Fixes ticket #12744 ("winapi::set_timer_resolution inadvertently chan…

…ges timer resolution (Windows)")
boostorg · Jan 19, 2017 · b3dd777 · b3dd777
1 parent acce62f
commit b3dd777
Showing 1 changed file with 6 additions and 6 deletions.
diff --git a/include/boost/interprocess/detail/os_thread_functions.hpp b/include/boost/interprocess/detail/os_thread_functions.hpp
@@ -112,17 +112,17 @@ inline bool equal_thread_id(OS_thread_id_t id1, OS_thread_id_t id2)
 //return the system tick in ns
 inline unsigned long get_system_tick_ns()
 {
-   unsigned long curres;
-   winapi::set_timer_resolution(10000, 0, &curres);
+   unsigned long curres, ignore1, ignore2;
+   winapi::query_timer_resolution(&ignore1, &ignore2, &curres);
    //Windows API returns the value in hundreds of ns
    return (curres - 1ul)*100ul;
 }
 
 //return the system tick in us
 inline unsigned long get_system_tick_us()
 {
-   unsigned long curres;
-   winapi::set_timer_resolution(10000, 0, &curres);
+   unsigned long curres, ignore1, ignore2;
+   winapi::query_timer_resolution(&ignore1, &ignore2, &curres);
    //Windows API returns the value in hundreds of ns
    return (curres - 1ul)/10ul + 1ul;
 }
@@ -132,8 +132,8 @@ typedef unsigned __int64 OS_highres_count_t;
 inline unsigned long get_system_tick_in_highres_counts()
 {
    __int64 freq;
-   unsigned long curres;
-   winapi::set_timer_resolution(10000, 0, &curres);
+   unsigned long curres, ignore1, ignore2;
+   winapi::query_timer_resolution(&ignore1, &ignore2, &curres);
    //Frequency in counts per second
    if(!winapi::query_performance_frequency(&freq)){
       //Tick resolution in ms