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GH-100000: Cleanup and polish various watchers code (GH-99998)

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* Initialize `type_watchers` array to `NULL`s
* Optimize code watchers notification
* Optimize func watchers notification
This commit is contained in:
Itamar Ostricher 2022-12-14 11:14:16 -08:00 • committed by GitHub
parent aa8591e9ca
commit ae83c78215
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GPG key ID: 4AEE18F83AFDEB23
6 changed files with 37 additions and 14 deletions
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18
Objects/funcobject.c
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@ -12,11 +12,20 @@ static void
notify_func_watchers(PyInterpreterState *interp, PyFunction_WatchEvent event,
PyFunctionObject *func, PyObject *new_value)
{
for (int i = 0; i < FUNC_MAX_WATCHERS; i++) {
PyFunction_WatchCallback cb = interp->func_watchers[i];
if ((cb != NULL) && (cb(event, func, new_value) < 0)) {
PyErr_WriteUnraisable((PyObject *) func);
uint8_t bits = interp->active_func_watchers;
int i = 0;
while (bits) {
assert(i < FUNC_MAX_WATCHERS);
if (bits & 1) {
PyFunction_WatchCallback cb = interp->func_watchers[i];
// callback must be non-null if the watcher bit is set
assert(cb != NULL);
if (cb(event, func, new_value) < 0) {
PyErr_WriteUnraisable((PyObject *) func);
}
}
i++;
bits >>= 1;
}
}
@ -25,6 +34,7 @@ handle_func_event(PyFunction_WatchEvent event, PyFunctionObject *func,
PyObject *new_value)
{
PyInterpreterState *interp = _PyInterpreterState_GET();
assert(interp->_initialized);
if (interp->active_func_watchers) {
notify_func_watchers(interp, event, func, new_value);
}