diff options
Diffstat (limited to 'source/blender/bmesh/intern/bmesh_mesh.c')
| -rw-r--r-- | source/blender/bmesh/intern/bmesh_mesh.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/source/blender/bmesh/intern/bmesh_mesh.c b/source/blender/bmesh/intern/bmesh_mesh.c index c0cd2e31753..0f97321d9b9 100644 --- a/source/blender/bmesh/intern/bmesh_mesh.c +++ b/source/blender/bmesh/intern/bmesh_mesh.c @@ -412,14 +412,16 @@ static void mesh_verts_calc_normals_accum_cb(void *userdata, MempoolIterData *mp * It also assumes that collisions between threads are highly unlikely, * else performances would be quite bad here. */ float virtual_lock = v_no[0]; - for (virtual_lock = v_no[0]; - (virtual_lock == FLT_MAX) || (atomic_cas_float(&v_no[0], virtual_lock, FLT_MAX) != virtual_lock); - virtual_lock = v_no[0]) - { + while (true) { /* This loops until following conditions are met: * - v_no[0] has same value as virtual_lock (i.e. it did not change since last try). - * - v_no_[0] was not FLT_MAX, i.e. it was not locked by another thread. + * - v_no[0] was not FLT_MAX, i.e. it was not locked by another thread. */ + const float vl = atomic_cas_float(&v_no[0], virtual_lock, FLT_MAX); + if (vl == virtual_lock && vl != FLT_MAX) { + break; + } + virtual_lock = vl; } BLI_assert(v_no[0] == FLT_MAX); /* Now we own that normal value, and can change it. |