DOKK / manpages / debian 13 / dpdk-doc / rte_class_find.3.en
rte_class.h(3) Library Functions Manual rte_class.h(3)

rte_class.h

#include <rte_dev.h>


struct rte_class


#define RTE_REGISTER_CLASS(nm, cls)


typedef int(* rte_class_cmp_t) (const struct rte_class *cls, const void *data)


RTE_TAILQ_HEAD (rte_class_list, rte_class)
struct rte_class * rte_class_find (const struct rte_class *start, rte_class_cmp_t cmp, const void *data)
struct rte_class * rte_class_find_by_name (const char *name)
void rte_class_register (struct rte_class *cls)
void rte_class_unregister (struct rte_class *cls)

DPDK device class interface.

This file describes the interface of the device class abstraction layer.

A device class defines the type of function a device will be used for e.g.: Ethernet adapter (eth), cryptographic co-processor (crypto), etc.

Definition in file rte_class.h.

Value:.PP

RTE_INIT_PRIO(classinitfn_ ##nm, CLASS) \
{\


    (cls).name = RTE_STR(nm); \


    rte_class_register(&cls); \
}

Helper for Class registration. The constructor has lower priority than Bus constructors. The constructor has higher priority than PMD constructors.

Definition at line 111 of file rte_class.h.

typedef int(* rte_class_cmp_t) (const struct rte_class *cls, const void *data)

Class comparison function.

Parameters

cls Class under test.
data Data to compare against.

Returns

0 if the class matches the data. !0 if the class does not match. <0 if ordering is possible and the class is lower than the data. >0 if ordering is possible and the class is greater than the data.

Definition at line 54 of file rte_class.h.

Double linked list of classes

struct rte_class * rte_class_find (const struct rte_class * start, rte_class_cmp_t cmp, const void * data)

Class iterator to find a particular class.

This function compares each registered class to find one that matches the data passed as parameter.

If the comparison function returns zero this function will stop iterating over any more classes. To continue a search the class of a previous search can be passed via the start parameter.

Parameters

start Starting point for the iteration.
cmp Comparison function.
data Data to pass to comparison function.

Returns

A pointer to a rte_class structure or NULL in case no class matches

struct rte_class * rte_class_find_by_name (const char * name)

Find the registered class for a given name.

Register a Class handle.

Parameters

cls A pointer to a rte_class structure describing the class to be registered.

Unregister a Class handle.

Parameters

cls A pointer to a rte_class structure describing the class to be unregistered.

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