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#include <mbgl/map/backend_scope.hpp>
#include <mbgl/map/backend.hpp>
#include <mbgl/util/thread_local.hpp>
#include <cassert>
namespace mbgl {
static util::ThreadLocal<BackendScope> currentScope;
BackendScope::BackendScope(Backend& backend_)
: priorScope(currentScope.get()),
nextScope(nullptr),
backend(backend_) {
if (priorScope) {
assert(priorScope->nextScope == nullptr);
priorScope->nextScope = this;
}
backend.activate();
currentScope.set(this);
}
BackendScope::~BackendScope() {
assert(nextScope == nullptr);
if (priorScope) {
priorScope->backend.activate();
currentScope.set(priorScope);
assert(priorScope->nextScope == this);
priorScope->nextScope = nullptr;
} else {
backend.deactivate();
currentScope.set(nullptr);
}
}
} // namespace mbgl
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