From 7cc4b1701aa2923573adabceed486229abba5a2d Mon Sep 17 00:00:00 2001
From: Dan Engelbrecht <dan.engelbrecht@epicgames.com>
Date: Fri, 20 Mar 2026 13:44:00 +0100
Subject: add hub instance info (#869)

- Improvement: Hub module listing now includes per-instance process metrics (memory, CPU time, working set, pagefile usage)
- Improvement: Hub now monitors provisioned instance health in the background and refreshes process metrics periodically
- Improvement: Hub no longer exposes raw `StorageServerInstance` pointers to callers; instance state is returned as value snapshots (`Hub::InstanceInfo`)
- Improvement: Hub instance access is now guarded by RAII per-instance locks (`SharedLockedPtr`/`ExclusiveLockedPtr`), preventing concurrent modifications during provisioning and deprovisioning
- Improvement: Hub instance lifecycle is now tracked as a `HubInstanceState` enum covering transitional states (Provisioning, Deprovisioning, Hibernating, Waking); exposed as a string in the HTTP API and dashboard
---
 src/zencore/thread.cpp | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'src/zencore/thread.cpp')

diff --git a/src/zencore/thread.cpp b/src/zencore/thread.cpp
index 54459cbaa..f74791333 100644
--- a/src/zencore/thread.cpp
+++ b/src/zencore/thread.cpp
@@ -146,6 +146,12 @@ RwLock::AcquireShared() noexcept
 	m_Mutex.lock_shared();
 }
 
+bool
+RwLock::TryAcquireShared() noexcept
+{
+	return m_Mutex.try_lock_shared();
+}
+
 void
 RwLock::ReleaseShared() noexcept
 {
@@ -158,6 +164,12 @@ RwLock::AcquireExclusive() noexcept
 	m_Mutex.lock();
 }
 
+bool
+RwLock::TryAcquireExclusive() noexcept
+{
+	return m_Mutex.try_lock();
+}
+
 void
 RwLock::ReleaseExclusive() noexcept
 {
-- 
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