void *OPENSSL_LH_delete(OPENSSL_LHASH *lh, const void *data)
{
    unsigned long hash;
    OPENSSL_LH_NODE *nn, **rn;
    void *ret;
    lh->error = 0;
    rn = getrn(lh, data, &hash);
    if (*rn == NULL) {
        lh->num_no_delete++;
        return NULL;
    } else {
        nn = *rn;
        *rn = nn->next;
        ret = nn->data;
        OPENSSL_free(nn);
        lh->num_delete++;
    }
    lh->num_items--;
    if ((lh->num_nodes > MIN_NODES) &&
        (lh->down_load >= (lh->num_items * LH_LOAD_MULT / lh->num_nodes)))
        contract(lh);
    return ret;
}
['int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c)\n{\n    int ret = 0;\n    SSL_SESSION *s;\n    SSL_SESSION_up_ref(c);\n    CRYPTO_THREAD_write_lock(ctx->lock);\n    s = lh_SSL_SESSION_insert(ctx->sessions, c);\n    if (s != NULL && s != c) {\n        SSL_SESSION_list_remove(ctx, s);\n        SSL_SESSION_free(s);\n        s = NULL;\n    } else if (s == NULL &&\n               lh_SSL_SESSION_retrieve(ctx->sessions, c) == NULL) {\n        s = c;\n    }\n    if (s == NULL)\n        SSL_SESSION_list_add(ctx, c);\n    if (s != NULL) {\n        SSL_SESSION_free(s);\n        ret = 0;\n    } else {\n        ret = 1;\n        if (SSL_CTX_sess_get_cache_size(ctx) > 0) {\n            while (SSL_CTX_sess_number(ctx) > SSL_CTX_sess_get_cache_size(ctx)) {\n                if (!remove_session_lock(ctx, ctx->session_cache_tail, 0))\n                    break;\n                else\n                    tsan_counter(&ctx->stats.sess_cache_full);\n            }\n        }\n    }\n    CRYPTO_THREAD_unlock(ctx->lock);\n    return ret;\n}', 'DEFINE_LHASH_OF(SSL_SESSION)', 'void *OPENSSL_LH_insert(OPENSSL_LHASH *lh, void *data)\n{\n    unsigned long hash;\n    OPENSSL_LH_NODE *nn, **rn;\n    void *ret;\n    lh->error = 0;\n    if ((lh->up_load <= (lh->num_items * LH_LOAD_MULT / lh->num_nodes)) && !expand(lh))\n        return NULL;\n    rn = getrn(lh, data, &hash);\n    if (*rn == NULL) {\n        if ((nn = OPENSSL_malloc(sizeof(*nn))) == NULL) {\n            lh->error++;\n            return NULL;\n        }\n        nn->data = data;\n        nn->next = NULL;\n        nn->hash = hash;\n        *rn = nn;\n        ret = NULL;\n        lh->num_insert++;\n        lh->num_items++;\n    } else {\n        ret = (*rn)->data;\n        (*rn)->data = data;\n        lh->num_replace++;\n    }\n    return ret;\n}', 'static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck)\n{\n    SSL_SESSION *r;\n    int ret = 0;\n    if ((c != NULL) && (c->session_id_length != 0)) {\n        if (lck)\n            CRYPTO_THREAD_write_lock(ctx->lock);\n        if ((r = lh_SSL_SESSION_retrieve(ctx->sessions, c)) != NULL) {\n            ret = 1;\n            r = lh_SSL_SESSION_delete(ctx->sessions, r);\n            SSL_SESSION_list_remove(ctx, r);\n        }\n        c->not_resumable = 1;\n        if (lck)\n            CRYPTO_THREAD_unlock(ctx->lock);\n        if (ctx->remove_session_cb != NULL)\n            ctx->remove_session_cb(ctx, c);\n        if (ret)\n            SSL_SESSION_free(r);\n    } else\n        ret = 0;\n    return ret;\n}', 'void *OPENSSL_LH_delete(OPENSSL_LHASH *lh, const void *data)\n{\n    unsigned long hash;\n    OPENSSL_LH_NODE *nn, **rn;\n    void *ret;\n    lh->error = 0;\n    rn = getrn(lh, data, &hash);\n    if (*rn == NULL) {\n        lh->num_no_delete++;\n        return NULL;\n    } else {\n        nn = *rn;\n        *rn = nn->next;\n        ret = nn->data;\n        OPENSSL_free(nn);\n        lh->num_delete++;\n    }\n    lh->num_items--;\n    if ((lh->num_nodes > MIN_NODES) &&\n        (lh->down_load >= (lh->num_items * LH_LOAD_MULT / lh->num_nodes)))\n        contract(lh);\n    return ret;\n}']