Line data    Source code

       1             : /*
       2             :  * Copyright (c) 2017 Cisco and/or its affiliates.
       3             :  * Licensed under the Apache License, Version 2.0 (the "License");
       4             :  * you may not use this file except in compliance with the License.
       5             :  * You may obtain a copy of the License at:
       6             :  *
       7             :  *     http://www.apache.org/licenses/LICENSE-2.0
       8             :  *
       9             :  * Unless required by applicable law or agreed to in writing, software
      10             :  * distributed under the License is distributed on an "AS IS" BASIS,
      11             :  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      12             :  * See the License for the specific language governing permissions and
      13             :  * limitations under the License.
      14             :  */
      15             : /*
      16             :   Copyright (c) 2001, 2002, 2003, 2004 Eliot Dresselhaus
      17             : 
      18             :   Permission is hereby granted, free of charge, to any person obtaining
      19             :   a copy of this software and associated documentation files (the
      20             :   "Software"), to deal in the Software without restriction, including
      21             :   without limitation the rights to use, copy, modify, merge, publish,
      22             :   distribute, sublicense, and/or sell copies of the Software, and to
      23             :   permit persons to whom the Software is furnished to do so, subject to
      24             :   the following conditions:
      25             : 
      26             :   The above copyright notice and this permission notice shall be
      27             :   included in all copies or substantial portions of the Software.
      28             : 
      29             :   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
      30             :   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
      31             :   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
      32             :   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
      33             :   LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
      34             :   OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
      35             :   WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
      36             : */
      37             : 
      38             : #include <vppinfra/pool.h>
      39             : 
      40             : __clib_export void
      41        1247 : _pool_init_fixed (void **pool_ptr, uword elt_size, uword max_elts, uword align)
      42             : {
      43             :   uword *b;
      44             :   pool_header_t *ph;
      45             :   u8 *v;
      46             :   u32 i;
      47        1247 :   vec_attr_t va = { .elt_sz = elt_size,
      48             :                     .align = align,
      49             :                     .hdr_sz = sizeof (pool_header_t) };
      50             : 
      51        1247 :   ASSERT (elt_size);
      52        1247 :   ASSERT (max_elts);
      53             : 
      54        1247 :   v = _vec_alloc_internal (max_elts, &va);
      55             : 
      56        1247 :   ph = pool_header (v);
      57        1247 :   ph->max_elts = max_elts;
      58             : 
      59             :   /* Build the free-index vector */
      60        1247 :   vec_validate_aligned (ph->free_indices, max_elts - 1, CLIB_CACHE_LINE_BYTES);
      61     8763450 :   for (i = 0; i < max_elts; i++)
      62     8762200 :     ph->free_indices[i] = (max_elts - 1) - i;
      63             : 
      64             :   /* Set the entire free bitmap */
      65        1247 :   clib_bitmap_alloc (ph->free_bitmap, max_elts);
      66             : 
      67      138135 :   for (b = ph->free_bitmap, i = max_elts; i >= uword_bits;
      68      136888 :        i -= uword_bits, b++)
      69      136888 :     b[0] = ~0ULL;
      70             : 
      71        1247 :   if (i)
      72          39 :     b[0] = pow2_mask (i);
      73             : 
      74        1247 :   *pool_ptr = v;
      75        1247 : }
      76             :