AIX:Proposal to use kSemaphoreAlignmentMask instead kPointerAlignmentMask

src/base/platform/semaphore.cc

Index: src/base/platform/semaphore.cc
diff --git a/src/base/platform/semaphore.cc b/src/base/platform/semaphore.cc
index 6225b1655f881fe4fe3ff47f8c1912d9d5995181..8fff809463759c0cfcdea7e6ed77b487f358cd30 100644
--- a/src/base/platform/semaphore.cc
+++ b/src/base/platform/semaphore.cc
@@ -78,7 +78,12 @@ Semaphore::Semaphore(int count) {
   // Unaligned native handle can later cause a failure in semaphore signal.
   // Check the alignment here to catch the failure earlier.
   // Context: crbug.com/605349.
+#if V8_OS_AIX
+  // On aix sem_t is of type int
+  const uintptr_t kPointerAlignmentMask = sizeof(int) - 1;

[jochen (gone - plz use gerrit), 2016/05/03 11:03:09]

please keep to rename of kPointerAlignmentMask to kSemaphoreAlignmentMask

+#else
   const uintptr_t kPointerAlignmentMask = sizeof(void*) - 1;
+#endif
   CHECK_EQ(
       0, reinterpret_cast<uintptr_t>(&native_handle_) & kPointerAlignmentMask);
   DCHECK(count >= 0);