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| author | Max Romanov <max.romanov@nginx.com> | 2017-04-21 16:55:13 +0300 |
|---|---|---|
| committer | Max Romanov <max.romanov@nginx.com> | 2017-04-21 16:55:13 +0300 |
| commit | cfed068c1d81d0ad0fe58885a0120529aa49630a (patch) | |
| tree | d1d9c6f31341f13cac6bd60eda16f146512f4c2e | |
| parent | 6e7f98d6aed3047562656f86a5f9474d94d1894b (diff) | |
| download | unit-cfed068c1d81d0ad0fe58885a0120529aa49630a.tar.gz unit-cfed068c1d81d0ad0fe58885a0120529aa49630a.tar.bz2 | |
Macros for atomic 'OR' and 'AND' operations introduced.
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.
| -rw-r--r-- | auto/atomic | 8 | ||||
| -rw-r--r-- | src/nxt_atomic.h | 17 |
2 files changed, 25 insertions, 0 deletions
diff --git a/auto/atomic b/auto/atomic index 6535bf74..31259fc5 100644 --- a/auto/atomic +++ b/auto/atomic @@ -21,6 +21,10 @@ nxt_feature_test="int main() { return 1; if (n != 5) return 1; + if (__sync_or_and_fetch(&n, 2) != 7) + return 1; + if (__sync_and_and_fetch(&n, 5) != 5) + return 1; __sync_lock_release(&n); if (n != 0) return 1; @@ -51,6 +55,10 @@ if [ $nxt_found = no ]; then return 1; if (n != 5) return 1; + if (atomic_or_ulong_nv(&n, 2) != 7) + return 1; + if (atomic_and_ulong_nv(&n, 5) != 5) + return 1; return 0; }" . auto/feature diff --git a/src/nxt_atomic.h b/src/nxt_atomic.h index b3a1e95a..9e2e5ec1 100644 --- a/src/nxt_atomic.h +++ b/src/nxt_atomic.h @@ -51,6 +51,14 @@ nxt_atomic_release(lock) \ __sync_lock_release(lock) +#define nxt_atomic_or_fetch(ptr, val) \ + __sync_or_and_fetch(ptr, val) + + +#define nxt_atomic_and_fetch(ptr, val) \ + __sync_and_and_fetch(ptr, val) + + #if (__i386__ || __i386 || __amd64__ || __amd64) #define \ nxt_cpu_pause() \ @@ -85,6 +93,15 @@ nxt_atomic_xchg(lock, set) \ nxt_atomic_fetch_add(value, add) \ (atomic_add_long_nv(value, add) - add) + +#define nxt_atomic_or_fetch(ptr, val) \ + atomic_or_ulong_nv(ptr, val) + + +#define nxt_atomic_and_fetch(ptr, val) \ + atomic_and_ulong_nv(ptr, val) + + /* * Solaris uses SPARC Total Store Order model. In this model: * 1) Each atomic load-store instruction behaves as if it were followed by |