Some of these changes (e.g. use of GCC __atomic builtins) are in preparation
for the appearance of odp_atomic_internal.h but these patches can be merged
separately.
odp_atomic.h:
Use struct for 32- and 64-bit atomic types, this prevents non-atomic access
to atomic variables and enables additional fields as possibly required by
some implementations.
Use GCC __atomic builtins with relaxed memory model (previously __sync
builtins).
Made some 64-bit operations (e.g. load, store) atomic on 32-bit architectures.
Emulated 64-bit atomic support for functionally challenged 32-bit architectures
(e.g. PPC32).
Relaxed memory model for atomic operations, this enhances performance on
weakly ordered architectures (e.g. most RISC).
Added missing atomic_add_u32, atomic_sub_u32 and atomic_sub_64 operations.
Removed 32- and 64-bit cmpset operations (to be reintroduced in
odp_atomic_intermal.h).
odp_generator.c:
Updated to use odp_atomic.h operations with atomic types.
odp_barrier.h:
Minor function signature change (int -> uint32_t).
odp_spin_internal.h:
Removed odp_mem_barrier() which is a compiler only barrier and basically
useless and dangerous on all weakly ordered architectures. It was only used
by odp_ring.c.
odp_barrier.c:
Updated to use odp_atomic.h typese and functions. Fixed broken (non-atomic)
wrap-around of 'bar'.
odp_buffer.c:
Updated to use odp_atomic.h functions (ref_count).
odp_ring.c:
Added missing release barriers. Updated to use GCC __atomic cmpset facility
(tmp fix).
odp_rwlock.c:
Updated to use odp_atomic.h. Updated to use GCC __atomic facilities (tmp
fix).
odp_ticketlock.c:
Updated to use odp_atomic.h. Updated to use GCC __atomic facilities (tmp
fix). Fixed missing barrier in ticketlock_lock().
odp_atomic_test.c:
Update to conform to latest odp_atomic.h syntax. Added usage of odp_barrier_t
instead of home grown thread barrier.
Ola Liljedahl (7):
api: odp_atomic.h: use struct type, relaxed implem, missing funcs
api: odp_barrier.h: signature change, use odp_atomic.h, atomic
wrap-around fix
linux-generic: odp_ring.c: use __atomic cmpset, added missing
barriers, removed dangerous odp_mem_barrier
linux-generic: odp_ticketlock.c: use odp_atomic.h and __atomic (tmp),
added missing barrier
linux-generic: odp_rwlock.c: use odp_atomic.h and GCC __atomic (tmp)
linux-generic: odp_buffer.c: use odp_atomic.h
example: odp_generator.c: use odp_atomic.h
example/generator/odp_generator.c | 28 ++-
platform/linux-generic/include/api/odp_atomic.h | 269 +++++++++++++--------
platform/linux-generic/include/api/odp_barrier.h | 2 +-
platform/linux-generic/include/odp_spin_internal.h | 9 -
platform/linux-generic/odp_barrier.c | 17 +-
platform/linux-generic/odp_buffer.c | 3 +-
platform/linux-generic/odp_ring.c | 28 ++-
platform/linux-generic/odp_rwlock.c | 24 +-
platform/linux-generic/odp_ticketlock.c | 12 +-
test/api_test/odp_atomic_test.c | 31 +--
10 files changed, 253 insertions(+), 170 deletions(-)
--
1.9.1
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