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