Patrick Williams | c124f4f | 2015-09-15 14:41:29 -0500 | [diff] [blame] | 1 | Upstream-Status: Backport |
| 2 | |
| 3 | 8/17/2010 - rebased to 1.44 by Qing He <qing.he@intel.com> |
| 4 | |
| 5 | diff --git a/boost/smart_ptr/detail/atomic_count_sync.hpp b/boost/smart_ptr/detail/atomic_count_sync.hpp |
| 6 | index b6359b5..78b1cc2 100644 |
| 7 | --- a/boost/smart_ptr/detail/atomic_count_sync.hpp |
| 8 | +++ b/boost/smart_ptr/detail/atomic_count_sync.hpp |
| 9 | @@ -33,17 +33,46 @@ public: |
| 10 | |
| 11 | long operator++() |
| 12 | { |
| 13 | +#ifdef __ARM_ARCH_7A__ |
| 14 | + int v1, tmp; |
| 15 | + asm volatile ("1: \n\t" |
| 16 | + "ldrex %0, %1 \n\t" |
| 17 | + "add %0 ,%0, #1 \n\t" |
| 18 | + "strex %2, %0, %1 \n\t" |
| 19 | + "cmp %2, #0 \n\t" |
| 20 | + "bne 1b \n\t" |
| 21 | + : "=&r" (v1), "+Q"(value_), "=&r"(tmp) |
| 22 | + ); |
| 23 | +#else |
| 24 | return __sync_add_and_fetch( &value_, 1 ); |
| 25 | +#endif |
| 26 | } |
| 27 | |
| 28 | long operator--() |
| 29 | { |
| 30 | +#ifdef __ARM_ARCH_7A__ |
| 31 | + int v1, tmp; |
| 32 | + asm volatile ("1: \n\t" |
| 33 | + "ldrex %0, %1 \n\t" |
| 34 | + "sub %0 ,%0, #1 \n\t" |
| 35 | + "strex %2, %0, %1 \n\t" |
| 36 | + "cmp %2, #0 \n\t" |
| 37 | + "bne 1b \n\t" |
| 38 | + : "=&r" (v1), "+Q"(value_), "=&r"(tmp) |
| 39 | + ); |
| 40 | + return value_; |
| 41 | +#else |
| 42 | return __sync_add_and_fetch( &value_, -1 ); |
| 43 | +#endif |
| 44 | } |
| 45 | |
| 46 | operator long() const |
| 47 | { |
| 48 | +#if __ARM_ARCH_7A__ |
| 49 | + return value_; |
| 50 | +#else |
| 51 | return __sync_fetch_and_add( &value_, 0 ); |
| 52 | +#endif |
| 53 | } |
| 54 | |
| 55 | private: |