iofunc_devctl_default()

Обработчик по умолчанию для сообщений _IO_DEVCTL

Прототип:

#include <sys/iofunc.h>
                                       
int iofunc_devctl_default( resmgr_context_t *ctp,
                           io_devctl_t *msg,
                           iofunc_ocb_t *ocb );

Аргументы:

ctp

A pointer to a resmgr_context_t structure that the resource-manager library uses to pass context information between functions.

msg

A pointer to the io_devctl_t structure that contains the message that the resource manager received.

ocb

A pointer to the iofunc_ocb_t structure for the Open Control Block that was created when the client opened the resource.

Библиотека:

libc

Описание:

The iofunc_devctl_default() function implements the default actions for _IO_DEVCTL messages.

You can place this function directly into the io_funcs table passed to resmgr_attach(), at the devctl position, or you can call iofunc_func_init() to initialize all of the functions to their default values.

The iofunc_devctl_default() function calls iofunc_devctl() to do the actual work.

Возвращаемое значение:

EOK

Успешное завершение.

EINVAL

An attempt to set the flags for a resource that is synchronized, with no mount structure defined, or no synchronized I/O defined.

ENOTTY

An unsupported device control message was decoded.

_RESMGR_DEFAULT

An supported device control message that isn't a known DCMD_ALL_* command was decoded.

Классификация:

ЗОСРВ «Нейтрино»

Точка остановки потока

Нет

Обработчик прерываний

Нет

Обработчик сигналов

Да

В потоке

Да

Тематические ссылки:

io_devctl_t, iofunc_devctl(), iofunc_func_init(), iofunc_ocb_t, iofunc_time_update(), resmgr_attach(), resmgr_context_t, resmgr_io_funcs_t

Предыдущий раздел: Описание API системной библиотеки