создание и продвижение сайта (вбиваю в ТОП-10, как гвозди)Настройка и сопровождение платной рекламы яндекс.директ

PHP. Руководство по PHP. 2005

dio_fcntl

(PHP 4>= 4.2.0, PECL)dio_fcntl -- Performs a c library fcntl on fd

Описание

mixed dio_fcntl (resource fd, int cmd [, mixed args])

The dio_fcntl() function performs the operation specified by cmd on the file descriptor fd. Some commands require additional arguments args to be supplied.

Замечание: Для Windows-платформ

эта функция не реализована.

Список параметров

The file descriptor returned by dio_open().

cmd

Can be one of the following operations:

F_SETLK - Lock is set or cleared. If the lock is held by someone else dio_fcntl() returns -1.

- F_SETLKW - like F_SETLK, but in case the lock is held by someone else, dio_fcntl() waits until the lock is released.

- F_GETLK - dio_fcntl() returns an associative array (as described above) if someone else prevents lock. If there is no obstruction key "type" will set to F_UNLCK.

- F_DUPFD - finds the lowest numbered available file descriptor greater than or equal to args and returns them.

- F_SETFL - Sets the file descriptors flags to the value specified by args, which can be O_APPEND, O_NONBLOCK or O_ASYNC. To use O_ASYNC you will need to use the PCNTL extension.

args

args is an associative array, when cmd is F_SETLK or F_SETLLW, with the following keys:

"start" - offset where lock begins

- "length" - size of locked area. zero means to end of file

- "wenth" - Where l_start is relative to: can be SEEK_SET, SEEK_END and SEEK_CUR

- "type" - type of lock: can be F_RDLCK (read lock), F_WRLCK (write lock) or F_UNLCK (unlock)

Возвращаемые значения

Returns the result of the C call.

Примеры

Пример 1. Setting and clearing a lock


<?php
$fd = dio_open('/dev/ttyS0', O_RDWR);
if (dio_fcntl($fd, F_SETLK, Array("type"=>F_WRLCK)) == -1){
// the file descriptor appears locked
echo "The lock can not be cleared. It is held by someone else.";
} else {
echo "Lock succesfully set/cleared";
}
dio_close($fd);
?>

dio_close

dio_open

Отвечу на любые вопросы. С уважением, Дмитрий Владимирович.

⇪

Ваше письмо	×