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#pragma once
#include <functional>
#include <vector>
#include <torch/csrc/Types.h>
typedef std::function<void(PyObject*, PyObject*, bool)> THPCopyFunction;
struct THPCopyInfo {
PyTypeObject* srcType; // Python type of src tensor/storage
THPCopyFunction copy; // copy function
bool non_blocking; // true if copy implements an 'non_blocking' copy
bool broadcast; // true if the copy implements a broadcast copy
};
typedef std::vector<THPCopyInfo> THPCopyList;
inline bool tryTHPCopy(const THPCopyList& v, PyObject* dst, PyObject* src, bool non_blocking, bool broadcast)
{
for (auto& i : v) {
if (i.non_blocking == non_blocking && PyType_IsSubtype(Py_TYPE(src), i.srcType)) {
(i.copy)(dst, src, broadcast);
return true;
}
}
return false;
}
inline bool THPCopy(const THPCopyList& v, PyObject* dst, PyObject* src, bool non_blocking, bool broadcast)
{
if (tryTHPCopy(v, dst, src, non_blocking, broadcast)) {
return true;
} else if (non_blocking && tryTHPCopy(v, dst, src, false, broadcast)) {
return true;
}
THPUtils_setError("copy from %s to %s isn't implemented",
THPUtils_typename(src), THPUtils_typename(dst));
return false;
}
inline PyObject * THPStorageCopyMethod(const THPCopyList& v, PyObject *self, PyObject *args, PyObject *kwargs)
{
PyObject *src;
int non_blocking = 0;
static char *kwlist[] = {"source", "non_blocking", nullptr};
// use int as parse type because bool not available in python2.
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O|i:copy_", kwlist, &src, &non_blocking)) {
return nullptr;
}
if (!THPCopy(v, self, src, non_blocking, false)) {
return nullptr;
}
Py_INCREF(self);
return self;
}
template <typename THPStorageDst, typename THPStorageSrc, typename StorageDst, typename StorageSrc>
void THPInsertStorageCopyFunction(
PyTypeObject *srcType,
THPCopyList& copyList,
void (*copyFunc)(LIBRARY_STATE_TYPE StorageDst* x, StorageSrc* z),
bool non_blocking=false)
{
auto wrapper = [copyFunc](PyObject* dst_, PyObject* src_, bool broadcast) {
auto dst = ((THPStorageDst*)dst_)->cdata;
auto src = ((THPStorageSrc*)src_)->cdata;
PyThreadState *_save = nullptr;
try {
Py_UNBLOCK_THREADS;
copyFunc(LIBRARY_STATE dst, src);
Py_BLOCK_THREADS;
} catch (...) {
if (_save) {
Py_BLOCK_THREADS;
}
throw;
}
};
copyList.push_back({ srcType, wrapper, non_blocking, false });
}
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