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unix: remove unused cmpxchgl() function

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PR-URL: https://github.com/libuv/libuv/pull/2230
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Saúl Ibarra Corretgé <saghul@gmail.com>
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>
This commit is contained in:
Ben Noordhuis 2019-03-26 01:32:12 +01:00 committed by cjihrig
parent 0da05ce652
commit 280f7b2496
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GPG Key ID: 7434390BDBE9B9C5
1 changed files with 0 additions and 37 deletions
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37
src/unix/atomic-ops.h
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@ -23,7 +23,6 @@
#endif
UV_UNUSED(static int cmpxchgi(int* ptr, int oldval, int newval));
UV_UNUSED(static long cmpxchgl(long* ptr, long oldval, long newval));
UV_UNUSED(static void cpu_relax(void));
/* Prefer hand-rolled assembly over the gcc builtins because the latter also
@ -55,42 +54,6 @@ UV_UNUSED(static int cmpxchgi(int* ptr, int oldval, int newval)) {
#endif
}
UV_UNUSED(static long cmpxchgl(long* ptr, long oldval, long newval)) {
#if defined(__i386__) || defined(__x86_64__)
long out;
__asm__ __volatile__ ("lock; cmpxchg %2, %1;"
: "=a" (out), "+m" (*(volatile long*) ptr)
: "r" (newval), "0" (oldval)
: "memory");
return out;
#elif defined(_AIX) && defined(__xlC__)
const long out = (*(volatile int*) ptr);
# if defined(__64BIT__)
__compare_and_swaplp(ptr, &oldval, newval);
# else
__compare_and_swap(ptr, &oldval, newval);
# endif /* if defined(__64BIT__) */
return out;
#elif defined (__MVS__)
#ifdef _LP64
unsigned long long op4;
if (__plo_CSSTGR(ptr, (unsigned long long*) &oldval, newval,
(unsigned long long*) ptr, *ptr, &op4))
#else
unsigned long op4;
if (__plo_CSST(ptr, (unsigned int*) &oldval, newval,
(unsigned int*) ptr, *ptr, &op4))
#endif
return oldval;
else
return op4;
#elif defined(__SUNPRO_C) || defined(__SUNPRO_CC)
return atomic_cas_ulong((ulong_t *)ptr, (ulong_t)oldval, (ulong_t)newval);
#else
return __sync_val_compare_and_swap(ptr, oldval, newval);
#endif
}
UV_UNUSED(static void cpu_relax(void)) {
#if defined(__i386__) || defined(__x86_64__)
__asm__ __volatile__ ("rep; nop"); /* a.k.a. PAUSE */