[glibmm] Glib::Timer: Add resume() and is_active()

[Kjell Ahlstedt <kjellahl src gnome org>]

commit 85c707d3e77c993ec221f08adffdd0918b60fbc7
Author: Kjell Ahlstedt <kjellahlstedt gmail com>
Date:   Sun May 23 14:58:47 2021 +0200

    Glib::Timer: Add resume() and is_active()
    
    Fixes #87

 glib/glibmm/timer.cc | 12 ++++++++++++
 glib/glibmm/timer.h  | 18 +++++++++++++++++-
 2 files changed, 29 insertions(+), 1 deletion(-)
---
diff --git a/glib/glibmm/timer.cc b/glib/glibmm/timer.cc
index 7f32b183..9e054f56 100644
--- a/glib/glibmm/timer.cc
+++ b/glib/glibmm/timer.cc
@@ -49,6 +49,12 @@ Timer::reset()
   g_timer_reset(gobject_);
 }
 
+void
+Timer::resume()
+{
+  g_timer_continue(gobject_);
+}
+
 double
 Timer::elapsed() const
 {
@@ -61,6 +67,12 @@ Timer::elapsed(unsigned long& microseconds) const
   return g_timer_elapsed(gobject_, &microseconds);
 }
 
+bool
+Timer::is_active() const
+{
+  return g_timer_is_active(gobject_);
+}
+
 void
 usleep(unsigned long microseconds)
 {
diff --git a/glib/glibmm/timer.h b/glib/glibmm/timer.h
index cbb5b444..d94d1362 100644
--- a/glib/glibmm/timer.h
+++ b/glib/glibmm/timer.h
@@ -29,7 +29,7 @@ namespace Glib
 {
 
 /** Portable stop watch interface.
- * This resembles a convient and portable timer with microseconds resolution.
+ * This resembles a convenient and portable timer with microseconds resolution.
  */
 class GLIBMM_API Timer
 {
@@ -48,6 +48,14 @@ public:
   void stop();
   void reset();
 
+  // Can't call it Timer::continue(). continue is a keyword in C and C++.
+  /** Resumes a timer that has previously been stopped with stop().
+   * stop() must be called before using this function.
+   *
+   * @newin{2,70]
+   */
+  void resume();
+
   /** Get the elapsed time.
    * @return The value in seconds.
    */
@@ -59,6 +67,13 @@ public:
    */
   double elapsed(unsigned long& microseconds) const;
 
+  /** Exposes whether the timer is currently active.
+   *
+   * @newin{2,70]
+   * @return <tt>true</tt> if the timer is running, <tt>false</tt> otherwise.
+   */
+  bool is_active() const;
+
 #ifndef DOXYGEN_SHOULD_SKIP_THIS
   GTimer* gobj() { return gobject_; }
   const GTimer* gobj() const { return gobject_; }
@@ -68,6 +83,7 @@ private:
   GTimer* gobject_;
 };
 
+/// Pauses the current thread for the given number of microseconds.
 GLIBMM_API
 void usleep(unsigned long microseconds);