Also add warning comment about threading implementations without matching
atomics implementation to the atomics fallback implementation.
---
configure | 1 +
libavutil/atomic.c | 4 +++-
2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/configure b/configure
index 292da47..841c39a 100755
--- a/configure
+++ b/configure
@@ -1606,6 +1606,7 @@ atomics_gcc_if="sync_val_compare_and_swap"
atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
atomics_win32_if="MemoryBarrier"
atomics_native_if_any="$ATOMICS_LIST"
+w32threads_deps="atomics_native"
threads_if_any="$THREADS_LIST"
# subsystems
diff --git a/libavutil/atomic.c b/libavutil/atomic.c
index e4fa957..cae63fc 100644
--- a/libavutil/atomic.c
+++ b/libavutil/atomic.c
@@ -97,8 +97,10 @@ void *avpriv_atomic_ptr_cas(void * volatile *ptr, void
*oldval, void *newval)
return *ptr;
}
-#else
+#else /* HAVE_THREADS */
+/* This should never trigger, unless a new threading implementation
+ * without corresponding atomics implementation is added. */
#error "Threading is enabled, but there is no implementation of atomic
operations available"
#endif /* HAVE_PTHREADS */
--
1.8.3.2
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