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| author | John Firebaugh <john.firebaugh@gmail.com> | 2017-02-17 10:57:21 -0800 |
|---|---|---|
| committer | John Firebaugh <john.firebaugh@gmail.com> | 2017-02-20 12:04:21 -0800 |
| commit | 694159c49ebc15e0d6e92addc31f65b623dbe1f9 (patch) | |
| tree | a98305c85769b4ff16fdf441adeb337e91780bc0 /src | |
| parent | 3ef9e26593bfda1f32bc15d29016d9bb83acb67c (diff) | |
| download | qtlocation-mapboxgl-694159c49ebc15e0d6e92addc31f65b623dbe1f9.tar.gz | |
[core] Nestable BackendScope
Diffstat (limited to 'src')
| -rw-r--r-- | src/mbgl/map/backend_scope.cpp | 26 | ||||
| -rw-r--r-- | src/mbgl/map/map.cpp | 1 |
2 files changed, 27 insertions, 0 deletions
diff --git a/src/mbgl/map/backend_scope.cpp b/src/mbgl/map/backend_scope.cpp new file mode 100644 index 0000000000..302dfd70cf --- /dev/null +++ b/src/mbgl/map/backend_scope.cpp @@ -0,0 +1,26 @@ +#include <mbgl/map/backend_scope.hpp> +#include <mbgl/map/backend.hpp> +#include <mbgl/util/thread_local.hpp> + +namespace mbgl { + +static util::ThreadLocal<Backend> currentBackend; + +BackendScope::BackendScope(Backend& backend_) + : priorBackend(currentBackend.get()), + backend(backend_) { + backend.activate(); + currentBackend.set(&backend); +} + +BackendScope::~BackendScope() { + if (priorBackend) { + priorBackend->activate(); + currentBackend.set(priorBackend); + } else { + backend.deactivate(); + currentBackend.set(nullptr); + } +} + +} // namespace mbgl diff --git a/src/mbgl/map/map.cpp b/src/mbgl/map/map.cpp index 2837a95bc5..82c0a5f901 100644 --- a/src/mbgl/map/map.cpp +++ b/src/mbgl/map/map.cpp @@ -2,6 +2,7 @@ #include <mbgl/map/camera.hpp> #include <mbgl/map/view.hpp> #include <mbgl/map/backend.hpp> +#include <mbgl/map/backend_scope.hpp> #include <mbgl/map/transform.hpp> #include <mbgl/map/transform_state.hpp> #include <mbgl/annotation/annotation_manager.hpp> |