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| author | theraven <theraven@FreeBSD.org> | 2013-01-11 15:05:55 +0000 |
|---|---|---|
| committer | theraven <theraven@FreeBSD.org> | 2013-01-11 15:05:55 +0000 |
| commit | f8a3c6151f84669a265d291556c626e90b92b208 (patch) | |
| tree | 714345d8e051db9af44b11c7c3f9f9ee2bef18d1 /contrib/libcxxrt/atomic.h | |
| parent | 607c3680d90935ee21ad3e58fdd171d15ebb3284 (diff) | |
| parent | e8f1f5bd311be550e3041d55f84c95d7b5990797 (diff) | |
| download | FreeBSD-src-f8a3c6151f84669a265d291556c626e90b92b208.zip FreeBSD-src-f8a3c6151f84669a265d291556c626e90b92b208.tar.gz | |
Merge new version of libcxxrt. This brings in three fixes:
- Don't treat pointers to members as pointers in catch blocks (they're usually
fat pointers).
- Correctly catch foreign exceptions in catchalls.
- Ensure that a happens-before relationship is established when setting
terminate handlers in one thread and calling them in another.
Diffstat (limited to 'contrib/libcxxrt/atomic.h')
| -rw-r--r-- | contrib/libcxxrt/atomic.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/contrib/libcxxrt/atomic.h b/contrib/libcxxrt/atomic.h new file mode 100644 index 0000000..bcd8a47 --- /dev/null +++ b/contrib/libcxxrt/atomic.h @@ -0,0 +1,29 @@ + +#ifndef __has_builtin +#define __has_builtin(x) 0 +#endif +#ifndef __has_feature +#define __has_feature(x) 0 +#endif +/** + * Swap macro that enforces a happens-before relationship with a corresponding + * ATOMIC_LOAD. + */ +#if __has_feature(cxx_atomic) +#define ATOMIC_SWAP(addr, val)\ + __atomic_exchange(addr, val, __ATOMIC_ACQ_REL) +#elif __has_builtin(__sync_swap) +#define ATOMIC_SWAP(addr, val)\ + __sync_swap(addr, val) +#else +#define ATOMIC_SWAP(addr, val)\ + __sync_lock_test_and_set(addr, val) +#endif + +#if __has_feature(cxx_atomic) +#define ATOMIC_LOAD(addr)\ + __atomic_load(addr, __ATOMIC_ACQUIRE) +#else +#define ATOMIC_LOAD(addr)\ + (__sync_synchronize(), *addr) +#endif |
