Add support for solaris atomicops

This patch adds support for atomic operations on Solaris, on any platform.
It makes use of the atomic functions made available in Solaris' atomic.h
header.

4 files changed, 205 insertions, 1 deletions

diff --git a/m4/acx_check_suncc.m4 b/m4/acx_check_suncc.m4
index 4e8f9610..89185932 100644
--- a/m4/acx_check_suncc.m4
+++ b/m4/acx_check_suncc.m4
@@ -42,6 +42,7 @@ AC_DEFUN([ACX_CHECK_SUNCC],[
 
         AS_IF([test "x$ac_enable_64bit" = "xyes"],[
 
+          AC_DEFINE([SOLARIS_64BIT_ENABLED], [1], [64bit enabled])
           AS_IF([test "x$libdir" = "x\${exec_prefix}/lib"],[
            dnl The user hasn't overridden the default libdir, so we'll
            dnl the dir suffix to match solaris 32/64-bit policy
diff --git a/src/google/protobuf/stubs/atomicops.h b/src/google/protobuf/stubs/atomicops.h
index 17b7be7f..b00f6db5 100644
--- a/src/google/protobuf/stubs/atomicops.h
+++ b/src/google/protobuf/stubs/atomicops.h
@@ -66,9 +66,10 @@ typedef int32 Atomic32;
 #ifdef GOOGLE_PROTOBUF_ARCH_64_BIT
 // We need to be able to go between Atomic64 and AtomicWord implicitly.  This
 // means Atomic64 and AtomicWord should be the same type on 64-bit.
-#if defined(__ILP32__) || defined(GOOGLE_PROTOBUF_OS_NACL)
+#if defined(__ILP32__) || defined(GOOGLE_PROTOBUF_OS_NACL) || defined(GOOGLE_PROTOBUF_ARCH_SPARC)
 // NaCl's intptr_t is not actually 64-bits on 64-bit!
 // http://code.google.com/p/nativeclient/issues/detail?id=1162
+// sparcv9's pointer type is 32bits
 typedef int64 Atomic64;
 #else
 typedef intptr_t Atomic64;
@@ -174,6 +175,10 @@ Atomic64 Release_Load(volatile const Atomic64* ptr);
 GOOGLE_PROTOBUF_ATOMICOPS_ERROR
 #endif
 
+// Solaris
+#elif defined(GOOGLE_PROTOBUF_OS_SOLARIS)
+#include <google/protobuf/stubs/atomicops_internals_solaris.h>
+
 // Apple.
 #elif defined(GOOGLE_PROTOBUF_OS_APPLE)
 #include <google/protobuf/stubs/atomicops_internals_macosx.h>
diff --git a/src/google/protobuf/stubs/atomicops_internals_solaris.h b/src/google/protobuf/stubs/atomicops_internals_solaris.h
new file mode 100644
index 00000000..1442dc27
--- /dev/null
+++ b/src/google/protobuf/stubs/atomicops_internals_solaris.h
@@ -0,0 +1,189 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2013 William Orr All rights reserved.
+// http://code.google.com/p/protobuf/
+//
+// 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.
+
+// This file is an internal atomic implementation, use atomicops.h instead.
+
+#ifndef GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_SPARC_GCC_H_
+#define GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_SPARC_GCC_H_
+
+#include <atomic.h>
+
+namespace google {
+namespace protobuf {
+namespace internal {
+
+inline Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32* ptr,
+                                         Atomic32 old_value,
+                                         Atomic32 new_value) {
+  return (Atomic32)atomic_cas_32((volatile uint32_t*)ptr, (uint32_t)old_value, (uint32_t)new_value);
+}
+
+inline Atomic32 NoBarrier_AtomicExchange(volatile Atomic32* ptr,
+                                         Atomic32 new_value) {
+  return (Atomic32)atomic_swap_32((volatile uint32_t*)ptr, (uint32_t)new_value);
+}
+
+inline Atomic32 NoBarrier_AtomicIncrement(volatile Atomic32* ptr,
+                                          Atomic32 increment) {
+  return (Atomic32)atomic_add_32_nv((volatile uint32_t*)ptr, (uint32_t)increment);
+}
+
+inline void MemoryBarrier(void) {
+	membar_producer();
+	membar_consumer();
+}
+
+inline Atomic32 Barrier_AtomicIncrement(volatile Atomic32* ptr,
+                                        Atomic32 increment) {
+  MemoryBarrier();
+  Atomic32 ret = NoBarrier_AtomicIncrement(ptr, increment);
+  MemoryBarrier();
+
+  return ret;
+}
+
+inline Atomic32 Acquire_CompareAndSwap(volatile Atomic32* ptr,
+                                       Atomic32 old_value,
+                                       Atomic32 new_value) {
+  Atomic32 ret = NoBarrier_CompareAndSwap(ptr, old_value, new_value);
+  MemoryBarrier();
+
+  return ret;
+}
+
+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;
+  membar_producer();
+}
+
+inline void Release_Store(volatile Atomic32* ptr, Atomic32 value) {
+  membar_consumer();
+  *ptr = value;
+}
+
+inline Atomic32 NoBarrier_Load(volatile const Atomic32* ptr) {
+  return *ptr;
+}
+
+inline Atomic32 Acquire_Load(volatile const Atomic32* ptr) {
+  Atomic32 val = *ptr;
+  membar_consumer();
+  return val;
+}
+
+inline Atomic32 Release_Load(volatile const Atomic32* ptr) {
+  membar_producer();
+  return *ptr;
+}
+
+#ifdef GOOGLE_PROTOBUF_ARCH_64_BIT
+inline Atomic64 NoBarrier_CompareAndSwap(volatile Atomic64* ptr,
+                                         Atomic64 old_value,
+                                         Atomic64 new_value) {
+  return atomic_cas_64((volatile uint64_t*)ptr, (uint64_t)old_value, (uint64_t)new_value);
+}
+
+inline Atomic64 NoBarrier_AtomicExchange(volatile Atomic64* ptr, Atomic64 new_value) {
+  return atomic_swap_64((volatile uint64_t*)ptr, (uint64_t)new_value);
+}
+
+inline Atomic64 NoBarrier_AtomicIncrement(volatile Atomic64* ptr, Atomic64 increment) {
+  return atomic_add_64_nv((volatile uint64_t*)ptr, increment);
+}
+
+inline Atomic64 Barrier_AtomicIncrement(volatile Atomic64* ptr, Atomic64 increment) {
+  MemoryBarrier();
+  Atomic64 ret = atomic_add_64_nv((volatile uint64_t*)ptr, increment);
+  MemoryBarrier();
+  return ret;
+}
+
+inline Atomic64 Acquire_CompareAndSwap(volatile Atomic64* ptr,
+                                       Atomic64 old_value,
+                                       Atomic64 new_value) {
+  Atomic64 ret = NoBarrier_CompareAndSwap(ptr, old_value, new_value);
+  MemoryBarrier();
+  return ret;
+}
+
+inline Atomic64 Release_CompareAndSwap(volatile Atomic64* ptr,
+                                       Atomic64 old_value,
+                                       Atomic64 new_value) {
+  MemoryBarrier();
+  return NoBarrier_CompareAndSwap(ptr, old_value, new_value);
+}
+
+inline void NoBarrier_Store(volatile Atomic64* ptr, Atomic64 value) {
+  *ptr = value;
+}
+
+inline void Acquire_Store(volatile Atomic64* ptr, Atomic64 value) {
+  *ptr = value;
+  membar_producer();
+}
+
+inline void Release_Store(volatile Atomic64* ptr, Atomic64 value) {
+  membar_consumer();
+  *ptr = value;
+}
+
+inline Atomic64 NoBarrier_Load(volatile const Atomic64* ptr) {
+  return *ptr;
+}
+
+inline Atomic64 Acquire_Load(volatile const Atomic64* ptr) {
+  Atomic64 ret = *ptr;
+  membar_consumer();
+  return ret;
+}
+
+inline Atomic64 Release_Load(volatile const Atomic64* ptr) {
+  membar_producer();
+  return *ptr;
+}
+#endif
+
+}  // namespace internal
+}  // namespace protobuf
+}  // namespace google
+
+#endif  // GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_SPARC_GCC_H_
+
diff --git a/src/google/protobuf/stubs/platform_macros.h b/src/google/protobuf/stubs/platform_macros.h
index 02186816..83259cb5 100644
--- a/src/google/protobuf/stubs/platform_macros.h
+++ b/src/google/protobuf/stubs/platform_macros.h
@@ -65,6 +65,13 @@
 #endif
 #elif defined(__pnacl__)
 #define GOOGLE_PROTOBUF_ARCH_32_BIT 1
+#elif defined(sparc)
+#define GOOGLE_PROTOBUF_ARCH_SPARC 1
+#ifdef SOLARIS_64BIT_ENABLED
+#define GOOGLE_PROTOBUF_ARCH_64_BIT 1
+#else
+#define GOOGLE_PROTOBUF_ARCH_32_BIT 1
+#endif
 #elif defined(__GNUC__)
 # if (((__GNUC__ == 4) && (__GNUC_MINOR__ >= 7)) || (__GNUC__ > 4))
 // We fallback to the generic Clang/GCC >= 4.7 implementation in atomicops.h
@@ -87,6 +94,8 @@ GOOGLE_PROTOBUF_PLATFORM_ERROR
 #define GOOGLE_PROTOBUF_OS_APPLE
 #elif defined(__native_client__)
 #define GOOGLE_PROTOBUF_OS_NACL
+#elif defined(sun)
+#define GOOGLE_PROTOBUF_OS_SOLARIS
 #endif
 
 #undef GOOGLE_PROTOBUF_PLATFORM_ERROR