Fix broken android framework builds where 32-bit MIPS compilers lack 64-bit __sync operators.

src/ports/SkAtomics_sync.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkAtomics_sync_DEFINED
 #define SkAtomics_sync_DEFINED
 
 /** GCC/Clang __sync based atomics. */
 
 #include <stdint.h>
 
 static inline __attribute__((always_inline)) int32_t sk_atomic_inc(int32_t* addr) {
     return __sync_fetch_and_add(addr, 1);
 }
 
 static inline __attribute__((always_inline)) int64_t sk_atomic_inc(int64_t* addr) {
+#if defined(SK_BUILD_FOR_ANDROID_FRAMEWORK) && defined(__mips__) && !defined(__LP64__)

[petarj, 2014/07/18 16:41:04]

Can you remove this part: defined(SK_BUILD_FOR_ANDROID_FRAMEWORK) &&?
The problem is common for MIPS Linux build as well and it has just
broken MIPS Linux buildbot.

Thanks.

+    /** The 32-bit MIPS toolchain for the android framework is missing support
+     *  for __sync* functions that operate on 64-bit values. The workaround is
+     *  to use __atomic* functions until we can move everything to <stdatomic.h>.
+     */
+    return __atomic_fetch_add(addr, 1, __ATOMIC_SEQ_CST);
+#else
     return __sync_fetch_and_add(addr, 1);
+#endif
 }
 
 static inline __attribute__((always_inline)) int32_t sk_atomic_add(int32_t* addr, int32_t inc) {
     return __sync_fetch_and_add(addr, inc);
 }
 
 static inline __attribute__((always_inline)) int32_t sk_atomic_dec(int32_t* addr) {
     return __sync_fetch_and_add(addr, -1);
 }
 
 static inline __attribute__((always_inline)) void sk_membar_acquire__after_atomic_dec() { }
 
 static inline __attribute__((always_inline)) bool sk_atomic_cas(int32_t* addr,
                                                                 int32_t before,
                                                                 int32_t after) {
     return __sync_bool_compare_and_swap(addr, before, after);
 }
 
 static inline __attribute__((always_inline)) void* sk_atomic_cas(void** addr,
                                                                  void* before,
                                                                  void* after) {
     return __sync_val_compare_and_swap(addr, before, after);
 }
 
 static inline __attribute__((always_inline)) void sk_membar_acquire__after_atomic_conditional_inc() { }
 
 #endif