[core] Naive atomic type for ARMv5

std::atomic<bool> is implemented lock free which doesn't work
on ARMv5 and seems like the compiler is generating bogus code.

This workaround is a naive implementation using regular mutexes.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/mbgl/geometry/glyph_atlas.hpp b/src/mbgl/geometry/glyph_atlas.hpp
index d4a51761a1..d3e2a62199 100644
--- a/src/mbgl/geometry/glyph_atlas.hpp
+++ b/src/mbgl/geometry/glyph_atlas.hpp
@@ -2,6 +2,7 @@
 
 #include <mbgl/geometry/binpack.hpp>
 #include <mbgl/text/glyph_store.hpp>
+#include <mbgl/util/atomic.hpp>
 #include <mbgl/util/noncopyable.hpp>
 #include <mbgl/util/optional.hpp>
 #include <mbgl/gl/gl.hpp>
@@ -11,7 +12,6 @@
 #include <set>
 #include <unordered_map>
 #include <mutex>
-#include <atomic>
 
 namespace mbgl {
 
@@ -53,7 +53,7 @@ private:
     BinPack<uint16_t> bin;
     std::unordered_map<FontStack, std::map<uint32_t, GlyphValue>, FontStackHash> index;
     const std::unique_ptr<uint8_t[]> data;
-    std::atomic<bool> dirty;
+    util::Atomic<bool> dirty;
     mbgl::optional<gl::UniqueTexture> texture;
 };