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NAME ck_pr_cas_ptr, ck_pr_cas_ptr_value, ck_pr_cas_ptr_2, ck_pr_cas_ptr_2_value, ck_pr_cas_double, ck_pr_cas_double_value, ck_pr_cas_char, ck_pr_cas_char_value, ck_pr_cas_uint, ck_pr_cas_uint_value, ck_pr_cas_int, ck_pr_cas_int_value, ck_pr_cas_64_2, ck_pr_cas_64_2_value, ck_pr_cas_64, ck_pr_cas_64_value, ck_pr_cas_32, ck_pr_cas_32_value, ck_pr_cas_16, ck_pr_cas_16_value, ck_pr_cas_8, ck_pr_cas_8_value -- atomic compare-and-swap operations LIBRARY Concurrency Kit (libck, -lck) SYNOPSIS #include <ck_pr.h> bool ck_pr_cas_ptr(void *target, void *old_value, void *new_value); bool ck_pr_cas_ptr_value(void *target, void *old_value, void *new_value, void *original_value); bool ck_pr_cas_ptr_2(void *target, void *old_value, void *new_value); bool ck_pr_cas_ptr_2_value(void *target, void *old_value, void *new_value, void *original_value); bool ck_pr_cas_double(double *target, double old_value, double new_value); bool ck_pr_cas_double_value(double *target, double old_value, double new_value, double *original_value); bool ck_pr_cas_char(char *target, char old_value, char new_value); bool ck_pr_cas_char_value(char *target, char old_value, char new_value, char *original_value); bool ck_pr_cas_uint(unsigned int *target, unsigned int old_value, unsigned int new_value); bool ck_pr_cas_uint_value(unsigned int *target, unsigned int old_value, unsigned int new_value, unsigned int *original_value); bool ck_pr_cas_int(int *target, int old_value, int new_value); bool ck_pr_cas_int_value(int *target, int old_value, int new_value, int *original_value); bool ck_pr_cas_64_2(uint64_t target[static 2], uint64_t old_value[static 2], uint64_t new_value[static 2]); bool ck_pr_cas_64_2_value(uint64_t target[static 2], uint64_t old_value[static 2], uint64_t new_value[static 2], uint64_t original_value[static 2]); bool ck_pr_cas_64(uint64_t *target, uint64_t old_value, uint64_t new_value); bool ck_pr_cas_64_value(uint64_t *target, uint64_t old_value, uint64_t new_value, uint64_t *original_value); bool ck_pr_cas_32(uint32_t *target, uint32_t old_value, uint32_t new_value); bool ck_pr_cas_32_value(uint32_t *target, uint32_t old_value, uint32_t new_value, uint32_t *original_value); bool ck_pr_cas_16(uint16_t *target, uint16_t old_value, uint16_t new_value); bool ck_pr_cas_16_value(uint16_t *target, uint16_t old_value, uint16_t new_value, uint16_t *original_value); bool ck_pr_cas_8(uint8_t *target, uint8_t old_value, uint8_t new_value); bool ck_pr_cas_8_value(uint8_t *target, uint8_t old_value, uint8_t new_value, uint8_t *original_value); DESCRIPTION The ck_pr_cas(3) family of functions atomically compare the value in target for equality with old_value and if so, replace the value pointed to by target with the value specified by new_value. If the value in target was not equal to the value specified by old_value then no modi- fications occur to the value in target. The *_value form of these functions unconditionally update original_value. RETURN VALUES This family of functions return true if the value in target was modi- fied as a result of the operation. Otherwise, they return false. SEE ALSO ck_pr_fence_load(3), ck_pr_fence_load_depends(3), ck_pr_fence_store(3), ck_pr_fence_memory(3), ck_pr_load(3), ck_pr_store(3), ck_pr_fas(3), ck_pr_faa(3), ck_pr_inc(3), ck_pr_dec(3), ck_pr_neg(3), ck_pr_not(3), ck_pr_sub(3), ck_pr_and(3), ck_pr_or(3), ck_pr_xor(3), ck_pr_add(3), ck_pr_btc(3), ck_pr_bts(3), ck_pr_btr(3) Additional information available at http://concurrencykit.org/ April 11, 2013 ck_pr_cas(3)
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | SEE ALSO
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