From 9151ce2c0daba3c5368e17f1bc544a4d77c0407c Mon Sep 17 00:00:00 2001
From: Antoine Riard <ariard@student.42.fr>
Date: Fri, 19 Apr 2019 07:48:31 -0400
Subject: [PATCH] Add WITH_LOCK macro: run code while locking a mutex

Results from ryanofksy suggestion on isPotentialTip/
waitForNotifications refactoring
---
 src/sync.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/sync.h b/src/sync.h
index eddd058448..e51fad012b 100644
--- a/src/sync.h
+++ b/src/sync.h
@@ -199,6 +199,16 @@ using DebugLock = UniqueLock<typename std::remove_reference<
         LeaveCritical();                                                       \
     }
 
+//! Run code while locking a mutex.
+//!
+//! Examples:
+//!
+//!   WITH_LOCK(cs, shared_val = shared_val + 1);
+//!
+//!   int val = WITH_LOCK(cs, return shared_val);
+//!
+#define WITH_LOCK(cs, code) [&] { LOCK(cs); code; }()
+
 class CSemaphore {
 private:
     std::condition_variable condition;