cfed068c1d
Compiler built-ins used, where possible. Necessary configure checks added.
New macros:
nxt_atomic_or_fetch(ptr, val)
nxt_atomic_and_fetch(ptr, val)
Syntax and behaviour is similar to __sync_or_and_fetch and __sync_and_and_fetch
GCC build-ins.
122 lines
3.8 KiB
Text
122 lines
3.8 KiB
Text
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# Copyright (C) Igor Sysoev
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# Copyright (C) NGINX, Inc.
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# GCC 4.1+ builtin atomic operations.
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nxt_feature="GCC builtin atomic operations"
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nxt_feature_name=NXT_HAVE_GCC_ATOMIC
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nxt_feature_run=yes
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nxt_feature_incs=
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nxt_feature_libs=
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nxt_feature_test="int main() {
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long n = 0;
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if (!__sync_bool_compare_and_swap(&n, 0, 3))
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return 1;
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if (__sync_fetch_and_add(&n, 1) != 3)
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return 1;
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if (__sync_lock_test_and_set(&n, 5) != 4)
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return 1;
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if (n != 5)
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return 1;
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if (__sync_or_and_fetch(&n, 2) != 7)
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return 1;
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if (__sync_and_and_fetch(&n, 5) != 5)
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return 1;
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__sync_lock_release(&n);
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if (n != 0)
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return 1;
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return 0;
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}"
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. auto/feature
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# Solaris 10 builtin atomic operations.
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if [ $nxt_found = no ]; then
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nxt_feature="Solaris builtin atomic operations"
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nxt_feature_name=NXT_HAVE_SOLARIS_ATOMIC
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nxt_feature_run=yes
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nxt_feature_incs=
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nxt_feature_libs=
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nxt_feature_test="#include <atomic.h>
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int main() {
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ulong_t n = 0;
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if (atomic_cas_ulong(&n, 0, 3) != 0)
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return 1;
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if (atomic_add_long_nv(&n, 1) != 4)
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return 1;
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if (atomic_swap_ulong(&n, 5) != 4)
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return 1;
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if (n != 5)
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return 1;
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if (atomic_or_ulong_nv(&n, 2) != 7)
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return 1;
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if (atomic_and_ulong_nv(&n, 5) != 5)
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return 1;
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return 0;
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}"
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. auto/feature
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fi
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# AIX xlC builtin atomic operations.
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if [ $nxt_found = no ]; then
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if [ $NXT_64BIT = 1 ]; then
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nxt_feature_test="int main() {
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long n = 0;
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long o = 0;
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if (!__compare_and_swaplp(&n, &o, 3))
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return 1;
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if (__fetch_and_addlp(&n, 1) != 3)
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return 1;
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if (__fetch_and_swaplp(&n, 5) != 4)
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return 1;
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if (n != 5)
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return 1;
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__isync();
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__lwsync();
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return 0;
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}"
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else
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nxt_feature_test="int main() {
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int n = 0;
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int o = 0;
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if (!__compare_and_swap(&n, &o, 3))
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return 1;
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if (__fetch_and_add(&n, 1) != 3)
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return 1;
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if (__fetch_and_swap(&n, 5) != 4)
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return 1;
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if (n != 5)
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return 1;
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__isync();
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__lwsync();
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return 0;
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}"
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fi
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nxt_feature="xlC builtin atomic operations"
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nxt_feature_name=NXT_HAVE_XLC_ATOMIC
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nxt_feature_run=yes
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nxt_feature_incs=
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nxt_feature_libs=
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. auto/feature
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fi
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if [ $nxt_found = no ]; then
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$echo
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$echo $0: error: no atomic operations found.
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$echo
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exit 1;
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fi
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