libkern/gen/OSAtomicOperations.c

83 UInt32	OSBitAndAtomic(UInt32 mask, volatile UInt32 * value)
85 	return OSBitwiseAtomic(mask, 0, 0, value);
89 UInt32	OSBitOrAtomic(UInt32 mask, volatile UInt32 * value)
91 	return OSBitwiseAtomic((UInt32) -1, mask, 0, value);
95 UInt32	OSBitXorAtomic(UInt32 mask, volatile UInt32 * value)
97 	return OSBitwiseAtomic((UInt32) -1, 0, mask, value);
102 	UInt32				mask		= 0x000000ff;
110 	mask <<= shift;
113 	oldValue = (oldValue & ~mask) | (oldValue8 << shift);
114 	newValue = (oldValue & ~mask) | (newValue8 << shift);
121 	UInt8		mask = 1;
126 	mask <<= (7 - (bit % 8));
127 	wantValue = wantSet ? mask : 0;
131 		if ((oldValue & mask) == wantValue) {
134 	} while (! OSCompareAndSwap8(oldValue, (oldValue & ~mask) | wantValue, startAddress));
136 	return (oldValue & mask) == wantValue;
203 UInt8	OSBitAndAtomic8(UInt32 mask, volatile UInt8 * value)
205 	return OSBitwiseAtomic8(mask, 0, 0, value);
208 UInt8	OSBitOrAtomic8(UInt32 mask, volatile UInt8 * value)
210 	return OSBitwiseAtomic8((UInt32) -1, mask, 0, value);
213 UInt8	OSBitXorAtomic8(UInt32 mask, volatile UInt8 * value)
215 	return OSBitwiseAtomic8((UInt32) -1, 0, mask, value);
220 	UInt32				mask		= 0x0000ffff;
228 	mask <<= shift;
231 	oldValue = (oldValue & ~mask) | (oldValue16 << shift);
232 	newValue = (oldValue & ~mask) | (newValue16 << shift);
273 UInt16	OSBitAndAtomic16(UInt32 mask, volatile UInt16 * value)
275 	return OSBitwiseAtomic16(mask, 0, 0, value);
278 UInt16	OSBitOrAtomic16(UInt32 mask, volatile UInt16 * value)
280 	return OSBitwiseAtomic16((UInt32) -1, mask, 0, value);
283 UInt16	OSBitXorAtomic16(UInt32 mask, volatile UInt16 * value)
285 	return OSBitwiseAtomic16((UInt32) -1, 0, mask, value);