Add support for ringbuffer sinks

Change-Id: I766db654cf185addc0046db4757a251b9333ec49

src/KDSpdSetup/details.cpp

@@ -216,4 +216,16 @@ auto genFromWinStr(toml::string &&typeStr) -> spdlog::sink_ptr
 }
 #endif
 
+auto genFromRingBufferStr(toml::string &&typeStr, std::size_t const nItems) -> spdlog::sink_ptr
+{
+    if (typeStr == "ringbuffer_sink_st") {
+        return createRingBufferSinkStPtr(nItems);
+    }
+    if (typeStr == "ringbuffer_sink_mt") {
+        return createRingBufferSinkMtPtr(nItems);
+    }
+
+    return nullptr;
+}
+
 } // namespace KDSPDSetup::details

src/KDSpdSetup/details.h

@@ -28,6 +28,7 @@
 #elif _WIN32
 #include <spdlog/sinks/msvc_sink.h>
 #endif
+#include <spdlog/sinks/ringbuffer_sink.h>
 
 #include <toml.hpp>
 
@@ -93,6 +94,8 @@ static auto const linuxStrs{ std::vector<std::string>{ "syslog_sink_st", "syslog
  */
 static auto const winStrs{ std::vector<std::string>{ "msvc_sink_st", "msvc_sink_mt" } };
 
+static auto const ringBufferStrs{ std::vector<std::string>{ "ringbuffer_sink_st", "ringbuffer_sink_mt" } };
+
 /**
  * @brief A simple map associating strings of `spdlog::level::level_enum` names to the enums themselves.
  * Used to pass an enum to `spdlog::logger::set_level` given a string read from a TOML table.
@@ -312,6 +315,10 @@ class SPDMaps
 #define createMsvcSinkMtPtr createMsvcSinkPtr<std::mutex>
 #endif
 
+#define createRingBufferSinkStPtr createRingBufferSinkPtr<spdlog::details::null_mutex>
+
+#define createRingBufferSinkMtPtr createRingBufferSinkPtr<std::mutex>
+
 /**
  * @brief Returns true if a string `typeStr` is present in a vector `strList`, and false if not.
  * Used to identify a group to which a sink's `type` belongs when reading from a configuration file.
@@ -574,6 +581,12 @@ auto createMsvcSinkPtr() -> std::shared_ptr<spdlog::sinks::msvc_sink<Mutex>>
 }
 #endif
 
+template<typename Mutex>
+auto createRingBufferSinkPtr(std::size_t const nItems) -> std::shared_ptr<spdlog::sinks::ringbuffer_sink<Mutex>>
+{
+    return std::make_shared<spdlog::sinks::ringbuffer_sink<Mutex>>(nItems);
+}
+
 /**
  * @brief Return the result of calling KDSPDSetup::details::createFileSinkPtr with the correct template argument
  * based on the value of `typeStr`. Uses macros `createFileSinkStPtr` and `createFileSinkMtPtr` for clarity.
@@ -651,4 +664,6 @@ auto genFromWinStr(toml::string &&typeStr) -> spdlog::sink_ptr;
 
 #endif
 
+auto genFromRingBufferStr(toml::string &&typeStr, const std::size_t nItems) -> spdlog::sink_ptr;
+
 } // namespace KDSPDSetup::details

src/KDSpdSetup/setup.cpp

@@ -48,7 +48,7 @@ void setupSink(toml::table &&sinkTable)
     auto typeStr = sinkTable.at("type").as_string();
 
     bool ok = false;
-    for (auto &typeList : { details::fileStrs, details::rotateStrs, details::dailyStrs, details::nullStrs, details::stdStrs, details::linuxStrs, details::winStrs }) {
+    for (auto &typeList : { details::fileStrs, details::rotateStrs, details::dailyStrs, details::nullStrs, details::stdStrs, details::linuxStrs, details::winStrs, details::ringBufferStrs }) {
         if (details::inTypelist(typeStr, typeList)) {
             ok = true;
             break;
@@ -86,6 +86,11 @@ void setupSink(toml::table &&sinkTable)
 #endif
     }
 
+    else if (details::inTypelist(typeStr, details::ringBufferStrs)) {
+        auto const nItems = static_cast<size_t>(sinkTable.at("n_items").as_integer());
+        sinkPtr = details::genFromRingBufferStr(std::move(typeStr), nItems);
+    }
+
     if (level != "") {
         if (!details::levelMap.contains(level))
             throw std::out_of_range("KDSPDSetup: level "s + level.str + " not found"s);