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zos: use PLO instruction for atomic operations

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Use builtins provided that perform compare and swap operations
using the PLO instruction.

PR-URL: https://github.com/libuv/libuv/pull/1008
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Saúl Ibarra Corretgé <saghul@gmail.com>
This commit is contained in:
John Barboza 2016-08-21 13:53:29 -04:00 committed by Saúl Ibarra Corretgé
parent 0a4b51fcb4
commit 841edfcd40
1 changed files with 6 additions and 7 deletions
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13
src/unix/atomic-ops.h
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@ -43,9 +43,8 @@ UV_UNUSED(static int cmpxchgi(int* ptr, int oldval, int newval)) {
__compare_and_swap(ptr, &oldval, newval);
return out;
#elif defined(__MVS__)
const int out = (*(volatile int*) ptr);
cs((cs_t*)&oldval, (cs_t*)ptr, *(cs_t*)(&newval));
return out;
return __plo_CS(ptr, (unsigned int*) ptr,
oldval, (unsigned int*) &newval);
#else
return __sync_val_compare_and_swap(ptr, oldval, newval);
#endif
@ -68,13 +67,13 @@ UV_UNUSED(static long cmpxchgl(long* ptr, long oldval, long newval)) {
# endif /* if defined(__64BIT__) */
return out;
#elif defined (__MVS__)
const long out = (*(volatile int*) ptr);
# ifdef _LP64
cds((cds_t*)(&oldval), (cds_t*)ptr, *(cds_t*)(&newval));
return __plo_CSGR(ptr, (unsigned long long*) ptr,
oldval, (unsigned long long*) &newval);
# else
cs((cs_t*)&oldval, (cs_t*)ptr, *(cs_t*)(&newval));
return __plo_CS(ptr, (unsigned int*) ptr,
oldval, (unsigned int*) &newval);
# endif
return out;
#else
return __sync_val_compare_and_swap(ptr, oldval, newval);
#endif