ENH: use SeedSequence to generate entropy for seeding

1 files changed, 27 insertions, 0 deletions

diff --git a/numpy/random/bit_generator.pxd b/numpy/random/bit_generator.pxd
new file mode 100644
index 000000000..846e3d30a
--- /dev/null
+++ b/numpy/random/bit_generator.pxd
@@ -0,0 +1,27 @@
+
+from .common cimport bitgen_t
+cimport numpy as np
+
+cdef class BitGenerator():
+    cdef readonly object _seed_seq
+    cdef readonly object lock
+    cdef bitgen_t _bitgen
+    cdef readonly object _ctypes
+    cdef readonly object _cffi
+    cdef readonly object capsule
+
+
+cdef class SeedSequence():
+    cdef readonly object entropy
+    cdef readonly object program_entropy
+    cdef readonly tuple spawn_key
+    cdef readonly int pool_size
+    cdef readonly object pool
+    cdef readonly int n_children_spawned
+
+    cdef mix_entropy(self, np.ndarray[np.npy_uint32, ndim=1] mixer,
+                     np.ndarray[np.npy_uint32, ndim=1] entropy_array)
+    cdef get_assembled_entropy(self)
+
+cdef class SeedlessSequence():
+    pass