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1.1 ! root 1: ! 2: ! 3: volatile C Keyword volatile ! 4: ! 5: ! 6: ! 7: ! 8: Qualify an identifier as frequently changing ! 9: ! 10: ! 11: The type qualifier volatile marks an identifier as being fre- ! 12: quently changed, either by other portions of the program, by the ! 13: hardware, by other programs in the execution environment, or by ! 14: any combination of these. This alerts the translator to re-fetch ! 15: the given identifier whenever it encounters an expression that ! 16: includes the identifier. In addition, an object marked as ! 17: volatile must be stored at the point where an assignment to this ! 18: object takes place. ! 19: ! 20: ***** See Also ***** ! 21: ! 22: C keyword, const ! 23: ! 24: ***** Notes ***** ! 25: ! 26: Although COHERENT recognizes this keyword, the semantics are not ! 27: implemented in this release. Thus, storage declared to be ! 28: volatile might have references removed by optimizations that the ! 29: compiler performs. The compiler will generate a warning if the ! 30: peephole optimizer is enabled and the keyword volatile is ! 31: detected. ! 32: ! 33: ! 34: ! 35: ! 36: ! 37: ! 38: ! 39: ! 40: ! 41: ! 42: ! 43: ! 44: ! 45: ! 46: ! 47: ! 48: ! 49: ! 50: ! 51: ! 52: ! 53: ! 54: ! 55: ! 56: ! 57: ! 58: ! 59: ! 60: ! 61: ! 62: ! 63: ! 64: COHERENT Lexicon Page 1 ! 65: ! 66:
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