Merge branch 'rickard/gcc-atomics/OTP-12383'

* rickard/gcc-atomics/OTP-12383:
  Improve ethread atomics based on GCC builtins

Conflicts:
	erts/aclocal.m4

1 files changed, 49 insertions, 19 deletions

diff --git a/erts/include/internal/ethread_header_config.h.in b/erts/include/internal/ethread_header_config.h.in
index 618fcba380..a9727568a2 100644
--- a/erts/include/internal/ethread_header_config.h.in
+++ b/erts/include/internal/ethread_header_config.h.in
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 2004-2011. All Rights Reserved.
+ * Copyright Ericsson AB 2004-2015. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -84,32 +84,62 @@
 /* Define if run in Sparc RMO, PSO, or TSO mode */
 #undef ETHR_SPARC_RMO
 
-/* Define if you have __sync_add_and_fetch() for 32-bit integers */
-#undef ETHR_HAVE___SYNC_ADD_AND_FETCH32
+/* Define as a boolean indicating whether you have a gcc compatible compiler
+   capable of generating the ARM DMB instruction, and are compiling for an ARM
+   processor with ARM DMB instruction support, or not */
+#undef ETHR_HAVE_GCC_ASM_ARM_DMB_INSTRUCTION
 
-/* Define if you have __sync_add_and_fetch() for 64-bit integers */
-#undef ETHR_HAVE___SYNC_ADD_AND_FETCH64
+/* Define as a bitmask corresponding to the word sizes that
+   __sync_synchronize() can handle on your system */
+#undef ETHR_HAVE___sync_synchronize
 
-/* Define if you have __sync_fetch_and_and() for 32-bit integers */
-#undef ETHR_HAVE___SYNC_FETCH_AND_AND32
+/* Define as a bitmask corresponding to the word sizes that
+   __sync_add_and_fetch() can handle on your system */
+#undef ETHR_HAVE___sync_add_and_fetch
 
-/* Define if you have __sync_fetch_and_and() for 64-bit integers */
-#undef ETHR_HAVE___SYNC_FETCH_AND_AND64
+/* Define as a bitmask corresponding to the word sizes that
+   __sync_fetch_and_and() can handle on your system */
+#undef ETHR_HAVE___sync_fetch_and_and
 
-/* Define if you have __sync_fetch_and_or() for 32-bit integers */
-#undef ETHR_HAVE___SYNC_FETCH_AND_OR32
+/* Define as a bitmask corresponding to the word sizes that
+   __sync_fetch_and_or() can handle on your system */
+#undef ETHR_HAVE___sync_fetch_and_or
 
-/* Define if you have __sync_fetch_and_or() for 64-bit integers */
-#undef ETHR_HAVE___SYNC_FETCH_AND_OR64
+/* Define as a bitmask corresponding to the word sizes that
+   __sync_val_compare_and_swap() can handle on your system */
+#undef ETHR_HAVE___sync_val_compare_and_swap
 
-/* Define if you have __sync_val_compare_and_swap() for 32-bit integers */
-#undef ETHR_HAVE___SYNC_VAL_COMPARE_AND_SWAP32
+/* Define as a boolean indicating whether you have a gcc __atomic builtins or
+   not */
+#undef ETHR_HAVE_GCC___ATOMIC_BUILTINS
 
-/* Define if you have __sync_val_compare_and_swap() for 64-bit integers */
-#undef ETHR_HAVE___SYNC_VAL_COMPARE_AND_SWAP64
+/* Define as a boolean indicating whether you trust gcc's __atomic_* builtins
+   memory barrier implementations, or not */
+#undef ETHR_TRUST_GCC_ATOMIC_BUILTINS_MEMORY_BARRIERS
 
-/* Define if you have __sync_val_compare_and_swap() for 128-bit integers */
-#undef ETHR_HAVE___SYNC_VAL_COMPARE_AND_SWAP128
+/* Define as a bitmask corresponding to the word sizes that __atomic_store_n()
+   can handle on your system */
+#undef ETHR_HAVE___atomic_store_n
+
+/* Define as a bitmask corresponding to the word sizes that __atomic_load_n()
+   can handle on your system */
+#undef ETHR_HAVE___atomic_load_n
+
+/* Define as a bitmask corresponding to the word sizes that
+   __atomic_add_fetch() can handle on your system */
+#undef ETHR_HAVE___atomic_add_fetch
+
+/* Define as a bitmask corresponding to the word sizes that
+   __atomic_fetch_and() can handle on your system */
+#undef ETHR_HAVE___atomic_fetch_and
+
+/* Define as a bitmask corresponding to the word sizes that
+   __atomic_fetch_or() can handle on your system */
+#undef ETHR_HAVE___atomic_fetch_or
+
+/* Define as a bitmask corresponding to the word sizes that
+   __atomic_compare_exchange_n() can handle on your system */
+#undef ETHR_HAVE___atomic_compare_exchange_n
 
 /* Define if you prefer gcc native ethread implementations */
 #undef ETHR_PREFER_GCC_NATIVE_IMPLS