1explain_eventfd_or_die(3)  Library Functions Manual  explain_eventfd_or_die(3)
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NAME

6       explain_eventfd_or_die - create event notify file descriptor and report
7       errors
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SYNOPSIS

10       #include <libexplain/eventfd.h>
11       int explain_eventfd_or_die(unsigned int initval, int flags);
12       int explain_eventfd_on_error(unsigned int initval, int flags);
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DESCRIPTION

15       The explain_eventfd_or_die function is used to call the eventfd(2) sys‐
16       tem call. On failure an explanation will be printed to stderr, obtained
17       from the explain_eventfd(3) function, and then the  process  terminates
18       by calling exit(EXIT_FAILURE).
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20       The  explain_eventfd_on_error  function  is used to call the eventfd(2)
21       system call. On failure an  explanation  will  be  printed  to  stderr,
22       obtained from the explain_eventfd(3) function, but still returns to the
23       caller.
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25       initval The initval, exactly as to be passed to the  eventfd(2)  system
26               call.
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28       flags   The  flags,  exactly  as  to be passed to the eventfd(2) system
29               call.
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RETURN VALUE

32       The  explain_eventfd_or_die  function  only  returns  on  success,  see
33       eventfd(2)  for more information. On failure, prints an explanation and
34       exits, it does not return.
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36       The explain_eventfd_on_error function always returns the  value  return
37       by the wrapped eventfd(2) system call.
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EXAMPLE

40       The explain_eventfd_or_die function is intended to be used in a fashion
41       similar to the following example:
42              int result = explain_eventfd_or_die(initval, flags);
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SEE ALSO

45       eventfd(2)
46               create a file descriptor for event notification
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48       explain_eventfd(3)
49               explain eventfd(2) errors
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51       exit(2) terminate the calling process
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54       libexplain version 1.4
55       Copyright (C) 2009 Peter Miller
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59                                                     explain_eventfd_or_die(3)
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