eio_fallocate
(PECL eio >= 0.0.1dev)
eio_fallocate — Allows the caller to directly manipulate the allocated disk space for a file
Description
resource eio_fallocate ( mixed $fd , int $mode , int $offset , int $length [, int $pri = EIO_PRI_DEFAULT [, callable $callback = NULL [, mixed $data = NULL ]]] ) eio_fallocate() allows the caller to directly manipulate the allocated disk space for the file specified by fd file descriptor for the byte range starting at offset and continuing for length bytes.
Note: File should be opened for writing
EIO_O_CREATshould be logically OR'd withEIO_O_WRONLY, orEIO_O_RDWR
Parameters
fd
Stream, Socket resource, or numeric file descriptor, e.g. returned by eio_open().
mode
Currently only one flag is supported for mode: EIO_FALLOC_FL_KEEP_SIZE (the same as POSIX constant FALLOC_FL_KEEP_SIZE).
offset
Specifies start of the byte range.
length
Specifies length the byte range.
pri
The request priority: EIO_PRI_DEFAULT, EIO_PRI_MIN, EIO_PRI_MAX, or NULL. If NULL passed, pri internally is set to EIO_PRI_DEFAULT.
callback
callback function is called when the request is done. It should match the following prototype:
void?callback(mixed?$data,?int?$result[,?resource?$req]); data
is custom data passed to the request.
result
request-specific result value; basically, the value returned by corresponding system call.
req
is optional request resource which can be used with functions like eio_get_last_error()
`data` Arbitrary variable passed to callback.
Return Values
eio_fallocate() returns request resource on success or FALSE on error.
← eio_event_loop
eio_fchmod →
? 1997–2017 The PHP Documentation GroupLicensed under the Creative Commons Attribution License v3.0 or later.
本文档系腾讯云开发者社区成员共同维护，如有问题请联系 cloudcommunity@tencent.com
