mirror of https://github.com/python/cpython.git
57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
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// To enable signal handling, the embedder should:
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// 1. set Module.Py_EmscriptenSignalBuffer = some_shared_array_buffer;
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// 2. set the Py_EMSCRIPTEN_SIGNAL_HANDLING flag to 1 as follows:
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// Module.HEAP8[Module._Py_EMSCRIPTEN_SIGNAL_HANDLING] = 1
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//
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// The address &Py_EMSCRIPTEN_SIGNAL_HANDLING is exported as
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// Module._Py_EMSCRIPTEN_SIGNAL_HANDLING.
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#include <emscripten.h>
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#include "Python.h"
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EM_JS(int, _Py_CheckEmscriptenSignals_Helper, (void), {
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if (!Module.Py_EmscriptenSignalBuffer) {
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return 0;
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}
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try {
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let result = Module.Py_EmscriptenSignalBuffer[0];
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Module.Py_EmscriptenSignalBuffer[0] = 0;
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return result;
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} catch(e) {
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#if !defined(NDEBUG)
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console.warn("Error occurred while trying to read signal buffer:", e);
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#endif
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return 0;
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}
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});
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EMSCRIPTEN_KEEPALIVE int Py_EMSCRIPTEN_SIGNAL_HANDLING = 0;
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void
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_Py_CheckEmscriptenSignals(void)
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{
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if (!Py_EMSCRIPTEN_SIGNAL_HANDLING) {
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return;
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}
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int signal = _Py_CheckEmscriptenSignals_Helper();
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if (signal) {
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PyErr_SetInterruptEx(signal);
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}
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}
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#define PY_EMSCRIPTEN_SIGNAL_INTERVAL 50
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static int emscripten_signal_clock = PY_EMSCRIPTEN_SIGNAL_INTERVAL;
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void
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_Py_CheckEmscriptenSignalsPeriodically(void)
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{
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if (!Py_EMSCRIPTEN_SIGNAL_HANDLING) {
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return;
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}
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emscripten_signal_clock--;
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if (emscripten_signal_clock == 0) {
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emscripten_signal_clock = PY_EMSCRIPTEN_SIGNAL_INTERVAL;
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_Py_CheckEmscriptenSignals();
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}
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}
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