Subversion Repositories HelenOS

Rev

Rev 3022 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 3022 Rev 4055
Line 35... Line 35...
35 
#ifndef KERN_ia64_ATOMIC_H_
 35 
#ifndef KERN_ia64_ATOMIC_H_
36 
#define KERN_ia64_ATOMIC_H_
 36 
#define KERN_ia64_ATOMIC_H_
37 
 
 37 
 
38 
/** Atomic addition.
 38 
/** Atomic addition.
39 
 *
 39 
 *
40 
 * @param val Atomic value.
 40 
 * @param val       Atomic value.
41 
 * @param imm Value to add.
 41 
 * @param imm       Value to add.
42 
 *
 42 
 *
43 
 * @return Value before addition.
 43 
 * @return      Value before addition.
44 
 */
 44 
 */
45 
static inline long atomic_add(atomic_t *val, int imm)
 45 
static inline long atomic_add(atomic_t *val, int imm)
46 
{
 46 
{
47 
    long v;
 47 
    long v;
48 
 
 48 
 
49 
    asm volatile ("fetchadd8.rel %0 = %1, %2\n" : "=r" (v), "+m" (val->count) : "i" (imm));
 49 
    asm volatile ("fetchadd8.rel %0 = %1, %2\n" : "=r" (v),
- 
 
 50 
        "+m" (val->count) : "i" (imm));
50 
 
 51 
 
51 
    return v;
 52 
    return v;
52 
}
 53 
}
53 
 
 54 
 
54 
static inline void atomic_inc(atomic_t *val) { atomic_add(val, 1); }
 - 
 
55 
static inline void atomic_dec(atomic_t *val) { atomic_add(val, -1); }
 - 
 
56 
 
 55 
 
- 
 
 56 
static inline uint64_t test_and_set(atomic_t *val) {
- 
 
 57 
    uint64_t v;
- 
 
 58 
       
- 
 
 59 
    asm volatile (
- 
 
 60 
        "movl %0 = 0x01;;\n"
- 
 
 61 
        "xchg8 %0 = %1, %0;;\n"
- 
 
 62 
        : "=r" (v), "+m" (val->count)
- 
 
 63 
    );
- 
 
 64 
   
- 
 
 65 
    return v;
- 
 
 66 
}
- 
 
 67 
 
- 
 
 68 
 
- 
 
 69 
static inline void atomic_inc(atomic_t *val)
- 
 
 70 
{
- 
 
 71 
    atomic_add(val, 1);
- 
 
 72 
}
- 
 
 73 
 
- 
 
 74 
static inline void atomic_dec(atomic_t *val)
- 
 
 75 
{
- 
 
 76 
    atomic_add(val, -1);
- 
 
 77 
}
- 
 
 78 
 
57 
static inline long atomic_preinc(atomic_t *val) { return atomic_add(val, 1) + 1; }
 79 
static inline long atomic_preinc(atomic_t *val)
- 
 
 80 
{
- 
 
 81 
    return atomic_add(val, 1) + 1;
- 
 
 82 
}
- 
 
 83 
 
58 
static inline long atomic_predec(atomic_t *val) { return atomic_add(val, -1) - 1; }
 84 
static inline long atomic_predec(atomic_t *val)
- 
 
 85 
{
- 
 
 86 
    return atomic_add(val, -1) - 1;
- 
 
 87 
}
59 
 
 88 
 
60 
static inline long atomic_postinc(atomic_t *val) { return atomic_add(val, 1); }
 89 
static inline long atomic_postinc(atomic_t *val)
- 
 
 90 
{
- 
 
 91 
    return atomic_add(val, 1);
- 
 
 92 
}
- 
 
 93 
 
61 
static inline long atomic_postdec(atomic_t *val) { return atomic_add(val, -1); }
 94 
static inline long atomic_postdec(atomic_t *val)
- 
 
 95 
{
- 
 
 96 
    return atomic_add(val, -1);
- 
 
 97 
}
62 
 
 98 
 
63 
#endif
 99 
#endif
64 
 
 100 
 
65 
/** @}
 101 
/** @}
66 
 */
 102 
 */