8 lines
361 B
C
8 lines
361 B
C
#include "posix_types.h"
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// atomic "compare and swap". compare the machine word at <location> against
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// <expected>; if not equal, return false; otherwise, overwrite it with
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// <new_value> and return true.
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extern bool CAS_(uintptr_t* location, uintptr_t expected, uintptr_t new_value);
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#define CAS(l,o,n) CAS_((uintptr_t*)l, (uintptr_t)o, (uintptr_t)n) |