1 // Copyright 2014 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // This file is an internal atomic implementation, use atomicops.h instead. 6 7 #ifndef V8_BASE_ATOMICOPS_INTERNALS_ATOMICWORD_COMPAT_H_ 8 #define V8_BASE_ATOMICOPS_INTERNALS_ATOMICWORD_COMPAT_H_ 9 10 // AtomicWord is a synonym for intptr_t, and Atomic32 is a synonym for int32, 11 // which in turn means int. On some LP32 platforms, intptr_t is an int, but 12 // on others, it's a long. When AtomicWord and Atomic32 are based on different 13 // fundamental types, their pointers are incompatible. 14 // 15 // This file defines function overloads to allow both AtomicWord and Atomic32 16 // data to be used with this interface. 17 // 18 // On LP64 platforms, AtomicWord and Atomic64 are both always long, 19 // so this problem doesn't occur. 20 21 #if !defined(V8_HOST_ARCH_64_BIT) 22 23 namespace v8 { 24 namespace base { 25 26 inline AtomicWord NoBarrier_CompareAndSwap(volatile AtomicWord* ptr, 27 AtomicWord old_value, 28 AtomicWord new_value) { 29 return NoBarrier_CompareAndSwap( 30 reinterpret_cast<volatile Atomic32*>(ptr), old_value, new_value); 31 } 32 33 inline AtomicWord NoBarrier_AtomicExchange(volatile AtomicWord* ptr, 34 AtomicWord new_value) { 35 return NoBarrier_AtomicExchange( 36 reinterpret_cast<volatile Atomic32*>(ptr), new_value); 37 } 38 39 inline AtomicWord NoBarrier_AtomicIncrement(volatile AtomicWord* ptr, 40 AtomicWord increment) { 41 return NoBarrier_AtomicIncrement( 42 reinterpret_cast<volatile Atomic32*>(ptr), increment); 43 } 44 45 inline AtomicWord Barrier_AtomicIncrement(volatile AtomicWord* ptr, 46 AtomicWord increment) { 47 return Barrier_AtomicIncrement( 48 reinterpret_cast<volatile Atomic32*>(ptr), increment); 49 } 50 51 inline AtomicWord Acquire_CompareAndSwap(volatile AtomicWord* ptr, 52 AtomicWord old_value, 53 AtomicWord new_value) { 54 return v8::base::Acquire_CompareAndSwap( 55 reinterpret_cast<volatile Atomic32*>(ptr), old_value, new_value); 56 } 57 58 inline AtomicWord Release_CompareAndSwap(volatile AtomicWord* ptr, 59 AtomicWord old_value, 60 AtomicWord new_value) { 61 return v8::base::Release_CompareAndSwap( 62 reinterpret_cast<volatile Atomic32*>(ptr), old_value, new_value); 63 } 64 65 inline void NoBarrier_Store(volatile AtomicWord *ptr, AtomicWord value) { 66 NoBarrier_Store( 67 reinterpret_cast<volatile Atomic32*>(ptr), value); 68 } 69 70 inline void Release_Store(volatile AtomicWord* ptr, AtomicWord value) { 71 return v8::base::Release_Store( 72 reinterpret_cast<volatile Atomic32*>(ptr), value); 73 } 74 75 inline AtomicWord NoBarrier_Load(volatile const AtomicWord *ptr) { 76 return NoBarrier_Load( 77 reinterpret_cast<volatile const Atomic32*>(ptr)); 78 } 79 80 inline AtomicWord Acquire_Load(volatile const AtomicWord* ptr) { 81 return v8::base::Acquire_Load( 82 reinterpret_cast<volatile const Atomic32*>(ptr)); 83 } 84 85 } // namespace base 86 } // namespace v8 87 88 #endif // !defined(V8_HOST_ARCH_64_BIT) 89 90 #endif // V8_BASE_ATOMICOPS_INTERNALS_ATOMICWORD_COMPAT_H_ 91