rte_lcore.h

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/*-
 *   BSD LICENSE
 *
 *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
 *   All rights reserved.
 *
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 *   modification, are permitted provided that the following conditions
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 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
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 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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 */

#ifndef _RTE_LCORE_H_
#define _RTE_LCORE_H_

#include <rte_per_lcore.h>
#include <rte_eal.h>
#include <rte_launch.h>

#ifdef __cplusplus
extern "C" {
#endif

#define LCORE_ID_ANY     UINT32_MAX       
#if defined(__linux__)
        typedef cpu_set_t rte_cpuset_t;
#elif defined(__FreeBSD__)
#include <pthread_np.h>
        typedef cpuset_t rte_cpuset_t;
#endif

struct lcore_config {
        unsigned detected;         
        pthread_t thread_id;       
        int pipe_master2slave[2];  
        int pipe_slave2master[2];  
        lcore_function_t * volatile f;         
        void * volatile arg;       
        volatile int ret;          
        volatile enum rte_lcore_state_t state; 
        unsigned socket_id;        
        unsigned core_id;          
        int core_index;            
        rte_cpuset_t cpuset;       
};

extern struct lcore_config lcore_config[RTE_MAX_LCORE];

RTE_DECLARE_PER_LCORE(unsigned, _lcore_id);  
RTE_DECLARE_PER_LCORE(rte_cpuset_t, _cpuset); 
static inline unsigned
rte_lcore_id(void)
{
        return RTE_PER_LCORE(_lcore_id);
}

static inline unsigned
rte_get_master_lcore(void)
{
        return rte_eal_get_configuration()->master_lcore;
}

static inline unsigned
rte_lcore_count(void)
{
        const struct rte_config *cfg = rte_eal_get_configuration();
        return cfg->lcore_count;
}

static inline int
rte_lcore_index(int lcore_id)
{
        if (lcore_id >= RTE_MAX_LCORE)
                return -1;
        if (lcore_id < 0)
                lcore_id = rte_lcore_id();
        return lcore_config[lcore_id].core_index;
}

unsigned rte_socket_id(void);

static inline unsigned
rte_lcore_to_socket_id(unsigned lcore_id)
{
        return lcore_config[lcore_id].socket_id;
}

static inline int
rte_lcore_is_enabled(unsigned lcore_id)
{
        struct rte_config *cfg = rte_eal_get_configuration();
        if (lcore_id >= RTE_MAX_LCORE)
                return 0;
        return cfg->lcore_role[lcore_id] != ROLE_OFF;
}

static inline unsigned
rte_get_next_lcore(unsigned i, int skip_master, int wrap)
{
        i++;
        if (wrap)
                i %= RTE_MAX_LCORE;

        while (i < RTE_MAX_LCORE) {
                if (!rte_lcore_is_enabled(i) ||
                    (skip_master && (i == rte_get_master_lcore()))) {
                        i++;
                        if (wrap)
                                i %= RTE_MAX_LCORE;
                        continue;
                }
                break;
        }
        return i;
}
#define RTE_LCORE_FOREACH(i)                                            \
        for (i = rte_get_next_lcore(-1, 0, 0);                          \
             i<RTE_MAX_LCORE;                                           \
             i = rte_get_next_lcore(i, 0, 0))

#define RTE_LCORE_FOREACH_SLAVE(i)                                      \
        for (i = rte_get_next_lcore(-1, 1, 0);                          \
             i<RTE_MAX_LCORE;                                           \
             i = rte_get_next_lcore(i, 1, 0))

int rte_thread_set_affinity(rte_cpuset_t *cpusetp);

void rte_thread_get_affinity(rte_cpuset_t *cpusetp);

#if defined(__DOXYGEN__)
#define rte_thread_setname(...) pthread_setname_np(__VA_ARGS__)
#endif

#if defined(__GLIBC__) && defined(__GLIBC_PREREQ)
#if __GLIBC_PREREQ(2, 12)
#define rte_thread_setname(...) pthread_setname_np(__VA_ARGS__)
#else
#define rte_thread_setname(...) 0
#endif
#endif

#ifdef __cplusplus
}
#endif


#endif /* _RTE_LCORE_H_ */