<div dir="ltr"> <div class="gmail_extra"> <div class="gmail_quote">On Fri, Feb 6, 2015 at 1:43 PM, Carl Worth <<a href="mailto:cworth@cworth.org" target="_blank">cworth@cworth.org</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">This provides for atomic addition, which will be used by an upcoming shader-cache patch. A simple test is added to "make check" as well. Note: The various O/S functions differ on whether they return the original value or the value after the addition, so I did not provide an add_return() macro which would be sensitive to that difference. --- Note: I referenced the MSDN web pages and some online Solaris man pages to update the relevant sections, (but I have neither compiled nor tested this new macro on those operating systems). I would appreciate any relvant review or reports from testing. src/util/u_atomic.h | 16 ++++++++++++++++ src/util/u_atomic_test.c | 5 +++++ 2 files changed, 21 insertions(+) diff --git a/src/util/u_atomic.h b/src/util/u_atomic.h index cf7fff3..4eb0ec6 100644 --- a/src/util/u_atomic.h +++ b/src/util/u_atomic.h @@ -39,6 +39,7 @@ #define p_atomic_dec_zero(v) (__sync_sub_and_fetch((v), 1) == 0) #define p_atomic_inc(v) (void) __sync_add_and_fetch((v), 1) #define p_atomic_dec(v) (void) __sync_sub_and_fetch((v), 1) +#define p_atomic_add(v, i) (void) __sync_add_and_fetch((v), (i)) #define p_atomic_inc_return(v) __sync_add_and_fetch((v), 1) #define p_atomic_dec_return(v) __sync_sub_and_fetch((v), 1) #define p_atomic_cmpxchg(v, old, _new) \ @@ -60,6 +61,7 @@ #define p_atomic_dec_zero(_v) (p_atomic_dec_return(_v) == 0) #define p_atomic_inc(_v) ((void) p_atomic_inc_return(_v)) #define p_atomic_dec(_v) ((void) p_atomic_dec_return(_v)) +#define p_atomic_add(_v, _i) (*(_v) = *(_v) + (_i)) #define p_atomic_inc_return(_v) (++(*(_v))) #define p_atomic_dec_return(_v) (--(*(_v))) #define p_atomic_cmpxchg(_v, _old, _new) (*(_v) == (_old) ? (*(_v) = (_new), (_old)) : *(_v)) @@ -144,6 +146,13 @@ char _InterlockedCompareExchange8(char volatile *Destination8, char Exchange8, c sizeof *(_v) == sizeof(__int64) ? InterlockedDecrement64 ((__int64 *)(_v)) : \ (assert(!"should not get here"), 0)) +#define p_atomic_add(_v, _i) (\ + sizeof *(_v) == sizeof(short) ? _InterlockedExchangeAdd8 ((char *) (_v), (_i)) : \ </blockquote><div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> + sizeof *(_v) == sizeof(short) ? _InterlockedExchangeAdd16((short *) (_v), (_i)) : \ </blockquote><div> </div><div>Ignore me if this is a stupid question, but should those both be sizeof(short)? I'd expect the first to be sizeof(char). </div><div>--Aaron </div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> + sizeof *(_v) == sizeof(long) ? _InterlockedExchangeAdd ((long *) (_v), (_i)) : \ + sizeof *(_v) == sizeof(__int64) ? _InterlockedExchangeAdd64((__int64 *)(_v), (_i)) : \ + (assert(!"should not get here"), 0)) + #define p_atomic_cmpxchg(_v, _old, _new) (\ sizeof *(_v) == sizeof(char) ? _InterlockedCompareExchange8 ((char *) (_v), (char) (_new), (char) (_old)) : \ sizeof *(_v) == sizeof(short) ? _InterlockedCompareExchange16((short *) (_v), (short) (_new), (short) (_old)) : \ @@ -198,6 +207,13 @@ char _InterlockedCompareExchange8(char volatile *Destination8, char Exchange8, c sizeof(*v) == sizeof(uint64_t) ? atomic_dec_64_nv((uint64_t *)(v)) : \ (assert(!"should not get here"), 0)) +#define p_atomic_add(v, i) ((void) \ + sizeof(*v) == sizeof(uint8_t) ? atomic_add_8 ((uint8_t *)(v), (i)) : \ + sizeof(*v) == sizeof(uint16_t) ? atomic_add_16((uint16_t *)(v), (i)) : \ + sizeof(*v) == sizeof(uint32_t) ? atomic_add_32((uint32_t *)(v), (i)) : \ + sizeof(*v) == sizeof(uint64_t) ? atomic_add_64((uint64_t *)(v), (i)) : \ + (assert(!"should not get here"), 0)) + #define p_atomic_cmpxchg(v, old, _new) ((typeof(*v)) \ sizeof(*v) == sizeof(uint8_t) ? atomic_cas_8 ((uint8_t *)(v), (uint8_t )(old), (uint8_t )(_new)) : \ sizeof(*v) == sizeof(uint16_t) ? atomic_cas_16((uint16_t *)(v), (uint16_t)(old), (uint16_t)(_new)) : \ diff --git a/src/util/u_atomic_test.c b/src/util/u_atomic_test.c index 4845e75..c506275 100644 --- a/src/util/u_atomic_test.c +++ b/src/util/u_atomic_test.c @@ -97,6 +97,11 @@ assert(v == ones && "p_atomic_dec_return"); \ assert(r == v && "p_atomic_dec_return"); \ \ + v = 23; \ + p_atomic_add(&v, 42); \ + r = p_atomic_read(&v); \ + assert(r == 65 && "p_atomic_add"); \ + \ (void) r; \ (void) b; \ } -- 2.1.4 _______________________________________________ mesa-dev mailing list <a href="mailto:mesa-dev@lists.freedesktop.org">mesa-dev@lists.freedesktop.org</a> <a href="http://lists.freedesktop.org/mailman/listinfo/mesa-dev" target="_blank">http://lists.freedesktop.org/mailman/listinfo/mesa-dev</a> </blockquote></div> </div></div>