mirror of https://github.com/python/cpython
57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
|
// 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();
|
||
|
|
}
|
||
|
|
}
|