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|
# ast atomic scalar operations feature tests
if aso note{ gcc 4.1+ 64 bit memory atomic operations model }end link{
#include "FEATURE/common"
int main()
{
uint64_t i = 0;
return __sync_fetch_and_add(&i,7);
}
}end && {
#define _aso_cas8(p,o,n) __sync_val_compare_and_swap(p,o,n)
#define _aso_inc8(p) __sync_fetch_and_add(p,1)
#define _aso_dec8(p) __sync_fetch_and_sub(p,1)
#define _aso_cas16(p,o,n) __sync_val_compare_and_swap(p,o,n)
#define _aso_inc16(p) __sync_fetch_and_add(p,1)
#define _aso_dec16(p) __sync_fetch_and_sub(p,1)
#define _aso_cas32(p,o,n) __sync_val_compare_and_swap(p,o,n)
#define _aso_inc32(p) __sync_fetch_and_add(p,1)
#define _aso_dec32(p) __sync_fetch_and_sub(p,1)
#define _aso_cas64(p,o,n) __sync_val_compare_and_swap(p,o,n)
#define _aso_inc64(p) __sync_fetch_and_add(p,1)
#define _aso_dec64(p) __sync_fetch_and_sub(p,1)
#if _ast_sizeof_pointer == 8
#define _aso_casptr(p,o,n) ((void*)__sync_val_compare_and_swap(p,(uint64_t)o,(uint64_t)n))
#else
#define _aso_casptr(p,o,n) ((void*)__sync_val_compare_and_swap(p,(uint32_t)o,(uint32_t)n))
#endif
}
elif aso note{ gcc 4.1+ 32 bit memory atomic operations model }end link{
#include "FEATURE/common"
int main()
{
uint32_t i = 0;
return __sync_fetch_and_add(&i,7);
}
}end && {
#define _aso_cas8(p,o,n) __sync_val_compare_and_swap(p,o,n)
#define _aso_inc8(p) __sync_fetch_and_add(p,1)
#define _aso_dec8(p) __sync_fetch_and_sub(p,1)
#define _aso_cas16(p,o,n) __sync_val_compare_and_swap(p,o,n)
#define _aso_inc16(p) __sync_fetch_and_add(p,1)
#define _aso_dec16(p) __sync_fetch_and_sub(p,1)
#define _aso_cas32(p,o,n) __sync_val_compare_and_swap(p,o,n)
#define _aso_inc32(p) __sync_fetch_and_add(p,1)
#define _aso_dec32(p) __sync_fetch_and_sub(p,1)
#define _aso_casptr(p,o,n) ((void*)__sync_val_compare_and_swap(p,(uint32_t)o,(uint32_t)n))
}
elif aso note{ <atomic.h> atomic_cas_64 }end link{
#include "FEATURE/common"
#include <atomic.h>
int main()
{
uint64_t i = 0;
uint32_t j = 1;
return atomic_cas_64(&i, 0, 1) != 0 || atomic_add_32_nv(&j, 1) != 1;
}
}end && {
#include <atomic.h>
#define _aso_cas8(p,o,n) atomic_cas_8(p,o,n)
#define _aso_inc8(p) (atomic_add_8_nv(p,1)-1)
#define _aso_dec8(p) (atomic_add_8_nv(p,-1)+1)
#define _aso_cas16(p,o,n) atomic_cas_16(p,o,n)
#define _aso_inc16(p) (atomic_add_16_nv(p,1)-1)
#define _aso_dec16(p) (atomic_add_16_nv(p,-1)+1)
#define _aso_cas32(p,o,n) atomic_cas_32(p,o,n)
#define _aso_inc32(p) (atomic_add_32_nv(p,1)-1)
#define _aso_dec32(p) (atomic_add_32_nv(p,-1)+1)
#define _aso_cas64(p,o,n) atomic_cas_64(p,o,n)
#define _aso_inc64(p) (atomic_add_64_nv(p,1)-1)
#define _aso_dec64(p) (atomic_add_64_nv(p,-1)+1)
#if _ast_sizeof_pointer == 8
#define _aso_casptr(p,o,n) ((void*)atomic_cas_64((uint64_t*)p,(uint64_t)o,(uint64_t)n))
#else
#define _aso_casptr(p,o,n) ((void*)atomic_cas_32((uint32_t*)p,(uint32_t)o,(uint32_t)n))
#endif
}
elif aso note{ <atomic.h> atomic_cas_32 }end link{
#include "FEATURE/common"
#include <atomic.h>
int main()
{
uint32_t i = 0;
return atomic_cas_32(&i, 0, 1) != 0 || (atomic_add_32_nv(&i, 1) - 1) != 1;
}
}end && {
#include <atomic.h>
#define _aso_cas8(p,o,n) atomic_cas_8(p,o,n)
#define _aso_inc8(p) (atomic_add_8_nv(p,1)-1)
#define _aso_dec8(p) (atomic_add_8_nv(p,-1)+1)
#define _aso_cas16(p,o,n) atomic_cas_16(p,o,n)
#define _aso_inc16(p) (atomic_add_16_nv(p,1)-1)
#define _aso_dec16(p) (atomic_add_16_nv(p,-1)+1)
#define _aso_cas32(p,o,n) atomic_cas_32(p,o,n)
#define _aso_inc32(p) (atomic_add_32_nv(p,1)-1)
#define _aso_dec32(p) (atomic_add_32_nv(p,-1)+1)
#define _aso_casptr(p,o,n) ((void*)atomic_cas_32((uint32_t*)p,(uint32_t)o,(uint32_t)n))
}
elif aso -latomic note{ <atomic.h> atomic_cas_64 with -latomic }end link{
#include "FEATURE/common"
#include <atomic.h>
int main()
{
uint64_t i = 0;
uint32_t j = 1;
return atomic_cas_64(&i, 0, 1) != 0 || (atomic_add_32_nv(&j, 1) - 1) != 1;
}
}end && {
#include <atomic.h>
#define _REQ_atomic
#define _aso_cas8(p,o,n) atomic_cas_8(p,o,n)
#define _aso_inc8(p) (atomic_add_8_nv(p,1)-1)
#define _aso_dec8(p) (atomic_add_8_nv(p,-1)+1)
#define _aso_cas16(p,o,n) atomic_cas_16(p,o,n)
#define _aso_inc16(p) (atomic_add_16_nv(p,1)-1)
#define _aso_dec16(p) (atomic_add_16_nv(p,-1)+1)
#define _aso_cas32(p,o,n) atomic_cas_32(p,o,n)
#define _aso_inc32(p) (atomic_add_32_nv(p,1)-1)
#define _aso_dec32(p) (atomic_add_32_nv(p,-1)+1)
#define _aso_cas64(p,o,n) atomic_cas_64(p,o,n)
#define _aso_inc64(p) (atomic_add_64_nv(p,1)-1)
#define _aso_dec64(p) (atomic_add_64_nv(p,-1)+1)
#if _ast_sizeof_pointer == 8
#define _aso_casptr(p,o,n) ((void*)atomic_cas_64((uint64_t*)p,(uint64_t)o,(uint64_t)n))
#else
#define _aso_casptr(p,o,n) ((void*)atomic_cas_32((uint32_t*)p,(uint32_t)o,(uint32_t)n))
#endif
}
elif aso note{ <atomic.h> atomic_cas_32 with -latomic }end link{
#include "FEATURE/common"
#include <atomic.h>
int main()
{
uint32_t i = 0;
return atomic_cas_32(&i, 0, 1) != 0 || (atomic_add_32_nv(&i, 1) - 1) != 1;
}
}end && {
#include <atomic.h>
#define _REQ_atomic
#define _aso_cas8(p,o,n) atomic_cas_8(p,o,n)
#define _aso_inc8(p) (atomic_add_8_nv(p,1)-1)
#define _aso_dec8(p) (atomic_add_8_nv(p,-1)+1)
#define _aso_cas16(p,o,n) atomic_cas_16(p,o,n)
#define _aso_inc16(p) (atomic_add_16_nv(p,1)-1)
#define _aso_dec16(p) (atomic_add_16_nv(p,-1)+1)
#define _aso_cas32(p,o,n) atomic_cas_32(p,o,n)
#define _aso_inc32(p) (atomic_add_32_nv(p,1)-1)
#define _aso_dec32(p) (atomic_add_32_nv(p,-1)+1)
#define _aso_casptr(p,o,n) ((void*)atomic_cas_32((uint32_t*)p,(uint32_t)o,(uint32_t)n))
}
elif aso note{ <atomic.h> cas64 }end link{
#include "FEATURE/common"
#include <atomic.h>
int main()
{
uint64_t i = 0;
uint32_t j = 1;
return cas64(&i, 0, 1) != 0 || (atomic_add_32_nv(&j, 1) - 1) != 1;
}
}end && {
#include <atomic.h>
#define _aso_cas8(p,o,n) cas8(p,o,n)
#define _aso_inc8(p) (atomic_add_8_nv(p,1)-1)
#define _aso_dec8(p) (atomic_add_8_nv(p,-1)+1)
#define _aso_cas16(p,o,n) cas16(p,o,n)
#define _aso_inc16(p) (atomic_add_16_nv(p,1)-1)
#define _aso_dec16(p) (atomic_add_16_nv(p,-1)+1)
#define _aso_cas32(p,o,n) cas32(p,o,n)
#define _aso_inc32(p) (atomic_add_32_nv(p,1)-1)
#define _aso_dec32(p) (atomic_add_32_nv(p,-1)+1)
#define _aso_cas64(p,o,n) cas64(p,o,n)
#define _aso_inc64(p) (atomic_add_64_nv(p,1)-1)
#define _aso_dec64(p) (atomic_add_64_nv(p,-1)+1)
#if _ast_sizeof_pointer == 8
#define _aso_casptr(p,o,n) ((void*)cas64((uint64_t*)p,(uint64_t)o,(uint64_t)n))
#else
#define _aso_casptr(p,o,n) ((void*)cas32((uint32_t*)p,(uint32_t)o,(uint32_t)n))
#endif
}
elif aso note{ <atomic.h> just cas64 }end link{
#include "FEATURE/common"
#include <atomic.h>
int main()
{
uint64_t i = 0;
uint32_t j = 1;
uint16_t k = 1;
uint8_t l = 1;
return cas64(&i, 0, 1) != 0 || cas32(&j, 0, 1) != 0 || cas16(&k, 0, 1) != 0 || cas8(&l, 0, 1) != 0;
}
}end && {
#include <atomic.h>
#define _aso_cas8(p,o,n) cas8(p,o,n)
#define _aso_cas16(p,o,n) cas16(p,o,n)
#define _aso_cas32(p,o,n) cas32(p,o,n)
#define _aso_cas64(p,o,n) cas64(p,o,n)
#if _ast_sizeof_pointer == 8
#define _aso_casptr(p,o,n) ((void*)cas64((uint64_t*)p,(uint64_t)o,(uint64_t)n))
#else
#define _aso_casptr(p,o,n) ((void*)cas32((uint32_t*)p,(uint32_t)o,(uint32_t)n))
#endif
}
elif aso note{ <atomic.h> cas32 }end link{
#include "FEATURE/common"
#include <atomic.h>
int main()
{
uint32_t i = 0;
return cas32(&i, 0, 1) != 0 || (atomic_add_32_nv(&i, 1) - 1) != 1;
}
}end && {
#include <atomic.h>
#define _aso_cas8(p,o,n) cas8(p,o,n)
#define _aso_inc8(p) (atomic_add_8_nv(p,1)-1)
#define _aso_dec8(p) (atomic_add_8_nv(p,-1)+1)
#define _aso_cas16(p,o,n) cas16(p,o,n)
#define _aso_inc16(p) (atomic_add_16_nv(p,1)-1)
#define _aso_dec16(p) (atomic_add_16_nv(p,-1)+1)
#define _aso_cas32(p,o,n) cas32(p,o,n)
#define _aso_inc32(p) (atomic_add_32_nv(p,1)-1)
#define _aso_dec32(p) (atomic_add_32_nv(p,-1)+1)
#define _aso_casptr(p,o,n) ((void*)cas32((uint32_t*)p,(uint32_t)o,(uint32_t)n))
}
elif aso note{ <atomic.h> just cas32 }end link{
#include "FEATURE/common"
#include <atomic.h>
int main()
{
uint32_t j = 1;
uint16_t k = 1;
uint8_t l = 1;
return cas32(&j, 0, 1) != 0 || cas16(&k, 0, 1) != 0 || cas8(&l, 0, 1) != 0;
}
}end && {
#include <atomic.h>
#define _aso_cas8(p,o,n) cas8(p,o,n)
#define _aso_cas16(p,o,n) cas16(p,o,n)
#define _aso_cas32(p,o,n) cas32(p,o,n)
#define _aso_casptr(p,o,n) ((void*)cas32((uint32_t*)p,(uint32_t)o,(uint32_t)n))
}
elif aso note{ winix Interlocked }end link{
#include <windows.h>
int main()
{
LONG i = 0;
LONGLONG j = 0;
return InterlockedCompareExchange(&i, 1, 0) != 0 ||
InterlockedIncrement(&i) != 1 ||
InterlockedDecrement(&i) != 2;
}
}end && {
#include <ast_windows.h>
#define _aso_cas32(p,o,n) InterlockedCompareExchange((LONG volatile*)p,n,o)
#define _aso_inc32(p) (InterlockedIncrement((LONG volatile*)p)-1)
#define _aso_dec32(p) (InterlockedDecrement((LONG volatile*)p)+1)
#if _X64
#define _aso_cas64(p,o,n) InterlockedCompareExchange64((LONGLONG volatile*)p,n,o)
#define _aso_inc64(p) (InterlockedIncrement64((LONGLONG volatile*)p)-1)
#define _aso_dec64(p) (InterlockedDecrement64((LONGLONG volatile*)p)+1)
#define _aso_casptr(p,o,n) ((void*)InterlockedCompareExchange64((LONGLONG volatile*)p,(LONGLONG)n,(LONGLONG)o))
#else
#if _BLD_posix
#include "dl.h"
typedef struct LL_s
{
LONG a;
LONG b;
} LL_t;
typedef union
{
LONGLONG i;
LL_t ll;
} LL_u;
#define _aso_cas64(p,o,n) _aso_InterlockedCompareExchange64((LONGLONG volatile*)p,n,o)
static LONGLONG _aso_InterlockedCompareExchange64_init(LONGLONG volatile*, LONGLONG, LONGLONG);
typedef LONGLONG (*_aso_InterlockedCompareExchange64_f)(LONGLONG volatile*, LONGLONG, LONGLONG);
static _aso_InterlockedCompareExchange64_f _aso_InterlockedCompareExchange64 = _aso_InterlockedCompareExchange64_init;
static LONGLONG _aso_InterlockedCompareExchange64_32(LONGLONG volatile* p, LONGLONG o, LONGLONG n)
{
LL_t* lp = (LL_t*)p;
LL_t* op = (LL_t*)&o;
LL_t* np = (LL_t*)&n;
LONGLONG r;
r = *p;
if (_aso_cas32(&lp->a, op->a, np->a) == op->a)
{
if (_aso_cas32(&lp->b, op->b, np->b) == op->b)
return o;
_aso_cas32(&lp->a, np->a, op->a);
}
return r;
}
static LONGLONG _aso_InterlockedCompareExchange64_init(LONGLONG volatile* p, LONGLONG o, LONGLONG n)
{
if (!(_aso_InterlockedCompareExchange64 = (_aso_InterlockedCompareExchange64_f)getsymbol(MODULE_kernel, "InterlockedCompareExchange64")))
_aso_InterlockedCompareExchange64 = _aso_InterlockedCompareExchange64_32;
return _aso_InterlockedCompareExchange64(p, o, n);
}
#define _aso_inc64(p) (_aso_InterlockedIncrement64((LONGLONG volatile*)p)-1)
typedef LONGLONG (*_aso_InterlockedIncrement64_f)(LONGLONG volatile*);
static LONGLONG _aso_InterlockedIncrement64_init(LONGLONG volatile*);
static _aso_InterlockedIncrement64_f _aso_InterlockedIncrement64 = _aso_InterlockedIncrement64_init;
static LONGLONG _aso_InterlockedIncrement64_32(LONGLONG volatile* p)
{
LONGLONG o;
do
{
o = *p;
} while (_aso_InterlockedCompareExchange64_32(p, o, o + 1) != o);
return o;
}
static LONGLONG _aso_InterlockedIncrement64_init(LONGLONG volatile* p)
{
if (!(_aso_InterlockedIncrement64 = (_aso_InterlockedIncrement64_f)getsymbol(MODULE_kernel, "InterlockedIncrement64")))
_aso_InterlockedIncrement64 = _aso_InterlockedIncrement64_32;
return _aso_InterlockedIncrement64(p);
}
#define _aso_dec64(p) (_aso_InterlockedDecrement64((LONGLONG volatile*)p)+1)
typedef LONGLONG (*_aso_InterlockedDecrement64_f)(LONGLONG volatile*);
static LONGLONG _aso_InterlockedDecrement64_init(LONGLONG volatile*);
static _aso_InterlockedDecrement64_f _aso_InterlockedDecrement64 = _aso_InterlockedDecrement64_init;
static LONGLONG _aso_InterlockedDecrement64_32(LONGLONG volatile* p)
{
LONGLONG o;
do
{
o = *p;
} while (_aso_InterlockedCompareExchange64_32(p, o, o - 1) != o);
return o;
}
static LONGLONG _aso_InterlockedDecrement64_init(LONGLONG volatile* p)
{
if (!(_aso_InterlockedDecrement64 = (_aso_InterlockedDecrement64_f)getsymbol(MODULE_kernel, "InterlockedDecrement64")))
_aso_InterlockedDecrement64 = _aso_InterlockedDecrement64_32;
return _aso_InterlockedDecrement64(p);
}
#endif
#define _aso_casptr(p,o,n) ((void*)InterlockedCompareExchange((LONG volatile*)p,(LONG)n,(LONG)o))
#endif
}
elif aso note{ aix fetch and add }end link{
#include <sys/atomic_op.h>
int main()
{
int i = 0;
return fetch_and_add((atomic_p)&i,1);
}
}end && {
#include <sys/atomic_op.h>
#define _aso_incint(p) fetch_and_add((atomic_p)p,1)
#define _aso_decint(p) fetch_and_add((atomic_p)p,-1)
#define _aso_casint(p,o,n) (compare_and_swap((atomic_p)p,(int*)&o,(int)n) ? o : *p)
#if _ast_sizeof_pointer == 8
#define _aso_casptr(p,o,n) (compare_and_swaplp((atomic_l)p,(long*)&o,(long)n) ? o : *(void**)p)
#else
#define _aso_casptr(p,o,n) (compare_and_swap((atomic_p)p,(int*)&o,(int)n) ? o : *(void**)p)
#endif
}
elif aso note{ mips compare and swap }end link{
int main()
{
int i = 1;
return __compare_and_swap(&i, 0, 1) != 1;
}
}end && {
#define _aso_cas32(p,o,n) (__compare_and_swap(p,o,n) ? o : *p)
#define _aso_casptr(p,o,n) (__compare_and_swap((long*)p,(long)o,(long)n) ? o : *(void**)p)
}
elif aso note{ i386|i386-64 asm compare and swap }end link{
#include "FEATURE/common"
static uint32_t
cas32(uint32_t volatile* p, uint32_t o, uint32_t n)
{
uint32_t r;
__asm__ __volatile__ (
"lock ; cmpxchg %3,%4"
: "=a"(r), "=m"(*p)
: "0"(o), "q"(n), "m"(*p)
: "memory", "cc"
);
return r;
}
#if _ast_sizeof_pointer == 8
static uint64_t
cas64(uint64_t volatile* p, uint64_t o, uint64_t n)
{
uint64_t r;
__asm__ __volatile__ (
"lock ; cmpxchg %3,%4"
: "=a"(r), "=m"(*p)
: "0"(o), "q"(n), "m"(*p)
: "memory", "cc"
);
return r;
}
#else
#define cas64(p,o,n) (*(p))
#endif
int main()
{
uint32_t i = 0;
uint64_t j = 0;
return cas32(&i, 0, 1) || cas64(&j, 0, 1);
}
}end && {
static uint32_t
cas32(uint32_t volatile* p, uint32_t o, uint32_t n)
{
uint32_t r;
__asm__ __volatile__ (
"lock ; cmpxchg %3,%4"
: "=a"(r), "=m"(*p)
: "0"(o), "q"(n), "m"(*p)
: "memory", "cc"
);
return r;
}
#if _ast_sizeof_pointer == 8
static uint64_t
cas64(uint64_t volatile* p, uint64_t o, uint64_t n)
{
uint64_t r;
__asm__ __volatile__ (
"lock ; cmpxchg %3,%4"
: "=a"(r), "=m"(*p)
: "0"(o), "q"(n), "m"(*p)
: "memory", "cc"
);
return r;
}
#endif
#define _aso_cas32(p,o,n) cas32(p,o,n)
#if _ast_sizeof_pointer == 8
#define _aso_cas64(p,o,n) cas64(p,o,n)
#define _aso_casptr(p,o,n) ((void*)cas64((uint64_t*)p,(uint64_t)o,(uint64_t)n))
#else
#define _aso_casptr(p,o,n) ((void*)cas32((uint32_t*)p,(uint32_t)o,(uint32_t)n))
#endif
}
elif aso note{ ia64 asm compare and swap }end link{
#include "FEATURE/common"
static uint32_t
cas32(uint32_t volatile* p, uint32_t o, uint32_t n)
{
uint32_t r;
__asm__ __volatile__ (
"zxt4 %3=%3 ;; mov ar.ccv=%3 ;; cmpxchg4.acq %0=%1,%2,ar.ccv"
: "=r"(r), "+S"(*p)
: "r"(n), "r"(o) : "memory"
);
return r;
}
static uint64_t
cas64(uint64_t volatile* p, uint64_t o, uint64_t n)
{
uint64_t r;
__asm__ __volatile__ (
"mov ar.ccv=%3 ;; cmpxchg8.acq %0=%1,%2,ar.ccv"
: "=r"(r), "+S"(*p)
: "r"(n), "r"(o) : "memory"
);
return r;
}
int main()
{
uint32_t i = 0;
uint64_t j = 0;
return cas32(&i, 0, 1) || cas64(&j, 0, 1);
}
}end && {
static uint32_t
cas32(uint32_t volatile* p, uint32_t o, uint32_t n)
{
uint32_t r;
__asm__ __volatile__ (
"zxt4 %3=%3 ;; mov ar.ccv=%3 ;; cmpxchg4.acq %0=%1,%2,ar.ccv"
: "=r"(r), "+S"(*p)
: "r"(n), "r"(o) : "memory"
);
return r;
}
static uint64_t
cas64(uint64_t volatile* p, uint64_t o, uint64_t n)
{
uint64_t r;
__asm__ __volatile__ (
"mov ar.ccv=%3 ;; cmpxchg8.acq %0=%1,%2,ar.ccv"
: "=r"(r), "+S"(*p)
: "r"(n), "r"(o) : "memory"
);
return r;
}
#define _aso_cas32(p,o,n) cas32(p,o,n)
#define _aso_cas64(p,o,n) cas64(p,o,n)
#if _ast_sizeof_pointer == 8
#define _aso_casptr(p,o,n) ((void*)cas64((uint64_t*)p,(uint64_t)o,(uint64_t)n))
#else
#define _aso_casptr(p,o,n) ((void*)cas32((uint32_t*)p,(uint32_t)o,(uint32_t)n))
#endif
}
elif aso note{ ppc asm compare and swap }end link{
#include "FEATURE/common"
static uint32_t
cas32(uint32_t volatile* p, uint32_t o, uint32_t n)
{
int r;
__asm__ __volatile__ (
"0: lwarx %0,0,%1 ;"
" xor. %0,%3,%0;"
" bne 1f;"
" stwcx. %2,0,%1;"
" bne- 0b;"
"1:"
: "=&r"(r)
: "r"(p), "r"(n), "r"(o)
: "cr0", "memory"
);
__asm__ __volatile__ ("isync" : : : "memory");
return r ? *p : o;
}
static uint64_t
cas64(uint64_t volatile* p, uint64_t o, uint64_t n)
{
long r;
__asm__ __volatile__ (
"0: ldarx %0,0,%1 ;"
" xor. %0,%3,%0;"
" bne 1f;"
" stdcx. %2,0,%1;"
" bne- 0b;"
"1:"
: "=&r"(r)
: "r"(p), "r"(n), "r"(o)
: "cr0", "memory"
);
__asm__ __volatile__ ("isync" : : : "memory");
return r ? *p : o;
}
int main()
{
uint32_t i = 0;
uint64_t j = 0;
return cas32(&i, 0, 1) || cas64(&j, 0, 1);
}
}end && {
static uint32_t
cas32(uint32_t volatile* p, uint32_t o, uint32_t n)
{
int r;
__asm__ __volatile__ (
"0: lwarx %0,0,%1 ;"
" xor. %0,%3,%0;"
" bne 1f;"
" stwcx. %2,0,%1;"
" bne- 0b;"
"1:"
: "=&r"(r)
: "r"(p), "r"(n), "r"(o)
: "cr0", "memory"
);
__asm__ __volatile__ ("isync" : : : "memory");
return r ? *p : o;
}
static uint64_t
cas64(uint64_t volatile* p, uint64_t o, uint64_t n)
{
long r;
__asm__ __volatile__ (
"0: ldarx %0,0,%1 ;"
" xor. %0,%3,%0;"
" bne 1f;"
" stdcx. %2,0,%1;"
" bne- 0b;"
"1:"
: "=&r"(r)
: "r"(p), "r"(n), "r"(o)
: "cr0", "memory"
);
__asm__ __volatile__ ("isync" : : : "memory");
return r ? *p : o;
}
#define _aso_cas32(p,o,n) cas32(p,o,n)
#define _aso_cas64(p,o,n) cas64(p,o,n)
#if _ast_sizeof_pointer == 8
#define _aso_casptr(p,o,n) ((void*)cas64((uint64_t*)p,(uint64_t)o,(uint64_t)n))
#else
#define _aso_casptr(p,o,n) ((void*)cas32((uint32_t*)p,(uint32_t)o,(uint32_t)n))
#endif
}
endif
aso fcntl note{ fcntl(F_SETLCK[W]) work }end link{
#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>
int main()
{
struct flock lock;
lock.l_type = F_WRLCK;
lock.l_whence = SEEK_SET;
lock.l_start = 0;
lock.l_len = 1;
return fcntl(1, F_SETLKW, &lock) < 0;
}
}end
aso semaphore note{ semget semop semctl work }end link{
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ipc.h>
#include <sys/sem.h>
int main()
{
int id;
struct sembuf sem;
if ((id = semget(IPC_PRIVATE, 16, IPC_CREAT|IPC_EXCL|S_IRUSR|S_IWUSR)) < 0)
return 1;
sem.sem_num = 0;
sem.sem_op = 1;
sem.sem_flg = 0;
if (semop(id, &sem, 1) < 0)
return 1;
if (semctl(id, 0, IPC_RMID) < 0)
return 1;
return 0;
}
}end
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