func initAndLock(initsigs bool) *Lock {
// Lock the current goroutine to the current OS thread, until we have
// released the GIL (as CPython uses per-thread state)
runtime.LockOSThread()
// Initialize the default Python interpreter
if initsigs {
C.Py_InitializeEx(1)
} else {
C.Py_InitializeEx(0)
}
// Enable Python thread support, and then immediately release the GIL (and
// thus "deativate" and per-thread state associated with the current thread
C.PyEval_InitThreads()
C.PyEval_SaveThread()
// We can now unlock the current goroutine from the current OS thread, as
// there is no active per-thread state
runtime.UnlockOSThread()
// Now that Python is setup, we can return a locked Lock, ready for the
// calling code to use
return NewLock()
}
// Initialize initializes the python interpreter and its GIL
func Initialize() error {
// make sure the python interpreter has been initialized
if C.Py_IsInitialized() == 0 {
C.Py_Initialize()
}
if C.Py_IsInitialized() == 0 {
return fmt.Errorf("python: could not initialize the python interpreter")
}
// make sure the GIL is correctly initialized
if C.PyEval_ThreadsInitialized() == 0 {
C.PyEval_InitThreads()
}
if C.PyEval_ThreadsInitialized() == 0 {
return fmt.Errorf("python: could not initialize the GIL")
}
return nil
}
func threadInit() (defaultThreadState *C.PyThreadState) {
initLock.Lock()
defer initLock.Unlock()
if !initialized {
C.Py_InitializeEx(0)
C.PyEval_InitThreads()
C.PySys_SetArgvEx(0, nil, 0)
pyEmptyTuple = C.PyTuple_New(0)
falseObject = &object{C.False_INCREF()}
trueObject = &object{C.True_INCREF()}
defaultThreadState = C.PyEval_SaveThread()
initialized = true
}
return
}
func init() {
log.Debug("> Initilize Python.")
runtime.LockOSThread()
if C.Py_IsInitialized() == 0 {
C.Py_Initialize()
}
if C.Py_IsInitialized() == 0 {
panic(fmt.Errorf("python: could not initialize the python interpreter"))
}
// make sure the GIL is correctly initialized
if C.PyEval_ThreadsInitialized() == 0 {
C.PyEval_InitThreads()
}
if C.PyEval_ThreadsInitialized() == 0 {
panic(fmt.Errorf("python: could not initialize the GIL"))
}
log.Debug("< Initilized Python.")
_tstate := C.PyGILState_GetThisThreadState()
C.PyEval_ReleaseThread(_tstate)
}
func InitThreads() {
C.PyEval_InitThreads()
}