The process-wide adapter cell and its install/swap semantics. More...
#include <prom/adapter.hpp>#include <prom/null_adapter.hpp>#include <atomic>#include <cstdint>#include <memory>#include <mutex>#include <utility>
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Classes | |
| class | prom::AdapterCell |
| A swappable adapter slot shared by every metric that reads from it. More... | |
Namespaces | |
| namespace | prom |
| namespace | prom::detail |
Portable atomic shared_ptr<const T> exposing just load()/store(). | |
Detailed Description
The process-wide adapter cell and its install/swap semantics.
The adapter no longer lives on each metric — it lives on an AdapterCell (an AdapterSource) that metrics read through. Standalone and scoped metrics share the process-wide cell returned by detail::global_adapter_cell(); a Registry owns its own cell. Install the real backend on a cell and every metric reading from it migrates to the new backend on its next use:
prom::Registry::global()->set_adapter(std::make_shared<my::Backend>(...));
static std::shared_ptr< Registry > global()
The process-wide registry, sharing the global adapter cell and the global decoration.
Definition registry.hpp:147
The default adapter is a NullAdapter, so metrics are always safe to use before any backend is installed.
