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// 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 */
#ifdef ATOMIC_LONG_INIT
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();
#endif
%}
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