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Vector Packet Processing
refcount.c
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1 /*
2  * Copyright (c) 2016 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 #include <vnet/util/refcount.h>
17 
18 void __vlib_refcount_resize(vlib_refcount_per_cpu_t *per_cpu, u32 size)
19 {
20  u32 *new_counter = 0, *old_counter;
21  vec_validate(new_counter, size);
23  memcpy(new_counter, per_cpu->counters, vec_len(per_cpu->counters)*4);
24  old_counter = per_cpu->counters;
25  per_cpu->counters = new_counter;
28  vec_free(old_counter);
29 }
30 
32 {
33  u64 count = 0;
35  u32 thread_index;
36  for (thread_index = 0; thread_index < tm->n_vlib_mains; thread_index++) {
37  vlib_refcount_lock(r->per_cpu[thread_index].counter_lock);
38  if (index < vec_len(r->per_cpu[thread_index].counters))
39  {
40  count += r->per_cpu[thread_index].counters[index];
41  }
42  vlib_refcount_unlock(r->per_cpu[thread_index].counter_lock);
43  }
44  return count;
45 }
46 
#define vec_validate(V, I)
Make sure vector is long enough for given index (no header, unspecified alignment) ...
Definition: vec.h:432
volatile u32 * counter_lock
Definition: refcount.h:44
unsigned long u64
Definition: types.h:89
static_always_inline void vlib_refcount_unlock(volatile u32 *counter_lock)
Definition: refcount.h:60
u64 vlib_refcount_get(vlib_refcount_t *r, u32 index)
Definition: refcount.c:31
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:336
unsigned int u32
Definition: types.h:88
size_t count
Definition: vapi.c:42
static_always_inline void vlib_refcount_lock(volatile u32 *counter_lock)
Definition: refcount.h:53
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
static vlib_thread_main_t * vlib_get_thread_main()
Definition: global_funcs.h:32
#define CLIB_MEMORY_BARRIER()
Definition: clib.h:109
vlib_refcount_per_cpu_t * per_cpu
Definition: refcount.h:49