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Changes to support ppc64le #238

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Changes to support ppc64le #238

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12 changes: 12 additions & 0 deletions port/atomic_pointer.h
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Original file line number Diff line number Diff line change
Expand Up @@ -36,6 +36,8 @@
#define ARCH_CPU_X86_FAMILY 1
#elif defined(__ARMEL__)
#define ARCH_CPU_ARM_FAMILY 1
#elif defined(__powerpc64__) && defined(__LITTLE_ENDIAN__)
#define ARCH_CPU_PPC64LE_FAMILY 1
#endif

namespace leveldb {
Expand Down Expand Up @@ -73,6 +75,15 @@ inline void MemoryBarrier() {
}
#define LEVELDB_HAVE_MEMORY_BARRIER

#elif defined(ARCH_CPU_PPC64LE_FAMILY) && defined(__GNUC__)
inline void MemoryBarrier() {
// See http://gcc.gnu.org/ml/gcc/2003-04/msg01180.html for a discussion on
// this idiom. Also see http://en.wikipedia.org/wiki/Memory_ordering.
__asm__ __volatile__("sync" : : : "memory");
}
#define LEVELDB_HAVE_MEMORY_BARRIER


// ARM Linux
#elif defined(ARCH_CPU_ARM_FAMILY) && defined(__linux__)
typedef void (*LinuxKernelMemoryBarrierFunc)(void);
Expand Down Expand Up @@ -147,6 +158,7 @@ class AtomicPointer {
#undef LEVELDB_HAVE_MEMORY_BARRIER
#undef ARCH_CPU_X86_FAMILY
#undef ARCH_CPU_ARM_FAMILY
#undef ARCH_CPU_PPC64LE_FAMILY

} // namespace port
} // namespace leveldb
Expand Down