ck_pr_cas (3) - Linux Manuals

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

In ck_pr.h Ft bool Fn ck_pr_cas_ptr void *target void *old_value void *new_value Ft bool Fn ck_pr_cas_ptr_value void *target void *old_value void *new_value void *original_value Ft bool Fn ck_pr_cas_ptr_2 void *target void *old_value void *new_value Ft bool Fn ck_pr_cas_ptr_2_value void *target void *old_value void *new_value void *original_value Ft bool Fn ck_pr_cas_double double *target double old_value double new_value Ft bool Fn ck_pr_cas_double_value double *target double old_value double new_value double *original_value Ft bool Fn ck_pr_cas_char char *target char old_value char new_value Ft bool Fn ck_pr_cas_char_value char *target char old_value char new_value char *original_value Ft bool Fn ck_pr_cas_uint unsigned int *target unsigned int old_value unsigned int new_value Ft bool Fn ck_pr_cas_uint_value unsigned int *target unsigned int old_value unsigned int new_value unsigned int *original_value Ft bool Fn ck_pr_cas_int int *target int old_value int new_value Ft bool Fn ck_pr_cas_int_value int *target int old_value int new_value int *original_value Ft bool Fn ck_pr_cas_64_2 uint64_t target[static 2] uint64_t old_value[static 2] uint64_t new_value[static 2] Ft bool Fn 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] Ft bool Fn ck_pr_cas_64 uint64_t *target uint64_t old_value uint64_t new_value Ft bool Fn ck_pr_cas_64_value uint64_t *target uint64_t old_value uint64_t new_value uint64_t *original_value Ft bool Fn ck_pr_cas_32 uint32_t *target uint32_t old_value uint32_t new_value Ft bool Fn ck_pr_cas_32_value uint32_t *target uint32_t old_value uint32_t new_value uint32_t *original_value Ft bool Fn ck_pr_cas_16 uint16_t *target uint16_t old_value uint16_t new_value Ft bool Fn ck_pr_cas_16_value uint16_t *target uint16_t old_value uint16_t new_value uint16_t *original_value Ft bool Fn ck_pr_cas_8 uint8_t *target uint8_t old_value uint8_t new_value Ft bool Fn ck_pr_cas_8_value uint8_t *target uint8_t old_value uint8_t new_value uint8_t *original_value

DESCRIPTION

The Fn ck_pr_cas 3 family of functions atomically compare the value in Fa target for equality with Fa old_value and if so, replace the value pointed to by Fa target with the value specified by Fa new_value . If the value in Fa target was not equal to the value specified by Fa old_value then no modifications occur to the value in Fa target . The *_value form of these functions unconditionally update Fa original_value .

RETURN VALUES

This family of functions return true if the value in Fa target was modified as a result of the operation. Otherwise, they return false.