分段错误11 \ CGEventTap应用程序在任意时间之后停止处理鼠标事件。

Question

此应用程序的目的是在后台24/7运行，并将鼠标锁定在屏幕中心。这是为了工作与一系列的闪光灯程序，以模拟游戏式的运动，为鼠标。我已经尝试过使用Cocoa/Quartz中内置的其他方法来完成这一任务，而这些方法都没有达到我的目的，所以我必须这样做。

我一直在试图找出为什么，经过一段看似随机的时间，这个程序简单地停止限制鼠标。该程序不会出现错误或类似的情况，它只是停止工作。强制退出屏幕上确实写着“没有响应”，然而，我的许多鼠标修改脚本，包括这个，总是被读为“没有响应”，而且它们一直在运行。

下面是代码：

code removed, check below for updated code.

最后更新

Ken给了我正确的答案，我根据他的建议更新了我的代码。下面是我完美地完成的最后一段代码(在手动停止它之前，它运行了12+几个小时，没有任何问题)：

#import <Cocoa/Cocoa.h>
#import <CoreMedia/CoreMedia.h>

int screen_width, screen_height;

struct event_tap_data_struct {
    CFMachPortRef event_tap;
    float speed_modifier;    
};

CGEventRef 
mouse_filter(CGEventTapProxy proxy, CGEventType type, CGEventRef event, struct event_tap_data_struct *);



int
screen_res(int);


int
main(int argc, char *argv[]) {



    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];


    screen_width = screen_res(0);
    screen_height = screen_res(1);
    CFRunLoopSourceRef runLoopSource;
    CGEventMask event_mask = kCGEventMaskForAllEvents;

    CGSetLocalEventsSuppressionInterval(0);
    CFMachPortRef eventTap;
    struct event_tap_data_struct event_tap_data = {eventTap,0.2};

    eventTap = CGEventTapCreate(kCGHIDEventTap, kCGHeadInsertEventTap, 0, event_mask, mouse_filter, &event_tap_data);
    event_tap_data.event_tap = eventTap;
    if (!eventTap) {
        NSLog(@"Couldn't create event tap!");
        exit(1); 
    }

    runLoopSource = CFMachPortCreateRunLoopSource(kCFAllocatorDefault, event_tap_data.event_tap, 0);

    CFRunLoopAddSource(CFRunLoopGetCurrent(), runLoopSource, kCFRunLoopCommonModes);

    CGEventTapEnable(event_tap_data.event_tap, true);

    CFRunLoopRun();

    CFRelease(eventTap);
    CFRelease(runLoopSource);
    [pool release];

    exit(0);
}

int
screen_res(int width_or_height) {

    NSRect screenRect;
    NSArray *screenArray = [NSScreen screens];
    unsigned screenCount = (unsigned)[screenArray count];


    for (unsigned index  = 0; index < screenCount; index++)
    {
        NSScreen *screen = [screenArray objectAtIndex: index];
        screenRect = [screen visibleFrame];
    }
    int resolution_array[] = {(int)CGDisplayPixelsWide(CGMainDisplayID()),(int)CGDisplayPixelsHigh(CGMainDisplayID())};

    if(width_or_height==0){
        return resolution_array[0];
    }else {
        return resolution_array[1];

    }

}


CGEventRef 
mouse_filter(CGEventTapProxy proxy, CGEventType type, CGEventRef event, struct event_tap_data_struct *event_tap_data) {


    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

    if (type == kCGEventTapDisabledByTimeout || type == kCGEventTapDisabledByUserInput) {

        CGEventTapEnable(event_tap_data->event_tap,true);
        return event;

    } else if (type == kCGEventMouseMoved || type == kCGEventLeftMouseDragged || type == kCGEventRightMouseDragged || type == kCGEventOtherMouseDragged){

    CGPoint point = CGEventGetLocation(event);
    NSPoint old_point;

    CGPoint target; 
    int tX = point.x; 
    int tY = point.y; 
    float oX = screen_width/2;
    float oY = screen_height/2;
    float dX = tX-oX;
    float dY = tY-oY;

    old_point.x = floor(oX); old_point.y = floor(oY);

    dX*=2, dY*=2;

    tX = round(oX + dX);
    tY = round(oY + dY);


    target = CGPointMake(tX, tY);


    CGWarpMouseCursorPosition(old_point);
    CGEventSetLocation(event,target);

    }

    [pool release];

    return event;
}

(一)最新情况：

该程序仍然崩溃，但我现在已经运行它作为一个可执行文件，并收到一个错误代码。

当它终止时，控制台记录“分段错误: 11”。

我一直试图找出这意味着什么，然而，这似乎是一个令人印象深刻的广义术语，我还没有磨练一些有用的东西。

下面是我使用的新代码：

#import <Cocoa/Cocoa.h>
#import <CoreMedia/CoreMedia.h>

int screen_width, screen_height;

struct event_tap_data_struct {
    CFMachPortRef event_tap;
    float speed_modifier;    
};

CGEventRef 
mouse_filter(CGEventTapProxy proxy, CGEventType type, CGEventRef event, struct event_tap_data_struct *);



int
screen_res(int);


int
main(int argc, char *argv[]) {


    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];


    screen_width = screen_res(0);
    screen_height = screen_res(1);
    CFRunLoopSourceRef runLoopSource;
    CGEventMask event_mask;
    event_mask = CGEventMaskBit(kCGEventMouseMoved) | CGEventMaskBit(kCGEventLeftMouseDragged) | CGEventMaskBit(kCGEventRightMouseDragged) | CGEventMaskBit(kCGEventOtherMouseDragged);

    CGSetLocalEventsSuppressionInterval(0);
    CFMachPortRef eventTap;
    CFMachPortRef *eventTapPtr = &eventTap;
    struct event_tap_data_struct event_tap_data = {*eventTapPtr,0.2};

    eventTap = CGEventTapCreate(kCGHIDEventTap, kCGHeadInsertEventTap, 0, event_mask, mouse_filter, &event_tap_data);

    if (!eventTap) {
        NSLog(@"Couldn't create event tap!");
        exit(1);
    }

    runLoopSource = CFMachPortCreateRunLoopSource(kCFAllocatorDefault, eventTap, 0);

    CFRunLoopAddSource(CFRunLoopGetCurrent(), runLoopSource, kCFRunLoopCommonModes);

    CGEventTapEnable(eventTap, true);

    CFRunLoopRun();

    CFRelease(eventTap);
    CFRelease(runLoopSource);
    [pool release];

    exit(0);
}

int
screen_res(int width_or_height) {

    NSRect screenRect;
    NSArray *screenArray = [NSScreen screens];
    unsigned screenCount = (unsigned)[screenArray count];


    for (unsigned index  = 0; index < screenCount; index++)
    {
        NSScreen *screen = [screenArray objectAtIndex: index];
        screenRect = [screen visibleFrame];
    }
    int resolution_array[] = {(int)CGDisplayPixelsWide(CGMainDisplayID()),(int)CGDisplayPixelsHigh(CGMainDisplayID())};

    if(width_or_height==0){
        return resolution_array[0];
    }else {
        return resolution_array[1];

    }

}


CGEventRef 
mouse_filter(CGEventTapProxy proxy, CGEventType type, CGEventRef event, struct event_tap_data_struct *event_tap_data) {


    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

    if (type == kCGEventTapDisabledByTimeout || type == kCGEventTapDisabledByUserInput) {

        CGEventTapEnable(event_tap_data->event_tap,true);

    }

    CGPoint point = CGEventGetLocation(event);
    NSPoint old_point;

    CGPoint target; 
    int tX = point.x; 
    int tY = point.y; 
    float oX = screen_width/2;
    float oY = screen_height/2;
    float dX = tX-oX;
    float dY = tY-oY;

    old_point.x = floor(oX); old_point.y = floor(oY);

    dX*=2, dY*=2;

    tX = round(oX + dX);
    tY = round(oY + dY);


    target = CGPointMake(tX, tY);


    CGWarpMouseCursorPosition(old_point);
    CGEventSetLocation(event,target);


    [pool release];

    return event;
}

Answer 1

当事件点击接收到kCGEventTapDisabledByTimeout或kCGEventTapDisabledByUserInput时，您需要重新启用它。

更新:以下是您的行以及它们是如何(失败)工作的：

CFMachPortRef eventTap; // uninitialized value
CFMachPortRef *eventTapPtr = &eventTap; // pointer to eventTap
struct event_tap_data_struct event_tap_data = {*eventTapPtr,0.2}; // dereferences pointer, copying uninitialized value into struct

eventTap = CGEventTapCreate(kCGHIDEventTap, kCGHeadInsertEventTap, 0, event_mask, mouse_filter, &event_tap_data); // sets eventTap but has no effect on event_tap_data