Expose transferable constructor to Int8List

runtime/vm/os_android.cc

Index: runtime/vm/os_android.cc
diff --git a/runtime/vm/os_android.cc b/runtime/vm/os_android.cc
index a33effe8d2cf6449111576eee79d49a8470ad2f7..b3b661fa0ab234c77010c8d79c0babe1c6569504 100644
--- a/runtime/vm/os_android.cc
+++ b/runtime/vm/os_android.cc
@@ -10,6 +10,7 @@
 #include <sys/resource.h>
 #include <sys/time.h>
 #include <sys/types.h>
+#include <malloc.h>

[cshapiro, 2012/11/29 21:28:17]

This should be kept sorted.  Move it to line 9.

[Cutch, 2012/11/29 23:53:17]

Done.

 #include <unistd.h>
 
 #include "platform/utils.h"
@@ -67,6 +68,21 @@ int64_t OS::GetCurrentTimeMicros() {
 }
 
 
+void* OS::AlignedAllocate(intptr_t size, intptr_t alignment) {
+  const int kMinimumAlignment = 16;
+  ASSERT(Utils::IsPowerOfTwo(alignment));
+  ASSERT(alignment >= kMinimumAlignment);
+  void* p = memalign(alignment, size);

[cshapiro, 2012/11/29 21:28:17]

I would follow the example of gettimeofday on line 63

  void* result = memalign(alignment, size)
  if (result == NULL) {
    UNREACHABLE();
  }
  return result;

as we are generally not prepared to handle malloc failures

[Cutch, 2012/11/29 23:53:17]

Done.

+  ASSERT(p != NULL);
+  return p;
+}
+
+
+void OS::AlignedFree(void* ptr) {
+  free(ptr);
+}
+
+
 // TODO(5411554):  May need to hoist these architecture dependent code
 // into a architecture specific file e.g: os_ia32_linux.cc
 word OS::ActivationFrameAlignment() {