Task scheduler: Use restrict pointer qualifier

Those pointers are never to be aliased, so let's be explicit about this and hope
compiler does save some CPU ticks.

3 files changed, 16 insertions, 7 deletions

diff --git a/source/blender/blenlib/BLI_task.h b/source/blender/blenlib/BLI_task.h
index 52f32c2999f..1285e24e567 100644
--- a/source/blender/blenlib/BLI_task.h
+++ b/source/blender/blenlib/BLI_task.h
@@ -143,10 +143,11 @@ typedef struct ParallelRangeTLS {
 	void *userdata_chunk;
 } ParallelRangeTLS;
 
-typedef void (*TaskParallelRangeFunc)(void *userdata,
+typedef void (*TaskParallelRangeFunc)(void *__restrict userdata,
                                       const int iter,
-                                      const ParallelRangeTLS *tls);
-typedef void (*TaskParallelRangeFuncFinalize)(void *userdata, void *userdata_chunk);
+                                      const ParallelRangeTLS *__restrict tls);
+typedef void (*TaskParallelRangeFuncFinalize)(void *__restrict userdata,
+                                              void *__restrict userdata_chunk);
 
 typedef struct ParallelRangeSettings {
 	/* Whether caller allows to do threading of the particular range.
diff --git a/source/blender/blenlib/intern/BLI_kdopbvh.c b/source/blender/blenlib/intern/BLI_kdopbvh.c
index 03784e31eee..55667d19f76 100644
--- a/source/blender/blenlib/intern/BLI_kdopbvh.c
+++ b/source/blender/blenlib/intern/BLI_kdopbvh.c
@@ -798,7 +798,10 @@ typedef struct BVHDivNodesData {
 	int first_of_next_level;
 } BVHDivNodesData;
 
-static void non_recursive_bvh_div_nodes_task_cb(void *userdata, const int j, const ParallelRangeTLS *UNUSED(tls))
+static void non_recursive_bvh_div_nodes_task_cb(
+        void *__restrict userdata,
+        const int j,
+        const ParallelRangeTLS *__restrict UNUSED(tls))
 {
 	BVHDivNodesData *data = userdata;
 
@@ -1282,7 +1285,10 @@ int BLI_bvhtree_overlap_thread_num(const BVHTree *tree)
 	return (int)MIN2(tree->tree_type, tree->nodes[tree->totleaf]->totnode);
 }
 
-static void bvhtree_overlap_task_cb(void *userdata, const int j, const ParallelRangeTLS *UNUSED(tls))
+static void bvhtree_overlap_task_cb(
+        void *__restrict userdata,
+        const int j,
+        const ParallelRangeTLS *__restrict UNUSED(tls))
 {
 	BVHOverlapData_Thread *data = &((BVHOverlapData_Thread *)userdata)[j];
 	BVHOverlapData_Shared *data_shared = data->shared;
diff --git a/source/blender/blenlib/intern/math_statistics.c b/source/blender/blenlib/intern/math_statistics.c
index 14e3aaea053..3a19f1d3603 100644
--- a/source/blender/blenlib/intern/math_statistics.c
+++ b/source/blender/blenlib/intern/math_statistics.c
@@ -46,8 +46,10 @@ typedef struct CovarianceData {
 	int nbr_cos_vn;
 } CovarianceData;
 
-static void covariance_m_vn_ex_task_cb(void *userdata, const int a,
-                                       const ParallelRangeTLS *UNUSED(tls))
+static void covariance_m_vn_ex_task_cb(
+        void *__restrict userdata,
+        const int a,
+        const ParallelRangeTLS *__restrict UNUSED(tls))
 {
 	CovarianceData *data = userdata;
 	const float *cos_vn = data->cos_vn;