Use atomic in timer struct

src/KKdLib/timer.cpp

@@ -51,7 +51,6 @@ void timer::start_of_cycle() {
     if (history_counter >= HISTORY_COUNT)
         history_counter = 0;
 
-    std::unique_lock<std::mutex> u_lock(freq_mtx);
     freq_hist = 1000.0 / (freq / HISTORY_COUNT);
 }
 
@@ -70,17 +69,14 @@ void timer::end_of_cycle() {
 }
 
 double_t timer::get_freq() {
-    std::unique_lock<std::mutex> u_lock(freq_mtx);
     return freq;
 }
 
-void timer::set_freq(double_t freq) {
-    std::unique_lock<std::mutex> u_lock(freq_mtx);
-    this->freq = freq;
+void timer::set_freq(double_t value) {
+    freq = value;
 }
 
 double_t timer::get_freq_hist() {
-    std::unique_lock<std::mutex> u_lock(freq_hist_mtx);
     return freq_hist;
 }
 

src/KKdLib/timer.hpp

@@ -7,7 +7,7 @@
 
 #include "default.hpp"
 #include "waitable_timer.hpp"
-#include <mutex>
+#include <atomic>
 
 #define HISTORY_COUNT 0x08
 
@@ -17,10 +17,8 @@ struct timer {
     LARGE_INTEGER curr_time;
     LARGE_INTEGER prev_time;
     double_t inv_freq;
-    double_t freq;
-    double_t freq_hist;
-    std::mutex freq_mtx;
-    std::mutex freq_hist_mtx;
+    std::atomic<double_t> freq;
+    std::atomic<double_t> freq_hist;
     waitable_timer wait_timer;
 
     timer(double_t freq);
@@ -29,7 +27,7 @@ struct timer {
     void start_of_cycle();
     void end_of_cycle();
     double_t get_freq();
-    void set_freq(double_t freq);
+    void set_freq(double_t value);
     double_t get_freq_hist();
     void reset();
     void sleep(double_t msec);