src/gallium/auxiliary/pipebuffer/pb_bufmgr_fenced.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., USA
   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 SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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  18  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  19  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  20  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * The above copyright notice and this permission notice (including the
  23  * next paragraph) shall be included in all copies or substantial portions
  24  * of the Software.
  25  *
  26  *
  27  **************************************************************************/
  28
  29 /**
  30  * \file
  31  * A buffer manager that wraps buffers in fenced buffers.
  32  *
  33  * \author Jose Fonseca <jrfonseca@tungstengraphics.dot.com>
  34  */
  35
  36
  37 #include "pipe/p_debug.h"
  38 #include "util/u_memory.h"
  39
  40 #include "pb_buffer.h"
  41 #include "pb_buffer_fenced.h"
  42 #include "pb_bufmgr.h"
  43
  44
  45 struct fenced_pb_manager
  46 {
  47    struct pb_manager base;
  48
  49    struct pb_manager *provider;
  50
  51    struct fenced_buffer_list *fenced_list;
  52 };
  53
  54
  55 static INLINE struct fenced_pb_manager *
  56 fenced_pb_manager(struct pb_manager *mgr)
  57 {
  58    assert(mgr);
  59    return (struct fenced_pb_manager *)mgr;
  60 }
  61
  62
  63 static struct pb_buffer *
  64 fenced_bufmgr_create_buffer(struct pb_manager *mgr,
  65                             size_t size,
  66                             const struct pb_desc *desc)
  67 {
  68    struct fenced_pb_manager *fenced_mgr = fenced_pb_manager(mgr);
  69    struct pb_buffer *buf;
  70    struct pb_buffer *fenced_buf;
  71
  72    /* check for free buffers before allocating new ones */
  73    fenced_buffer_list_check_free(fenced_mgr->fenced_list, 0);
  74
  75    buf = fenced_mgr->provider->create_buffer(fenced_mgr->provider, size, desc);
  76    if(!buf) {
  77       /* try harder to get a buffer */
  78       fenced_buffer_list_check_free(fenced_mgr->fenced_list, 1);
  79
  80       buf = fenced_mgr->provider->create_buffer(fenced_mgr->provider, size, desc);
  81       if(!buf) {
  82          /* give up */
  83          return NULL;
  84       }
  85    }
  86
  87    fenced_buf = fenced_buffer_create(fenced_mgr->fenced_list, buf);
  88    if(!fenced_buf) {
  89       pb_reference(&buf, NULL);
  90    }
  91
  92    return fenced_buf;
  93 }
  94
  95
  96 static void
  97 fenced_bufmgr_flush(struct pb_manager *mgr)
  98 {
  99    struct fenced_pb_manager *fenced_mgr = fenced_pb_manager(mgr);
 100
 101    fenced_buffer_list_check_free(fenced_mgr->fenced_list, TRUE);
 102
 103    assert(fenced_mgr->provider->flush);
 104    if(fenced_mgr->provider->flush)
 105       fenced_mgr->provider->flush(fenced_mgr->provider);
 106 }
 107
 108
 109 static void
 110 fenced_bufmgr_destroy(struct pb_manager *mgr)
 111 {
 112    struct fenced_pb_manager *fenced_mgr = fenced_pb_manager(mgr);
 113
 114    fenced_buffer_list_destroy(fenced_mgr->fenced_list);
 115
 116    if(fenced_mgr->provider)
 117       fenced_mgr->provider->destroy(fenced_mgr->provider);
 118
 119    FREE(fenced_mgr);
 120 }
 121
 122
 123 struct pb_manager *
 124 fenced_bufmgr_create(struct pb_manager *provider,
 125                      struct pb_fence_ops *ops)
 126 {
 127    struct fenced_pb_manager *fenced_mgr;
 128
 129    if(!provider)
 130       return NULL;
 131
 132    fenced_mgr = CALLOC_STRUCT(fenced_pb_manager);
 133    if (!fenced_mgr)
 134       return NULL;
 135
 136    fenced_mgr->base.destroy = fenced_bufmgr_destroy;
 137    fenced_mgr->base.create_buffer = fenced_bufmgr_create_buffer;
 138    fenced_mgr->base.flush = fenced_bufmgr_flush;
 139
 140    fenced_mgr->provider = provider;
 141    fenced_mgr->fenced_list = fenced_buffer_list_create(ops);
 142    if(!fenced_mgr->fenced_list) {
 143       FREE(fenced_mgr);
 144       return NULL;
 145    }
 146
 147    return &fenced_mgr->base;
 148 }