2001-03-11 Roland McGrath <roland@frob.com>
* sysdeps/generic/atomicity.h (exchange_and_add, atomic_add, compare_and_swap): Add volatile qualifier to first arg, to bring these prototypes in line with all the other implementations. Add a #warning to remind the builder that these are not atomic.
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@ -1,5 +1,5 @@
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/* Low-level functions for atomic operations. Stub version.
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Copyright (C) 1997 Free Software Foundation, Inc.
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Copyright (C) 1997,2001 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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@ -22,10 +22,11 @@
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#include <inttypes.h>
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#warning stub atomicity functions are not atomic
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static inline int
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__attribute__ ((unused))
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exchange_and_add (uint32_t *mem, int val)
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exchange_and_add (volatile uint32_t *mem, int val)
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{
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int result = *mem;
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*mem += val;
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@ -34,14 +35,14 @@ exchange_and_add (uint32_t *mem, int val)
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static inline void
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__attribute__ ((unused))
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atomic_add (uint32_t *mem, int val)
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atomic_add (volatile uint32_t *mem, int val)
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{
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*mem += val;
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}
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static inline int
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__attribute__ ((unused))
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compare_and_swap (long int *p, long int oldval, long int newval)
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compare_and_swap (volatile long int *p, long int oldval, long int newval)
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{
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if (*p != oldval)
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return 0;
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