56 lines
1.8 KiB
Diff
56 lines
1.8 KiB
Diff
commit 69e9378eb86357d4361322256d5d5a39ff4a592d
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Author: q66 <daniel@octaforge.org>
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Date: Fri Jan 10 13:04:37 2020 +0100
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use __atomic builtins instead of legacy __sync
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This allows for 64-bit atomic ops on platforms that don't natively
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support them such as armv6 and ppc32.
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diff --git atomic/unix/builtins64.c atomic/unix/builtins64.c
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index 4a4b685..90b5c5e 100644
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--- atomic/unix/builtins64.c
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+++ atomic/unix/builtins64.c
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@@ -30,35 +30,34 @@ APR_DECLARE(void) apr_atomic_set64(volatile apr_uint64_t *mem, apr_uint64_t val)
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APR_DECLARE(apr_uint64_t) apr_atomic_add64(volatile apr_uint64_t *mem, apr_uint64_t val)
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{
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- return __sync_fetch_and_add(mem, val);
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+ return __atomic_fetch_add(mem, val, __ATOMIC_SEQ_CST);
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}
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APR_DECLARE(void) apr_atomic_sub64(volatile apr_uint64_t *mem, apr_uint64_t val)
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{
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- __sync_fetch_and_sub(mem, val);
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+ __atomic_fetch_sub(mem, val, __ATOMIC_SEQ_CST);
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}
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APR_DECLARE(apr_uint64_t) apr_atomic_inc64(volatile apr_uint64_t *mem)
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{
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- return __sync_fetch_and_add(mem, 1);
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+ return __atomic_fetch_add(mem, 1, __ATOMIC_SEQ_CST);
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}
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APR_DECLARE(int) apr_atomic_dec64(volatile apr_uint64_t *mem)
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{
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- return __sync_sub_and_fetch(mem, 1);
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+ return (int)__atomic_sub_fetch(mem, 1, __ATOMIC_SEQ_CST);
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}
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APR_DECLARE(apr_uint64_t) apr_atomic_cas64(volatile apr_uint64_t *mem, apr_uint64_t with,
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apr_uint64_t cmp)
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{
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- return __sync_val_compare_and_swap(mem, cmp, with);
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+ __atomic_compare_exchange_n(mem, &cmp, with, 0, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST);
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+ return cmp;
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}
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APR_DECLARE(apr_uint64_t) apr_atomic_xchg64(volatile apr_uint64_t *mem, apr_uint64_t val)
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{
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- __sync_synchronize();
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-
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- return __sync_lock_test_and_set(mem, val);
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+ return __atomic_exchange_n(mem, val, __ATOMIC_SEQ_CST);
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}
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#endif /* USE_ATOMICS_BUILTINS */
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