Avoid relying on struct timespec

CMakeLists.txt

@@ -204,13 +204,6 @@ IF(CMAKE_COMPILER_IS_GNUCC)
     SET(CMAKE_REQUIRED_FLAGS "${OLD_REQUIRED_FLAGS}")
 ENDIF()
 
-# Check if we have a proper timespec declaration
-CHECK_STRUCT_HAS_MEMBER("struct timespec" tv_sec time.h HAVE_STRUCT_TIMESPEC)
-IF(HAVE_STRUCT_TIMESPEC)
-    # Define it here so we don't have to include config.h for it
-    SET(CPP_DEFS ${CPP_DEFS} HAVE_STRUCT_TIMESPEC)
-ENDIF()
-
 # Some systems may need libatomic for C11 atomic functions to work
 SET(OLD_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES})
 SET(CMAKE_REQUIRED_LIBRARIES ${OLD_REQUIRED_LIBRARIES} atomic)

examples/almultireverb.c

@@ -452,7 +452,7 @@ int main(int argc, char **argv)
         EFX_REVERB_PRESET_CARPETEDHALLWAY,
         EFX_REVERB_PRESET_BATHROOM
     };
-    struct timespec basetime;
+    unsigned int basetime;
     ALCdevice *device = NULL;
     ALCcontext *context = NULL;
     ALuint effects[2] = { 0, 0 };
@@ -633,14 +633,14 @@ int main(int argc, char **argv)
     assert(alGetError()==AL_NO_ERROR && "Failed to setup sound source");
 
     /* Get the current time as the base for timing in the main loop. */
-    altimespec_get(&basetime, AL_TIME_UTC);
+    basetime = altime_get();
     loops = 0;
     printf("Transition %d of %d...\n", loops+1, MaxTransitions);
 
     /* Play the sound for a while. */
     alSourcePlay(source);
     do {
-        struct timespec curtime;
+        unsigned int curtime;
         ALfloat timediff;
 
         /* Start a batch update, to ensure all changes apply simultaneously. */
@@ -649,9 +649,8 @@ int main(int argc, char **argv)
         /* Get the current time to track the amount of time that passed.
          * Convert the difference to seconds.
          */
-        altimespec_get(&curtime, AL_TIME_UTC);
-        timediff = (ALfloat)(curtime.tv_sec - basetime.tv_sec);
-        timediff += (ALfloat)(curtime.tv_nsec - basetime.tv_nsec) / 1000000000.0f;
+        curtime = altime_get();
+        timediff = (ALfloat)(curtime - basetime) / 1000.0f;
 
         /* Avoid negative time deltas, in case of non-monotonic clocks. */
         if(timediff < 0.0f)
@@ -669,7 +668,7 @@ int main(int argc, char **argv)
                  * time to start a new cycle.
                  */
                 timediff -= 8.0f;
-                basetime.tv_sec += 8;
+                basetime += 8000;
             }
         }
 

examples/common/alhelpers.c

@@ -28,6 +28,7 @@
  * finding an appropriate buffer format, and getting readable strings for
  * channel configs and sample types. */
 
+#include <time.h>
 #include <stdio.h>
 #include <errno.h>
 #include <string.h>
@@ -123,22 +124,21 @@ const char *FormatName(ALenum format)
 #include <windows.h>
 #include <mmsystem.h>
 
-int altimespec_get(struct timespec *ts, int base)
+unsigned int altime_get(void)
 {
-    if(base == AL_TIME_UTC)
-    {
-        union {
-            FILETIME ftime;
-            ULARGE_INTEGER ulint;
-        } systime;
-        GetSystemTimeAsFileTime(&systime.ftime);
-        /* FILETIME is in 100-nanosecond units, or 1/10th of a microsecond. */
-        ts->tv_sec = systime.ulint.QuadPart/10000000;
-        ts->tv_nsec = (systime.ulint.QuadPart%10000000) * 100;
-        return base;
-    }
+    static unsigned int start_time = 0;
+    unsigned int cur_time;
+    union {
+        FILETIME ftime;
+        ULARGE_INTEGER ulint;
+    } systime;
+    GetSystemTimeAsFileTime(&systime.ftime);
+    /* FILETIME is in 100-nanosecond units, or 1/10th of a microsecond. */
+    cur_time = (unsigned int)(systime.ulint.QuadPart/10000);
 
-    return 0;
+    if(!start_time)
+        start_time = cur_time;
+    return cur_time - start_time;
 }
 
 void al_nssleep(unsigned long nsec)
@@ -151,27 +151,26 @@ void al_nssleep(unsigned long nsec)
 #include <sys/time.h>
 #include <time.h>
 
-int altimespec_get(struct timespec *ts, int base)
+unsigned int altime_get(void)
 {
-    if(base == AL_TIME_UTC)
-    {
-        int ret;
-#if _POSIX_TIMERS > 0
-        ret = clock_gettime(CLOCK_REALTIME, ts);
-        if(ret == 0) return base;
-#else /* _POSIX_TIMERS > 0 */
-        struct timeval tv;
-        ret = gettimeofday(&tv, NULL);
-        if(ret == 0)
-        {
-            ts->tv_sec = tv.tv_sec;
-            ts->tv_nsec = tv.tv_usec * 1000;
-            return base;
-        }
-#endif
-    }
+    static unsigned int start_time = 0u;
+    unsigned int cur_time;
 
-    return 0;
+#if _POSIX_TIMERS > 0
+    struct timespec ts;
+    int ret = clock_gettime(CLOCK_REALTIME, ts);
+    if(ret != 0) return 0;
+    cur_time = ts.ts_sec*1000 + ts.ts_nsec/1000000;
+#else /* _POSIX_TIMERS > 0 */
+    struct timeval tv;
+    int ret = gettimeofday(&tv, NULL);
+    if(ret != 0) return 0;
+    cur_time = tv.tv_sec*1000 + tv.tv_usec/1000;
+#endif
+
+    if(!start_time)
+        start_time = cur_time;
+    return cur_time - start_time;
 }
 
 void al_nssleep(unsigned long nsec)

examples/common/alhelpers.h

@@ -1,8 +1,6 @@
 #ifndef ALHELPERS_H
 #define ALHELPERS_H
 
-#include <time.h>
-
 #include "AL/alc.h"
 #include "AL/al.h"
 #include "AL/alext.h"
@@ -19,14 +17,7 @@ int InitAL(char ***argv, int *argc);
 void CloseAL(void);
 
 /* Cross-platform timeget and sleep functions. */
-#ifndef HAVE_STRUCT_TIMESPEC
-struct timespec {
-    time_t tv_sec;
-    long tv_nsec;
-};
-#endif
-#define AL_TIME_UTC 1
-int altimespec_get(struct timespec *ts, int base);
+unsigned int altime_get(void);
 void al_nssleep(unsigned long nsec);
 
 #ifdef __cplusplus