src/gallium/state_trackers/vdpau/htab.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2010 Younes Manton.
   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
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include <util/u_handle_table.h>
  29 #include <os/os_thread.h>
  30 #include "vdpau_private.h"
  31
  32 #ifdef VL_HANDLES
  33 static struct handle_table *htab = NULL;
  34 pipe_static_mutex(htab_lock);
  35 #endif
  36
  37 boolean vlCreateHTAB(void)
  38 {
  39 #ifdef VL_HANDLES
  40    boolean ret;
  41    /* Make sure handle table handles match VDPAU handles. */
  42    assert(sizeof(unsigned) <= sizeof(vlHandle));
  43    pipe_mutex_lock(htab_lock);
  44    if (!htab)
  45       htab = handle_table_create();
  46    ret = htab != NULL;
  47    pipe_mutex_unlock(htab_lock);
  48    return ret;
  49 #else
  50    return TRUE;
  51 #endif
  52 }
  53
  54 void vlDestroyHTAB(void)
  55 {
  56 #ifdef VL_HANDLES
  57    pipe_mutex_lock(htab_lock);
  58    if (htab) {
  59       handle_table_destroy(htab);
  60       htab = NULL;
  61    }
  62    pipe_mutex_unlock(htab_lock);
  63 #endif
  64 }
  65
  66 vlHandle vlAddDataHTAB(void *data)
  67 {
  68    assert(data);
  69 #ifdef VL_HANDLES
  70    vlHandle handle = 0;
  71    pipe_mutex_lock(htab_lock);
  72    if (htab)
  73       handle = handle_table_add(htab, data);
  74    pipe_mutex_unlock(htab_lock);
  75    return handle;
  76 #else
  77    return (vlHandle)data;
  78 #endif
  79 }
  80
  81 void* vlGetDataHTAB(vlHandle handle)
  82 {
  83    assert(handle);
  84 #ifdef VL_HANDLES
  85    void *data = NULL;
  86    pipe_mutex_lock(htab_lock);
  87    if (htab)
  88       data = handle_table_get(htab, handle);
  89    pipe_mutex_unlock(htab_lock);
  90    return data;
  91 #else
  92    return (void*)handle;
  93 #endif
  94 }
  95
  96 void vlRemoveDataHTAB(vlHandle handle)
  97 {
  98 #ifdef VL_HANDLES
  99    pipe_mutex_lock(htab_lock);
 100    if (htab)
 101       handle_table_remove(htab, handle);
 102    pipe_mutex_unlock(htab_lock);
 103 #endif
 104 }