From 6e500b173377db76c77c27af7496e3619992b4a9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Johannes=20Sch=C3=B6nberger?= <jsch@demuc.de>
Date: Wed, 20 May 2015 20:29:19 -0700
Subject: [PATCH] Do not acquire GIL for shared functions

---
 skimage/_shared/geometry.pxd  | 4 ++--
 skimage/_shared/geometry.pyx  | 5 +++--
 skimage/_shared/transform.pxd | 2 +-
 skimage/_shared/transform.pyx | 2 +-
 4 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/skimage/_shared/geometry.pxd b/skimage/_shared/geometry.pxd
index 3379318c..4524fa37 100644
--- a/skimage/_shared/geometry.pxd
+++ b/skimage/_shared/geometry.pxd
@@ -1,6 +1,6 @@
 cdef unsigned char point_in_polygon(Py_ssize_t nr_verts, double *xp, double *yp,
-                                    double x, double y)
+                                    double x, double y) nogil
 
 cdef void points_in_polygon(Py_ssize_t nr_verts, double *xp, double *yp,
                             Py_ssize_t nr_points, double *x, double *y,
-                            unsigned char *result)
+                            unsigned char *result) nogil
diff --git a/skimage/_shared/geometry.pyx b/skimage/_shared/geometry.pyx
index beb07e14..ea6695a9 100644
--- a/skimage/_shared/geometry.pyx
+++ b/skimage/_shared/geometry.pyx
@@ -5,7 +5,8 @@
 
 
 cdef inline unsigned char point_in_polygon(Py_ssize_t nr_verts, double *xp,
-                                           double *yp, double x, double y):
+                                           double *yp, double x,
+                                           double y) nogil:
     """Test whether point lies inside a polygon.
 
     Parameters
@@ -33,7 +34,7 @@ cdef inline unsigned char point_in_polygon(Py_ssize_t nr_verts, double *xp,
 
 cdef void points_in_polygon(Py_ssize_t nr_verts, double *xp, double *yp,
                             Py_ssize_t nr_points, double *x, double *y,
-                            unsigned char *result):
+                            unsigned char *result) nogil:
     """Test whether points lie inside a polygon.
 
     Parameters
diff --git a/skimage/_shared/transform.pxd b/skimage/_shared/transform.pxd
index 4978e843..b48fe92e 100644
--- a/skimage/_shared/transform.pxd
+++ b/skimage/_shared/transform.pxd
@@ -2,4 +2,4 @@ cimport numpy as cnp
 
 
 cdef float integrate(float[:, ::1] sat, Py_ssize_t r0, Py_ssize_t c0,
-                     Py_ssize_t r1, Py_ssize_t c1)
+                     Py_ssize_t r1, Py_ssize_t c1) nogil
diff --git a/skimage/_shared/transform.pyx b/skimage/_shared/transform.pyx
index d77ec583..cbb40144 100644
--- a/skimage/_shared/transform.pyx
+++ b/skimage/_shared/transform.pyx
@@ -6,7 +6,7 @@ cimport numpy as cnp
 
 
 cdef float integrate(float[:, ::1] sat, Py_ssize_t r0, Py_ssize_t c0,
-                     Py_ssize_t r1, Py_ssize_t c1):
+                     Py_ssize_t r1, Py_ssize_t c1) nogil:
     """
     Using a summed area table / integral image, calculate the sum
     over a given window.