从C扩展中释放全局锁

PyObject *pyfunc(PyObject *self, PyObject *args) { ... Py_BEGIN_ALLOW_THREADS // Threaded C code. Must not use Python API functions ... Py_END_ALLOW_THREADS ... return result; }

在C扩展代码中，GIL可以通过在代码中插入下面这样的宏来释放和重新获取：

#include "Python.h"
...

PyObject *pyfunc(PyObject *self, PyObject *args) {
   ...
   Py_BEGIN_ALLOW_THREADS
   // Threaded C code.  Must not use Python API functions
   ...
   Py_END_ALLOW_THREADS
   ...
   return result;
}