From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gaetan Rivet Subject: [PATCH v9 19/27] ethdev: add private generic device iterator Date: Wed, 4 Jul 2018 00:15:02 +0200 Message-ID: <1e945f9d91a2ca8b2f6d2682f35a370083d09dad.1530655929.git.gaetan.rivet@6wind.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: Gaetan Rivet To: dev@dpdk.org Return-path: Received: from mail-wm0-f41.google.com (mail-wm0-f41.google.com [74.125.82.41]) by dpdk.org (Postfix) with ESMTP id 90AB81BE9F for ; Wed, 4 Jul 2018 00:16:00 +0200 (CEST) Received: by mail-wm0-f41.google.com with SMTP id l15-v6so11492794wmc.1 for ; Tue, 03 Jul 2018 15:16:00 -0700 (PDT) In-Reply-To: In-Reply-To: References: List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" This iterator can be customized with a comparison function that will trigger a stopping condition. It can be leveraged to write several different iterators that have similar but non-identical purposes. It is private to librte_ethdev. Signed-off-by: Gaetan Rivet --- lib/librte_ethdev/Makefile | 1 + lib/librte_ethdev/eth_private.c | 31 +++++++++++++++++++++++++++++++ lib/librte_ethdev/eth_private.h | 26 ++++++++++++++++++++++++++ 3 files changed, 58 insertions(+) create mode 100644 lib/librte_ethdev/eth_private.c create mode 100644 lib/librte_ethdev/eth_private.h diff --git a/lib/librte_ethdev/Makefile b/lib/librte_ethdev/Makefile index c2f2f7d82..2fa133fbc 100644 --- a/lib/librte_ethdev/Makefile +++ b/lib/librte_ethdev/Makefile @@ -18,6 +18,7 @@ EXPORT_MAP := rte_ethdev_version.map LIBABIVER := 9 +SRCS-y += eth_private.c SRCS-y += rte_ethdev.c SRCS-y += rte_flow.c SRCS-y += rte_tm.c diff --git a/lib/librte_ethdev/eth_private.c b/lib/librte_ethdev/eth_private.c new file mode 100644 index 000000000..d565568a0 --- /dev/null +++ b/lib/librte_ethdev/eth_private.c @@ -0,0 +1,31 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2018 Gaëtan Rivet + */ + +#include "rte_ethdev.h" +#include "eth_private.h" + +struct rte_eth_dev * +eth_find_device(const struct rte_eth_dev *start, rte_eth_cmp_t cmp, + const void *data) +{ + struct rte_eth_dev *edev; + ptrdiff_t idx; + + /* Avoid Undefined Behaviour */ + if (start != NULL && + (start < &rte_eth_devices[0] || + start > &rte_eth_devices[RTE_MAX_ETHPORTS])) + return NULL; + if (start != NULL) + idx = start - &rte_eth_devices[0] + 1; + else + idx = 0; + for (; idx < RTE_MAX_ETHPORTS; idx++) { + edev = &rte_eth_devices[idx]; + if (cmp(edev, data) == 0) + return edev; + } + return NULL; +} + diff --git a/lib/librte_ethdev/eth_private.h b/lib/librte_ethdev/eth_private.h new file mode 100644 index 000000000..0f5c6d5c4 --- /dev/null +++ b/lib/librte_ethdev/eth_private.h @@ -0,0 +1,26 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2018 Gaëtan Rivet + */ + +#ifndef _RTE_ETH_PRIVATE_H_ +#define _RTE_ETH_PRIVATE_H_ + +#include "rte_ethdev.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* Generic rte_eth_dev comparison function. */ +typedef int (*rte_eth_cmp_t)(const struct rte_eth_dev *, const void *); + +/* Generic rte_eth_dev iterator. */ +struct rte_eth_dev * +eth_find_device(const struct rte_eth_dev *_start, rte_eth_cmp_t cmp, + const void *data); + +#ifdef __cplusplus +} +#endif + +#endif /* _RTE_ETH_PRIVATE_H_ */ -- 2.11.0