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py/mpstate: Schedule KeyboardInterrupt on main thread.

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This introduces a new macro to get the main thread and uses it to ensure
that asynchronous exceptions such as KeyboardInterrupt (CTRL+C) are only
scheduled on the main thread. This is more deterministic than being
scheduled on a random thread and is more in line with CPython that only
allow signal handlers to run on the main thread.

Fixes issue #7026.

Signed-off-by: David Lechner <david@pybricks.com>
This commit is contained in:
David Lechner
2021-05-10 22:18:17 -05:00
committed by Damien George
parent ca920f7218
commit 259d9b69fe
6 changed files with 10 additions and 7 deletions
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py/mpstate.h
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@@ -285,12 +285,13 @@ extern mp_state_ctx_t mp_state_ctx;
#define MP_STATE_VM(x) (mp_state_ctx.vm.x)
#define MP_STATE_MEM(x) (mp_state_ctx.mem.x)
#define MP_STATE_MAIN_THREAD(x) (mp_state_ctx.thread.x)
#if MICROPY_PY_THREAD
extern mp_state_thread_t *mp_thread_get_state(void);
#define MP_STATE_THREAD(x) (mp_thread_get_state()->x)
#else
#define MP_STATE_THREAD(x) (mp_state_ctx.thread.x)
#define MP_STATE_THREAD(x) MP_STATE_MAIN_THREAD(x)
#endif
#endif // MICROPY_INCLUDED_PY_MPSTATE_H