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/* Copyright (c) 2013, Linaro Limited
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <sched.h>
#include <odp/thread.h>
#include <odp/thrmask.h>
#include <odp_internal.h>
#include <odp/spinlock.h>
#include <odp/config.h>
#include <odp_debug_internal.h>
#include <odp/shared_memory.h>
#include <odp/align.h>
#include <odp/cpu.h>
#include <rte_lcore.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#define MASK_SIZE_16 ((ODP_THREAD_COUNT_MAX+15)/16)
typedef struct {
int thr;
int cpu;
odp_thread_type_t type;
} thread_state_t;
typedef struct {
thread_state_t thr[ODP_THREAD_COUNT_MAX];
union {
/* struct order must be kept in sync with schedule_types.h */
struct {
odp_thrmask_t all;
odp_thrmask_t worker;
odp_thrmask_t control;
};
odp_thrmask_t sched_grp_mask[ODP_CONFIG_SCHED_GRPS];
};
uint32_t num;
uint32_t num_worker;
uint32_t num_control;
odp_spinlock_t lock;
} thread_globals_t;
/* Globals */
static thread_globals_t *thread_globals;
/* Thread local */
static __thread thread_state_t *this_thread;
int odp_thread_init_global(void)
{
odp_shm_t shm;
int i;
shm = odp_shm_reserve("odp_thread_globals",
sizeof(thread_globals_t),
ODP_CACHE_LINE_SIZE, 0);
thread_globals = odp_shm_addr(shm);
if (thread_globals == NULL)
return -1;
memset(thread_globals, 0, sizeof(thread_globals_t));
odp_spinlock_init(&thread_globals->lock);
for (i = 0; i < ODP_CONFIG_SCHED_GRPS; i++)
odp_thrmask_zero(&thread_globals->sched_grp_mask[i]);
return 0;
}
odp_thrmask_t *thread_sched_grp_mask(int index);
odp_thrmask_t *thread_sched_grp_mask(int index)
{
return &thread_globals->sched_grp_mask[index];
}
int odp_thread_term_global(void)
{
int ret;
ret = odp_shm_free(odp_shm_lookup("odp_thread_globals"));
if (ret < 0)
ODP_ERR("shm free failed for odp_thread_globals");
return ret;
}
static int alloc_id(odp_thread_type_t type)
{
int thr;
odp_thrmask_t *all = &thread_globals->all;
if (thread_globals->num >= ODP_THREAD_COUNT_MAX)
return -1;
for (thr = 0; thr < ODP_THREAD_COUNT_MAX; thr++) {
if (odp_thrmask_isset(all, thr) == 0) {
odp_thrmask_set(all, thr);
if (type == ODP_THREAD_WORKER) {
odp_thrmask_set(&thread_globals->worker, thr);
thread_globals->num_worker++;
} else {
odp_thrmask_set(&thread_globals->control, thr);
thread_globals->num_control++;
}
thread_globals->num++;
return thr;
}
}
return -2;
}
static int free_id(int thr)
{
odp_thrmask_t *all = &thread_globals->all;
if (thr < 0 || thr >= ODP_THREAD_COUNT_MAX)
return -1;
if (odp_thrmask_isset(all, thr) == 0)
return -1;
odp_thrmask_clr(all, thr);
if (thread_globals->thr[thr].type == ODP_THREAD_WORKER) {
odp_thrmask_clr(&thread_globals->worker, thr);
thread_globals->num_worker--;
} else {
odp_thrmask_clr(&thread_globals->control, thr);
thread_globals->num_control--;
}
thread_globals->num--;
return thread_globals->num;
}
int odp_thread_init_local(odp_thread_type_t type)
{
int id;
int cpu;
struct rte_config *cfg = rte_eal_get_configuration();
odp_spinlock_lock(&thread_globals->lock);
id = alloc_id(type);
odp_spinlock_unlock(&thread_globals->lock);
if (id < 0) {
ODP_ERR("Too many threads\n");
return -1;
}
cpu = sched_getcpu();
if (cpu < 0) {
ODP_ERR("getcpu failed\n");
return -1;
}
thread_globals->thr[id].thr = id;
thread_globals->thr[id].cpu = cpu;
thread_globals->thr[id].type = type;
RTE_PER_LCORE(_lcore_id) = cpu;
if (cfg->lcore_role[cpu] == ROLE_RTE)
ODP_ERR("There is a thread already running on core %d\n", cpu);
cfg->lcore_role[cpu] = ROLE_RTE;
this_thread = &thread_globals->thr[id];
return 0;
}
int odp_thread_term_local(void)
{
int num;
int id = this_thread->thr;
odp_spinlock_lock(&thread_globals->lock);
num = free_id(id);
odp_spinlock_unlock(&thread_globals->lock);
if (num < 0) {
ODP_ERR("failed to free thread id %i", id);
return -1;
}
return num; /* return a number of threads left */
}
int odp_thread_id(void)
{
return this_thread->thr;
}
int odp_thread_count(void)
{
return thread_globals->num;
}
int odp_thread_count_max(void)
{
return ODP_THREAD_COUNT_MAX;
}
odp_thread_type_t odp_thread_type(void)
{
return this_thread->type;
}
int odp_cpu_id(void)
{
return this_thread->cpu;
}
int odp_thrmask_worker(odp_thrmask_t *mask)
{
odp_thrmask_copy(mask, &thread_globals->worker);
return thread_globals->num_worker;
}
int odp_thrmask_control(odp_thrmask_t *mask)
{
odp_thrmask_copy(mask, &thread_globals->control);
return thread_globals->num_control;
}
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