< prev index next >

src/hotspot/os_cpu/linux_aarch64/atomic_linux_aarch64.hpp

Print this page




  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 #ifndef OS_CPU_LINUX_AARCH64_ATOMIC_LINUX_AARCH64_HPP
  27 #define OS_CPU_LINUX_AARCH64_ATOMIC_LINUX_AARCH64_HPP
  28 
  29 #include "runtime/vm_version.hpp"
  30 
  31 // Implementation of class atomic
  32 // Note that memory_order_conservative requires a full barrier after atomic stores.
  33 // See https://patchwork.kernel.org/patch/3575821/
  34 
  35 template<size_t byte_size>
  36 struct Atomic::PlatformAdd
  37   : Atomic::AddAndFetch<Atomic::PlatformAdd<byte_size> >
  38 {
  39   template<typename I, typename D>
  40   D add_and_fetch(I add_value, D volatile* dest, atomic_memory_order order) const {
  41     D res = __atomic_add_fetch(dest, add_value, __ATOMIC_RELEASE);
  42     FULL_MEM_BARRIER;
  43     return res;
  44   }
  45 };
  46 
  47 template<size_t byte_size>
  48 template<typename T>
  49 inline T Atomic::PlatformXchg<byte_size>::operator()(T exchange_value,
  50                                                      T volatile* dest,
  51                                                      atomic_memory_order order) const {
  52   STATIC_ASSERT(byte_size == sizeof(T));
  53   T res = __atomic_exchange_n(dest, exchange_value, __ATOMIC_RELEASE);
  54   FULL_MEM_BARRIER;
  55   return res;
  56 }
  57 
  58 template<size_t byte_size>
  59 template<typename T>
  60 inline T Atomic::PlatformCmpxchg<byte_size>::operator()(T exchange_value,




  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 #ifndef OS_CPU_LINUX_AARCH64_ATOMIC_LINUX_AARCH64_HPP
  27 #define OS_CPU_LINUX_AARCH64_ATOMIC_LINUX_AARCH64_HPP
  28 
  29 #include "runtime/vm_version.hpp"
  30 
  31 // Implementation of class atomic
  32 // Note that memory_order_conservative requires a full barrier after atomic stores.
  33 // See https://patchwork.kernel.org/patch/3575821/
  34 
  35 template<size_t byte_size>
  36 struct Atomic::PlatformAdd
  37   : Atomic::AddAndFetch<Atomic::PlatformAdd<byte_size> >
  38 {
  39   template<typename D, typename I>
  40   D add_and_fetch(D volatile* dest, I add_value, atomic_memory_order order) const {
  41     D res = __atomic_add_fetch(dest, add_value, __ATOMIC_RELEASE);
  42     FULL_MEM_BARRIER;
  43     return res;
  44   }
  45 };
  46 
  47 template<size_t byte_size>
  48 template<typename T>
  49 inline T Atomic::PlatformXchg<byte_size>::operator()(T exchange_value,
  50                                                      T volatile* dest,
  51                                                      atomic_memory_order order) const {
  52   STATIC_ASSERT(byte_size == sizeof(T));
  53   T res = __atomic_exchange_n(dest, exchange_value, __ATOMIC_RELEASE);
  54   FULL_MEM_BARRIER;
  55   return res;
  56 }
  57 
  58 template<size_t byte_size>
  59 template<typename T>
  60 inline T Atomic::PlatformCmpxchg<byte_size>::operator()(T exchange_value,


< prev index next >