intrloc2.c File Reference

#include "exp.h"

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Functions
INTERLOCKED_RESULT	ExInterlockedIncrementLong (IN PLONG Addend, IN PKSPIN_LOCK Lock)
INTERLOCKED_RESULT	ExInterlockedDecrementLong (IN PLONG Addend, IN PKSPIN_LOCK Lock)

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Function Documentation

INTERLOCKED_RESULT ExInterlockedDecrementLong (  IN PLONG  Addend, IN PKSPIN_LOCK  Lock )

Definition at line 75 of file intrloc2.c. References ExInterlockedAddUlong(), and Lock. Referenced by main(). 00082 : 00083 00084 This function atomically decrements Addend, returning an ennumerated 00085 type which indicates what interesting transitions in the value of 00086 Addend occurred due the operation. 00087 00088 Arguments: 00089 00090 Addend - Pointer to variable to decrement. 00091 00092 Lock - Spinlock used to implement atomicity. 00093 00094 Return Value: 00095 00096 An ennumerated type: 00097 00098 ResultNegative if Addend is < 0 after decrement. 00099 ResultZero if Addend is = 0 after decrement. 00100 ResultPositive if Addend is > 0 after decrement. 00101 00102 --*/ 00103 00104 { 00105 LONG OldValue; 00106 00107 OldValue = (LONG)ExInterlockedAddUlong((PULONG)Addend, -1, Lock); 00108 00109 if (OldValue > 1) 00110 return ResultPositive; 00111 00112 if (OldValue == 1) 00113 return ResultZero; 00114 00115 if (OldValue < 1) 00116 return ResultNegative; 00117 } }

INTERLOCKED_RESULT ExInterlockedIncrementLong (  IN PLONG  Addend, IN PKSPIN_LOCK  Lock )

Definition at line 30 of file intrloc2.c. References ExInterlockedAddUlong(), and Lock. Referenced by KeUpdateRunTime(), and main(). 00037 : 00038 00039 This function atomically increments Addend, returning an ennumerated 00040 type which indicates what interesting transitions in the value of 00041 Addend occurred due the operation. 00042 00043 Arguments: 00044 00045 Addend - Pointer to variable to increment. 00046 00047 Lock - Spinlock used to implement atomicity. 00048 00049 Return Value: 00050 00051 An ennumerated type: 00052 00053 ResultNegative if Addend is < 0 after increment. 00054 ResultZero if Addend is = 0 after increment. 00055 ResultPositive if Addend is > 0 after increment. 00056 00057 --*/ 00058 00059 { 00060 LONG OldValue; 00061 00062 OldValue = (LONG)ExInterlockedAddUlong((PULONG)Addend, 1, Lock); 00063 00064 if (OldValue < -1) 00065 return ResultNegative; 00066 00067 if (OldValue == -1) 00068 return ResultZero; 00069 00070 if (OldValue > -1) 00071 return ResultPositive; 00072 }

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