Merge pull request #458 from raysan5/develop

Integrate develop branch into master

1 files changed, 30 insertions, 6 deletions

diff --git a/src/gestures.h b/src/gestures.h
index f4d38dfb..58f046cb 100644
--- a/src/gestures.h
+++ b/src/gestures.h
@@ -24,7 +24,7 @@
 *
 *   LICENSE: zlib/libpng
 *
-*   Copyright (c) 2014-2017 Ramon Santamaria (@raysan5)
+*   Copyright (c) 2014-2018 Ramon Santamaria (@raysan5)
 *
 *   This software is provided "as-is", without any express or implied warranty. In no event
 *   will the authors be held liable for any damages arising from the use of this software.
@@ -140,17 +140,25 @@ float GetGesturePinchAngle(void);                       // Get gesture pinch ang
 
 #if defined(GESTURES_IMPLEMENTATION)
 
-#include <math.h>               // Required for: atan2(), sqrt()
-#include <stdint.h>             // Required for: uint64_t
-
 #if defined(_WIN32)
     // Functions required to query time on Windows
     int __stdcall QueryPerformanceCounter(unsigned long long int *lpPerformanceCount);
     int __stdcall QueryPerformanceFrequency(unsigned long long int *lpFrequency);
 #elif defined(__linux__)
-    #define _POSIX_C_SOURCE 199309L // Required for CLOCK_MONOTONIC if compiled with c99 without gnu ext.
+    #if _POSIX_C_SOURCE < 199309L
+        #undef _POSIX_C_SOURCE
+        #define _POSIX_C_SOURCE 199309L // Required for CLOCK_MONOTONIC if compiled with c99 without gnu ext.
+    #endif
     #include <sys/time.h>           // Required for: timespec
     #include <time.h>               // Required for: clock_gettime()
+
+    #include <math.h>               // Required for: atan2(), sqrt()
+    #include <stdint.h>             // Required for: uint64_t
+#endif
+
+#if defined(__APPLE__)              // macOS also defines __MACH__
+    #include <mach/clock.h>         // Required for: clock_get_time()
+    #include <mach/mach.h>          // Required for: mach_timespec_t
 #endif
 
 //----------------------------------------------------------------------------------
@@ -514,7 +522,7 @@ static double GetCurrentTime(void)
 #if defined(_WIN32)
     unsigned long long int clockFrequency, currentTime;
     
-    QueryPerformanceFrequency(&clockFrequency);
+    QueryPerformanceFrequency(&clockFrequency);     // BE CAREFUL: Costly operation!
     QueryPerformanceCounter(&currentTime);
     
     time = (double)currentTime/clockFrequency*1000.0f;  // Time in miliseconds
@@ -529,6 +537,22 @@ static double GetCurrentTime(void)
     time = ((double)nowTime/1000000.0);     // Time in miliseconds
 #endif
 
+#if defined(__APPLE__)
+    //#define CLOCK_REALTIME  CALENDAR_CLOCK    // returns UTC time since 1970-01-01
+    //#define CLOCK_MONOTONIC SYSTEM_CLOCK      // returns the time since boot time
+    
+    clock_serv_t cclock;
+    mach_timespec_t now;
+    host_get_clock_service(mach_host_self(), SYSTEM_CLOCK, &cclock);
+    
+    // NOTE: OS X does not have clock_gettime(), using clock_get_time()
+    clock_get_time(cclock, &now);
+    mach_port_deallocate(mach_task_self(), cclock);
+    uint64_t nowTime = (uint64_t)now.tv_sec*1000000000LLU + (uint64_t)now.tv_nsec;     // Time in nanoseconds
+
+    time = ((double)nowTime/1000000.0);     // Time in miliseconds    
+#endif
+
     return time;
 }