04 09:21
symtable.o	638.03 KB	-rw-r--r--	2025-06-04 09:22
sysmodule.c	94.57 KB	-rw-r--r--	2024-03-19 22:46
sysmodule.gcda	19.89 KB	-rw-r--r--	2025-06-04 09:21
sysmodule.o	579.73 KB	-rw-r--r--	2025-06-04 09:22
thread.c	5.8 KB	-rw-r--r--	2024-03-19 22:46
thread.gcda	6.58 KB	-rw-r--r--	2025-06-04 09:21
thread.o	133.44 KB	-rw-r--r--	2025-06-04 09:22
thread_nt.h	12.16 KB	-rw-r--r--	2024-03-19 22:46
thread_pthread.h	25.32 KB	-rw-r--r--	2024-03-19 22:46
traceback.c	25.55 KB	-rw-r--r--	2024-03-19 22:46
traceback.gcda	8.3 KB	-rw-r--r--	2025-06-04 09:21
traceback.o	169.99 KB	-rw-r--r--	2025-06-04 09:22
wordcode_helpers.h	1.25 KB	-rw-r--r--	2024-03-19 22:46

Rename

/*
 * Implementation of the Global Interpreter Lock (GIL).
 */

#include <stdlib.h>
#include <errno.h>

#include "pycore_atomic.h"

/*
   Notes about the implementation:

- The GIL is just a boolean variable (locked) whose access is protected
     by a mutex (gil_mutex), and whose changes are signalled by a condition
     variable (gil_cond). gil_mutex is taken for short periods of time,
     and therefore mostly uncontended.

- In the GIL-holding thread, the main loop (PyEval_EvalFrameEx) must be
     able to release the GIL on demand by another thread. A volatile boolean
     variable (gil_drop_request) is used for that purpose, which is checked
     at every turn of the eval loop. That variable is set after a wait of
     `interval` microseconds on `gil_cond` has timed out.

[Actually, another volatile boolean variable (eval_breaker) is used
       which ORs several conditions into one. Volatile booleans are
       sufficient as inter-thread signalling means since Python is run
       on cache-coherent architectures only.]

- A thread wanting to take the GIL will first let pass a given amount of
     time (`interval` microseconds) before setting gil_drop_request. This
     encourages a defined switching period, but doesn't enforce it since
     opcodes can take an arbitrary time to execute.

The `interval` value is available for the user to read and modify
     using the Python API `sys.{get,set}switchinterval()`.

- When a thread releases the GIL and gil_drop_request is set, that thread
     ensures that another GIL-awaiting thread gets scheduled.
     It does so by waiting on a condition variable (switch_cond) until
     the value of last_holder is changed to something else than its
     own thread state pointer, indicating that another thread was able to
     take the GIL.

This is meant to prohibit the latency-adverse behaviour on multi-core
     machines where one thread would speculatively release the GIL, but still
     run and end up being the first to re-acquire it, making the "timeslices"
     much longer than expected.
     (Note: this mechanism is enabled with FORCE_SWITCHING above)
*/

#include "condvar.h"

#define MUTEX_INIT(mut) \
    if (PyMUTEX_INIT(&(mut))) { \
        Py_FatalError("PyMUTEX_INIT(" #mut ") failed"); };
#define MUTEX_FINI(mut) \
    if (PyMUTEX_FINI(&(mut))) { \
        Py_FatalError("PyMUTEX_FINI(" #mut ") failed"); };
#define MUTEX_LOCK(mut) \
    if (PyMUTEX_LOCK(&(mut))) { \
        Py_FatalError("PyMUTEX_LOCK(" #mut ") failed"); };
#define MUTEX_UNLOCK(mut) \
    if (PyMUTEX_UNLOCK(&(mut))) { \
        Py_FatalError("PyMUTEX_UNLOCK(" #mut ") failed"); };

#define COND_INIT(cond) \
    if (PyCOND_INIT(&(cond))) { \
        Py_FatalError("PyCOND_INIT(" #cond ") failed"); };
#define COND_FINI(cond) \
    if (PyCOND_FINI(&(cond))) { \
        Py_FatalError("PyCOND_FINI(" #cond ") failed"); };
#define COND_SIGNAL(cond) \
    if (PyCOND_SIGNAL(&(cond))) { \
        Py_FatalError("PyCOND_SIGNAL(" #cond ") failed"); };
#define COND_WAIT(cond, mut) \
    if (PyCOND_WAIT(&(cond), &(mut))) { \
        Py_FatalError("PyCOND_WAIT(" #cond ") failed"); };
#define COND_TIMED_WAIT(cond, mut, microseconds, timeout_result) \
    { \
        int r = PyCOND_TIMEDWAIT(&(cond), &(mut), (microseconds)); \
        if (r < 0) \
            Py_FatalError("PyCOND_WAIT(" #cond ") failed"); \
        if (r) /* 1 == timeout, 2 == impl. can't say, so assume timeout */ \
            timeout_result = 1; \
        else \
            timeout_result = 0; \
    } \

#define DEFAULT_INTERVAL 5000

static void _gil_initialize(struct _gil_runtime_state *gil)
{
    _Py_atomic_int uninitialized = {-1};
    gil->locked = uninitialized;
    gil->interval = DEFAULT_INTERVAL;
}

static int gil_created(struct _gil_runtime_state *gil)
{
    return (_Py_atomic_load_explicit(&gil->locked, _Py_memory_order_acquire) >= 0);
}

static void create_gil(struct _gil_runtime_state *gil)
{
    MUTEX_INIT(gil->mutex);
#ifdef FORCE_SWITCHING
    MUTEX_INIT(gil->switch_mutex);
#endif
    COND_INIT(gil->cond);
#ifdef FORCE_SWITCHING
    COND_INIT(gil->switch_cond);
#endif
    _Py_atomic_store_relaxed(&gil->last_holder, 0);
    _Py_ANNOTATE_RWLOCK_CREATE(&gil->locked);
    _Py_atomic_store_explicit(&gil->locked, 0, _Py_memory_order_release);
}

static void destroy_gil(struct _gil_runtime_state *gil)
{
    /* some pthread-like implementations tie the mutex to the cond
     * and must have the cond destroyed first.
     */
    COND_FINI(gil->cond);
    MUTEX_FINI(gil->mutex);
#ifdef FORCE_SWITCHING
    COND_FINI(gil->switch_cond);
    MUTEX_FINI(gil->switch_mutex);
#endif
    _Py_atomic_store_explicit(&gil->locked, -1,
                              _Py_memory_order_release);
    _Py_ANNOTATE_RWLOCK_DESTROY(&gil->locked);
}

static void recreate_gil(struct _gil_runtime_state *gil)
{
    _Py_ANNOTATE_RWLOCK_DESTROY(&gil->locked);
    /* XXX should we destroy the old OS resources here? */
    create_gil(gil);
}

static void
drop_gil(struct _ceval_runtime_state *ceval, struct _ceval_state *ceval2,
         PyThreadState *tstate)
{
#ifdef EXPERIMENTAL_ISOLATED_SUBINTERPRETERS
    struct _gil_runtime_state *gil = &ceval2->gil;
#else
    struct _gil_runtime_state *gil = &ceval->gil;
#endif
    if (!_Py_atomic_load_relaxed(&gil->locked)) {
        Py_FatalError("drop_gil: GIL is not locked");
    }

/* tstate is allowed to be NULL (early interpreter init) */
    if (tstate != NULL) {
        /* Sub-interpreter support: threads might have been switched
           under our feet using PyThreadState_Swap(). Fix the GIL last
           holder variable so that our heuristics work. */
        _Py_atomic_store_relaxed(&gil->last_holder, (uintptr_t)tstate);
    }

MUTEX_LOCK(gil->mutex);
    _Py_ANNOTATE_RWLOCK_RELEASED(&gil->locked, /*is_write=*/1);
    _Py_atomic_store_relaxed(&gil->locked, 0);
    COND_SIGNAL(gil->cond);
    MUTEX_UNLOCK(gil->mutex);

#ifdef FORCE_SWITCHING
    if (_Py_atomic_load_relaxed(&ceval2->gil_drop_request) && tstate != NULL) {
        MUTEX_LOCK(gil->switch_mutex);
        /* Not switched yet => wait */
        if (((PyThreadState*)_Py_atomic_load_relaxed(&gil->last_holder)) == tstate)
        {
            assert(is_tstate_valid(tstate));
            RESET_GIL_DROP_REQUEST(tstate->interp);
            /* NOTE: if COND_WAIT does not atomically start waiting when
               releasing the mutex, another thread can run through, take
               the GIL and drop it again, and reset the condition
               before we even had a chance to wait for it. */
            COND_WAIT(gil->switch_cond, gil->switch_mutex);
        }
        MUTEX_UNLOCK(gil->switch_mutex);
    }
#endif
}

/* Check if a Python thread must exit immediately, rather than taking the GIL
   if Py_Finalize() has been called.

When this function is called by a daemon thread after Py_Finalize() has been
   called, the GIL does no longer exist.

tstate must be non-NULL. */
static inline int
tstate_must_exit(PyThreadState *tstate)
{
    /* bpo-39877: Access _PyRuntime directly rather than using
       tstate->interp->runtime to support calls from Python daemon threads.
       After Py_Finalize() has been called, tstate can be a dangling pointer:
       point to PyThreadState freed memory. */
    PyThreadState *finalizing = _PyRuntimeState_GetFinalizing(&_PyRuntime);
    return (finalizing != NULL && finalizing != tstate);
}

/* Take the GIL.

The function saves errno at entry and restores its value at exit.

tstate must be non-NULL. */
static void
take_gil(PyThreadState *tstate)
{
    int err = errno;

assert(tstate != NULL);

if (tstate_must_exit(tstate)) {
        /* bpo-39877: If Py_Finalize() has been called and tstate is not the
           thread which called Py_Finalize(), exit immediately the thread.

This code path can be reached by a daemon thread after Py_Finalize()
           completes. In this case, tstate is a dangling pointer: points to
           PyThreadState freed memory. */
        PyThread_exit_thread();
    }

assert(is_tstate_valid(tstate));
    PyInterpreterState *interp = tstate->interp;
    struct _ceval_runtime_state *ceval = &interp->runtime->ceval;
    struct _ceval_state *ceval2 = &interp->ceval;
#ifdef EXPERIMENTAL_ISOLATED_SUBINTERPRETERS
    struct _gil_runtime_state *gil = &ceval2->gil;
#else
    struct _gil_runtime_state *gil = &ceval->gil;
#endif

/* Check that _PyEval_InitThreads() was called to create the lock */
    assert(gil_created(gil));

MUTEX_LOCK(gil->mutex);

if (!_Py_atomic_load_relaxed(&gil->locked)) {
        goto _ready;
    }

int drop_requested = 0;
    while (_Py_atomic_load_relaxed(&gil->locked)) {
        unsigned long saved_switchnum = gil->switch_number;

unsigned long interval = (gil->interval >= 1 ? gil->interval : 1);
        int timed_out = 0;
        COND_TIMED_WAIT(gil->cond, gil->mutex, interval, timed_out);

/* If we timed out and no switch occurred in the meantime, it is time
           to ask the GIL-holding thread to drop it. */
        if (timed_out &&
            _Py_atomic_load_relaxed(&gil->locked) &&
            gil->switch_number == saved_switchnum)
        {
            if (tstate_must_exit(tstate)) {
                MUTEX_UNLOCK(gil->mutex);
                // gh-96387: If the loop requested a drop request in a previous
                // iteration, reset the request. Otherwise, drop_gil() can
                // block forever waiting for the thread which exited. Drop
                // requests made by other threads are also reset: these threads
                // may have to request again a drop request (iterate one more
                // time).
                if (drop_requested) {
                    RESET_GIL_DROP_REQUEST(interp);
                }
                PyThread_exit_thread();
            }
            assert(is_tstate_valid(tstate));

SET_GIL_DROP_REQUEST(interp);
            drop_requested = 1;
        }
    }

_ready:
#ifdef FORCE_SWITCHING
    /* This mutex must be taken before modifying gil->last_holder:
       see drop_gil(). */
    MUTEX_LOCK(gil->switch_mutex);
#endif
    /* We now hold the GIL */
    _Py_atomic_store_relaxed(&gil->locked, 1);
    _Py_ANNOTATE_RWLOCK_ACQUIRED(&gil->locked, /*is_write=*/1);

if (tstate != (PyThreadState*)_Py_atomic_load_relaxed(&gil->last_holder)) {
        _Py_atomic_store_relaxed(&gil->last_holder, (uintptr_t)tstate);
        ++gil->switch_number;
    }

#ifdef FORCE_SWITCHING
    COND_SIGNAL(gil->switch_cond);
    MUTEX_UNLOCK(gil->switch_mutex);
#endif

if (tstate_must_exit(tstate)) {
        /* bpo-36475: If Py_Finalize() has been called and tstate is not
           the thread which called Py_Finalize(), exit immediately the
           thread.

This code path can be reached by a daemon thread which was waiting
           in take_gil() while the main thread called
           wait_for_thread_shutdown() from Py_Finalize(). */
        MUTEX_UNLOCK(gil->mutex);
        drop_gil(ceval, ceval2, tstate);
        PyThread_exit_thread();
    }
    assert(is_tstate_valid(tstate));

if (_Py_atomic_load_relaxed(&ceval2->gil_drop_request)) {
        RESET_GIL_DROP_REQUEST(interp);
    }
    else {
        /* bpo-40010: eval_breaker should be recomputed to be set to 1 if there
           is a pending signal: signal received by another thread which cannot
           handle signals.

Note: RESET_GIL_DROP_REQUEST() calls COMPUTE_EVAL_BREAKER(). */
        COMPUTE_EVAL_BREAKER(interp, ceval, ceval2);
    }

/* Don't access tstate if the thread must exit */
    if (tstate->async_exc != NULL) {
        _PyEval_SignalAsyncExc(tstate->interp);
    }

MUTEX_UNLOCK(gil->mutex);

errno = err;
}

void _PyEval_SetSwitchInterval(unsigned long microseconds)
{
#ifdef EXPERIMENTAL_ISOLATED_SUBINTERPRETERS
    PyInterpreterState *interp = PyInterpreterState_Get();
    struct _gil_runtime_state *gil = &interp->ceval.gil;
#else
    struct _gil_runtime_state *gil = &_PyRuntime.ceval.gil;
#endif
    gil->interval = microseconds;
}

unsigned long _PyEval_GetSwitchInterval()
{
#ifdef EXPERIMENTAL_ISOLATED_SUBINTERPRETERS
    PyInterpreterState *interp = PyInterpreterState_Get();
    struct _gil_runtime_state *gil = &interp->ceval.gil;
#else
    struct _gil_runtime_state *gil = &_PyRuntime.ceval.gil;
#endif
    return gil->interval;
}