2014/10/15 下午 10:08:55

iphone Programming Glossary: fd

How can I be notified when a dispatch_async task is complete?

http://stackoverflow.com/questions/3379008/how-can-i-be-notified-when-a-dispatch-async-task-is-complete

is just an example of nested blocks. dispatch_retain destination_queue dispatch_async obj queue ^ ssize_t r read obj fd where bytes int err errno dispatch_async destination_queue ^ reply_block r err dispatch_release destination_queue ..

Fork() on iPhone

http://stackoverflow.com/questions/3619252/fork-on-iphone

by pipe with the parent thread. Child and parent threads can communicate via pipes. For example my child thread dup2 fd 1 to its standard output. So any standard output could be caught in the parent thread. Similar to fd 0 and standard input... child thread dup2 fd 1 to its standard output. So any standard output could be caught in the parent thread. Similar to fd 0 and standard input. Pseudocode I don't have the code available but you get the idea int fd 2 pipe fd create_posix_thread.. parent thread. Similar to fd 0 and standard input. Pseudocode I don't have the code available but you get the idea int fd 2 pipe fd create_posix_thread myThread fd char buffer 1024 read fd 0 buffer 1024 printf s buffer Hello World void myThread..

on iOS/iPhone: “Too many open files”: need to list open files (like lsof)

http://stackoverflow.com/questions/4083608/on-ios-iphone-too-many-open-files-need-to-list-open-files-like-lsof

this question #import sys types.h #import fcntl.h #import errno.h #import sys param.h void lsof int flags int fd char buf MAXPATHLEN 1 int n 1 for fd 0 fd int FD_SETSIZE fd errno 0 flags fcntl fd F_GETFD 0 if flags 1 errno if errno.. #import fcntl.h #import errno.h #import sys param.h void lsof int flags int fd char buf MAXPATHLEN 1 int n 1 for fd 0 fd int FD_SETSIZE fd errno 0 flags fcntl fd F_GETFD 0 if flags 1 errno if errno EBADF return else continue fcntl.. #import fcntl.h #import errno.h #import sys param.h void lsof int flags int fd char buf MAXPATHLEN 1 int n 1 for fd 0 fd int FD_SETSIZE fd errno 0 flags fcntl fd F_GETFD 0 if flags 1 errno if errno EBADF return else continue fcntl fd F_GETPATH..