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#include <mbgl/util/thread_local.hpp>
#include <mbgl/renderer/backend_scope.hpp>
#include <mbgl/util/logging.hpp>
#include <mbgl/util/run_loop.hpp>
#include <stdexcept>
#include <cassert>
#include <pthread.h>
namespace mbgl {
namespace util {
template <class T>
class ThreadLocal<T>::Impl {
public:
pthread_key_t key;
};
template <class T>
ThreadLocal<T>::ThreadLocal() : impl(std::make_unique<Impl>()) {
int ret = pthread_key_create(&impl->key, [](void *) {});
if (ret) {
throw std::runtime_error("Failed to init local storage key.");
}
}
template <class T>
ThreadLocal<T>::~ThreadLocal() {
// ThreadLocal will not take ownership
// of the pointer it is managing. The pointer
// needs to be explicitly cleared before we
// destroy this object.
assert(!get());
if (pthread_key_delete(impl->key)) {
Log::Error(Event::General, "Failed to delete local storage key.");
assert(false);
}
}
template <class T>
T* ThreadLocal<T>::get() {
auto* ret = reinterpret_cast<T*>(pthread_getspecific(impl->key));
if (!ret) {
return nullptr;
}
return ret;
}
template <class T>
void ThreadLocal<T>::set(T* ptr) {
if (pthread_setspecific(impl->key, ptr)) {
throw std::runtime_error("Failed to set local storage.");
}
}
template class ThreadLocal<RunLoop>;
template class ThreadLocal<BackendScope>;
template class ThreadLocal<int>; // For unit tests
} // namespace util
} // namespace mbgl
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