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Borrowed from Debian to make atomic detection easier
From: Debian MySQL Maintainers <pkg-mysql-maint@lists.alioth.debian.org>
Date: Thu, 10 Aug 2017 20:40:29 +0200
Subject: c11_atomics
---
configure.cmake | 23 +++++++++++++++++++++--
include/atomic/gcc_builtins.h | 15 +++++++++++++++
include/atomic/nolock.h | 4 ++--
mysys/CMakeLists.txt | 4 ++++
sql/CMakeLists.txt | 4 ++++
5 files changed, 46 insertions(+), 4 deletions(-)
diff --git a/configure.cmake b/configure.cmake
index 0057c7f..43ad114 100644
--- a/configure.cmake
+++ b/configure.cmake
@@ -128,7 +128,7 @@ IF(UNIX)
ENDIF()
FIND_PACKAGE(Threads)
- SET(CMAKE_REQUIRED_LIBRARIES
+ LIST(APPEND CMAKE_REQUIRED_LIBRARIES
${LIBM} ${LIBNSL} ${LIBBIND} ${LIBCRYPT} ${LIBSOCKET} ${LIBDL} ${CMAKE_THREAD_LIBS_INIT} ${LIBRT} ${LIBEXECINFO})
# Need explicit pthread for gcc -fsanitize=address
IF(CMAKE_USE_PTHREADS_INIT AND CMAKE_C_FLAGS MATCHES "-fsanitize=")
@@ -1028,7 +1028,26 @@ ELSEIF(NOT WITH_ATOMIC_OPS)
long long int *ptr= &var;
return (int)__atomic_load_n(ptr, __ATOMIC_SEQ_CST);
}"
- HAVE_GCC_C11_ATOMICS)
+ HAVE_GCC_C11_ATOMICS_WITHOUT_LIBATOMIC)
+ IF(HAVE_GCC_C11_ATOMICS_WITHOUT_LIBATOMIC)
+ SET(HAVE_GCC_C11_ATOMICS True)
+ ELSE()
+ SET(OLD_CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES})
+ LIST(APPEND CMAKE_REQUIRED_LIBRARIES "atomic")
+ CHECK_CXX_SOURCE_COMPILES("
+ int main()
+ {
+ long long int var= 1;
+ long long int *ptr= &var;
+ return (int)__atomic_load_n(ptr, __ATOMIC_SEQ_CST);
+ }"
+ HAVE_GCC_C11_ATOMICS_WITH_LIBATOMIC)
+ IF(HAVE_GCC_C11_ATOMICS_WITH_LIBATOMIC)
+ SET(HAVE_GCC_C11_ATOMICS True)
+ ELSE()
+ SET(CMAKE_REQUIRED_LIBRARIES ${OLD_CMAKE_REQUIRED_LIBRARIES})
+ ENDIF()
+ ENDIF()
ELSE()
MESSAGE(FATAL_ERROR "${WITH_ATOMIC_OPS} is not a valid value for WITH_ATOMIC_OPS!")
ENDIF()
diff --git a/include/atomic/gcc_builtins.h b/include/atomic/gcc_builtins.h
index 56a0323..044be2e 100644
--- a/include/atomic/gcc_builtins.h
+++ b/include/atomic/gcc_builtins.h
@@ -16,6 +16,7 @@
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
+#if defined (HAVE_GCC_ATOMIC_BUILTINS)
#define make_atomic_add_body(S) \
v= __sync_fetch_and_add(a, v);
#define make_atomic_fas_body(S) \
@@ -26,6 +27,20 @@
sav= __sync_val_compare_and_swap(a, cmp_val, set);\
if (!(ret= (sav == cmp_val))) *cmp= sav
+#elif defined(HAVE_GCC_C11_ATOMICS)
+
+#define make_atomic_add_body(S) \
+ v= __atomic_fetch_add(a, v, __ATOMIC_SEQ_CST)
+#define make_atomic_fas_body(S) \
+ v= __atomic_exchange_n(a, v, __ATOMIC_SEQ_CST)
+#define make_atomic_cas_body(S) \
+ int ## S sav; \
+ ret= __atomic_compare_exchange_n(a, cmp, set, \
+ 0, \
+ __ATOMIC_SEQ_CST,\
+ __ATOMIC_SEQ_CST);
+#endif
+
#ifdef MY_ATOMIC_MODE_DUMMY
#define make_atomic_load_body(S) ret= *a
#define make_atomic_store_body(S) *a= v
diff --git a/include/atomic/nolock.h b/include/atomic/nolock.h
index 2137445..2ad7d98 100644
--- a/include/atomic/nolock.h
+++ b/include/atomic/nolock.h
@@ -17,7 +17,7 @@
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
#if defined(__i386__) || defined(_MSC_VER) || defined(__x86_64__) \
- || defined(HAVE_GCC_ATOMIC_BUILTINS) \
+ || defined(HAVE_GCC_ATOMIC_BUILTINS) || defined(HAVE_GCC_C11_ATOMICS) \
|| defined(HAVE_SOLARIS_ATOMIC)
# ifdef MY_ATOMIC_MODE_DUMMY
@@ -41,7 +41,7 @@
# elif __GNUC__
# if defined(HAVE_SOLARIS_ATOMIC)
# include "solaris.h"
-# elif defined(HAVE_GCC_ATOMIC_BUILTINS)
+# elif defined(HAVE_GCC_ATOMIC_BUILTINS) || defined(HAVE_GCC_C11_ATOMICS)
# include "gcc_builtins.h"
# elif defined(__i386__) || defined(__x86_64__)
# include "x86-gcc.h"
diff --git a/mysys/CMakeLists.txt b/mysys/CMakeLists.txt
index eb7f75e..a9221d7 100644
--- a/mysys/CMakeLists.txt
+++ b/mysys/CMakeLists.txt
@@ -78,6 +78,10 @@ IF(HAVE_BFD_H)
TARGET_LINK_LIBRARIES(mysys bfd)
ENDIF(HAVE_BFD_H)
+IF(HAVE_GCC_C11_ATOMICS_WITH_LIBATOMIC)
+ TARGET_LINK_LIBRARIES(mysys atomic)
+ENDIF()
+
IF (WIN32)
TARGET_LINK_LIBRARIES(mysys IPHLPAPI)
ENDIF(WIN32)
diff --git a/sql/CMakeLists.txt b/sql/CMakeLists.txt
index b4acac5..8247714 100644
--- a/sql/CMakeLists.txt
+++ b/sql/CMakeLists.txt
@@ -165,6 +165,10 @@ TARGET_LINK_LIBRARIES(sql ${MYSQLD_STATIC_PLUGIN_LIBS}
${SSL_LIBRARIES}
${LIBSYSTEMD})
+IF(HAVE_GCC_C11_ATOMICS_WITH_LIBATOMIC)
+ TARGET_LINK_LIBRARIES(sql atomic)
+ENDIF()
+
IF(WIN32)
SET(MYSQLD_SOURCE main.cc nt_servc.cc message.rc)
TARGET_LINK_LIBRARIES(sql psapi)
|
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