From 02285dff81fadeb5b78b3eac884e911f12f81258 Mon Sep 17 00:00:00 2001
From: Max Krasnyansky <quic_maxk@quicinc.com>
Date: Mon, 23 Sep 2024 21:18:48 -0700
Subject: [PATCH] threads: fix msvc build without openmp (llama/9615)

We're missing atomic_thread_fence() in MSVC builds when openmp is disabled.
---
 ggml/src/ggml.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/ggml/src/ggml.c b/ggml/src/ggml.c
index 4c55d801..4b782b0c 100644
--- a/ggml/src/ggml.c
+++ b/ggml/src/ggml.c
@@ -135,6 +135,9 @@ static atomic_bool atomic_flag_test_and_set(atomic_flag * ptr) {
 static void atomic_flag_clear(atomic_flag * ptr) {
     InterlockedExchange(ptr, 0);
 }
+static void atomic_thread_fence(memory_order mo) {
+    MemoryBarrier();
+}
 #else // clang
 #include <stdatomic.h>
 #endif