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/*
// Copyright (c) 2010-2017 Intel Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
*/
#include <string.h>
#include <stdio.h>
#include "prox_cfg.h"
#define CM_N_BITS (sizeof(prox_cfg.core_mask[0]) * 8)
#define CM_ALL_N_BITS (sizeof(prox_cfg.core_mask) * 8)
struct prox_cfg prox_cfg = {
.update_interval_str = "1"
};
static int prox_cm_isset(const uint32_t lcore_id)
{
uint64_t cm;
uint32_t cm_idx;
if (lcore_id > CM_ALL_N_BITS)
return -1;
cm = __UINT64_C(1) << (lcore_id % CM_N_BITS);
cm_idx = PROX_CM_DIM - 1 - lcore_id / CM_N_BITS;
return !!(prox_cfg.core_mask[cm_idx] & cm);
}
int prox_core_active(const uint32_t lcore_id, const int with_master)
{
int ret;
ret = prox_cm_isset(lcore_id);
if (ret < 0)
return 0;
if (with_master)
return ret || lcore_id == prox_cfg.master;
else
return ret && lcore_id != prox_cfg.master;
}
int prox_core_next(uint32_t* lcore_id, const int with_master)
{
for (uint32_t i = *lcore_id + 1; i < CM_ALL_N_BITS; ++i) {
if (prox_core_active(i, with_master)) {
*lcore_id = i;
return 0;
}
}
return -1;
}
int prox_core_to_hex(char *dst, const size_t size, const int with_master)
{
uint64_t cm;
uint32_t cm_len;
uint32_t cm_first = 0;
uint32_t master = prox_cfg.master;
/* Minimum size of the string has to big enough to hold the
bitmask in hex (including the prefix "0x"). */
if (size < PROX_CM_STR_LEN)
return 0;
snprintf(dst, size, "0x");
for (uint32_t i = 0; i < PROX_CM_DIM; ++i, cm_first = i) {
if ((with_master && ((CM_ALL_N_BITS - 1 - master) / CM_N_BITS == i * CM_N_BITS)) ||
prox_cfg.core_mask[i]) {
break;
}
}
for (uint32_t i = cm_first; i < PROX_CM_DIM; ++i) {
cm = prox_cfg.core_mask[i];
if (with_master && ((CM_ALL_N_BITS - 1 - master) / CM_N_BITS == i)) {
cm |= (__UINT64_C(1) << (master % CM_N_BITS));
}
snprintf(dst + strlen(dst), size - strlen(dst), i == cm_first? "%lx" : "%016lx", cm);
}
return 0;
}
int prox_core_to_str(char *dst, const size_t size, const int with_master)
{
uint32_t lcore_id = -1;
uint32_t first = 1;
*dst = 0;
lcore_id - 1;
while (prox_core_next(&lcore_id, with_master) == 0) {
/* Stop printing to string if there is not engough
space left. Assume that adding 1 core to the string
will take at most 5 + 1 bytes implying that
lcore_id < 999. Check if ther is space for another
6 bytes to add an elipsis */
if (12 + strlen(dst) > size) {
if (6 + strlen(dst) > size) {
snprintf(dst + strlen(dst), size - strlen(dst), ", ...");
return 0;
}
return -1;
}
snprintf(dst + strlen(dst), size - strlen(dst), first? "%u" : ", %u", lcore_id);
first = 0;
}
return 0;
}
void prox_core_clr(void)
{
memset(prox_cfg.core_mask, 0, sizeof(prox_cfg.core_mask));
}
int prox_core_set_active(const uint32_t lcore_id)
{
uint32_t cm_idx;
uint64_t cm;
if (lcore_id > CM_ALL_N_BITS)
return -1;
cm = __UINT64_C(1) << (lcore_id % CM_N_BITS);
cm_idx = PROX_CM_DIM - 1 - lcore_id / CM_N_BITS;
prox_cfg.core_mask[cm_idx] |= cm;
return 0;
}
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