Nonblocking.pread

Issues a pread request, filling the buffer as much as possible, expecting the user to suspend the caller manually.

This will read buf.length number of bytes from fd to buf, starting from offset.

class Nonblocking

Job*

pread

(

void[] buf

int fd

size_t offset

)

Parameters

buf void[]: buffer to fill
fd int: file descriptor to read from
offset size_t: offset in the file to read from
suspended_job JobNotification: suspended job to resume upon finishing the IO operation and calling finish_callback_dg

Type: Job*

Job that's scheduled

ErrnoException with appropriate errno set in case of failure