ipa: add missing thread-safety annotations

The raspberrypi IPA is missing thread-safety annotations, which breaks
the build.

Add required thread-safety annotations.

../src/ipa/raspberrypi/controller/metadata.h:108:31: error: mutex
  'mutex_' is still held at the end of function [-Werror,-Wthread-safety-analysis]
        void lock() { mutex_.lock(); }
                                     ^
../src/ipa/raspberrypi/controller/metadata.h:108:23: note: mutex
  acquired here
        void lock() { mutex_.lock(); }
                             ^
../src/ipa/raspberrypi/controller/metadata.h:109:25: error: releasing
  mutex 'mutex_' that was not held [-Werror,-Wthread-safety-analysis]
        void unlock() { mutex_.unlock(); }
                               ^

Signed-off-by: Nicholas Roth <nicholas@rothemail.net>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Naushir Patuck <naush@raspberrypi.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/src/ipa/raspberrypi/controller/metadata.h b/src/ipa/raspberrypi/controller/metadata.h
index 0f7ebfaf..870b6e26 100644
--- a/src/ipa/raspberrypi/controller/metadata.h
+++ b/src/ipa/raspberrypi/controller/metadata.h
@@ -13,9 +13,11 @@
 #include <mutex>
 #include <string>
 
+#include <libcamera/base/thread_annotations.h>
+
 namespace RPiController {
 
-class Metadata
+class LIBCAMERA_TSA_CAPABILITY("mutex") Metadata
 {
 public:
 	Metadata() = default;
@@ -103,8 +105,8 @@ public:
 	 * locks with the standard lock classes.
 	 * e.g. std::lock_guard<RPiController::Metadata> lock(metadata)
 	 */
-	void lock() { mutex_.lock(); }
-	void unlock() { mutex_.unlock(); }
+	void lock() LIBCAMERA_TSA_ACQUIRE() { mutex_.lock(); }
+	void unlock() LIBCAMERA_TSA_RELEASE() { mutex_.unlock(); }
 
 private:
 	mutable std::mutex mutex_;