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Eli Zaretskii authored
* src/thread.h (m_getcjmp): New member of 'struct thread_state'. (getcjmp): Define to current thread's 'm_getcjmp'. * src/thread.c (maybe_reacquire_global_lock): Switch to main thread, since this is called from a SIGINT handler, which always runs in the context of the main thread. * src/lisp.h (sys_jmp_buf, sys_setjmp, sys_longjmp): Move the definitions before thread.h is included, as thread.h now uses sys_jmp_buf. * src/keyboard.c (getcjmp): Remove declaration. (read_char): Don't call maybe_reacquire_global_lock here. (handle_interrupt): Call maybe_reacquire_global_lock here, if invoked from the SIGINT handler, to make sure quit_throw_to_read_char runs with main thread's Lisp bindings and uses the main thread's jmp_buf buffer. (Bug#28630)
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