em_pool_inline.h

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#ifndef EM_POOL_INLINE_H_
#define EM_POOL_INLINE_H_
 
/**
 * @file
 * EM internal event pool inlined functions
 */
 
#include <stdint.h>
 
#include <odp_api.h>
 
#include <event_machine.h>
 
#include "em_mem.h"
#include "em_pool_types.h"
#include "misc/objpool.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
/** Convert pool handle to pool index */
static inline int
pool_hdl2idx(em_pool_t pool)
{
        return (int)(uintptr_t)pool - 1;
}
 
/** Convert pool index to pool handle */
static inline em_pool_t
pool_idx2hdl(int pool_idx)
{
        return (em_pool_t)(uintptr_t)(pool_idx + 1);
}
 
/** Returns pool element associated with pool handle */
static inline mpool_elem_t *
pool_elem_get(em_pool_t pool)
{
        const int pool_idx = pool_hdl2idx(pool);
        mpool_elem_t *mpool_elem;
 
        if (unlikely((unsigned int)pool_idx > EM_CONFIG_POOLS - 1))
                return NULL;
 
        mpool_elem = &em_shm->mpool_tbl.pool[pool_idx];
 
        return mpool_elem;
}
 
static inline int
pool_allocated(const mpool_elem_t *const mpool_elem)
{
        return !objpool_in_pool(&mpool_elem->objpool_elem);
}
 
static inline int
pool_find_subpool(const mpool_elem_t *const pool_elem, uint32_t size)
{
        int subpool;
 
        /* Find the optimal subpool to allocate the event from */
        for (subpool = 0; subpool < pool_elem->num_subpools &&
             size > pool_elem->size[subpool]; subpool++)
                ;
 
        if (unlikely(subpool >= pool_elem->num_subpools))
                return -1;
 
        return subpool;
}
 
/**
 * Get the EM event-pool that an odp-pool belongs to.
 *
 * An EM event-pool consists of up to EM_MAX_SUBPOOLS subpools (that are
 * odp-pools) - a table (em_shm->mpool_tbl.pool_subpool_odp2em[]) contains the
 * mapping and is populated during em_pool_create() calls.
 */
static inline em_pool_t
pool_odp2em(odp_pool_t odp_pool)
{
        /*
         * 'idx' is in the range: 0 to odp_pool_max_index(), which is smaller
         * than the length of the em_shm->mpool_tbl.pool_subpool_odp2em[] array
         * (verified at startup in pool_init()).
         */
        int idx = odp_pool_index(odp_pool);
 
        if (unlikely(idx < 0))
                return EM_POOL_UNDEF;
 
        return (em_pool_t)(uintptr_t)em_shm->mpool_tbl.pool_subpool_odp2em[idx].pool;
}
 
/**
 * Get the EM event-pool and subpool that an odp-pool belongs to.
 *
 * An EM event-pool consists of up to EM_MAX_SUBPOOLS subpools (that are
 * odp-pools) - a table (em_shm->mpool_tbl.pool_subpool_odp2em[]) contains the
 * mapping and is populated during em_pool_create() calls.
 */
static inline pool_subpool_t
pool_subpool_odp2em(odp_pool_t odp_pool)
{
        /*
         * 'idx' is in the range: 0 to odp_pool_max_index(), which is smaller
         * than the length of the em_shm->mpool_tbl.pool_subpool_odp2em[] array
         * (verified at startup in pool_init()).
         */
        int idx = odp_pool_index(odp_pool);
 
        if (unlikely(idx < 0))
                return pool_subpool_undef; /* .pool=EM_POOL_UNDEF, .subpool=0 */
 
        return em_shm->mpool_tbl.pool_subpool_odp2em[idx];
}
 
#ifdef __cplusplus
}
#endif
 
#endif /* EM_POOL_INLINE_H_ */