Add some supplementary comments.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/hook.c b/src/hook.c
index 5f10c34..0b58897 100644
--- a/src/hook.c
+++ b/src/hook.c
@@ -442,6 +442,9 @@ static VOID EnterSpinLock(VOID)
     // Wait until the flag is FALSE.
     while (InterlockedCompareExchange(&g_isLocked, TRUE, FALSE) != FALSE)
     {
+        // No need to generate a memory barrier here, since InterlockedCompareExchange()
+        // generates a full memory barrier itself.
+
         // Prevent the loop from being too busy.
         if (spinCount < 32)
             Sleep(0);
@@ -455,6 +458,9 @@ static VOID EnterSpinLock(VOID)
 //-------------------------------------------------------------------------
 static VOID LeaveSpinLock(VOID)
 {
+    // No need to generate a memory barrier here, since InterlockedExchange()
+    // generates a full memory barrier itself.
+
     InterlockedExchange(&g_isLocked, FALSE);
 }