iofunc_mmap_default()

Обработчик по умолчанию для сообщений _IO_MMAP

Прототип:

#include <sys/iofunc.h>
int iofunc_mmap_default( resmgr_context_t *hdr,
io_mmap_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_mmap_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_mmap_default() function provides functionality for the _IO_MMAP message. This message is private to the Memory Manager (a part of the Neutrino microkernel's procnto-*).

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

Note that if the Process Manager is to be able to execute from this resource, then you must use the iofunc_mmap() function.

The iofunc_mmap_default() function calls iofunc_mmap() to do the actual work.

Возвращаемое значение:

A nonpositive value (i.e. ≤ 0)
Успешное завершение.
EROFS
An attempt to memory map (mmap) a read-only file, using the PROT_WRITE page protection mode.
EACCES
The client doesn't have the appropriate permissions.
ENOMEM
Insufficient memory exists to allocate internal resources required to effect the mapping.

Классификация:

ЗОСРВ «Нейтрино»

Точка остановки потока
Нет
Обработчик прерываний
Нет
Обработчик сигналов
Да
В потоке
Да

Тематические ссылки:

io_mmap_t, iofunc_func_init(), iofunc_mmap(), iofunc_ocb_t, resmgr_attach(), resmgr_context_t, resmgr_io_funcs_t




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