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Release the GIL when calling ReadFile

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Kovid Goyal 2020-10-08 16:55:26 +05:30
parent d4ea5f726d
commit 5af81d105c
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1 changed files with 5 additions and 1 deletions
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6
src/calibre/utils/windows/winutilpp.cpp
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@ -192,7 +192,11 @@ winutil_read_file(PyObject *self, PyObject *args) {
PyObject *ans = PyBytes_FromStringAndSize(NULL, chunk_size);
if (!ans) return PyErr_NoMemory();
DWORD bytes_read;
if (!ReadFile(PyLong_AsVoidPtr(handle), PyBytes_AS_STRING(ans), chunk_size, &bytes_read, NULL)) {
BOOL ok;
Py_BEGIN_ALLOW_THREADS;
ok = ReadFile(PyLong_AsVoidPtr(handle), PyBytes_AS_STRING(ans), chunk_size, &bytes_read, NULL);
Py_END_ALLOW_THREADS;
if (!ok) {
Py_DECREF(ans);
return set_error_from_file_handle(PyLong_AsVoidPtr(handle));
}