layers: Add threading checking layer

New layer checks for use of objects from multiple threads.

3 files changed, 37 insertions, 0 deletions

diff --git a/layers/CMakeLists.txt b/layers/CMakeLists.txt
index 92f6b2dc..f5ad8f99 100644
--- a/layers/CMakeLists.txt
+++ b/layers/CMakeLists.txt
@@ -90,6 +90,7 @@ add_custom_target(generate_vk_layer_helpers DEPENDS
 run_vk_layer_generate(Generic generic_layer.c)
 run_vk_layer_generate(APIDump api_dump.cpp)
 run_vk_layer_generate(ObjectTracker object_track.c)
+run_vk_layer_generate(Threading threading.cpp)
 
 add_library(layer_utils SHARED layers_config.cpp)
 if (WIN32)
@@ -108,3 +109,4 @@ add_vk_layer(Generic generic_layer.c)
 add_vk_layer(APIDump api_dump.cpp)
 add_vk_layer(ObjectTracker object_track.c)
 add_vk_layer(ParamChecker param_checker.cpp)
+add_vk_layer(ThreadingChecker threading.cpp)
diff --git a/layers/README.md b/layers/README.md
index 449f8926..8198e985 100644
--- a/layers/README.md
+++ b/layers/README.md
@@ -53,6 +53,9 @@ layer/mem\_tracker.c (name=MemTracker) - MemTracker functions mostly as a valida
 ### Check parameters
 <build dir>/layer/param_checker.c (name=ParamChecker) - Check the input parameters to API calls for validity. Currently this only checks ENUM params directly passed to API calls and ENUMs embedded in struct params. If a Dbg callback function is registered, this layer will use callback function(s) for reporting, otherwise uses stdout.
 
+### Check threading
+<build dir>/layer/threading.c (name=Threading) - Check multithreading of API calls for validity. Currently this checks that only one thread at a time uses an object in free-threaded API calls. If a Dbg callback function is registered, this layer will use callback function(s) for reporting, otherwise uses stdout.
+
 ## Using Layers
 
 1. Build VK loader  and i965 icd driver using normal steps (cmake and make)
diff --git a/layers/threading.h b/layers/threading.h
new file mode 100644
index 00000000..8426e396
--- /dev/null
+++ b/layers/threading.h
@@ -0,0 +1,32 @@
+/*
+ * Vulkan
+ *
+ * Copyright (C) 2015 LunarG, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+// Draw State ERROR codes
+typedef enum _THREADING_CHECKER_ERROR
+{
+    THREADING_CHECKER_NONE,                             // Used for INFO & other non-error messages
+    THREADING_CHECKER_MULTIPLE_THREADS,                 // Object used simultaneously by multiple threads
+    THREADING_CHECKER_SINGLE_THREAD_REUSE,              // Object used simultaneously by recursion in single thread
+} THREADING_CHECKER_ERROR;
+