blob: d0581455c7c0f43af62c9eb5eebf8cc572cd43f7 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
|
// Atomic functions.
// Copyright (C) 2010 Red Hat Inc.
//
// This file is part of systemtap, and is free software. You can
// redistribute it and/or modify it under the terms of the GNU General
// Public License (GPL); either version 2, or (at your option) any
// later version.
function atomic_long_read:long(addr:long)
%{ /* pure */
atomic_long_t *a = (atomic_long_t *)(long)THIS->addr;
/* We call deref() here to ensure the memory is valid to read.
* Note the result is thrown away, then we use the "real"
* atomic read function now that we know the address is safe. */
(void)deref(sizeof(*a), a);
THIS->__retvalue = atomic_long_read(a);
CATCH_DEREF_FAULT();
%}
|
