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| explain_eventfd_or_die(3) | FreeBSD Library Functions Manual | explain_eventfd_or_die(3) |
NAME
explain_eventfd_or_die - create event notify file descriptor and report errorsSYNOPSIS
#include <libexplain/eventfd.h>int explain_eventfd_or_die(unsigned int initval, int flags);
int explain_eventfd_on_error(unsigned int initval, int flags);
DESCRIPTION
The explain_eventfd_or_die function is used to call the eventfd(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_eventfd(3) function, and then the process terminates by calling exit(EXIT_FAILURE).The explain_eventfd_on_error function is used to call the eventfd(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_eventfd(3) function, but still returns to the caller.
- initval
- The initval, exactly as to be passed to the eventfd(2) system call.
- flags
- The flags, exactly as to be passed to the eventfd(2) system call.
RETURN VALUE
The explain_eventfd_or_die function only returns on success, see eventfd(2) for more information. On failure, prints an explanation and exits, it does not return.The explain_eventfd_on_error function always returns the value return by the wrapped eventfd(2) system call.
EXAMPLE
The explain_eventfd_or_die function is intended to be used in a fashion similar to the following example:int result = explain_eventfd_or_die(initval, flags);
SEE ALSO
- eventfd(2)
- create a file descriptor for event notification
- explain_eventfd(3)
- explain eventfd(2) errors
- exit(2)
- terminate the calling process
COPYRIGHT
libexplain version 1.3Copyright (C) 2009 Peter Miller
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