Subversion Repositories HelenOS-historic

Rev

Rev 111 | Rev 116 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 111 Rev 115
Line 29... Line 29...
29 
#ifndef __ia32_ATOMIC_H__
 29 
#ifndef __ia32_ATOMIC_H__
30 
#define __ia32_ATOMIC_H__
 30 
#define __ia32_ATOMIC_H__
31 
 
 31 
 
32 
#include <arch/types.h>
 32 
#include <arch/types.h>
33 
 
 33 
 
34 
extern void atomic_inc(volatile int *val);
 34 
static inline void atomic_inc(volatile int *val) {
- 
 
 35 
#ifdef __SMP__
- 
 
 36 
    __asm__ volatile ("lock incl (%0)\n" : : "r" (val));
- 
 
 37 
#else
- 
 
 38 
    __asm__ volatile ("incl (%0)\n" : : "r" (val));
- 
 
 39 
#endif /* __SMP__ */
- 
 
 40 
}
- 
 
 41 
 
35 
extern void atomic_dec(volatile int *val);
 42 
static inline void atomic_dec(volatile int *val) {
- 
 
 43 
#ifdef __SMP__
- 
 
 44 
    __asm__ volatile ("lock decl (%0)\n" : : "r" (val));
- 
 
 45 
#else
- 
 
 46 
    __asm__ volatile ("decl (%0)\n" : : "r" (val));
- 
 
 47 
#endif /* __SMP__ */
- 
 
 48 
}
- 
 
 49 
 
- 
 
 50 
static inline int test_and_set(int *val) {
- 
 
 51 
    int v;
- 
 
 52 
   
- 
 
 53 
    __asm__ volatile (
- 
 
 54 
        "movl $1, %0\n"
- 
 
 55 
        "xchgl %0, (%1)\n"
- 
 
 56 
        : "=r" (v)
- 
 
 57 
        : "r" (val)
- 
 
 58 
    );
- 
 
 59 
   
- 
 
 60 
    return v;
- 
 
 61 
}
- 
 
 62 
 
36 
 
 63 
 
37 
extern int test_and_set(int *val);
 - 
 
38 
extern void spinlock_arch(int *val);
 64 
extern void spinlock_arch(int *val);
39 
 
 65 
 
40 
#endif
 66 
#endif