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6f61488f21
* The following files goes into the directory arch/x86/include/asm unmodified: - include/atomic.h, - include/linkage.h, - include/memcpy_64.h, - include/types.h, - include/bitops.h, - pie/parasite-head-x86-64.S, - include/processor-flags.h, - include/syscall-x86-64.def. * Changed include directives in the source files that include the headers listed above. * Modified build scripts to reflect the source moves. Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com> Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
60 lines
1.2 KiB
C
60 lines
1.2 KiB
C
#ifndef __CR_ATOMIC_H__
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#define __CR_ATOMIC_H__
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#include "asm/types.h"
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typedef struct {
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u32 counter;
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} atomic_t;
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#define atomic_set(mem, v) \
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({ \
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u32 ret__ = v; \
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asm volatile ("lock xchg %0, %1\n" \
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: "+r" (ret__), "+m" ((mem)->counter) \
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: \
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: "cc", "memory"); \
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})
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#define atomic_get(mem) \
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({ \
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u32 ret__ = 0; \
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asm volatile ("lock xadd %0, %1\n" \
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: "+r" (ret__), "+m" ((mem)->counter) \
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: \
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: "cc", "memory"); \
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ret__; \
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})
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#define atomic_inc(mem) \
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({ \
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u32 ret__ = 1; \
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asm volatile ("lock xadd %0, %1\n" \
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: "+r" (ret__), "+m" ((mem)->counter) \
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: \
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: "cc", "memory"); \
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ret__; \
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})
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#define atomic_dec(mem) \
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({ \
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u32 ret__ = -1; \
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asm volatile ("lock xadd %0, %1\n" \
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: "+r" (ret__), "+m" ((mem)->counter) \
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: \
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: "cc", "memory"); \
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ret__; \
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})
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/* true if the result is 0, or false for all other cases. */
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#define atomic_dec_and_test(mem) \
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({ \
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unsigned char ret__; \
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asm volatile ("lock decl %0; sete %1\n" \
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: "+m" ((mem)->counter), "=qm" (ret__) \
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: \
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: "cc", "memory"); \
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ret__ != 0; \
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})
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#endif /* __CR_ATOMIC_H__ */
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