atomic_linux_aarch64.hpp revision 13477:4d61110c6046 
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25
26#ifndef OS_CPU_LINUX_AARCH64_VM_ATOMIC_LINUX_AARCH64_HPP
27#define OS_CPU_LINUX_AARCH64_VM_ATOMIC_LINUX_AARCH64_HPP
28
29#include "vm_version_aarch64.hpp"
30
31// Implementation of class atomic
32
33#define FULL_MEM_BARRIER  __sync_synchronize()
34#define READ_MEM_BARRIER  __atomic_thread_fence(__ATOMIC_ACQUIRE);
35#define WRITE_MEM_BARRIER __atomic_thread_fence(__ATOMIC_RELEASE);
36
37inline void Atomic::store    (jbyte    store_value, jbyte*    dest) { *dest = store_value; }
38inline void Atomic::store    (jshort   store_value, jshort*   dest) { *dest = store_value; }
39inline void Atomic::store    (jint     store_value, jint*     dest) { *dest = store_value; }
40inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; }
41inline void Atomic::store_ptr(void*    store_value, void*     dest) { *(void**)dest = store_value; }
42
43inline void Atomic::store    (jbyte    store_value, volatile jbyte*    dest) { *dest = store_value; }
44inline void Atomic::store    (jshort   store_value, volatile jshort*   dest) { *dest = store_value; }
45inline void Atomic::store    (jint     store_value, volatile jint*     dest) { *dest = store_value; }
46inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; }
47inline void Atomic::store_ptr(void*    store_value, volatile void*     dest) { *(void* volatile *)dest = store_value; }
48
49
50inline jint Atomic::add(jint add_value, volatile jint* dest)
51{
52 return __sync_add_and_fetch(dest, add_value);
53}
54
55inline void Atomic::inc(volatile jint* dest)
56{
57 add(1, dest);
58}
59
60inline void Atomic::inc_ptr(volatile void* dest)
61{
62 add_ptr(1, dest);
63}
64
65inline void Atomic::dec (volatile jint* dest)
66{
67 add(-1, dest);
68}
69
70inline void Atomic::dec_ptr(volatile void* dest)
71{
72 add_ptr(-1, dest);
73}
74
75inline jint Atomic::xchg (jint exchange_value, volatile jint* dest)
76{
77  jint res = __sync_lock_test_and_set (dest, exchange_value);
78  FULL_MEM_BARRIER;
79  return res;
80}
81
82inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest)
83{
84  return (void *) xchg_ptr((intptr_t) exchange_value,
85                           (volatile intptr_t*) dest);
86}
87
88template<size_t byte_size>
89template<typename T>
90inline T Atomic::PlatformCmpxchg<byte_size>::operator()(T exchange_value,
91                                                        T volatile* dest,
92                                                        T compare_value,
93                                                        cmpxchg_memory_order order) const {
94  STATIC_ASSERT(byte_size == sizeof(T));
95  if (order == memory_order_relaxed) {
96    T value = compare_value;
97    __atomic_compare_exchange(dest, &value, &exchange_value, /*weak*/false,
98                              __ATOMIC_RELAXED, __ATOMIC_RELAXED);
99    return value;
100  } else {
101    return __sync_val_compare_and_swap(dest, compare_value, exchange_value);
102  }
103}
104
105inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; }
106inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; }
107
108inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest)
109{
110 return __sync_add_and_fetch(dest, add_value);
111}
112
113inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest)
114{
115  return (void *) add_ptr(add_value, (volatile intptr_t *) dest);
116}
117
118inline void Atomic::inc_ptr(volatile intptr_t* dest)
119{
120 add_ptr(1, dest);
121}
122
123inline void Atomic::dec_ptr(volatile intptr_t* dest)
124{
125 add_ptr(-1, dest);
126}
127
128inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest)
129{
130  intptr_t res = __sync_lock_test_and_set (dest, exchange_value);
131  FULL_MEM_BARRIER;
132  return res;
133}
134
135inline jlong Atomic::load(const volatile jlong* src) { return *src; }
136
137#endif // OS_CPU_LINUX_AARCH64_VM_ATOMIC_LINUX_AARCH64_HPP
138