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bpo-35081: Add _PyThreadState_GET() internal macro (GH-10266)

Browse source 
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.
This commit is contained in:
Victor Stinner 2018-11-01 01:51:40 +01:00 • committed by GitHub
parent 27e2d1f219
commit 50b48572d9
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
20 changed files with 144 additions and 104 deletions
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2
Python/_warnings.c
View file

@ -671,7 +671,7 @@ setup_context(Py_ssize_t stack_level, PyObject **filename, int *lineno,
PyObject *globals;
/* Setup globals, filename and lineno. */
PyFrameObject *f = PyThreadState_GET()->frame;
PyFrameObject *f = _PyThreadState_GET()->frame;
// Stack level comparisons to Python code is off by one as there is no
// warnings-related stack level to avoid.
if (stack_level <= 0 || is_internal_frame(f)) {

50
Python/ceval.c
View file

@ -157,7 +157,7 @@ PyEval_InitThreads(void)
if (gil_created())
return;
create_gil();
take_gil(PyThreadState_GET());
take_gil(_PyThreadState_GET());
_PyRuntime.ceval.pending.main_thread = PyThread_get_thread_ident();
if (!_PyRuntime.ceval.pending.lock)
_PyRuntime.ceval.pending.lock = PyThread_allocate_lock();
@ -175,7 +175,7 @@ _PyEval_FiniThreads(void)
void
PyEval_AcquireLock(void)
{
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
if (tstate == NULL)
Py_FatalError("PyEval_AcquireLock: current thread state is NULL");
take_gil(tstate);
@ -185,10 +185,10 @@ void
PyEval_ReleaseLock(void)
{
/* This function must succeed when the current thread state is NULL.
We therefore avoid PyThreadState_GET() which dumps a fatal error
We therefore avoid PyThreadState_Get() which dumps a fatal error
in debug mode.
*/
drop_gil(PyThreadState_GET());
drop_gil(_PyThreadState_GET());
}
void
@ -222,7 +222,7 @@ PyEval_ReleaseThread(PyThreadState *tstate)
void
PyEval_ReInitThreads(void)
{
PyThreadState *current_tstate = PyThreadState_GET();
PyThreadState *current_tstate = _PyThreadState_GET();
if (!gil_created())
return;
@ -462,7 +462,7 @@ Py_SetRecursionLimit(int new_limit)
int
_Py_CheckRecursiveCall(const char *where)
{
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
int recursion_limit = _PyRuntime.ceval.recursion_limit;
#ifdef USE_STACKCHECK
@ -543,7 +543,7 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag)
int oparg; /* Current opcode argument, if any */
PyObject **fastlocals, **freevars;
PyObject *retval = NULL; /* Return value */
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
PyCodeObject *co;
/* when tracing we set things up so that
@ -3702,7 +3702,7 @@ _PyEval_EvalCodeWithName(PyObject *_co, PyObject *globals, PyObject *locals,
}
/* Create the frame */
tstate = PyThreadState_GET();
tstate = _PyThreadState_GET();
assert(tstate != NULL);
f = _PyFrame_New_NoTrack(tstate, co, globals, locals);
if (f == NULL) {
@ -4003,7 +4003,7 @@ do_raise(PyObject *exc, PyObject *cause)
if (exc == NULL) {
/* Reraise */
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
_PyErr_StackItem *exc_info = _PyErr_GetTopmostException(tstate);
PyObject *tb;
type = exc_info->exc_type;
@ -4275,7 +4275,7 @@ call_trace(Py_tracefunc func, PyObject *obj,
PyObject *
_PyEval_CallTracing(PyObject *func, PyObject *args)
{
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
int save_tracing = tstate->tracing;
int save_use_tracing = tstate->use_tracing;
PyObject *result;
@ -4329,7 +4329,7 @@ maybe_call_line_trace(Py_tracefunc func, PyObject *obj,
void
PyEval_SetProfile(Py_tracefunc func, PyObject *arg)
{
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
PyObject *temp = tstate->c_profileobj;
Py_XINCREF(arg);
tstate->c_profilefunc = NULL;
@ -4346,7 +4346,7 @@ PyEval_SetProfile(Py_tracefunc func, PyObject *arg)
void
PyEval_SetTrace(Py_tracefunc func, PyObject *arg)
{
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
PyObject *temp = tstate->c_traceobj;
_Py_TracingPossible += (func != NULL) - (tstate->c_tracefunc != NULL);
Py_XINCREF(arg);
@ -4366,21 +4366,21 @@ void
_PyEval_SetCoroutineOriginTrackingDepth(int new_depth)
{
assert(new_depth >= 0);
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
tstate->coroutine_origin_tracking_depth = new_depth;
}
int
_PyEval_GetCoroutineOriginTrackingDepth(void)
{
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
return tstate->coroutine_origin_tracking_depth;
}
void
_PyEval_SetCoroutineWrapper(PyObject *wrapper)
{
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
Py_XINCREF(wrapper);
Py_XSETREF(tstate->coroutine_wrapper, wrapper);
@ -4389,14 +4389,14 @@ _PyEval_SetCoroutineWrapper(PyObject *wrapper)
PyObject *
_PyEval_GetCoroutineWrapper(void)
{
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
return tstate->coroutine_wrapper;
}
void
_PyEval_SetAsyncGenFirstiter(PyObject *firstiter)
{
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
Py_XINCREF(firstiter);
Py_XSETREF(tstate->async_gen_firstiter, firstiter);
@ -4405,14 +4405,14 @@ _PyEval_SetAsyncGenFirstiter(PyObject *firstiter)
PyObject *
_PyEval_GetAsyncGenFirstiter(void)
{
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
return tstate->async_gen_firstiter;
}
void
_PyEval_SetAsyncGenFinalizer(PyObject *finalizer)
{
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
Py_XINCREF(finalizer);
Py_XSETREF(tstate->async_gen_finalizer, finalizer);
@ -4421,7 +4421,7 @@ _PyEval_SetAsyncGenFinalizer(PyObject *finalizer)
PyObject *
_PyEval_GetAsyncGenFinalizer(void)
{
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
return tstate->async_gen_finalizer;
}
@ -4465,7 +4465,7 @@ PyEval_GetGlobals(void)
PyFrameObject *
PyEval_GetFrame(void)
{
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
return _PyThreadState_GetFrame(tstate);
}
@ -4566,11 +4566,11 @@ call_function(PyObject ***pp_stack, Py_ssize_t oparg, PyObject *kwnames)
presumed to be the most frequent callable object.
*/
if (PyCFunction_Check(func)) {
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
C_TRACE(x, _PyCFunction_FastCallKeywords(func, stack, nargs, kwnames));
}
else if (Py_TYPE(func) == &PyMethodDescr_Type) {
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
if (nargs > 0 && tstate->use_tracing) {
/* We need to create a temporary bound method as argument
for profiling.
@ -4640,12 +4640,12 @@ do_call_core(PyObject *func, PyObject *callargs, PyObject *kwdict)
PyObject *result;
if (PyCFunction_Check(func)) {
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
C_TRACE(result, PyCFunction_Call(func, callargs, kwdict));
return result;
}
else if (Py_TYPE(func) == &PyMethodDescr_Type) {
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
Py_ssize_t nargs = PyTuple_GET_SIZE(callargs);
if (nargs > 0 && tstate->use_tracing) {
/* We need to create a temporary bound method as argument

8
Python/context.c
View file

@ -112,7 +112,7 @@ PyContext_Enter(PyObject *octx)
return -1;
}
PyThreadState *ts = PyThreadState_GET();
PyThreadState *ts = _PyThreadState_GET();
assert(ts != NULL);
ctx->ctx_prev = (PyContext *)ts->context; /* borrow */
@ -138,7 +138,7 @@ PyContext_Exit(PyObject *octx)
return -1;
}
PyThreadState *ts = PyThreadState_GET();
PyThreadState *ts = _PyThreadState_GET();
assert(ts != NULL);
if (ts->context != (PyObject *)ctx) {
@ -178,7 +178,7 @@ PyContextVar_Get(PyObject *ovar, PyObject *def, PyObject **val)
ENSURE_ContextVar(ovar, -1)
PyContextVar *var = (PyContextVar *)ovar;
PyThreadState *ts = PyThreadState_GET();
PyThreadState *ts = _PyThreadState_GET();
assert(ts != NULL);
if (ts->context == NULL) {
goto not_found;
@ -382,7 +382,7 @@ context_new_from_vars(PyHamtObject *vars)
static inline PyContext *
context_get(void)
{
PyThreadState *ts = PyThreadState_GET();
PyThreadState *ts = _PyThreadState_GET();
assert(ts != NULL);
PyContext *current_ctx = (PyContext *)ts->context;
if (current_ctx == NULL) {

12
Python/errors.c
View file

@ -28,7 +28,7 @@ _Py_IDENTIFIER(stderr);
void
PyErr_Restore(PyObject *type, PyObject *value, PyObject *traceback)
{
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
PyObject *oldtype, *oldvalue, *oldtraceback;
if (traceback != NULL && !PyTraceBack_Check(traceback)) {
@ -82,7 +82,7 @@ _PyErr_CreateException(PyObject *exception, PyObject *value)
void
PyErr_SetObject(PyObject *exception, PyObject *value)
{
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
PyObject *exc_value;
PyObject *tb = NULL;
@ -175,7 +175,7 @@ PyErr_SetString(PyObject *exception, const char *string)
PyObject* _Py_HOT_FUNCTION
PyErr_Occurred(void)
{
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
return tstate == NULL ? NULL : tstate->curexc_type;
}
@ -334,7 +334,7 @@ PyErr_NormalizeException(PyObject **exc, PyObject **val, PyObject **tb)
void
PyErr_Fetch(PyObject **p_type, PyObject **p_value, PyObject **p_traceback)
{
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
*p_type = tstate->curexc_type;
*p_value = tstate->curexc_value;
@ -354,7 +354,7 @@ PyErr_Clear(void)
void
PyErr_GetExcInfo(PyObject **p_type, PyObject **p_value, PyObject **p_traceback)
{
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
_PyErr_StackItem *exc_info = _PyErr_GetTopmostException(tstate);
*p_type = exc_info->exc_type;
@ -371,7 +371,7 @@ void
PyErr_SetExcInfo(PyObject *p_type, PyObject *p_value, PyObject *p_traceback)
{
PyObject *oldtype, *oldvalue, *oldtraceback;
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
oldtype = tstate->exc_info->exc_type;
oldvalue = tstate->exc_info->exc_value;

8
Python/pylifecycle.c
View file

@ -530,7 +530,7 @@ _Py_InitializeCore_impl(PyInterpreterState **interp_p,
/* bpo-34008: For backward compatibility reasons, calling Py_Main() after
Py_Initialize() ignores the new configuration. */
if (_PyRuntime.core_initialized) {
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
if (!tstate) {
return _Py_INIT_ERR("failed to read thread state");
}
@ -1009,7 +1009,7 @@ Py_FinalizeEx(void)
wait_for_thread_shutdown();
/* Get current thread state and interpreter pointer */
tstate = PyThreadState_GET();
tstate = _PyThreadState_GET();
interp = tstate->interp;
/* The interpreter is still entirely intact at this point, and the
@ -1406,7 +1406,7 @@ Py_EndInterpreter(PyThreadState *tstate)
{
PyInterpreterState *interp = tstate->interp;
if (tstate != PyThreadState_GET())
if (tstate != _PyThreadState_GET())
Py_FatalError("Py_EndInterpreter: thread is not current");
if (tstate->frame != NULL)
Py_FatalError("Py_EndInterpreter: thread still has a frame");
@ -1928,7 +1928,7 @@ fatal_error(const char *prefix, const char *msg, int status)
and holds the GIL */
PyThreadState *tss_tstate = PyGILState_GetThisThreadState();
if (tss_tstate != NULL) {
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
if (tss_tstate != tstate) {
/* The Python thread does not hold the GIL */
tss_tstate = NULL;

18
Python/pystate.c
View file

@ -307,7 +307,7 @@ _PyInterpreterState_DeleteExceptMain()
PyInterpreterState *
_PyInterpreterState_Get(void)
{
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
if (tstate == NULL) {
Py_FatalError("_PyInterpreterState_Get(): no current thread state");
}
@ -689,7 +689,7 @@ tstate_delete_common(PyThreadState *tstate)
void
PyThreadState_Delete(PyThreadState *tstate)
{
if (tstate == PyThreadState_GET())
if (tstate == _PyThreadState_GET())
Py_FatalError("PyThreadState_Delete: tstate is still current");
if (_PyRuntime.gilstate.autoInterpreterState &&
PyThread_tss_get(&_PyRuntime.gilstate.autoTSSkey) == tstate)
@ -703,7 +703,7 @@ PyThreadState_Delete(PyThreadState *tstate)
void
PyThreadState_DeleteCurrent()
{
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
if (tstate == NULL)
Py_FatalError(
"PyThreadState_DeleteCurrent: no current tstate");
@ -758,14 +758,14 @@ _PyThreadState_DeleteExcept(PyThreadState *tstate)
PyThreadState *
_PyThreadState_UncheckedGet(void)
{
return PyThreadState_GET();
return _PyThreadState_GET();
}
PyThreadState *
PyThreadState_Get(void)
{
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
if (tstate == NULL)
Py_FatalError("PyThreadState_Get: no current thread");
@ -776,7 +776,7 @@ PyThreadState_Get(void)
PyThreadState *
PyThreadState_Swap(PyThreadState *newts)
{
PyThreadState *oldts = PyThreadState_GET();
PyThreadState *oldts = _PyThreadState_GET();
_PyThreadState_SET(newts);
/* It should not be possible for more than one thread state
@ -807,7 +807,7 @@ PyThreadState_Swap(PyThreadState *newts)
PyObject *
PyThreadState_GetDict(void)
{
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
if (tstate == NULL)
return NULL;
@ -958,7 +958,7 @@ PyThreadState_IsCurrent(PyThreadState *tstate)
{
/* Must be the tstate for this thread */
assert(PyGILState_GetThisThreadState()==tstate);
return tstate == PyThreadState_GET();
return tstate == _PyThreadState_GET();
}
/* Internal initialization/finalization functions called by
@ -1085,7 +1085,7 @@ PyGILState_Check(void)
return 1;
}
tstate = PyThreadState_GET();
tstate = _PyThreadState_GET();
if (tstate == NULL)
return 0;

2
Python/symtable.c
View file

@ -265,7 +265,7 @@ PySymtable_BuildObject(mod_ty mod, PyObject *filename, PyFutureFeatures *future)
st->st_future = future;
/* Setup recursion depth check counters */
tstate = PyThreadState_GET();
tstate = _PyThreadState_GET();
if (!tstate) {
PySymtable_Free(st);
return NULL;

18
Python/sysmodule.c
View file

@ -336,7 +336,7 @@ PyDoc_STRVAR(excepthook_doc,
static PyObject *
sys_exc_info(PyObject *self, PyObject *noargs)
{
_PyErr_StackItem *err_info = _PyErr_GetTopmostException(PyThreadState_GET());
_PyErr_StackItem *err_info = _PyErr_GetTopmostException(_PyThreadState_GET());
return Py_BuildValue(
"(OOO)",
err_info->exc_type != NULL ? err_info->exc_type : Py_None,
@ -565,7 +565,7 @@ function call. See the debugger chapter in the library manual."
static PyObject *
sys_gettrace(PyObject *self, PyObject *args)
{
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
PyObject *temp = tstate->c_traceobj;
if (temp == NULL)
@ -603,7 +603,7 @@ and return. See the profiler chapter in the library manual."
static PyObject *
sys_getprofile(PyObject *self, PyObject *args)
{
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
PyObject *temp = tstate->c_profileobj;
if (temp == NULL)
@ -722,7 +722,7 @@ sys_setrecursionlimit(PyObject *self, PyObject *args)
the new low-water mark. Otherwise it may not be possible anymore to
reset the overflowed flag to 0. */
mark = _Py_RecursionLimitLowerWaterMark(new_limit);
tstate = PyThreadState_GET();
tstate = _PyThreadState_GET();
if (tstate->recursion_depth >= mark) {
PyErr_Format(PyExc_RecursionError,
"cannot set the recursion limit to %i at "
@ -1362,7 +1362,7 @@ purposes only."
static PyObject *
sys_getframe(PyObject *self, PyObject *args)
{
PyFrameObject *f = PyThreadState_GET()->frame;
PyFrameObject *f = _PyThreadState_GET()->frame;
int depth = -1;
if (!PyArg_ParseTuple(args, "|i:_getframe", &depth))
@ -1745,7 +1745,7 @@ static int
_PySys_ReadPreInitOptions(void)
{
/* Rerun the add commands with the actual sys module available */
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
if (tstate == NULL) {
/* Still don't have a thread state, so something is wrong! */
return -1;
@ -1796,7 +1796,7 @@ get_warnoptions(void)
void
PySys_ResetWarnOptions(void)
{
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
if (tstate == NULL) {
_clear_preinit_entries(&_preinit_warnoptions);
return;
@ -1835,7 +1835,7 @@ PySys_AddWarnOptionUnicode(PyObject *option)
void
PySys_AddWarnOption(const wchar_t *s)
{
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
if (tstate == NULL) {
_append_preinit_entry(&_preinit_warnoptions, s);
return;
@ -1922,7 +1922,7 @@ error:
void
PySys_AddXOption(const wchar_t *s)
{
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
if (tstate == NULL) {
_append_preinit_entry(&_preinit_xoptions, s);
return;

6
Python/thread_nt.h
View file

@ -189,7 +189,7 @@ PyThread_start_new_thread(void (*func)(void *), void *arg)
return PYTHREAD_INVALID_THREAD_ID;
obj->func = func;
obj->arg = arg;
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
size_t stacksize = tstate ? tstate->interp->pythread_stacksize : 0;
hThread = (HANDLE)_beginthreadex(0,
Py_SAFE_DOWNCAST(stacksize, Py_ssize_t, unsigned int),
@ -334,13 +334,13 @@ _pythread_nt_set_stacksize(size_t size)
{
/* set to default */
if (size == 0) {
PyThreadState_GET()->interp->pythread_stacksize = 0;
_PyInterpreterState_GET_UNSAFE()->pythread_stacksize = 0;
return 0;
}
/* valid range? */
if (size >= THREAD_MIN_STACKSIZE && size < THREAD_MAX_STACKSIZE) {
PyThreadState_GET()->interp->pythread_stacksize = size;
_PyInterpreterState_GET_UNSAFE()->pythread_stacksize = size;
return 0;
}

6
Python/thread_pthread.h
View file

@ -174,7 +174,7 @@ PyThread_start_new_thread(void (*func)(void *), void *arg)
return PYTHREAD_INVALID_THREAD_ID;
#endif
#if defined(THREAD_STACK_SIZE)
PyThreadState *tstate = PyThreadState_GET();
PyThreadState *tstate = _PyThreadState_GET();
size_t stacksize = tstate ? tstate->interp->pythread_stacksize : 0;
tss = (stacksize != 0) ? stacksize : THREAD_STACK_SIZE;
if (tss != 0) {
@ -591,7 +591,7 @@ _pythread_pthread_set_stacksize(size_t size)
/* set to default */
if (size == 0) {
PyThreadState_GET()->interp->pythread_stacksize = 0;
_PyInterpreterState_GET_UNSAFE()->pythread_stacksize = 0;
return 0;
}
@ -608,7 +608,7 @@ _pythread_pthread_set_stacksize(size_t size)
rc = pthread_attr_setstacksize(&attrs, size);
pthread_attr_destroy(&attrs);
if (rc == 0) {
PyThreadState_GET()->interp->pythread_stacksize = size;
_PyInterpreterState_GET_UNSAFE()->pythread_stacksize = size;
return 0;
}
}