1 /************************************************************************** 2 * 3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. 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 /** 29 * \file 30 * Implementation of malloc-based buffers to store data that can't be processed 31 * by the hardware. 32 * 33 * \author Jose Fonseca <jrfonseca (at) tungstengraphics.com> 34 */ 35 36 37 #include "util/u_debug.h" 38 #include "util/u_memory.h" 39 #include "pb_buffer.h" 40 #include "pb_bufmgr.h" 41 42 43 struct malloc_buffer 44 { 45 struct pb_buffer base; 46 void *data; 47 }; 48 49 50 extern const struct pb_vtbl malloc_buffer_vtbl; 51 52 static INLINE struct malloc_buffer * 53 malloc_buffer(struct pb_buffer *buf) 54 { 55 assert(buf); 56 if (!buf) 57 return NULL; 58 assert(buf->vtbl == &malloc_buffer_vtbl); 59 return (struct malloc_buffer *)buf; 60 } 61 62 63 static void 64 malloc_buffer_destroy(struct pb_buffer *buf) 65 { 66 align_free(malloc_buffer(buf)->data); 67 FREE(buf); 68 } 69 70 71 static void * 72 malloc_buffer_map(struct pb_buffer *buf, 73 unsigned flags, 74 void *flush_ctx) 75 { 76 return malloc_buffer(buf)->data; 77 } 78 79 80 static void 81 malloc_buffer_unmap(struct pb_buffer *buf) 82 { 83 /* No-op */ 84 } 85 86 87 static enum pipe_error 88 malloc_buffer_validate(struct pb_buffer *buf, 89 struct pb_validate *vl, 90 unsigned flags) 91 { 92 assert(0); 93 return PIPE_ERROR; 94 } 95 96 97 static void 98 malloc_buffer_fence(struct pb_buffer *buf, 99 struct pipe_fence_handle *fence) 100 { 101 assert(0); 102 } 103 104 105 static void 106 malloc_buffer_get_base_buffer(struct pb_buffer *buf, 107 struct pb_buffer **base_buf, 108 pb_size *offset) 109 { 110 *base_buf = buf; 111 *offset = 0; 112 } 113 114 115 const struct pb_vtbl 116 malloc_buffer_vtbl = { 117 malloc_buffer_destroy, 118 malloc_buffer_map, 119 malloc_buffer_unmap, 120 malloc_buffer_validate, 121 malloc_buffer_fence, 122 malloc_buffer_get_base_buffer 123 }; 124 125 126 struct pb_buffer * 127 pb_malloc_buffer_create(pb_size size, 128 const struct pb_desc *desc) 129 { 130 struct malloc_buffer *buf; 131 132 /* TODO: do a single allocation */ 133 134 buf = CALLOC_STRUCT(malloc_buffer); 135 if(!buf) 136 return NULL; 137 138 pipe_reference_init(&buf->base.reference, 1); 139 buf->base.usage = desc->usage; 140 buf->base.size = size; 141 buf->base.alignment = desc->alignment; 142 buf->base.vtbl = &malloc_buffer_vtbl; 143 144 buf->data = align_malloc(size, desc->alignment < sizeof(void*) ? sizeof(void*) : desc->alignment); 145 if(!buf->data) { 146 FREE(buf); 147 return NULL; 148 } 149 150 return &buf->base; 151 } 152 153 154 static struct pb_buffer * 155 pb_malloc_bufmgr_create_buffer(struct pb_manager *mgr, 156 pb_size size, 157 const struct pb_desc *desc) 158 { 159 return pb_malloc_buffer_create(size, desc); 160 } 161 162 163 static void 164 pb_malloc_bufmgr_flush(struct pb_manager *mgr) 165 { 166 /* No-op */ 167 } 168 169 170 static void 171 pb_malloc_bufmgr_destroy(struct pb_manager *mgr) 172 { 173 /* No-op */ 174 } 175 176 177 static boolean 178 pb_malloc_bufmgr_is_buffer_busy( struct pb_manager *mgr, 179 struct pb_buffer *buf ) 180 { 181 return FALSE; 182 } 183 184 185 static struct pb_manager 186 pb_malloc_bufmgr = { 187 pb_malloc_bufmgr_destroy, 188 pb_malloc_bufmgr_create_buffer, 189 pb_malloc_bufmgr_flush, 190 pb_malloc_bufmgr_is_buffer_busy 191 }; 192 193 194 struct pb_manager * 195 pb_malloc_bufmgr_create(void) 196 { 197 return &pb_malloc_bufmgr; 198 } 199
