ICU 56 step 4: Apply post-56 fixes for measure/date format

patches/mutex.patch

-diff --git a/source/common/putilimp.h b/source/common/putilimp.h
-index e3da340..90bae92 100644
---- a/source/common/putilimp.h
-+++ b/source/common/putilimp.h
-@@ -1,7 +1,7 @@
- /*
- ******************************************************************************
- *
--*   Copyright (C) 1997-2014, International Business Machines
-+*   Copyright (C) 1997-2015, International Business Machines
- *   Corporation and others.  All Rights Reserved.
- *
- ******************************************************************************
-@@ -229,6 +229,26 @@ typedef size_t uintptr_t;
- #endif
- 
- 
-+/**
-+ *  \def U_HAVE_CLANG_ATOMICS
-+ *  Defines whether Clang c11 style built-in atomics are avaialable.
-+ *  These are used in preference to gcc atomics when both are available.
-+ */
-+#ifdef U_HAVE_CLANG_ATOMICS
-+    /* Use the predefined value. */
-+#elif !defined(__clang__)
-+#    define U_HAVE_CLANG_ATOMICS 0
-+#else
-+#if __has_builtin(__c11_atomic_load) && \
-+    __has_builtin(__c11_atomic_store) && \
-+    __has_builtin(__c11_atomic_fetch_add) && \
-+    __has_builtin(__c11_atomic_fetch_sub)
-+#    define U_HAVE_CLANG_ATOMICS 1
-+#else
-+#    define U_HAVE_CLANG_ATOMICS 0
-+#endif
-+#endif
-+
- /*===========================================================================*/
- /** @{ Code alignment                                                        */
- /*===========================================================================*/
-diff --git a/source/common/umutex.cpp b/source/common/umutex.cpp
-index 0c1fdc8..581f2b9 100644
---- a/source/common/umutex.cpp
-+++ b/source/common/umutex.cpp
-@@ -349,8 +349,8 @@ umtx_atomic_dec(u_atomic_int32_t *p) {
- 
- U_COMMON_API int32_t U_EXPORT2
- umtx_loadAcquire(u_atomic_int32_t &var) {
--    int32_t val = var;
-     umtx_lock(&gIncDecMutex);
-+    int32_t val = var;
-     umtx_unlock(&gIncDecMutex);
-     return val;
- }
-@@ -358,8 +358,8 @@ umtx_loadAcquire(u_atomic_int32_t &var) {
- U_COMMON_API void U_EXPORT2
- umtx_storeRelease(u_atomic_int32_t &var, int32_t val) {
-     umtx_lock(&gIncDecMutex);
--    umtx_unlock(&gIncDecMutex);
-     var = val;
-+    umtx_unlock(&gIncDecMutex);
- }
- 
- U_NAMESPACE_END
-diff --git a/source/common/umutex.h b/source/common/umutex.h
-index e0ad0d3..0e4d118 100644
---- a/source/common/umutex.h
-+++ b/source/common/umutex.h
-@@ -1,6 +1,6 @@
- /*
- **********************************************************************
--*   Copyright (C) 1997-2014, International Business Machines
-+*   Copyright (C) 1997-2015, International Business Machines
- *   Corporation and others.  All Rights Reserved.
- **********************************************************************
- *
-@@ -118,6 +118,33 @@ inline int32_t umtx_atomic_dec(u_atomic_int32_t *var) {
- U_NAMESPACE_END
- 
- 
-+#elif U_HAVE_CLANG_ATOMICS
-+/*
-+ *  Clang __c11 atomic built-ins
-+ */
-+
-+U_NAMESPACE_BEGIN
-+typedef _Atomic(int32_t) u_atomic_int32_t;
-+#define ATOMIC_INT32_T_INITIALIZER(val) val
-+
-+inline int32_t umtx_loadAcquire(u_atomic_int32_t &var) {
-+     return __c11_atomic_load(&var, __ATOMIC_ACQUIRE);
-+}
-+
-+inline void umtx_storeRelease(u_atomic_int32_t &var, int32_t val) {
-+   return __c11_atomic_store(&var, val, __ATOMIC_RELEASE);
-+}
-+
-+inline int32_t umtx_atomic_inc(u_atomic_int32_t *var) {
-+    return __c11_atomic_fetch_add(var, 1, __ATOMIC_SEQ_CST) + 1;
-+}
-+
-+inline int32_t umtx_atomic_dec(u_atomic_int32_t *var) {
-+    return __c11_atomic_fetch_sub(var, 1, __ATOMIC_SEQ_CST) - 1;
-+}
-+U_NAMESPACE_END
-+
-+
- #elif U_HAVE_GCC_ATOMICS
- /*
-  * gcc atomic ops. These are available on several other compilers as well.