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Unified Diff: third_party/tcmalloc/chromium/src/base/atomicops-internals-arm-v6plus.h

Issue 7050034: Merge google-perftools r109 (the current contents of third_party/tcmalloc/vendor) (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src/
Patch Set: '' Created 9 years, 6 months ago
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Index: third_party/tcmalloc/chromium/src/base/atomicops-internals-arm-v6plus.h
===================================================================
--- third_party/tcmalloc/chromium/src/base/atomicops-internals-arm-v6plus.h (revision 0)
+++ third_party/tcmalloc/chromium/src/base/atomicops-internals-arm-v6plus.h (revision 0)
@@ -0,0 +1,244 @@
+// Copyright (c) 2011, Google Inc.
+// 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.
+// ---
+//
+// Author: Sasha Levitskiy
+// based on atomicops-internals by Sanjay Ghemawat
+//
+// This file is an internal atomic implementation, use base/atomicops.h instead.
+//
+// This code implements ARM atomics for architectures V6 and newer.
+
+#ifndef BASE_ATOMICOPS_INTERNALS_ARM_V6PLUS_H_
+#define BASE_ATOMICOPS_INTERNALS_ARM_V6PLUS_H_
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "base/basictypes.h" // For COMPILE_ASSERT
+
+typedef int32_t Atomic32;
+
+namespace base {
+namespace subtle {
+
+typedef int64_t Atomic64;
+
+// 32-bit low-level ops
+
+inline Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32* ptr,
+ Atomic32 old_value,
+ Atomic32 new_value) {
+ Atomic32 oldval, res;
+ do {
+ __asm__ __volatile__(
+ "ldrex %1, [%3]\n"
+ "mov %0, #0\n"
+ "teq %1, %4\n"
+ "strexeq %0, %5, [%3]\n"
+ : "=&r" (res), "=&r" (oldval), "+Qo" (*ptr)
+ : "r" (ptr), "Ir" (old_value), "r" (new_value)
+ : "cc");
+ } while (res);
+ return oldval;
+}
+
+inline Atomic32 NoBarrier_AtomicExchange(volatile Atomic32* ptr,
+ Atomic32 new_value) {
+ Atomic32 tmp, old;
+ __asm__ __volatile__(
+ "1:\n"
+ "ldrex %1, [%2]\n"
+ "strex %0, %3, [%2]\n"
+ "teq %0, #0\n"
+ "bne 1b"
+ : "=&r" (tmp), "=&r" (old)
+ : "r" (ptr), "r" (new_value)
+ : "cc", "memory");
+ return old;
+}
+
+inline Atomic32 NoBarrier_AtomicIncrement(volatile Atomic32* ptr,
+ Atomic32 increment) {
+ Atomic32 tmp, res;
+ __asm__ __volatile__(
+ "1:\n"
+ "ldrex %1, [%2]\n"
+ "add %1, %1, %3\n"
+ "strex %0, %1, [%2]\n"
+ "teq %0, #0\n"
+ "bne 1b"
+ : "=&r" (tmp), "=&r"(res)
+ : "r" (ptr), "r"(increment)
+ : "cc", "memory");
+ return res;
+}
+
+inline void MemoryBarrier() {
+ __asm__ __volatile__("dmb" : : : "memory");
+}
+
+inline Atomic32 Barrier_AtomicIncrement(volatile Atomic32* ptr,
+ Atomic32 increment) {
+ Atomic32 tmp, res;
+ __asm__ __volatile__(
+ "1:\n"
+ "ldrex %1, [%2]\n"
+ "add %1, %1, %3\n"
+ "dmb\n"
+ "strex %0, %1, [%2]\n"
+ "teq %0, #0\n"
+ "bne 1b"
+ : "=&r" (tmp), "=&r"(res)
+ : "r" (ptr), "r"(increment)
+ : "cc", "memory");
+ return res;
+}
+
+inline Atomic32 Acquire_CompareAndSwap(volatile Atomic32* ptr,
+ Atomic32 old_value,
+ Atomic32 new_value) {
+ Atomic32 value = NoBarrier_CompareAndSwap(ptr, old_value, new_value);
+ MemoryBarrier();
+ return value;
+}
+
+inline Atomic32 Release_CompareAndSwap(volatile Atomic32* ptr,
+ Atomic32 old_value,
+ Atomic32 new_value) {
+ MemoryBarrier();
+ 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;
+}
+
+// 64-bit versions are not implemented yet.
+
+inline void NotImplementedFatalError(const char *function_name) {
+ fprintf(stderr, "64-bit %s() not implemented on this platform\n",
+ function_name);
+ abort();
+}
+
+inline Atomic64 NoBarrier_CompareAndSwap(volatile Atomic64* ptr,
+ Atomic64 old_value,
+ Atomic64 new_value) {
+ NotImplementedFatalError("NoBarrier_CompareAndSwap");
+ return 0;
+}
+
+inline Atomic64 NoBarrier_AtomicExchange(volatile Atomic64* ptr,
+ Atomic64 new_value) {
+ NotImplementedFatalError("NoBarrier_AtomicExchange");
+ return 0;
+}
+
+inline Atomic64 NoBarrier_AtomicIncrement(volatile Atomic64* ptr,
+ Atomic64 increment) {
+ NotImplementedFatalError("NoBarrier_AtomicIncrement");
+ return 0;
+}
+
+inline Atomic64 Barrier_AtomicIncrement(volatile Atomic64* ptr,
+ Atomic64 increment) {
+ NotImplementedFatalError("Barrier_AtomicIncrement");
+ return 0;
+}
+
+inline void NoBarrier_Store(volatile Atomic64* ptr, Atomic64 value) {
+ NotImplementedFatalError("NoBarrier_Store");
+}
+
+inline void Acquire_Store(volatile Atomic64* ptr, Atomic64 value) {
+ NotImplementedFatalError("Acquire_Store64");
+}
+
+inline void Release_Store(volatile Atomic64* ptr, Atomic64 value) {
+ NotImplementedFatalError("Release_Store");
+}
+
+inline Atomic64 NoBarrier_Load(volatile const Atomic64* ptr) {
+ NotImplementedFatalError("NoBarrier_Load");
+ return 0;
+}
+
+inline Atomic64 Acquire_Load(volatile const Atomic64* ptr) {
+ NotImplementedFatalError("Atomic64 Acquire_Load");
+ return 0;
+}
+
+inline Atomic64 Release_Load(volatile const Atomic64* ptr) {
+ NotImplementedFatalError("Atomic64 Release_Load");
+ return 0;
+}
+
+inline Atomic64 Acquire_CompareAndSwap(volatile Atomic64* ptr,
+ Atomic64 old_value,
+ Atomic64 new_value) {
+ NotImplementedFatalError("Atomic64 Acquire_CompareAndSwap");
+ return 0;
+}
+
+inline Atomic64 Release_CompareAndSwap(volatile Atomic64* ptr,
+ Atomic64 old_value,
+ Atomic64 new_value) {
+ NotImplementedFatalError("Atomic64 Release_CompareAndSwap");
+ return 0;
+}
+
+} // namespace subtle ends
+} // namespace base ends
+
+#endif // BASE_ATOMICOPS_INTERNALS_ARM_V6PLUS_H_
Property changes on: third_party/tcmalloc/chromium/src/base/atomicops-internals-arm-v6plus.h
___________________________________________________________________
Added: svn:eol-style
+ LF

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