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configure: Check for __atomic_add_fetch() and __atomic_load()

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To be used in the tdb_seqnum code soon

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This commit is contained in:
Volker Lendecke 2021-12-13 17:40:52 +01:00 committed by Jeremy Allison
parent 1dc803048f
commit 62dab3921b
1 changed files with 16 additions and 0 deletions
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16
lib/replace/wscript
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@ -313,6 +313,22 @@ def configure(conf):
headers='stdint.h sys/atomic.h',
msg='Checking for atomic_add_32 compiler builtin')
conf.CHECK_CODE('''
uint32_t i,j;
j = __atomic_add_fetch(&i,1,__ATOMIC_SEQ_CST)
''',
'HAVE___ATOMIC_ADD_FETCH',
headers='stdint.h',
msg='Checking for __atomic_add_fetch compiler builtin')
conf.CHECK_CODE('''
uint32_t i,j;
__atomic_load(&i,&j,__ATOMIC_SEQ_CST)
''',
'HAVE___ATOMIC_ADD_LOAD',
headers='stdint.h',
msg='Checking for __atomic_load compiler builtin')
# Check for thread fence. */
tf = conf.CHECK_CODE('atomic_thread_fence(memory_order_seq_cst);',
'HAVE_ATOMIC_THREAD_FENCE',