android: video_core: gl_rasterizer_cache: Make cache access thread safe.

src/video_core/renderer_opengl/gl_rasterizer_cache.cpp

@@ -1818,6 +1818,8 @@ void RasterizerCacheOpenGL::ClearAll(bool flush) {
 }
 
 void RasterizerCacheOpenGL::FlushRegion(PAddr addr, u32 size, Surface flush_surface) {
+    std::lock_guard lock{mutex};
+
     if (size == 0)
         return;
 
@@ -1854,6 +1856,8 @@ void RasterizerCacheOpenGL::FlushAll() {
 }
 
 void RasterizerCacheOpenGL::InvalidateRegion(PAddr addr, u32 size, const Surface& region_owner) {
+    std::lock_guard lock{mutex};
+
     if (size == 0)
         return;
 
@@ -1930,6 +1934,8 @@ Surface RasterizerCacheOpenGL::CreateSurface(const SurfaceParams& params) {
 }
 
 void RasterizerCacheOpenGL::RegisterSurface(const Surface& surface) {
+    std::lock_guard lock{mutex};
+
     if (surface->registered) {
         return;
     }
@@ -1939,6 +1945,8 @@ void RasterizerCacheOpenGL::RegisterSurface(const Surface& surface) {
 }
 
 void RasterizerCacheOpenGL::UnregisterSurface(const Surface& surface) {
+    std::lock_guard lock{mutex};
+
     if (!surface->registered) {
         return;
     }

src/video_core/renderer_opengl/gl_rasterizer_cache.h

@@ -7,6 +7,7 @@
 #include <array>
 #include <list>
 #include <memory>
+#include <mutex>
 #include <set>
 #include <tuple>
 #ifdef __GNUC__
@@ -325,6 +326,8 @@ private:
 
     std::unordered_map<TextureCubeConfig, CachedTextureCube> texture_cube_cache;
 
+    std::recursive_mutex mutex;
+
 public:
     std::unique_ptr<TextureFilterer> texture_filterer;
     std::unique_ptr<FormatReinterpreterOpenGL> format_reinterpreter;