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| author | Tommi Rantala <tt.rantala@gmail.com> | 2012-09-19 14:00:20 +0300 |
|---|---|---|
| committer | Tommi Rantala <tt.rantala@gmail.com> | 2012-09-28 13:52:22 +0300 |
| commit | 9a3565ddc1e956ef1f52806093e949c7809f6e79 (patch) | |
| tree | 083806a7ef8c213db6f9a8cbf292f24e33c17b27 /include | |
| parent | 26fc1563fba945d0356e4a7dd935a6a57b3c03db (diff) | |
| download | libunwind-9a3565ddc1e956ef1f52806093e949c7809f6e79.tar.gz | |
Simplify `sos_alloc()' implementation
Instead of maintaining a pointer to the `sos_memory' array, maintain an
index that tells the next free position. When atomic operations are
available, the allocation boils down to a single fetch-and-add
operation.
Diffstat (limited to 'include')
| -rw-r--r-- | include/libunwind_i.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/include/libunwind_i.h b/include/libunwind_i.h index b1f9cee5..15a79735 100644 --- a/include/libunwind_i.h +++ b/include/libunwind_i.h @@ -110,11 +110,12 @@ cmpxchg_ptr (void *addr, void *old, void *new) return AO_compare_and_swap(u.aop, (AO_t) old, (AO_t) new); } # define fetch_and_add1(_ptr) AO_fetch_and_add1(_ptr) +# define fetch_and_add(_ptr, value) AO_fetch_and_add(_ptr, value) /* GCC 3.2.0 on HP-UX crashes on cmpxchg_ptr() */ # if !(defined(__hpux) && __GNUC__ == 3 && __GNUC_MINOR__ == 2) # define HAVE_CMPXCHG # endif -# define HAVE_FETCH_AND_ADD1 +# define HAVE_FETCH_AND_ADD #else # ifdef HAVE_IA64INTRIN_H # include <ia64intrin.h> @@ -132,8 +133,9 @@ cmpxchg_ptr (void *addr, void *old, void *new) return __sync_bool_compare_and_swap(u.vlp, (long) old, (long) new); } # define fetch_and_add1(_ptr) __sync_fetch_and_add(_ptr, 1) +# define fetch_and_add(_ptr, value) __sync_fetch_and_add(_ptr, value) # define HAVE_CMPXCHG -# define HAVE_FETCH_AND_ADD1 +# define HAVE_FETCH_AND_ADD # endif #endif #define atomic_read(ptr) (*(ptr)) |