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Added more CAS operations

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This commit is contained in:
Justin Ethier 2021-01-05 19:26:15 -08:00
parent 2ca6aa4910
commit a461da48cd
2 changed files with 29 additions and 5 deletions
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24
ck-polyfill.c
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@ -10,15 +10,33 @@
#include "cyclone/types.h" #include "cyclone/types.h"
#include "cyclone/runtime.h" #include "cyclone/runtime.h"
#include <ck_pr.h> #include "ck_pr.h"
#include <unistd.h> #include <unistd.h>
// TODO: global pthread mutex lock for this? obviously not ideal but the // TODO: global pthread mutex lock for this? obviously not ideal but the
// whole purpose of this module is a minimal interface for compatibility // whole purpose of this module is a minimal interface for compatibility
// not speed // not speed
bool bool ck_pr_cas_int(int *target, int old_value, int new_value)
ck_pr_cas_int(int *target, int old_value, int new_value) {
if (*target == old_value) {
*target = new_value;
return true;
}
return false;
}
bool ck_pr_cas_ptr(void *target, void *old_value, void *new_value)
{
if ( *(void **)target == old_value ) {
*(void **)target = new_value;
return true;
}
return false;
// *(void **)v = set;
}
bool ck_pr_cas_8(uint8_t *target, uint8_t old_value, uint8_t new_value)
{ {
if (*target == old_value) { if (*target == old_value) {
*target = new_value; *target = new_value;

10
ck_pr.h
View file

@ -3,7 +3,13 @@
#include <stdbool.h> #include <stdbool.h>
bool bool
ck_pr_cas_int(int *target, int old_value, int new_value); ck_pr_cas_ptr(void *target, void *old_value, void *new_value);
bool
ck_pr_cas_int(int *target, int old_value, int new_value);
bool
ck_pr_cas_8(uint8_t *target, uint8_t old_value, uint8_t new_value);
#endif /* CYCLONE_CK_POLYFILL_H */ #endif /* CYCLONE_CK_POLYFILL_H */