From 6ed15a6fd6254ce74a73b782ecc7d78f52de90dd Mon Sep 17 00:00:00 2001
From: Ryan Houdek <Sonicadvance1@gmail.com>
Date: Sat, 25 Oct 2025 17:00:46 -0700
Subject: [PATCH] Windows: Implement support for SRWLock shared

Exclusive was already implemented.
---
 Source/Windows/Common/WinAPI/Sync.cpp | 12 ++++++++++++
 Source/Windows/include/winternl.h     |  3 +++
 2 files changed, 15 insertions(+)

diff --git a/Source/Windows/Common/WinAPI/Sync.cpp b/Source/Windows/Common/WinAPI/Sync.cpp
index 0b5532d34..aff3bf156 100644
--- a/Source/Windows/Common/WinAPI/Sync.cpp
+++ b/Source/Windows/Common/WinAPI/Sync.cpp
@@ -28,6 +28,18 @@ void ReleaseSRWLockExclusive(PSRWLOCK SRWLock) {
   RtlReleaseSRWLockExclusive(SRWLock);
 }
 
+void AcquireSRWLockShared(PSRWLOCK SRWLock) {
+  RtlAcquireSRWLockShared(SRWLock);
+}
+
+void ReleaseSRWLockShared(PSRWLOCK SRWLock) {
+  RtlReleaseSRWLockShared(SRWLock);
+}
+
+DLLEXPORT_FUNC(BOOLEAN, TryAcquireSRWLockShared, (PSRWLOCK SRWLock)) {
+  return RtlTryAcquireSRWLockShared(SRWLock);
+}
+
 DLLEXPORT_FUNC(BOOLEAN, TryAcquireSRWLockExclusive, (PSRWLOCK SRWLock)) {
   return RtlTryAcquireSRWLockExclusive(SRWLock);
 }
diff --git a/Source/Windows/include/winternl.h b/Source/Windows/include/winternl.h
index 8eb81921b..04d8282ff 100644
--- a/Source/Windows/include/winternl.h
+++ b/Source/Windows/include/winternl.h
@@ -540,6 +540,9 @@ NTSTATUS WINAPI RtlWow64SetThreadContext(HANDLE, const WOW64_CONTEXT*);
 void WINAPI Wow64ProcessPendingCrossProcessItems(void);
 NTSTATUS WINAPI Wow64SystemServiceEx(UINT, UINT*);
 NTSTATUS WINAPI RtlWow64SuspendThread(HANDLE, ULONG*);
+void WINAPI RtlAcquireSRWLockShared(RTL_SRWLOCK*);
+void WINAPI RtlReleaseSRWLockShared(RTL_SRWLOCK*);
+BOOLEAN WINAPI RtlTryAcquireSRWLockShared(RTL_SRWLOCK*);
 
 #ifdef __cplusplus
 }