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[62.23.145.78]) by smtp.gmail.com with ESMTPSA id i190-v6sm3771084wmd.33.2018.07.03.15.15.58 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 03 Jul 2018 15:15:58 -0700 (PDT) From: Gaetan Rivet To: dev@dpdk.org Cc: Gaetan Rivet Date: Wed, 4 Jul 2018 00:15:02 +0200 Message-Id: <1e945f9d91a2ca8b2f6d2682f35a370083d09dad.1530655929.git.gaetan.rivet@6wind.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: References: MIME-Version: 1.0 In-Reply-To: References: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: [dpdk-dev] [PATCH v9 19/27] ethdev: add private generic device iterator X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 03 Jul 2018 22:16:00 -0000 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