API: rearrange the cython files in numpy.random

1 files changed, 54 insertions, 0 deletions

diff --git a/numpy/random/include/aligned_malloc.h b/numpy/random/include/aligned_malloc.h
new file mode 100644
index 000000000..ea24f6d23
--- /dev/null
+++ b/numpy/random/include/aligned_malloc.h
@@ -0,0 +1,54 @@
+#ifndef _RANDOMDGEN__ALIGNED_MALLOC_H_
+#define _RANDOMDGEN__ALIGNED_MALLOC_H_
+
+#include "Python.h"
+#include "numpy/npy_common.h"
+
+#define NPY_MEMALIGN 16 /* 16 for SSE2, 32 for AVX, 64 for Xeon Phi */
+
+static NPY_INLINE void *PyArray_realloc_aligned(void *p, size_t n)
+{
+    void *p1, **p2, *base;
+    size_t old_offs, offs = NPY_MEMALIGN - 1 + sizeof(void *);
+    if (NPY_UNLIKELY(p != NULL))
+    {
+        base = *(((void **)p) - 1);
+        if (NPY_UNLIKELY((p1 = PyMem_Realloc(base, n + offs)) == NULL))
+            return NULL;
+        if (NPY_LIKELY(p1 == base))
+            return p;
+        p2 = (void **)(((Py_uintptr_t)(p1) + offs) & ~(NPY_MEMALIGN - 1));
+        old_offs = (size_t)((Py_uintptr_t)p - (Py_uintptr_t)base);
+        memmove((void *)p2, ((char *)p1) + old_offs, n);
+    }
+    else
+    {
+        if (NPY_UNLIKELY((p1 = PyMem_Malloc(n + offs)) == NULL))
+            return NULL;
+        p2 = (void **)(((Py_uintptr_t)(p1) + offs) & ~(NPY_MEMALIGN - 1));
+    }
+    *(p2 - 1) = p1;
+    return (void *)p2;
+}
+
+static NPY_INLINE void *PyArray_malloc_aligned(size_t n)
+{
+    return PyArray_realloc_aligned(NULL, n);
+}
+
+static NPY_INLINE void *PyArray_calloc_aligned(size_t n, size_t s)
+{
+    void *p;
+    if (NPY_UNLIKELY((p = PyArray_realloc_aligned(NULL, n * s)) == NULL))
+        return NULL;
+    memset(p, 0, n * s);
+    return p;
+}
+
+static NPY_INLINE void PyArray_free_aligned(void *p)
+{
+    void *base = *(((void **)p) - 1);
+    PyMem_Free(base);
+}
+
+#endif