From 5e4694abba4236f5cf858a038af7eb3375b77f9c Mon Sep 17 00:00:00 2001
From: Michele Caini <michele.caini@gmail.com>
Date: Fri, 19 May 2023 14:23:56 +0200
Subject: [PATCH] util: uvw_clock_id and gettime

---
 src/uvw/util.cpp  |  6 ++++++
 src/uvw/util.h    | 12 ++++++++++++
 test/uvw/util.cpp |  1 +
 3 files changed, 19 insertions(+)

diff --git a/src/uvw/util.cpp b/src/uvw/util.cpp
index b0390b7b..ccf2ad55 100644
--- a/src/uvw/util.cpp
+++ b/src/uvw/util.cpp
@@ -322,6 +322,12 @@ UVW_INLINE resource_usage utilities::rusage() noexcept {
     return err ? resource_usage{} : ru;
 }
 
+UVW_INLINE timespec64 utilities::gettime(clock_id source) noexcept {
+    timespec64 ts;
+    auto err = uv_clock_gettime(static_cast<uv_clock_id>(source), &ts);
+    return err ? timespec64{} : ts;
+}
+
 UVW_INLINE uint64_t utilities::hrtime() noexcept {
     return uv_hrtime();
 }
diff --git a/src/uvw/util.h b/src/uvw/util.h
index ed8c276e..288e6334 100644
--- a/src/uvw/util.h
+++ b/src/uvw/util.h
@@ -38,6 +38,11 @@ enum class uvw_handle_type : std::underlying_type_t<uv_handle_type> {
     FILE = UV_FILE
 };
 
+enum class uvw_clock_id : std::underlying_type_t<uv_clock_id> {
+    MONOTONIC = UV_CLOCK_MONOTONIC,
+    REALTIME = UV_CLOCK_REALTIME
+};
+
 template<typename T>
 struct uv_type_wrapper {
     using Type = T;
@@ -603,6 +608,13 @@ struct utilities {
      */
     static resource_usage rusage() noexcept;
 
+    /**
+     * @brief Gets the current system time from a high-resolution clock source.
+     * @param source Clock source, either real-time or monotonic.
+     * @return Current system time from the given high-resolution clock source.
+     */
+    static timespec64 gettime(clock_id source) noexcept;
+
     /**
      * @brief Gets the current high-resolution real time.
      *
diff --git a/test/uvw/util.cpp b/test/uvw/util.cpp
index 9a5ba91a..de4d2a9c 100644
--- a/test/uvw/util.cpp
+++ b/test/uvw/util.cpp
@@ -83,6 +83,7 @@ TEST(Util, Utilities) {
     ASSERT_NE(uvw::utilities::total_memory(), decltype(uvw::utilities::total_memory()){0});
     ASSERT_NE(uvw::utilities::uptime(), decltype(uvw::utilities::uptime()){0});
     ASSERT_NO_THROW(uvw::utilities::rusage());
+    ASSERT_NO_THROW(uvw::utilities::gettime(uvw::clock_id::MONOTONIC));
     ASSERT_NE(uvw::utilities::hrtime(), decltype(uvw::utilities::hrtime()){0});
     ASSERT_FALSE(uvw::utilities::path().empty());
     ASSERT_FALSE(uvw::utilities::cwd().empty());