904f6923b8
The atomic operations exported by the platform's C library do not provide full memory barriers. This can result in incorrect results when NDK machine code linked against them runs on multi-core devices. While the bug has been fixed in the platform, this NDK header change ensures that any source code that includes <sys/atomics.h> will end up using a correct implementation of these functions, based on the corresponding GCC builtins. These builtins always provide a full barrier and have reasonable performance. Application developers who depend on <sys/atomics.h> should recompile their unmodified sources against this version of the NDK as soon as possible. Change-Id: Ife165d09dceffdcd768b69c072d253cac898419c