Home | History | Annotate | Download | only in pipebuffer 
      1 /**************************************************************************
      2  *
      3  * Copyright 2007 VMware, Inc.
      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 /**
     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 <jfonseca (at) vmware.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