Do a pointer exchange when replacing the source buffer queue

1 files changed, 16 insertions, 0 deletions

diff --git a/OpenAL32/Include/alMain.h b/OpenAL32/Include/alMain.h
index 454bb715..57eee33d 100644
--- a/OpenAL32/Include/alMain.h
+++ b/OpenAL32/Include/alMain.h
@@ -235,6 +235,10 @@ static __inline int ExchangeInt(volatile int *ptr, int newval)
 {
     return __sync_lock_test_and_set(ptr, newval);
 }
+static __inline void *ExchangePtr(void *volatile*ptr, void *newval)
+{
+    return __sync_lock_test_and_set(ptr, newval);
+}
 static __inline ALboolean CompExchangeInt(volatile int *ptr, int oldval, int newval)
 {
     return __sync_bool_compare_and_swap(ptr, oldval, newval);
@@ -258,6 +262,10 @@ static __inline int ExchangeInt(volatile int *ptr, int newval)
     } u = { ptr };
     return InterlockedExchange(u.l, newval);
 }
+static __inline void *ExchangePtr(void *volatile*ptr, void *newval)
+{
+    return InterlockedExchangePtr(ptr, newval);
+}
 static __inline ALboolean CompExchangeInt(volatile int *ptr, int oldval, int newval)
 {
     union {
@@ -286,6 +294,14 @@ static __inline int ExchangeInt(volatile int *ptr, int newval)
     } while(!OSAtomicCompareAndSwap32Barrier(oldval, newval, ptr));
     return oldval;
 }
+static __inline void *ExchangePtr(void *volatile*ptr, void *newval)
+{
+    void *oldval;
+    do {
+        oldval = *ptr;
+    } while(!OSAtomicCompareAndSwapPtrBarrier(oldval, newval, ptr));
+    return oldval;
+}
 static __inline ALboolean CompExchangeInt(volatile int *ptr, int oldval, int newval)
 {
     return OSAtomicCompareAndSwap32Barrier(oldval, newval, ptr);