bpo-35134: Create Include/cpython/pystate.h (GH-10733)
Move pystate.h code surrounded by "#ifndef Py_LIMITED_API" to a new Include/cpython/pystate.h header file.
This commit is contained in:
Victor Stinner
GitHub
parent
ffedd9ad2a
commit
f2a9d5c837
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@ -0,0 +1,272 @@
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#ifndef Py_CPYTHON_PYSTATE_H
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# error "this header file must not be included directly"
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef PyObject* (*_PyFrameEvalFunction)(struct _frame *, int);
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/* Placeholders while working on the new configuration API
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*
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* See PEP 432 for final anticipated contents
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*/
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typedef struct {
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int install_signal_handlers; /* Install signal handlers? -1 means unset */
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PyObject *argv; /* sys.argv list, can be NULL */
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PyObject *executable; /* sys.executable str */
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PyObject *prefix; /* sys.prefix str */
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PyObject *base_prefix; /* sys.base_prefix str, can be NULL */
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PyObject *exec_prefix; /* sys.exec_prefix str */
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PyObject *base_exec_prefix; /* sys.base_exec_prefix str, can be NULL */
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PyObject *warnoptions; /* sys.warnoptions list, can be NULL */
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PyObject *xoptions; /* sys._xoptions dict, can be NULL */
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PyObject *module_search_path; /* sys.path list */
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PyObject *pycache_prefix; /* sys.pycache_prefix str, can be NULL */
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} _PyMainInterpreterConfig;
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#define _PyMainInterpreterConfig_INIT \
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(_PyMainInterpreterConfig){.install_signal_handlers = -1}
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/* Note: _PyMainInterpreterConfig_INIT sets other fields to 0/NULL */
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typedef struct _is {
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struct _is *next;
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struct _ts *tstate_head;
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int64_t id;
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int64_t id_refcount;
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PyThread_type_lock id_mutex;
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PyObject *modules;
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PyObject *modules_by_index;
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PyObject *sysdict;
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PyObject *builtins;
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PyObject *importlib;
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/* Used in Python/sysmodule.c. */
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int check_interval;
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/* Used in Modules/_threadmodule.c. */
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long num_threads;
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/* Support for runtime thread stack size tuning.
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A value of 0 means using the platform's default stack size
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or the size specified by the THREAD_STACK_SIZE macro. */
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/* Used in Python/thread.c. */
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size_t pythread_stacksize;
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PyObject *codec_search_path;
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PyObject *codec_search_cache;
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PyObject *codec_error_registry;
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int codecs_initialized;
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int fscodec_initialized;
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_PyCoreConfig core_config;
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_PyMainInterpreterConfig config;
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#ifdef HAVE_DLOPEN
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int dlopenflags;
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#endif
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PyObject *builtins_copy;
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PyObject *import_func;
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/* Initialized to PyEval_EvalFrameDefault(). */
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_PyFrameEvalFunction eval_frame;
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Py_ssize_t co_extra_user_count;
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freefunc co_extra_freefuncs[MAX_CO_EXTRA_USERS];
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#ifdef HAVE_FORK
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PyObject *before_forkers;
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PyObject *after_forkers_parent;
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PyObject *after_forkers_child;
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#endif
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/* AtExit module */
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void (*pyexitfunc)(PyObject *);
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PyObject *pyexitmodule;
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uint64_t tstate_next_unique_id;
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} PyInterpreterState;
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/* State unique per thread */
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/* Py_tracefunc return -1 when raising an exception, or 0 for success. */
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typedef int (*Py_tracefunc)(PyObject *, struct _frame *, int, PyObject *);
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/* The following values are used for 'what' for tracefunc functions
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*
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* To add a new kind of trace event, also update "trace_init" in
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* Python/sysmodule.c to define the Python level event name
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*/
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#define PyTrace_CALL 0
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#define PyTrace_EXCEPTION 1
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#define PyTrace_LINE 2
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#define PyTrace_RETURN 3
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#define PyTrace_C_CALL 4
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#define PyTrace_C_EXCEPTION 5
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#define PyTrace_C_RETURN 6
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#define PyTrace_OPCODE 7
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typedef struct _err_stackitem {
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/* This struct represents an entry on the exception stack, which is a
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* per-coroutine state. (Coroutine in the computer science sense,
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* including the thread and generators).
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* This ensures that the exception state is not impacted by "yields"
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* from an except handler.
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*/
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PyObject *exc_type, *exc_value, *exc_traceback;
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struct _err_stackitem *previous_item;
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} _PyErr_StackItem;
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typedef struct _ts {
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/* See Python/ceval.c for comments explaining most fields */
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struct _ts *prev;
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struct _ts *next;
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PyInterpreterState *interp;
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struct _frame *frame;
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int recursion_depth;
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char overflowed; /* The stack has overflowed. Allow 50 more calls
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to handle the runtime error. */
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char recursion_critical; /* The current calls must not cause
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a stack overflow. */
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int stackcheck_counter;
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/* 'tracing' keeps track of the execution depth when tracing/profiling.
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This is to prevent the actual trace/profile code from being recorded in
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the trace/profile. */
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int tracing;
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int use_tracing;
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Py_tracefunc c_profilefunc;
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Py_tracefunc c_tracefunc;
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PyObject *c_profileobj;
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PyObject *c_traceobj;
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/* The exception currently being raised */
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PyObject *curexc_type;
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PyObject *curexc_value;
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PyObject *curexc_traceback;
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/* The exception currently being handled, if no coroutines/generators
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* are present. Always last element on the stack referred to be exc_info.
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*/
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_PyErr_StackItem exc_state;
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/* Pointer to the top of the stack of the exceptions currently
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* being handled */
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_PyErr_StackItem *exc_info;
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PyObject *dict; /* Stores per-thread state */
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int gilstate_counter;
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PyObject *async_exc; /* Asynchronous exception to raise */
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unsigned long thread_id; /* Thread id where this tstate was created */
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int trash_delete_nesting;
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PyObject *trash_delete_later;
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/* Called when a thread state is deleted normally, but not when it
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* is destroyed after fork().
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* Pain: to prevent rare but fatal shutdown errors (issue 18808),
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* Thread.join() must wait for the join'ed thread's tstate to be unlinked
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* from the tstate chain. That happens at the end of a thread's life,
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* in pystate.c.
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* The obvious way doesn't quite work: create a lock which the tstate
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* unlinking code releases, and have Thread.join() wait to acquire that
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* lock. The problem is that we _are_ at the end of the thread's life:
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* if the thread holds the last reference to the lock, decref'ing the
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* lock will delete the lock, and that may trigger arbitrary Python code
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* if there's a weakref, with a callback, to the lock. But by this time
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* _PyRuntime.gilstate.tstate_current is already NULL, so only the simplest
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* of C code can be allowed to run (in particular it must not be possible to
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* release the GIL).
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* So instead of holding the lock directly, the tstate holds a weakref to
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* the lock: that's the value of on_delete_data below. Decref'ing a
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* weakref is harmless.
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* on_delete points to _threadmodule.c's static release_sentinel() function.
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* After the tstate is unlinked, release_sentinel is called with the
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* weakref-to-lock (on_delete_data) argument, and release_sentinel releases
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* the indirectly held lock.
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*/
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void (*on_delete)(void *);
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void *on_delete_data;
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int coroutine_origin_tracking_depth;
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PyObject *coroutine_wrapper;
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int in_coroutine_wrapper;
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PyObject *async_gen_firstiter;
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PyObject *async_gen_finalizer;
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PyObject *context;
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uint64_t context_ver;
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/* Unique thread state id. */
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uint64_t id;
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/* XXX signal handlers should also be here */
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} PyThreadState;
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/* Get the current interpreter state.
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Issue a fatal error if there no current Python thread state or no current
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interpreter. It cannot return NULL.
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The caller must hold the GIL.*/
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PyAPI_FUNC(PyInterpreterState *) _PyInterpreterState_Get(void);
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PyAPI_FUNC(int) _PyState_AddModule(PyObject*, struct PyModuleDef*);
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PyAPI_FUNC(void) _PyState_ClearModules(void);
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PyAPI_FUNC(PyThreadState *) _PyThreadState_Prealloc(PyInterpreterState *);
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PyAPI_FUNC(void) _PyThreadState_Init(PyThreadState *);
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PyAPI_FUNC(void) _PyThreadState_DeleteExcept(PyThreadState *tstate);
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PyAPI_FUNC(void) _PyGILState_Reinit(void);
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/* Similar to PyThreadState_Get(), but don't issue a fatal error
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* if it is NULL. */
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PyAPI_FUNC(PyThreadState *) _PyThreadState_UncheckedGet(void);
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/* PyGILState */
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/* Helper/diagnostic function - return 1 if the current thread
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currently holds the GIL, 0 otherwise.
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The function returns 1 if _PyGILState_check_enabled is non-zero. */
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PyAPI_FUNC(int) PyGILState_Check(void);
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/* Get the single PyInterpreterState used by this process' GILState
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implementation.
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This function doesn't check for error. Return NULL before _PyGILState_Init()
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is called and after _PyGILState_Fini() is called.
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See also _PyInterpreterState_Get() and _PyInterpreterState_GET_UNSAFE(). */
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PyAPI_FUNC(PyInterpreterState *) _PyGILState_GetInterpreterStateUnsafe(void);
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/* The implementation of sys._current_frames() Returns a dict mapping
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thread id to that thread's current frame.
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*/
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PyAPI_FUNC(PyObject *) _PyThread_CurrentFrames(void);
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/* Routines for advanced debuggers, requested by David Beazley.
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Don't use unless you know what you are doing! */
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PyAPI_FUNC(PyInterpreterState *) PyInterpreterState_Main(void);
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PyAPI_FUNC(PyInterpreterState *) PyInterpreterState_Head(void);
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PyAPI_FUNC(PyInterpreterState *) PyInterpreterState_Next(PyInterpreterState *);
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PyAPI_FUNC(PyThreadState *) PyInterpreterState_ThreadHead(PyInterpreterState *);
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PyAPI_FUNC(PyThreadState *) PyThreadState_Next(PyThreadState *);
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typedef struct _frame *(*PyThreadFrameGetter)(PyThreadState *self_);
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#ifdef __cplusplus
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}
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#endif
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@ -20,273 +20,31 @@ struct _ts; /* Forward */
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struct _is; /* Forward */
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struct _frame; /* Forward declaration for PyFrameObject. */
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#ifdef Py_LIMITED_API
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typedef struct _is PyInterpreterState;
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#else
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typedef PyObject* (*_PyFrameEvalFunction)(struct _frame *, int);
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/* Placeholders while working on the new configuration API
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*
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* See PEP 432 for final anticipated contents
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*/
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typedef struct {
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int install_signal_handlers; /* Install signal handlers? -1 means unset */
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PyObject *argv; /* sys.argv list, can be NULL */
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PyObject *executable; /* sys.executable str */
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PyObject *prefix; /* sys.prefix str */
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PyObject *base_prefix; /* sys.base_prefix str, can be NULL */
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PyObject *exec_prefix; /* sys.exec_prefix str */
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PyObject *base_exec_prefix; /* sys.base_exec_prefix str, can be NULL */
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PyObject *warnoptions; /* sys.warnoptions list, can be NULL */
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PyObject *xoptions; /* sys._xoptions dict, can be NULL */
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PyObject *module_search_path; /* sys.path list */
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PyObject *pycache_prefix; /* sys.pycache_prefix str, can be NULL */
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} _PyMainInterpreterConfig;
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#define _PyMainInterpreterConfig_INIT \
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(_PyMainInterpreterConfig){.install_signal_handlers = -1}
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/* Note: _PyMainInterpreterConfig_INIT sets other fields to 0/NULL */
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typedef struct _is {
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struct _is *next;
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struct _ts *tstate_head;
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int64_t id;
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int64_t id_refcount;
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PyThread_type_lock id_mutex;
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PyObject *modules;
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PyObject *modules_by_index;
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PyObject *sysdict;
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PyObject *builtins;
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PyObject *importlib;
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/* Used in Python/sysmodule.c. */
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int check_interval;
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/* Used in Modules/_threadmodule.c. */
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long num_threads;
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/* Support for runtime thread stack size tuning.
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A value of 0 means using the platform's default stack size
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or the size specified by the THREAD_STACK_SIZE macro. */
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/* Used in Python/thread.c. */
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size_t pythread_stacksize;
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PyObject *codec_search_path;
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PyObject *codec_search_cache;
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PyObject *codec_error_registry;
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int codecs_initialized;
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int fscodec_initialized;
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_PyCoreConfig core_config;
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_PyMainInterpreterConfig config;
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#ifdef HAVE_DLOPEN
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int dlopenflags;
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#endif
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PyObject *builtins_copy;
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PyObject *import_func;
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/* Initialized to PyEval_EvalFrameDefault(). */
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_PyFrameEvalFunction eval_frame;
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Py_ssize_t co_extra_user_count;
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freefunc co_extra_freefuncs[MAX_CO_EXTRA_USERS];
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#ifdef HAVE_FORK
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PyObject *before_forkers;
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PyObject *after_forkers_parent;
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PyObject *after_forkers_child;
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#endif
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/* AtExit module */
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void (*pyexitfunc)(PyObject *);
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PyObject *pyexitmodule;
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uint64_t tstate_next_unique_id;
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} PyInterpreterState;
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#endif /* !Py_LIMITED_API */
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/* State unique per thread */
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#ifndef Py_LIMITED_API
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/* Py_tracefunc return -1 when raising an exception, or 0 for success. */
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typedef int (*Py_tracefunc)(PyObject *, struct _frame *, int, PyObject *);
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/* The following values are used for 'what' for tracefunc functions
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*
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* To add a new kind of trace event, also update "trace_init" in
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* Python/sysmodule.c to define the Python level event name
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*/
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#define PyTrace_CALL 0
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#define PyTrace_EXCEPTION 1
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#define PyTrace_LINE 2
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#define PyTrace_RETURN 3
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#define PyTrace_C_CALL 4
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#define PyTrace_C_EXCEPTION 5
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#define PyTrace_C_RETURN 6
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#define PyTrace_OPCODE 7
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#endif /* Py_LIMITED_API */
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#ifdef Py_LIMITED_API
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typedef struct _ts PyThreadState;
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#else
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typedef struct _err_stackitem {
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/* This struct represents an entry on the exception stack, which is a
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* per-coroutine state. (Coroutine in the computer science sense,
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* including the thread and generators).
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* This ensures that the exception state is not impacted by "yields"
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* from an except handler.
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*/
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PyObject *exc_type, *exc_value, *exc_traceback;
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struct _err_stackitem *previous_item;
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} _PyErr_StackItem;
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typedef struct _ts {
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/* See Python/ceval.c for comments explaining most fields */
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struct _ts *prev;
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struct _ts *next;
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PyInterpreterState *interp;
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struct _frame *frame;
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int recursion_depth;
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char overflowed; /* The stack has overflowed. Allow 50 more calls
|
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to handle the runtime error. */
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char recursion_critical; /* The current calls must not cause
|
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a stack overflow. */
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int stackcheck_counter;
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/* 'tracing' keeps track of the execution depth when tracing/profiling.
|
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This is to prevent the actual trace/profile code from being recorded in
|
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the trace/profile. */
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int tracing;
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int use_tracing;
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Py_tracefunc c_profilefunc;
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Py_tracefunc c_tracefunc;
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PyObject *c_profileobj;
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PyObject *c_traceobj;
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/* The exception currently being raised */
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PyObject *curexc_type;
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PyObject *curexc_value;
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PyObject *curexc_traceback;
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/* The exception currently being handled, if no coroutines/generators
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* are present. Always last element on the stack referred to be exc_info.
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*/
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_PyErr_StackItem exc_state;
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/* Pointer to the top of the stack of the exceptions currently
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* being handled */
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_PyErr_StackItem *exc_info;
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PyObject *dict; /* Stores per-thread state */
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int gilstate_counter;
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PyObject *async_exc; /* Asynchronous exception to raise */
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unsigned long thread_id; /* Thread id where this tstate was created */
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int trash_delete_nesting;
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PyObject *trash_delete_later;
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/* Called when a thread state is deleted normally, but not when it
|
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* is destroyed after fork().
|
||||
* Pain: to prevent rare but fatal shutdown errors (issue 18808),
|
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* Thread.join() must wait for the join'ed thread's tstate to be unlinked
|
||||
* from the tstate chain. That happens at the end of a thread's life,
|
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* in pystate.c.
|
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* The obvious way doesn't quite work: create a lock which the tstate
|
||||
* unlinking code releases, and have Thread.join() wait to acquire that
|
||||
* lock. The problem is that we _are_ at the end of the thread's life:
|
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* if the thread holds the last reference to the lock, decref'ing the
|
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* lock will delete the lock, and that may trigger arbitrary Python code
|
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* if there's a weakref, with a callback, to the lock. But by this time
|
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* _PyRuntime.gilstate.tstate_current is already NULL, so only the simplest
|
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* of C code can be allowed to run (in particular it must not be possible to
|
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* release the GIL).
|
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* So instead of holding the lock directly, the tstate holds a weakref to
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* the lock: that's the value of on_delete_data below. Decref'ing a
|
||||
* weakref is harmless.
|
||||
* on_delete points to _threadmodule.c's static release_sentinel() function.
|
||||
* After the tstate is unlinked, release_sentinel is called with the
|
||||
* weakref-to-lock (on_delete_data) argument, and release_sentinel releases
|
||||
* the indirectly held lock.
|
||||
*/
|
||||
void (*on_delete)(void *);
|
||||
void *on_delete_data;
|
||||
|
||||
int coroutine_origin_tracking_depth;
|
||||
|
||||
PyObject *coroutine_wrapper;
|
||||
int in_coroutine_wrapper;
|
||||
|
||||
PyObject *async_gen_firstiter;
|
||||
PyObject *async_gen_finalizer;
|
||||
|
||||
PyObject *context;
|
||||
uint64_t context_ver;
|
||||
|
||||
/* Unique thread state id. */
|
||||
uint64_t id;
|
||||
|
||||
/* XXX signal handlers should also be here */
|
||||
|
||||
} PyThreadState;
|
||||
#endif /* !Py_LIMITED_API */
|
||||
|
||||
|
||||
PyAPI_FUNC(PyInterpreterState *) PyInterpreterState_New(void);
|
||||
PyAPI_FUNC(void) PyInterpreterState_Clear(PyInterpreterState *);
|
||||
PyAPI_FUNC(void) PyInterpreterState_Delete(PyInterpreterState *);
|
||||
|
||||
#if !defined(Py_LIMITED_API)
|
||||
/* Get the current interpreter state.
|
||||
|
||||
Issue a fatal error if there no current Python thread state or no current
|
||||
interpreter. It cannot return NULL.
|
||||
|
||||
The caller must hold the GIL.*/
|
||||
PyAPI_FUNC(PyInterpreterState *) _PyInterpreterState_Get(void);
|
||||
#endif
|
||||
|
||||
#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x03070000
|
||||
/* New in 3.7 */
|
||||
PyAPI_FUNC(int64_t) PyInterpreterState_GetID(PyInterpreterState *);
|
||||
#endif
|
||||
#ifndef Py_LIMITED_API
|
||||
PyAPI_FUNC(int) _PyState_AddModule(PyObject*, struct PyModuleDef*);
|
||||
#endif /* !Py_LIMITED_API */
|
||||
#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x03030000
|
||||
/* New in 3.3 */
|
||||
PyAPI_FUNC(int) PyState_AddModule(PyObject*, struct PyModuleDef*);
|
||||
PyAPI_FUNC(int) PyState_RemoveModule(struct PyModuleDef*);
|
||||
#endif
|
||||
PyAPI_FUNC(PyObject*) PyState_FindModule(struct PyModuleDef*);
|
||||
#ifndef Py_LIMITED_API
|
||||
PyAPI_FUNC(void) _PyState_ClearModules(void);
|
||||
#endif
|
||||
|
||||
PyAPI_FUNC(PyThreadState *) PyThreadState_New(PyInterpreterState *);
|
||||
#ifndef Py_LIMITED_API
|
||||
PyAPI_FUNC(PyThreadState *) _PyThreadState_Prealloc(PyInterpreterState *);
|
||||
PyAPI_FUNC(void) _PyThreadState_Init(PyThreadState *);
|
||||
#endif /* !Py_LIMITED_API */
|
||||
PyAPI_FUNC(void) PyThreadState_Clear(PyThreadState *);
|
||||
PyAPI_FUNC(void) PyThreadState_Delete(PyThreadState *);
|
||||
#ifndef Py_LIMITED_API
|
||||
PyAPI_FUNC(void) _PyThreadState_DeleteExcept(PyThreadState *tstate);
|
||||
#endif /* !Py_LIMITED_API */
|
||||
PyAPI_FUNC(void) PyThreadState_DeleteCurrent(void);
|
||||
#ifndef Py_LIMITED_API
|
||||
PyAPI_FUNC(void) _PyGILState_Reinit(void);
|
||||
#endif /* !Py_LIMITED_API */
|
||||
|
||||
/* Get the current thread state.
|
||||
|
||||
|
|
@ -309,12 +67,6 @@ PyAPI_FUNC(PyThreadState *) PyThreadState_Get(void);
|
|||
See also PyThreadState_Get() and _PyThreadState_GET(). */
|
||||
#define PyThreadState_GET() PyThreadState_Get()
|
||||
|
||||
#ifndef Py_LIMITED_API
|
||||
/* Similar to PyThreadState_Get(), but don't issue a fatal error
|
||||
* if it is NULL. */
|
||||
PyAPI_FUNC(PyThreadState *) _PyThreadState_UncheckedGet(void);
|
||||
#endif /* !Py_LIMITED_API */
|
||||
|
||||
PyAPI_FUNC(PyThreadState *) PyThreadState_Swap(PyThreadState *);
|
||||
PyAPI_FUNC(PyObject *) PyThreadState_GetDict(void);
|
||||
PyAPI_FUNC(int) PyThreadState_SetAsyncExc(unsigned long, PyObject *);
|
||||
|
|
@ -365,41 +117,11 @@ PyAPI_FUNC(void) PyGILState_Release(PyGILState_STATE);
|
|||
*/
|
||||
PyAPI_FUNC(PyThreadState *) PyGILState_GetThisThreadState(void);
|
||||
|
||||
|
||||
#ifndef Py_LIMITED_API
|
||||
/* Helper/diagnostic function - return 1 if the current thread
|
||||
currently holds the GIL, 0 otherwise.
|
||||
|
||||
The function returns 1 if _PyGILState_check_enabled is non-zero. */
|
||||
PyAPI_FUNC(int) PyGILState_Check(void);
|
||||
|
||||
/* Get the single PyInterpreterState used by this process' GILState
|
||||
implementation.
|
||||
|
||||
This function doesn't check for error. Return NULL before _PyGILState_Init()
|
||||
is called and after _PyGILState_Fini() is called.
|
||||
|
||||
See also _PyInterpreterState_Get() and _PyInterpreterState_GET_UNSAFE(). */
|
||||
PyAPI_FUNC(PyInterpreterState *) _PyGILState_GetInterpreterStateUnsafe(void);
|
||||
#endif /* !Py_LIMITED_API */
|
||||
|
||||
|
||||
/* The implementation of sys._current_frames() Returns a dict mapping
|
||||
thread id to that thread's current frame.
|
||||
*/
|
||||
#ifndef Py_LIMITED_API
|
||||
PyAPI_FUNC(PyObject *) _PyThread_CurrentFrames(void);
|
||||
#endif
|
||||
|
||||
/* Routines for advanced debuggers, requested by David Beazley.
|
||||
Don't use unless you know what you are doing! */
|
||||
#ifndef Py_LIMITED_API
|
||||
PyAPI_FUNC(PyInterpreterState *) PyInterpreterState_Main(void);
|
||||
PyAPI_FUNC(PyInterpreterState *) PyInterpreterState_Head(void);
|
||||
PyAPI_FUNC(PyInterpreterState *) PyInterpreterState_Next(PyInterpreterState *);
|
||||
PyAPI_FUNC(PyThreadState *) PyInterpreterState_ThreadHead(PyInterpreterState *);
|
||||
PyAPI_FUNC(PyThreadState *) PyThreadState_Next(PyThreadState *);
|
||||
|
||||
typedef struct _frame *(*PyThreadFrameGetter)(PyThreadState *self_);
|
||||
# define Py_CPYTHON_PYSTATE_H
|
||||
# include "cpython/pystate.h"
|
||||
# undef Py_CPYTHON_PYSTATE_H
|
||||
#endif
|
||||
|
||||
#ifdef __cplusplus
|
||||
|
|
|
|||
Loading…
Reference in New Issue