commit a7012a5bfcf26a41b9dd32d4c429004773503dd6
author Chris Kennelly <ckennelly@google.com> Tue Feb 20 07:40:26 2024 -0800
committer Copybara-Service <copybara-worker@google.com> Tue Feb 20 07:41:44 2024 -0800
tree 3202c48a8221a5539227b6650f080b5b6f65b645
parent 14b8a4eac3e5a7b97ba4cc7b7dadf2a85aae8215

Annotate that SpinLock should warn when unused.

This often indicates a bug from adding synchronization logic but not using it.

PiperOrigin-RevId: 608600311
Change-Id: I48bc3ae18b1e9a00b5e2152f33b486cd6be324a1

absl/base/internal/spinlock.h

diff --git a/absl/base/internal/spinlock.h b/absl/base/internal/spinlock.h
index 2929cd6..36f823a 100644
--- a/absl/base/internal/spinlock.h
+++ b/absl/base/internal/spinlock.h
@@ -53,7 +53,7 @@
 ABSL_NAMESPACE_BEGIN
 namespace base_internal {
 
-class ABSL_LOCKABLE SpinLock {
+class ABSL_LOCKABLE ABSL_ATTRIBUTE_WARN_UNUSED SpinLock {
  public:
   SpinLock() : lockword_(kSpinLockCooperative) {
     ABSL_TSAN_MUTEX_CREATE(this, __tsan_mutex_not_static);