From 5786543669501d7e7e64f57ae85fec8f72b51326 Mon Sep 17 00:00:00 2001
From: Boris Zbarsky <bzbarsky@apple.com>
Date: Wed, 6 Sep 2023 12:44:36 -0400
Subject: [PATCH] Stop using dispatch_get_current_queue. (#29075)

This function is deprecated.
---
 src/platform/Darwin/PlatformManagerImpl.cpp | 16 +++++++++++++++-
 src/platform/Darwin/PlatformManagerImpl.h   | 12 +-----------
 2 files changed, 16 insertions(+), 12 deletions(-)

diff --git a/src/platform/Darwin/PlatformManagerImpl.cpp b/src/platform/Darwin/PlatformManagerImpl.cpp
index bf2dde3d4fe360..69a95c44673b05 100644
--- a/src/platform/Darwin/PlatformManagerImpl.cpp
+++ b/src/platform/Darwin/PlatformManagerImpl.cpp
@@ -163,9 +163,23 @@ bool PlatformManagerImpl::_IsChipStackLockedByCurrentThread() const
 };
 #endif
 
+static int sPlatformManagerKey; // We use pointer to this as key.
+
+dispatch_queue_t PlatformManagerImpl::GetWorkQueue()
+{
+    if (mWorkQueue == nullptr)
+    {
+        mWorkQueue = dispatch_queue_create(CHIP_CONTROLLER_QUEUE, DISPATCH_QUEUE_SERIAL_WITH_AUTORELEASE_POOL);
+        dispatch_suspend(mWorkQueue);
+        dispatch_queue_set_specific(mWorkQueue, &sPlatformManagerKey, this, nullptr);
+        mIsWorkQueueSuspended = true;
+    }
+    return mWorkQueue;
+}
+
 bool PlatformManagerImpl::IsWorkQueueCurrentQueue() const
 {
-    return dispatch_get_current_queue() == mWorkQueue;
+    return dispatch_get_specific(&sPlatformManagerKey) == this;
 }
 
 CHIP_ERROR PlatformManagerImpl::StartBleScan(BleScannerDelegate * delegate)
diff --git a/src/platform/Darwin/PlatformManagerImpl.h b/src/platform/Darwin/PlatformManagerImpl.h
index 79da67a4991d2f..2dfa9104e0dab3 100644
--- a/src/platform/Darwin/PlatformManagerImpl.h
+++ b/src/platform/Darwin/PlatformManagerImpl.h
@@ -45,17 +45,7 @@ class PlatformManagerImpl final : public PlatformManager, public Internal::Gener
 public:
     // ===== Platform-specific members that may be accessed directly by the application.
 
-    dispatch_queue_t GetWorkQueue()
-    {
-        if (mWorkQueue == nullptr)
-        {
-            mWorkQueue = dispatch_queue_create(CHIP_CONTROLLER_QUEUE, DISPATCH_QUEUE_SERIAL_WITH_AUTORELEASE_POOL);
-            dispatch_suspend(mWorkQueue);
-            mIsWorkQueueSuspended = true;
-        }
-        return mWorkQueue;
-    }
-
+    dispatch_queue_t GetWorkQueue();
     bool IsWorkQueueCurrentQueue() const;
 
     CHIP_ERROR StartBleScan(BleScannerDelegate * delegate = nullptr);