src/mesa/drivers/dri/common/vblank.h

   1 /* -*- mode: c; c-basic-offset: 3 -*- */
   2 /*
   3  * (c) Copyright IBM Corporation 2002
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * on the rights to use, copy, modify, merge, publish, distribute, sub
  10  * license, and/or sell copies of the Software, and to permit persons to whom
  11  * the Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the next
  14  * paragraph) shall be included in all copies or substantial portions of the
  15  * Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
  20  * VA LINUX SYSTEM, IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  21  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  22  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  23  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  * Authors:
  26  *    Ian Romanick <idr@us.ibm.com>
  27  */
  28
  29 #ifndef DRI_VBLANK_H
  30 #define DRI_VBLANK_H
  31
  32 #include "main/context.h"
  33 #include "dri_util.h"
  34 #include "xmlconfig.h"
  35
  36 #define VBLANK_FLAG_INTERVAL  (1U << 0)  /* Respect the swap_interval setting
  37                                           */
  38 #define VBLANK_FLAG_THROTTLE  (1U << 1)  /* Wait 1 refresh since last call.
  39                                           */
  40 #define VBLANK_FLAG_SYNC      (1U << 2)  /* Sync to the next refresh.
  41                                           */
  42 #define VBLANK_FLAG_NO_IRQ    (1U << 7)  /* DRM has no IRQ to wait on.
  43                                           */
  44 #define VBLANK_FLAG_SECONDARY (1U << 8)  /* Wait for secondary vblank.
  45                                           */
  46
  47 extern int driGetMSC32( __DRIscreenPrivate * priv, int64_t * count );
  48 extern int driDrawableGetMSC32( __DRIscreenPrivate * priv,
  49                                 __DRIdrawablePrivate * drawablePrivate,
  50                                 int64_t * count);
  51 extern int driWaitForMSC32( __DRIdrawablePrivate *priv,
  52     int64_t target_msc, int64_t divisor, int64_t remainder, int64_t * msc );
  53 extern GLuint driGetDefaultVBlankFlags( const driOptionCache *optionCache );
  54 extern void driDrawableInitVBlank ( __DRIdrawablePrivate *priv );
  55 extern unsigned driGetVBlankInterval( const  __DRIdrawablePrivate *priv );
  56 extern void driGetCurrentVBlank( __DRIdrawablePrivate *priv );
  57 extern int driWaitForVBlank( __DRIdrawablePrivate *priv,
  58                              GLboolean * missed_deadline );
  59
  60 #undef usleep
  61 #include <unistd.h>  /* for usleep() */
  62 #include <sched.h>   /* for sched_yield() */
  63
  64 #ifdef linux
  65 #include <sched.h>   /* for sched_yield() */
  66 #endif
  67
  68 #define DO_USLEEP(nr)                                                   \
  69    do {                                                                 \
  70       if (0) fprintf(stderr, "%s: usleep for %u\n", __FUNCTION__, nr ); \
  71       if (1) usleep( nr );                                              \
  72       sched_yield();                                                    \
  73    } while( 0 )
  74
  75 #endif /* DRI_VBLANK_H */