diff options
Diffstat (limited to 'src/3rdparty/v8/src/atomicops_internals_arm_qnx.h')
-rw-r--r-- | src/3rdparty/v8/src/atomicops_internals_arm_qnx.h | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/src/3rdparty/v8/src/atomicops_internals_arm_qnx.h b/src/3rdparty/v8/src/atomicops_internals_arm_qnx.h new file mode 100644 index 0000000..39c9850 --- /dev/null +++ b/src/3rdparty/v8/src/atomicops_internals_arm_qnx.h @@ -0,0 +1,117 @@ +// Copyright 2012 Research in Motion. All rights reserved. +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following +// disclaimer in the documentation and/or other materials provided +// with the distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived +// from this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + + +#ifndef V8_ATOMICOPS_INTERNALS_ARM_QNX_H_ +#define V8_ATOMICOPS_INTERNALS_ARM_QNX_H_ + +#include <arm/cpuinline.h> +#include <arm/smpxchg.h> + +namespace v8 { +namespace internal { + +inline void MemoryBarrier() { + __cpu_membarrier(); +} + +inline Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32* ptr, + Atomic32 old_value, + Atomic32 new_value) { + return _smp_cmpxchg(reinterpret_cast<volatile unsigned*>(ptr), old_value, new_value); +} + +inline Atomic32 NoBarrier_AtomicExchange(volatile Atomic32* ptr, + Atomic32 new_value) { + return _smp_xchg(reinterpret_cast<volatile unsigned*>(ptr), new_value); +} + +inline Atomic32 NoBarrier_AtomicIncrement(volatile Atomic32* ptr, + Atomic32 increment) { + for (;;) { + // Atomic exchange the old value with an incremented one. + Atomic32 old_value = *ptr; + Atomic32 new_value = old_value + increment; + if (_smp_cmpxchg(reinterpret_cast<volatile unsigned*>(ptr), old_value, new_value)) { + // The exchange took place as expected. + return new_value; + } + // Otherwise, *ptr changed mid-loop and we need to retry. + } +} + +inline Atomic32 Barrier_AtomicIncrement(volatile Atomic32* ptr, + Atomic32 increment) { + MemoryBarrier(); + return NoBarrier_AtomicIncrement(ptr, increment); +} + +inline Atomic32 Acquire_CompareAndSwap(volatile Atomic32* ptr, + Atomic32 old_value, + Atomic32 new_value) { + return NoBarrier_CompareAndSwap(ptr, old_value, new_value); +} + +inline Atomic32 Release_CompareAndSwap(volatile Atomic32* ptr, + Atomic32 old_value, + Atomic32 new_value) { + return NoBarrier_CompareAndSwap(ptr, old_value, new_value); +} + +inline void NoBarrier_Store(volatile Atomic32* ptr, Atomic32 value) { + *ptr = value; +} + +inline void Acquire_Store(volatile Atomic32* ptr, Atomic32 value) { + *ptr = value; + MemoryBarrier(); +} + +inline void Release_Store(volatile Atomic32* ptr, Atomic32 value) { + MemoryBarrier(); + *ptr = value; +} + +inline Atomic32 NoBarrier_Load(volatile const Atomic32* ptr) { + return *ptr; +} + +inline Atomic32 Acquire_Load(volatile const Atomic32* ptr) { + Atomic32 value = *ptr; + MemoryBarrier(); + return value; +} + +inline Atomic32 Release_Load(volatile const Atomic32* ptr) { + MemoryBarrier(); + return *ptr; +} + +} } // namespace v8::internal + +#endif // V8_ATOMICOPS_INTERNALS_ARM_QNX_H_ + |