From 12cf076118570eebbff08c6b3090e0d4798447a1 Mon Sep 17 00:00:00 2001 From: cyfraeviolae Date: Wed, 3 Apr 2024 03:17:55 -0400 Subject: no venv --- .../site-packages/greenlet/TThreadStateDestroy.cpp | 195 --------------------- 1 file changed, 195 deletions(-) delete mode 100644 venv/lib/python3.11/site-packages/greenlet/TThreadStateDestroy.cpp (limited to 'venv/lib/python3.11/site-packages/greenlet/TThreadStateDestroy.cpp') diff --git a/venv/lib/python3.11/site-packages/greenlet/TThreadStateDestroy.cpp b/venv/lib/python3.11/site-packages/greenlet/TThreadStateDestroy.cpp deleted file mode 100644 index a149a1a..0000000 --- a/venv/lib/python3.11/site-packages/greenlet/TThreadStateDestroy.cpp +++ /dev/null @@ -1,195 +0,0 @@ -/* -*- indent-tabs-mode: nil; tab-width: 4; -*- */ -/** - * Implementation of the ThreadState destructors. - * - * Format with: - * clang-format -i --style=file src/greenlet/greenlet.c - * - * - * Fix missing braces with: - * clang-tidy src/greenlet/greenlet.c -fix -checks="readability-braces-around-statements" -*/ -#ifndef T_THREADSTATE_DESTROY -#define T_THREADSTATE_DESTROY - -#include "greenlet_greenlet.hpp" -#include "greenlet_thread_state.hpp" -#include "greenlet_thread_support.hpp" -#include "greenlet_cpython_add_pending.hpp" -#include "TGreenletGlobals.cpp" - -namespace greenlet { - -struct ThreadState_DestroyWithGIL -{ - ThreadState_DestroyWithGIL(ThreadState* state) - { - if (state && state->has_main_greenlet()) { - DestroyWithGIL(state); - } - } - - static int - DestroyWithGIL(ThreadState* state) - { - // Holding the GIL. - // Passed a non-shared pointer to the actual thread state. - // state -> main greenlet - assert(state->has_main_greenlet()); - PyGreenlet* main(state->borrow_main_greenlet()); - // When we need to do cross-thread operations, we check this. - // A NULL value means the thread died some time ago. - // We do this here, rather than in a Python dealloc function - // for the greenlet, in case there's still a reference out - // there. - static_cast(main->pimpl)->thread_state(nullptr); - - delete state; // Deleting this runs the destructor, DECREFs the main greenlet. - return 0; - } -}; - - - -struct ThreadState_DestroyNoGIL -{ - // ensure this is actually defined. - static_assert(GREENLET_BROKEN_PY_ADD_PENDING == 1 || GREENLET_BROKEN_PY_ADD_PENDING == 0, - "GREENLET_BROKEN_PY_ADD_PENDING not defined correctly."); - -#if GREENLET_BROKEN_PY_ADD_PENDING - static int _push_pending_call(struct _pending_calls *pending, - int (*func)(void *), void *arg) - { - int i = pending->last; - int j = (i + 1) % NPENDINGCALLS; - if (j == pending->first) { - return -1; /* Queue full */ - } - pending->calls[i].func = func; - pending->calls[i].arg = arg; - pending->last = j; - return 0; - } - - static int AddPendingCall(int (*func)(void *), void *arg) - { - _PyRuntimeState *runtime = &_PyRuntime; - if (!runtime) { - // obviously impossible - return 0; - } - struct _pending_calls *pending = &runtime->ceval.pending; - if (!pending->lock) { - return 0; - } - int result = 0; - PyThread_acquire_lock(pending->lock, WAIT_LOCK); - if (!pending->finishing) { - result = _push_pending_call(pending, func, arg); - } - PyThread_release_lock(pending->lock); - SIGNAL_PENDING_CALLS(&runtime->ceval); - return result; - } -#else - // Python < 3.8 or >= 3.9 - static int AddPendingCall(int (*func)(void*), void* arg) - { - return Py_AddPendingCall(func, arg); - } -#endif - - ThreadState_DestroyNoGIL(ThreadState* state) - { - // We are *NOT* holding the GIL. Our thread is in the middle - // of its death throes and the Python thread state is already - // gone so we can't use most Python APIs. One that is safe is - // ``Py_AddPendingCall``, unless the interpreter itself has - // been torn down. There is a limited number of calls that can - // be queued: 32 (NPENDINGCALLS) in CPython 3.10, so we - // coalesce these calls using our own queue. - if (state && state->has_main_greenlet()) { - // mark the thread as dead ASAP. - // this is racy! If we try to throw or switch to a - // greenlet from this thread from some other thread before - // we clear the state pointer, it won't realize the state - // is dead which can crash the process. - PyGreenlet* p = state->borrow_main_greenlet(); - assert(p->pimpl->thread_state() == state || p->pimpl->thread_state() == nullptr); - static_cast(p->pimpl)->thread_state(nullptr); - } - - // NOTE: Because we're not holding the GIL here, some other - // Python thread could run and call ``os.fork()``, which would - // be bad if that happenend while we are holding the cleanup - // lock (it wouldn't function in the child process). - // Make a best effort to try to keep the duration we hold the - // lock short. - // TODO: On platforms that support it, use ``pthread_atfork`` to - // drop this lock. - LockGuard cleanup_lock(*mod_globs->thread_states_to_destroy_lock); - - if (state && state->has_main_greenlet()) { - // Because we don't have the GIL, this is a race condition. - if (!PyInterpreterState_Head()) { - // We have to leak the thread state, if the - // interpreter has shut down when we're getting - // deallocated, we can't run the cleanup code that - // deleting it would imply. - return; - } - - mod_globs->queue_to_destroy(state); - if (mod_globs->thread_states_to_destroy.size() == 1) { - // We added the first item to the queue. We need to schedule - // the cleanup. - int result = ThreadState_DestroyNoGIL::AddPendingCall( - ThreadState_DestroyNoGIL::DestroyQueueWithGIL, - NULL); - if (result < 0) { - // Hmm, what can we do here? - fprintf(stderr, - "greenlet: WARNING: failed in call to Py_AddPendingCall; " - "expect a memory leak.\n"); - } - } - } - } - - static int - DestroyQueueWithGIL(void* UNUSED(arg)) - { - // We're holding the GIL here, so no Python code should be able to - // run to call ``os.fork()``. - while (1) { - ThreadState* to_destroy; - { - LockGuard cleanup_lock(*mod_globs->thread_states_to_destroy_lock); - if (mod_globs->thread_states_to_destroy.empty()) { - break; - } - to_destroy = mod_globs->take_next_to_destroy(); - } - // Drop the lock while we do the actual deletion. - ThreadState_DestroyWithGIL::DestroyWithGIL(to_destroy); - } - return 0; - } - -}; - -}; // namespace greenlet - -// The intent when GET_THREAD_STATE() is needed multiple times in a -// function is to take a reference to its return value in a local -// variable, to avoid the thread-local indirection. On some platforms -// (macOS), accessing a thread-local involves a function call (plus an -// initial function call in each function that uses a thread local); -// in contrast, static volatile variables are at some pre-computed -// offset. -typedef greenlet::ThreadStateCreator ThreadStateCreator; -static thread_local ThreadStateCreator g_thread_state_global; -#define GET_THREAD_STATE() g_thread_state_global - -#endif //T_THREADSTATE_DESTROY -- cgit v1.2.3