1QB_ATOMIC_POINTER_COMPARE_ANlDi_bEqXbCHPArNoGgErQ(aB3m_)mAeTrO'MsICM_aPnOuIaNlTER_COMPARE_AND_EXCHANGE(3)
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NAME

6       qb_atomic_pointer_compare_and_exchange   -  Compares  oldval  with  the
7       pointer pointed to by atomic and if  they  are  equal,  atomically  ex‐
8       changes *atomic with newval.
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SYNOPSIS

12       #include <qb/qbatomic.h>
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14       int32_t qb_atomic_pointer_compare_and_exchange(
15           volatile void *QB_GNUC_MAY_ALIAS   *atomic,     /* a pointer to a void* */
16           void                               *oldval,     /* the assumed old value of *atomic */
17           void                               *newval     /* the new value of *atomic*/
18       );
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PARAMS

21       atomic a pointer to a void*
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23       oldval the assumed old value of *atomic
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25       newval the new value of *atomic
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DESCRIPTION

28       Also acts as a memory barrier.
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RETURN VALUE

31       QB_TRUE if atomic was equal oldval, else QB_FALSE.
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SEE ALSO

34       qb_atomic_int_set(3), qb_atomic_int_compare_and_exchange(3),
35       qb_atomic_int_get(3), qb_atomic_int_add(3), qb_atomic_init(3),
36       qb_atomic_pointer_get(3), qb_atomic_int_exchange_and_add(3),
37       qb_atomic_pointer_set(3)
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COPYRIGHT

40       Copyright (C) 2003 Sebastian Wilhelmi
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44LIBQB                             2021Q-B1_1A-T1O2MIC_POINTER_COMPARE_AND_EXCHANGE(3)