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 VMWARE 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 static struct handle_table *htab = NULL;
  33 static mtx_t htab_lock = _MTX_INITIALIZER_NP;
  34
  35 boolean vlCreateHTAB(void)
  36 {
  37    boolean ret;
  38
  39    /* Make sure handle table handles match VDPAU handles. */
  40    assert(sizeof(unsigned) <= sizeof(vlHandle));
  41    mtx_lock(&htab_lock);
  42    if (!htab)
  43       htab = handle_table_create();
  44    ret = htab != NULL;
  45    mtx_unlock(&htab_lock);
  46    return ret;
  47 }
  48
  49 void vlDestroyHTAB(void)
  50 {
  51    mtx_lock(&htab_lock);
  52    if (htab && !handle_table_get_first_handle(htab)) {
  53       handle_table_destroy(htab);
  54       htab = NULL;
  55    }
  56    mtx_unlock(&htab_lock);
  57 }
  58
  59 vlHandle vlAddDataHTAB(void *data)
  60 {
  61    vlHandle handle = 0;
  62
  63    assert(data);
  64    mtx_lock(&htab_lock);
  65    if (htab)
  66       handle = handle_table_add(htab, data);
  67    mtx_unlock(&htab_lock);
  68    return handle;
  69 }
  70
  71 void* vlGetDataHTAB(vlHandle handle)
  72 {
  73    void *data = NULL;
  74
  75    assert(handle);
  76    mtx_lock(&htab_lock);
  77    if (htab)
  78       data = handle_table_get(htab, handle);
  79    mtx_unlock(&htab_lock);
  80    return data;
  81 }
  82
  83 void vlRemoveDataHTAB(vlHandle handle)
  84 {
  85    mtx_lock(&htab_lock);
  86    if (htab)
  87       handle_table_remove(htab, handle);
  88    mtx_unlock(&htab_lock);
  89 }