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/* Copyright (c) 2013, Linaro Limited
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <odp_posix_extensions.h>
#include <sched.h>
#include <pthread.h>
#include <odp/cpumask.h>
#include <odp_debug_internal.h>
#include <stdlib.h>
#include <string.h>
/** @internal Compile time assert */
_ODP_STATIC_ASSERT(CPU_SETSIZE >= ODP_CPUMASK_SIZE,
"ODP_CPUMASK_SIZE__SIZE_ERROR");
void odp_cpumask_from_str(odp_cpumask_t *mask, const char *str_in)
{
cpu_set_t cpuset;
const char *str = str_in;
const char *p;
int cpu = 0;
int len = strlen(str);
CPU_ZERO(&cpuset);
odp_cpumask_zero(mask);
/* Strip leading "0x"/"0X" if present and verify length */
if ((len >= 2) && ((str[1] == 'x') || (str[1] == 'X'))) {
str += 2;
len -= 2;
}
if (!len)
return;
/* Walk string from LSB setting cpu bits */
for (p = str + len - 1; (len > 0) && (cpu < CPU_SETSIZE); p--, len--) {
char c = *p;
int value;
int idx;
/* Convert hex nibble, abort when invalid value found */
if ((c >= '0') && (c <= '9'))
value = c - '0';
else if ((c >= 'A') && (c <= 'F'))
value = c - 'A' + 10;
else if ((c >= 'a') && (c <= 'f'))
value = c - 'a' + 10;
else
return;
/* Walk converted nibble and set bits in mask */
for (idx = 0; idx < 4; idx++, cpu++)
if (value & (1 << idx))
CPU_SET(cpu, &cpuset);
}
/* Copy the computed mask */
memcpy(&mask->set, &cpuset, sizeof(cpuset));
}
int32_t odp_cpumask_to_str(const odp_cpumask_t *mask, char *str, int32_t len)
{
char *p = str;
int cpu = odp_cpumask_last(mask);
int nibbles;
int value;
/* Handle bad string length, need at least 4 chars for "0x0" and
* terminating null char */
if (len < 4)
return -1; /* Failure */
/* Handle no CPU found */
if (cpu < 0) {
strcpy(str, "0x0");
return strlen(str) + 1; /* Success */
}
/* CPU was found and cpu >= 0 */
/* Compute number of nibbles in cpumask that have bits set */
nibbles = (cpu / 4) + 1;
/* Verify minimum space (account for "0x" and termination) */
if (len < (3 + nibbles))
return -1; /* Failure */
/* Prefix */
*p++ = '0';
*p++ = 'x';
/*
* Now we can scan the cpus down to zero and
* build the string one nibble at a time
*/
value = 0;
do {
/* Set bit to go into the current nibble */
if (CPU_ISSET(cpu, &mask->set))
value |= 1 << (cpu % 4);
/* If we are on a nibble boundary flush value to string */
if (0 == (cpu % 4)) {
if (value < 0xA)
*p++ = '0' + value;
else
*p++ = 'A' + value - 0xA;
value = 0;
}
} while (cpu--);
/* Terminate the string */
*p++ = 0;
return p - str; /* Success */
}
void odp_cpumask_zero(odp_cpumask_t *mask)
{
CPU_ZERO(&mask->set);
}
void odp_cpumask_set(odp_cpumask_t *mask, int cpu)
{
CPU_SET(cpu, &mask->set);
}
void odp_cpumask_setall(odp_cpumask_t *mask)
{
int cpu;
for (cpu = 0; cpu < CPU_SETSIZE; cpu++)
CPU_SET(cpu, &mask->set);
}
void odp_cpumask_clr(odp_cpumask_t *mask, int cpu)
{
CPU_CLR(cpu, &mask->set);
}
int odp_cpumask_isset(const odp_cpumask_t *mask, int cpu)
{
return CPU_ISSET(cpu, &mask->set);
}
int odp_cpumask_count(const odp_cpumask_t *mask)
{
return CPU_COUNT(&mask->set);
}
void odp_cpumask_and(odp_cpumask_t *dest, const odp_cpumask_t *src1,
const odp_cpumask_t *src2)
{
CPU_AND(&dest->set, &src1->set, &src2->set);
}
void odp_cpumask_or(odp_cpumask_t *dest, const odp_cpumask_t *src1,
const odp_cpumask_t *src2)
{
CPU_OR(&dest->set, &src1->set, &src2->set);
}
void odp_cpumask_xor(odp_cpumask_t *dest, const odp_cpumask_t *src1,
const odp_cpumask_t *src2)
{
CPU_XOR(&dest->set, &src1->set, &src2->set);
}
int odp_cpumask_equal(const odp_cpumask_t *mask1,
const odp_cpumask_t *mask2)
{
return CPU_EQUAL(&mask1->set, &mask2->set);
}
void odp_cpumask_copy(odp_cpumask_t *dest, const odp_cpumask_t *src)
{
memcpy(&dest->set, &src->set, sizeof(src->set));
}
int odp_cpumask_first(const odp_cpumask_t *mask)
{
int cpu;
for (cpu = 0; cpu < CPU_SETSIZE; cpu++)
if (odp_cpumask_isset(mask, cpu))
return cpu;
return -1;
}
int odp_cpumask_last(const odp_cpumask_t *mask)
{
int cpu;
for (cpu = CPU_SETSIZE - 1; cpu >= 0; cpu--)
if (odp_cpumask_isset(mask, cpu))
return cpu;
return -1;
}
int odp_cpumask_next(const odp_cpumask_t *mask, int cpu)
{
for (cpu += 1; cpu < CPU_SETSIZE; cpu++)
if (odp_cpumask_isset(mask, cpu))
return cpu;
return -1;
}
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