X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=lib%2Flibrte_eal%2Fcommon%2Finclude%2Frte_option.h;fp=lib%2Flibrte_eal%2Fcommon%2Finclude%2Frte_option.h;h=8957b970cde5b1d1f41311be21f40fb1603bc7c9;hb=8d01b9cd70a67cdafd5b965a70420c3bd7fb3f82;hp=0000000000000000000000000000000000000000;hpb=b63264c8342e6a1b6971c79550d2af2024b6a4de;p=deb_dpdk.git diff --git a/lib/librte_eal/common/include/rte_option.h b/lib/librte_eal/common/include/rte_option.h new file mode 100644 index 00000000..8957b970 --- /dev/null +++ b/lib/librte_eal/common/include/rte_option.h @@ -0,0 +1,63 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2018 Intel Corporation. + */ + +#ifndef __INCLUDE_RTE_OPTION_H__ +#define __INCLUDE_RTE_OPTION_H__ + +/** + * @file + * + * This API offers the ability to register options to the EAL command line and + * map those options to functions that will be executed at the end of EAL + * initialization. These options will be available as part of the EAL command + * line of applications and are dynamically managed. + * + * This is used primarily by DPDK libraries offering command line options. + * Currently, this API is limited to registering options without argument. + * + * The register API can be used to resolve circular dependency issues + * between EAL and the library. The library uses EAL, but is also initialized + * by EAL. Hence, EAL depends on the init function of the library. The API + * introduced in rte_option allows us to register the library init with EAL + * (passing a function pointer) and avoid the circular dependency. + */ + +#ifdef __cplusplus +extern "C" { +#endif + +typedef int (*rte_option_cb)(void); + +/* + * Structure describing the EAL command line option being registered. + */ +struct rte_option { + TAILQ_ENTRY(rte_option) next; /**< Next entry in the list. */ + char *opt_str; /**< The option name. */ + rte_option_cb cb; /**< Function called when option is used. */ + int enabled; /**< Set when the option is used. */ +}; + +/** + * @warning + * @b EXPERIMENTAL: this API may change without prior notice + * + * Register an option to the EAL command line. + * When recognized, the associated function will be executed at the end of EAL + * initialization. + * + * The associated structure must be available the whole time this option is + * registered (i.e. not stack memory). + * + * @param opt + * Structure describing the option to parse. + */ +void __rte_experimental +rte_option_register(struct rte_option *opt); + +#ifdef __cplusplus +} +#endif + +#endif