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authorClaudio Ciccani <klan@directfb.org>2007-07-01 12:24:44 +0200
committerClaudio Ciccani <klan@directfb.org>2007-07-01 12:24:44 +0200
commita49570794ab12b42633ecf94faad28abdcbb5bbd (patch)
treeff68a78ff563ca1758e652a9a89488d7f3c1e97e
parent33da6cb133dfcfa434a1360123ecf683af329fa0 (diff)
Compute the amount of time to sleep on idle event using timers as reference.
-rw-r--r--src/glut/directfb/callback.c68
-rw-r--r--src/glut/directfb/events.c11
-rw-r--r--src/glut/directfb/internal.h1
3 files changed, 55 insertions, 25 deletions
diff --git a/src/glut/directfb/callback.c b/src/glut/directfb/callback.c
index 38cfccbd4f..4f23441167 100644
--- a/src/glut/directfb/callback.c
+++ b/src/glut/directfb/callback.c
@@ -28,14 +28,13 @@
typedef void (GLUTCALLBACK *__GlutTimerCallback) ( int value );
typedef struct __GlutTimer_s {
- unsigned int interval;
+ struct timeval interval;
struct timeval expire;
__GlutTimerCallback func;
int value;
struct __GlutTimer_s *next;
- struct __GlutTimer_s *prev;
} __GlutTimer;
/*****************************************************************************/
@@ -207,8 +206,7 @@ glutIdleFunc( void (GLUTCALLBACK *func) (void) )
void GLUTAPIENTRY
glutTimerFunc( unsigned int msec, void (GLUTCALLBACK *func) (int value), int value )
{
- __GlutTimer *timer;
- struct timeval now;
+ __GlutTimer *timer;
if (!func)
return;
@@ -217,24 +215,19 @@ glutTimerFunc( unsigned int msec, void (GLUTCALLBACK *func) (int value), int val
if (!timer)
__glutFatalError( "out of memory" );
- gettimeofday( &now, NULL );
-
- timer->interval = msec;
- timer->expire.tv_sec = now.tv_sec + (now.tv_usec/1000 + msec) / 1000;
- timer->expire.tv_usec = (now.tv_usec + msec*1000) % 1000000;
+ timer->interval.tv_sec = msec / 1000;
+ timer->interval.tv_usec = (msec % 1000) * 1000;
+
+ gettimeofday( &timer->expire, NULL );
+ timer->expire.tv_usec += timer->interval.tv_usec;
+ timer->expire.tv_sec += timer->interval.tv_sec + timer->expire.tv_usec/1000000;
+ timer->expire.tv_usec %= 1000000;
timer->func = func;
timer->value = value;
- if (g_timers) {
- timer->prev = g_timers->prev;
- g_timers->prev->next = timer;
- g_timers->prev = timer;
- }
- else {
- g_timers = timer;
- g_timers->prev = timer;
- }
+ timer->next = g_timers;
+ g_timers = timer;
}
@@ -254,12 +247,41 @@ __glutHandleTimers( void )
g_idle = GL_FALSE;
cur->func( cur->value );
-
- cur->expire.tv_sec += (cur->expire.tv_usec/1000 + cur->interval) / 1000;
- cur->expire.tv_usec = (cur->expire.tv_usec + cur->interval*1000) % 1000000;
+
+ cur->expire.tv_usec += cur->interval.tv_usec;
+ cur->expire.tv_sec += cur->interval.tv_sec + cur->expire.tv_usec/1000000;
+ cur->expire.tv_usec %= 1000000;
}
}
-}
+}
+
+
+GLboolean
+__glutGetTimeout( int *ret_msec )
+{
+ __GlutTimer *cur;
+ struct timeval *time = NULL;
+ struct timeval now;
+
+ for (cur = g_timers; cur; cur = cur->next) {
+ if (time == NULL ||
+ time->tv_sec > cur->expire.tv_sec ||
+ (time->tv_sec == cur->expire.tv_sec &&
+ time->tv_usec > cur->expire.tv_usec)) {
+ time = &cur->expire;
+ }
+ }
+
+ if (time == NULL)
+ return GL_FALSE;
+
+ gettimeofday( &now, NULL );
+
+ *ret_msec = (time->tv_sec - now.tv_sec) * 1000 +
+ (time->tv_usec - now.tv_usec + 500) / 1000;
+
+ return GL_TRUE;
+}
void
@@ -275,4 +297,4 @@ __glutFreeTimers( void )
g_timers = NULL;
}
-
+
diff --git a/src/glut/directfb/events.c b/src/glut/directfb/events.c
index 4c474710ab..6ebdd166ac 100644
--- a/src/glut/directfb/events.c
+++ b/src/glut/directfb/events.c
@@ -435,13 +435,14 @@ glutMainLoop( void )
{
__glutAssert( events != NULL );
+ __glutHandleWindows();
+
while (GL_TRUE) {
DFBEvent evt, prev;
g_idle = GL_TRUE;
__glutHandleTimers();
- __glutHandleWindows();
prev.clazz = DFEC_NONE;
@@ -471,13 +472,19 @@ glutMainLoop( void )
__glutHandleTimers();
}
+ __glutHandleWindows();
+
if (g_idle) {
if (idle_func) {
idle_func();
}
else {
+ int msec;
__glutSetWindow( NULL );
- usleep( 500 );
+ if (__glutGetTimeout( &msec ))
+ events->WaitForEventWithTimeout( events, msec/1000, msec%1000 );
+ else
+ events->WaitForEvent( events );
}
}
}
diff --git a/src/glut/directfb/internal.h b/src/glut/directfb/internal.h
index bc3e20e93e..47311c9342 100644
--- a/src/glut/directfb/internal.h
+++ b/src/glut/directfb/internal.h
@@ -124,6 +124,7 @@ extern void __glutDestroyWindow( __GlutWindow *window );
extern void __glutDestroyWindows( void );
/* callback.c */
extern void __glutHandleTimers( void );
+extern GLboolean __glutGetTimeout( int *ret_msec );
extern void __glutFreeTimers( void );