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add atomic support #261

Merged
merged 8 commits into from
Mar 8, 2022
Merged

add atomic support #261

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f34fd93
add C11 and builtin atomic support
sreimers Mar 7, 2022
4f380b6
cmake: fix HAVE_ATOMIC
sreimers Mar 7, 2022
9e09a46
fix pedantic and better builtin checks
sreimers Mar 7, 2022
4c9f306
cleanup
sreimers Mar 7, 2022
c4f515e
add description and fix format
sreimers Mar 7, 2022
a685a87
allow multiple includes
sreimers Mar 8, 2022
4d17992
add gcc version check (gcc >= 4.9)
sreimers Mar 8, 2022
cc0f585
add some comments
sreimers Mar 8, 2022
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1 change: 1 addition & 0 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -81,6 +81,7 @@ if(CMAKE_USE_PTHREADS_INIT)
endif()

add_definitions(
-DHAVE_ATOMIC
-DHAVE_INET6
-DHAVE_SELECT
)
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37 changes: 37 additions & 0 deletions include/re_atomic.h
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Original file line number Diff line number Diff line change
@@ -0,0 +1,37 @@
/**
* @file re_atomic.h Atomic support
*
* Copyright (C) 2022 Sebastian Reimers
*/

#ifndef RE_H_ATOMIC__
#define RE_H_ATOMIC__

#ifdef __cplusplus
extern "C" {
#endif

/* C11 */
#ifdef HAVE_ATOMIC
#include <stdatomic.h>

/* C99 */
#elif defined(__clang__)
#define __CLANG_ATOMICS

#elif defined(__GNUC__)
#if __GNUC_PREREQ(4, 9)
#define __SYNC_ATOMICS
#else
#error "Atomic requires gcc >= 4.9"
#endif /* __GNUC_PREREQ */

#else
#error "Your compiler does not support atomics"
#endif /* HAVE_ATOMIC */

#ifdef __cplusplus
}
#endif

#endif /* RE_H_ATOMIC__ */
3 changes: 1 addition & 2 deletions mk/re.mk
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Expand Up @@ -339,10 +339,9 @@ CFLAGS += -std=c11
HAVE_ATOMIC := 1
endif

CFLAGS += -pedantic

ifneq ($(HAVE_ATOMIC),)
CFLAGS += -DHAVE_ATOMIC
CFLAGS += -pedantic
endif


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