Mac OS X 程序提供 EXEC_BAD_ACCESS
在我的模块之一中，我需要维护基于事件的机制。逻辑是：
发送事件：
-(void)addEvent:(EventData *)pData{
[self enQueueEvent:pData];
[[NSNotificationCenter defaultCenter]
postNotificationName:EVENT_NAME
object:nil ];
}
-(void)enQueueEvent:(EventData *)pData{
[pEventLock lock];
[self.pEventArray insertObject:(NSObject *)pData atIndex:0];
[pEventLock unlock];
}
收到事件时：
-(void)EventHandler: (NSNotification *) notification
{
[self log:@"event Handled"];
EventData *pData = [self deQueueEvent];
if(pData){
switch(pData->eModuleId){
case UI_EVENT:{
[UIController HandleUICallBack:(EventType)pData->eType LParam:pData->lParam WParam:pData->wParam];
}
}
pData->lParam = 0x00;
pData->wParam = 0x00;
free(pData);
// [pData release];
//[self removeProcessedEvent];
}
}
-(EventData *)deQueueEvent{
[pEventLock lock];
NSObject *pData = [self.pEventArray lastObject];
[self.pEventArray removeLastObject];
[pEventLock unlock];
return (EventData *)pData;
}
>>>>>>> Adding Header File Declaration >>>>>>>>>>>>>>>>>>>
typedef struct __eventData{
ModuleId eModuleId;
EventType eType;
void *lParam;
void *wParam;
}EventData;
@interface CommEventHandler : NSObject {
NSMutableArray *pEventArray;
bool shouldStartTimer;
int timerValue;
NSLock *pEventLock;
}
@property(nonatomic,retain)NSMutableArray *pEventArray;
@property(nonatomic,retain)NSLock *pEventLock;
<<<<<<<<<<<<<<<< End of Header File <<<<<<<<<<<<
我相信这很容易理解。现在发生的事情是，当我在 10.6 | 中运行程序时应用程序名称 |调试| i386 它运行得很好，但是当我在 10.6 | 中运行该程序时应用程序名称 |调试| X86_64 将节点插入事件数组时出错。谁能告诉我如何调试？我检查了所有内存方面，但没有找到任何东西。
In one of my modules I need to maintain event-based mechanism. The logic is:
To send the event:
-(void)addEvent:(EventData *)pData{
[self enQueueEvent:pData];
[[NSNotificationCenter defaultCenter]
postNotificationName:EVENT_NAME
object:nil ];
}
-(void)enQueueEvent:(EventData *)pData{
[pEventLock lock];
[self.pEventArray insertObject:(NSObject *)pData atIndex:0];
[pEventLock unlock];
}
When event received:
-(void)EventHandler: (NSNotification *) notification
{
[self log:@"event Handled"];
EventData *pData = [self deQueueEvent];
if(pData){
switch(pData->eModuleId){
case UI_EVENT:{
[UIController HandleUICallBack:(EventType)pData->eType LParam:pData->lParam WParam:pData->wParam];
}
}
pData->lParam = 0x00;
pData->wParam = 0x00;
free(pData);
// [pData release];
//[self removeProcessedEvent];
}
}
-(EventData *)deQueueEvent{
[pEventLock lock];
NSObject *pData = [self.pEventArray lastObject];
[self.pEventArray removeLastObject];
[pEventLock unlock];
return (EventData *)pData;
}
>>>>>>> Adding Header File Declaration >>>>>>>>>>>>>>>>>>>
typedef struct __eventData{
ModuleId eModuleId;
EventType eType;
void *lParam;
void *wParam;
}EventData;
@interface CommEventHandler : NSObject {
NSMutableArray *pEventArray;
bool shouldStartTimer;
int timerValue;
NSLock *pEventLock;
}
@property(nonatomic,retain)NSMutableArray *pEventArray;
@property(nonatomic,retain)NSLock *pEventLock;
<<<<<<<<<<<<<<<< End of Header File <<<<<<<<<<<<
I believe this is easy to understand. Now what is happening is that when I run the program in 10.6 | App Name | Debug | i386 it runs perfectly fine, but when I run the program in 10.6 | App Name | Debug | X86_64 it faults while inserting a node into the Event array. Can anyone give me a clue how to debug ? I checked all memory aspects, but failed to find anything.
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如果
CommEventData与EventData相同，则两者都不是 Objective-C 类。因此，您不能将CommEventData *类型的值添加到NSMutableArray中，因为NSMutableArray需要一个 Objective-C 对象 — 特别是一个 Objective-响应-retain和-release的 C 对象。如果添加的不是对象，无论(NSObject *)类型转换如何，这都会崩溃。如果将
EventData和CommEventData转换为 Objective-C 类，则可以使用NSMutableArray。否则，如果您想要存储指向非 Objective-C 对象的值的指针（例如指向
结构的指针），请考虑使用NSPointerArray。请注意，由于 NSPointerArray 允许任意（指向）值，因此它不会获取或释放其元素的所有权。If
CommEventDatais the same asEventData, then both aren’t Objective-C classes. As such, you cannot add values of typeCommEventData *to anNSMutableArraybecauseNSMutableArrayexpects an Objective-C object — in particular, an Objective-C object that responds to both-retainand-release. This will crash if what’s being added is not an object regardless of the(NSObject *)typecast.If you convert
EventDataandCommEventDatato Objective-C classes, you can useNSMutableArray.Otherwise, if you want to store pointers to values that are not Objective-C objects (e.g. pointers to
structs), consider usingNSPointerArrayinstead. Note that sinceNSPointerArrayallows arbitrary (pointers to) values, it doesn’t take ownership of nor release its elements.