From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Fri,  7 Nov 2014 00:05:44 +0300
From: Oleg <lego12239@yandex.ru>
To: 9fans@9fans.net
Message-ID: <20141106210544.GA20298@localhost>
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Subject: [9fans] atexit() & atexitdont()
Topicbox-Message-UUID: 244fb9f0-ead9-11e9-9d60-3106f5b1d025

  Hi, all.

I looked at atexit() and atexitdont() and i don't understand why these
functions are implemented with a static array instead of singly linked list?
May be somebody with a greater plan9 experience can help me with my question.

If i do:

#include <u.h>
#include <libc.h>

void f1(void)
{
  print("f1\n");
}

void f2(void)
{
  print("f2\n");
}

void main(int, char**)
{
  atexit(f1);
  atexit(f2);
  atexit(f1);

  atexitdont(f2);
  atexit(f2);

  exits(nil);
}

i get:

f1
f2
f1

instead of:

f1
f1
f2

because of atexit.c source code.

  Thanks.