libkern/gen/OSAtomicOperations.c

49  * native Boolean	CompareAndSwap(UInt32 oldValue, UInt32 newValue, UInt32 * oldValuePtr);
71 	UInt32	oldValue;
75 		oldValue = *value;
76 		newValue = ((oldValue & and_mask) | or_mask) ^ xor_mask;
77 	} while (! OSCompareAndSwap(oldValue, newValue, value));
79 	return oldValue;
107 	UInt32				oldValue;
112 	oldValue = *value32;
113 	oldValue = (oldValue & ~mask) | (oldValue8 << shift);
114 	newValue = (oldValue & ~mask) | (newValue8 << shift);
116 	return OSCompareAndSwap(oldValue, newValue, value32);
122 	UInt8		oldValue;
130 		oldValue = *startAddress;
131 		if ((oldValue & mask) == wantValue) {
134 	} while (! OSCompareAndSwap8(oldValue, (oldValue & ~mask) | wantValue, startAddress));
136 	return (oldValue & mask) == wantValue;
156 	SInt32	oldValue;
160 		oldValue = *value;
161 		newValue = oldValue + amount;
162 	} while (! OSCompareAndSwap((UInt32) oldValue, (UInt32) newValue, (UInt32 *) value));
164 	return oldValue;
179 	SInt8	oldValue;
183 		oldValue = *value;
184 		newValue = oldValue + amount;
185 	} while (! OSCompareAndSwap8((UInt8) oldValue, (UInt8) newValue, (volatile UInt8 *) value));
187 	return oldValue;
192 	UInt8	oldValue;
196 		oldValue = *value;
197 		newValue = ((oldValue & and_mask) | or_mask) ^ xor_mask;
198 	} while (! OSCompareAndSwap8(oldValue, newValue, value));
200 	return oldValue;
225 	UInt32				oldValue;
230 	oldValue = *value32;
231 	oldValue = (oldValue & ~mask) | (oldValue16 << shift);
232 	newValue = (oldValue & ~mask) | (newValue16 << shift);
234 	return OSCompareAndSwap(oldValue, newValue, value32);
249 	SInt16	oldValue;
253 		oldValue = *value;
254 		newValue = oldValue + amount;
255 	} while (! OSCompareAndSwap16((UInt16) oldValue, (UInt16) newValue, (volatile UInt16 *) value));
257 	return oldValue;
262 	UInt16	oldValue;
266 		oldValue = *value;
267 		newValue = ((oldValue & and_mask) | or_mask) ^ xor_mask;
268 	} while (! OSCompareAndSwap16(oldValue, newValue, value));
270 	return oldValue;