碍人泪离人颜

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碍人泪离人颜 2025-02-20 21:44:00

您需要设置 to not-cors 使其允许交叉原始资源共享。

尝试这样做。

var myHeaders = new Headers();
myHeaders.append("X-Auth-Token", "your token");

var requestOptions = {
  method: 'GET',
  headers: myHeaders,
  redirect: 'follow',
  mode: 'no-cors'
};

fetch("https://api.football-data.org/v4/matches?status=FINISHED", requestOptions)
  .then(result => console.log(result))
  .catch(error => console.log('error', error));

希望它有帮助。

You need to set the request mode to no-cors for it to allow cross-origin resource sharing.

Try doing this.

var myHeaders = new Headers();
myHeaders.append("X-Auth-Token", "your token");

var requestOptions = {
  method: 'GET',
  headers: myHeaders,
  redirect: 'follow',
  mode: 'no-cors'
};

fetch("https://api.football-data.org/v4/matches?status=FINISHED", requestOptions)
  .then(result => console.log(result))
  .catch(error => console.log('error', error));

Hope it helps.

尝试使用X-Auth-Toke访问JSON端点会导致错误

碍人泪离人颜 2025-02-19 10:12:18

您的示例不是最好说明施放 void*的实际问题,可能是 const ,以相同的constness,因为您可以简单地用 type x = t; 替换该行以获取所需的输出。

但是,您可以使用一种类型特征:

#include <iostream>
#include <type_traits>

template <typename From,typename To>
struct preserve_const {
    using type = std::remove_const<To>::type;
};

template <typename From,typename To>
struct preserve_const<const From,To> {
    using type = const To;
};

template <typename From,typename To>
using preserve_const_t = typename preserve_const<From,To>::type;

template<typename type>
void test(type t) {
    std::cout << "t const? = " << std::is_const<decltype(t)>() << std::endl;
    preserve_const_t<type,int> x = t;  
    std::cout << "x const? = " << std::is_const<decltype(x)>() << std::endl;
};

int main() {
    const int x = 0;
    int y = 0;

    test<const int>(x);
    test<int>(y);
}

或如评论中提到的,也许更简单:

template <typename type,typename T>
using the_type = std::conditional_t< std::is_const_v<type>,const T,T>;

Your example isnt the best to illustrate the actual issue to cast a void*, possibly const, to some T* with same constness, because you can simply replace the line with type x = t; to get desired output.

However, you can use a type trait:

#include <iostream>
#include <type_traits>

template <typename From,typename To>
struct preserve_const {
    using type = std::remove_const<To>::type;
};

template <typename From,typename To>
struct preserve_const<const From,To> {
    using type = const To;
};

template <typename From,typename To>
using preserve_const_t = typename preserve_const<From,To>::type;

template<typename type>
void test(type t) {
    std::cout << "t const? = " << std::is_const<decltype(t)>() << std::endl;
    preserve_const_t<type,int> x = t;  
    std::cout << "x const? = " << std::is_const<decltype(x)>() << std::endl;
};

int main() {
    const int x = 0;
    int y = 0;

    test<const int>(x);
    test<int>(y);
}

Or as mentioned in comments and perhaps much simpler:

template <typename type,typename T>
using the_type = std::conditional_t< std::is_const_v<type>,const T,T>;

保存宪法

碍人泪离人颜 2025-02-19 03:22:18

我的实施,非常自我解释

function replaceAll(string, token, newtoken) {
    if(token!=newtoken)
    while(string.indexOf(token) > -1) {
        string = string.replace(token, newtoken);
    }
    return string;
}

My implementation, very self explanatory

function replaceAll(string, token, newtoken) {
    if(token!=newtoken)
    while(string.indexOf(token) > -1) {
        string = string.replace(token, newtoken);
    }
    return string;
}

如何替换字符串的所有出现?

碍人泪离人颜 2025-02-18 15:47:21

只要证书不可启用,将商店设置为LocalMachine就可以了。

Setting the store to LocalMachine is fine as long as the cert is non-exportable.

我在本地服务器上放置哪个证书存储

碍人泪离人颜 2025-02-18 14:46:16

[i]在git bash或powershell中工作正常,但它在WSL/ZSH中不起作用。

这可能表明核心问题。听起来您将项目在Windows驱动器上,例如 c:。这将在WSL下以/mnt/c/path/to/project 的形式引用。

如果是这样,那么您将面临两个问题(这两个问题):

  • 文件访问将非常慢 - 有关详细信息,请参见我的相关答案关于缓慢的NPM/纱线性能。

  • 热重加载功能无法正常工作,因为WSL2中没有针对Windows驱动器的Inotify支持。有关详细信息,请参见我的另一个相关答案关于 nodemon 的热重新加载。它也出现在堆栈溢出上的React,Tailwind和其他情况下。

如其他答案中所述,通常有两个选项。但是,由于您正在运行Ubuntu 22.04,因此其中一个不太可能起作用:

  • 首先,始终建议使用WSL2下的本机文件系统。将项目文件放入〜/src 〜/projects 之类的东西中。这将大大提高性能,并允许iNotify(重新加载)功能工作。

  • 第二,在大多数发行版中,假设您不需要WSL2内核的任何特定功能,则可以使用WSL1。 WSL1与Linux具有相当高的兼容性(对于许多开发人员工具和框架,在99%+范围内的某个位置),但在Windows驱动器中的性能也更好,并且在此处具有Inotify支持。

    但是,,WSL1开始显示出年龄的年龄,Ubuntu 22.04的某些变化在WSL1上打破了很多东西。 gzip 的更改(其他分布可能很快就会捡起),这意味着它不会在WSL1上运行。这导致依赖于 gzip 的其他应用程序中的级联故障。

因此,除非并且在WSL中修复之前,否则我将坚持使用Ubuntu 22.04的WSL2,并使用第一个将文件放在您的WSL2文件系统中的选项。

[I]t is working just fine in Git Bash or PowerShell, but it is not working in WSL/Zsh.

This may indicate the core problem. It sounds like you have the project on a Windows drive, such as C:. This would be referenced under WSL as /mnt/c/path/to/project.

If that's the case, then you'll face two issues (both of which you are having):

  • File access will be very slow - For details see my related answer regarding slow npm/yarn performance.

  • Hot reload functionality won't work since there is no inotify support in WSL2 for Windows drives. For details see another of my related answers regarding hot reload in nodemon. It's also come up for React, Tailwind, and others here on Stack Overflow.

As mentioned in those other answers, there are usually two options. However, since you are running Ubuntu 22.04, one of those is unlikely to work at the moment:

  • First, it's always recommended to use the native filesystem under WSL2. Placing your project files in something like ~/src or ~/projects would suffice. This will improve performance drastically, as well as allow inotify (reload) functionality to work.

  • Second, under most distributions, you can likely use WSL1, assuming you don't need any particular feature of WSL2's kernel. WSL1 has a fairly high level of compatibility with Linux (somewhere in the 99%+ range for many developer tools and frameworks), but also has better performance with Windows drives as well as inotify support there.

    However, WSL1 is starting to show its age a bit, and some changes in Ubuntu 22.04 break things quite a bit more on WSL1. A change in gzip (which other distributions will probably pick up soon if they haven't already) means that it won't run on WSL1. This leads to cascading failures in other applications that depend on gzip.

So, unless and until that is fixed in WSL, I would stick with WSL2 for Ubuntu 22.04 and use the first option of placing files on in your WSL2 filesystem.

HMR不起作用(包裹,WebPack 5)WSL2/Ubuntu 22.04

碍人泪离人颜 2025-02-18 12:09:29

获取此信息的方法有很多 - 这取决于您要访问的方式。 Django文档是一个很好的来源

,这里是一个示例,使用 queryset。 prefetch_releated()(通常是最简单的),

clients = Client.objects.filter(status_id=3).prefetch_related(
    "addresses",
    "phones",
    "emails",
)  # will run all queries at once here

print(clients[0].emails[0].email_address)  # will not run additional query here

这是一个示例,使用 queryset.values()

clients = Client.objects.filter(status_id=3).values(
    "id",
    "first",
    "last",
    "addressess__zip_code",
    "phones__phone_number",
    "emails__email_address"
)
print(clients[0]['emails__email_address'])

这是一个示例,使用 queryset.annotate() and

clients = Client.objects.filter(status_id=3).annotate(
    zip_code=F("addressess__zip_code"),
    phone_number=F("phones__phone_number"),
    email_address=F("emails__email_address"),
)
print(clients[0].email_address)

(注意 - 我不确定骗子在这里如何工作 - 可以使用Postgres -extific


如果其他所有失败,您可以随时写 RAW SQL

clients = Client.objects.raw_sql("SELECT my_field FROM clients JOIN ...")
print(clients[0]["my_field"])

There are many ways to get this information - it depends on how you want to access. Django documentation is a great source

Here is an example using queryset.prefetch_related() (GENERALLY THE EASIEST)

clients = Client.objects.filter(status_id=3).prefetch_related(
    "addresses",
    "phones",
    "emails",
)  # will run all queries at once here

print(clients[0].emails[0].email_address)  # will not run additional query here

Here is an example using queryset.values()

clients = Client.objects.filter(status_id=3).values(
    "id",
    "first",
    "last",
    "addressess__zip_code",
    "phones__phone_number",
    "emails__email_address"
)
print(clients[0]['emails__email_address'])

Here is an example using queryset.annotate() and "F" Expressions

clients = Client.objects.filter(status_id=3).annotate(
    zip_code=F("addressess__zip_code"),
    phone_number=F("phones__phone_number"),
    email_address=F("emails__email_address"),
)
print(clients[0].email_address)

(note - I'm not sure how dupes will work here -- can use something like postgres-specific ArrayAgg)


If all else fails, you can always write raw SQL:

clients = Client.objects.raw_sql("SELECT my_field FROM clients JOIN ...")
print(clients[0]["my_field"])

模型和代码更改以获取带有多个查找表的DB的查询结果

碍人泪离人颜 2025-02-17 12:26:40

如果内容被Flash阻塞,即使使用正确的z索引,则将 wmode =“透明” 添加到Flash Emped脚本。

If the content is obstructed by flash, even with a correct z-index, add wmode="transparent" to the flash embed script.

固定位置div总是出现在顶部吗?

碍人泪离人颜 2025-02-17 11:33:57

给出位置:绝对; to .logo

中心徽标通过添加顶部:50%;变换:translatey(-50%); 属性到 .logo

其余代码从一开始就组织了。

@font-face {
  font-family: 'leander';
  src: url(/Fonts/LEANDER.TTF);
}

body {
  margin: 0;
  background-color: #262626;
}

.topnav {
  position: relative;
  background-color: #141414;
  overflow: hidden;
  text-align: right;
  padding: 14px 20px;
  box-shadow: 0px 5px 10px black;
}

.topnav a {
  position: relative;
  color: white;
  text-align: center;
  padding: 30px 16px;
  text-decoration: none;
  font-size: 17px;
}

.logo {
  position: absolute;
  top: 50%; /*Important for vertical centered element*/
  transform: translateY(-50%); /*vertically centered*/
  color: white;
  font-family: 'leander', sans-serif;
  text-align: left;
  float: left;
}
<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Arclight Web Development</title>
  <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=">
  <link rel="stylesheet" href="app.css">
</head>

<body>
  <div class="topnav">
    <div class="logo">
      <span id="A">A</span>
      <span id="R">R</span>
      <span id="C">C</span>
      <span id="L">L</span>
      <span id="I">I</span>
      <span id="G">G</span>
      <span id="H">H</span>
      <span id="T">T</span>
    </div>
    <a class="active" href="#home">Home</a>
    <a href="#projects">Projects</a>
    <a href="#about">Meet the Dev</a>
    <a href="#contact">Contact</a>
  </div>

  <script src="app.js"></script>
</body>

</html>

Give position: absolute; to .logo.

Center the logo by adding top: 50%; transform: translateY(-50%); properties to .logo.

Rest of code was organized from start.

@font-face {
  font-family: 'leander';
  src: url(/Fonts/LEANDER.TTF);
}

body {
  margin: 0;
  background-color: #262626;
}

.topnav {
  position: relative;
  background-color: #141414;
  overflow: hidden;
  text-align: right;
  padding: 14px 20px;
  box-shadow: 0px 5px 10px black;
}

.topnav a {
  position: relative;
  color: white;
  text-align: center;
  padding: 30px 16px;
  text-decoration: none;
  font-size: 17px;
}

.logo {
  position: absolute;
  top: 50%; /*Important for vertical centered element*/
  transform: translateY(-50%); /*vertically centered*/
  color: white;
  font-family: 'leander', sans-serif;
  text-align: left;
  float: left;
}
<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Arclight Web Development</title>
  <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=">
  <link rel="stylesheet" href="app.css">
</head>

<body>
  <div class="topnav">
    <div class="logo">
      <span id="A">A</span>
      <span id="R">R</span>
      <span id="C">C</span>
      <span id="L">L</span>
      <span id="I">I</span>
      <span id="G">G</span>
      <span id="H">H</span>
      <span id="T">T</span>
    </div>
    <a class="active" href="#home">Home</a>
    <a href="#projects">Projects</a>
    <a href="#about">Meet the Dev</a>
    <a href="#contact">Contact</a>
  </div>

  <script src="app.js"></script>
</body>

</html>

我的NAV栏内容不在我的徽标上。我该如何解决? CSS和HTML

碍人泪离人颜 2025-02-17 10:09:30

结合 a>, >和 >::

df["T"] = ((df.Trend.replace({"Down": 0, "Up": 1}).diff() == -1) + 1).cumsum()

Use a combination of replace, diff, and cumsum:

df["T"] = ((df.Trend.replace({"Down": 0, "Up": 1}).diff() == -1) + 1).cumsum()

计算数据框中的多少个块

碍人泪离人颜 2025-02-17 04:59:49

您可能必须设置SSO/SSH以进行身份​​验证

you may have to setup SSO/SSH for authentication

我如何解决git克隆在443中失败

碍人泪离人颜 2025-02-16 19:02:58

目前,您的URL是形式
urls

因此返回的结果(Google)并不准确。
您也可以将其更改为

`for i in list:
  i="+".join(i.split(" "));          
  user_query = i + "+movie+genre"
  URL = 'https://www.google.com/search?q=+'+user_query`

,属于Cinema Paradiso这样的单一类型的电影中,属于“ Z0LCW”班级的Div。

Currently, your URLs are of the form
URLs

so the returned results(google) aren't accurate for all the movies.
You can change it to

`for i in list:
  i="+".join(i.split(" "));          
  user_query = i + "+movie+genre"
  URL = 'https://www.google.com/search?q=+'+user_query`

also, movies that belong to a single genre like Cinema Paradiso are in a div with class name "Z0LcW".

美丽的汤网刮擦返回非毕顿

碍人泪离人颜 2025-02-16 13:10:23

您无法在OpenXML中读取受保护的文件。

您可以用以下方式识别一个受保护的文件

You can't read a protected file in OpenXML.

You can identify a protected file with:
https://learn.microsoft.com/en-us/dotnet/api/documentformat.openxml.spreadsheet.protection?view=openxml-2.8.1

有什么方法可以通过OpenXML Lib读取加密的XLSX文件?

碍人泪离人颜 2025-02-16 06:00:24

为了避免统一的任何类型的抖动(例如,摄像机在摇晃时添加到 时)使用各种 SmoothDamp 功能,例如 https://docs.unity3d.com/scriptreference/scriptreference/vector3.smoothdamp.html

public float smoothTime = 0.3f; // adjust this to taste
private float distance;
private Vector3 velocity = Vector3.zero;
private Vector3 targetPos

void Update()
{
    distance = cam.transform.position.x * parallax;
    targetPos = new Vector3(startpos + distance, transform.position.y, transform.position.z)
    transform.position = Vector3.SmoothDamp(transform.position, targetPos, ref velocity, smoothTime);
}

To avoid any kind of jitter in Unity (like what the camera is adding to distance when it shakes) use the various SmoothDamp functions e.g. https://docs.unity3d.com/ScriptReference/Vector3.SmoothDamp.html:

public float smoothTime = 0.3f; // adjust this to taste
private float distance;
private Vector3 velocity = Vector3.zero;
private Vector3 targetPos

void Update()
{
    distance = cam.transform.position.x * parallax;
    targetPos = new Vector3(startpos + distance, transform.position.y, transform.position.z)
    transform.position = Vector3.SmoothDamp(transform.position, targetPos, ref velocity, smoothTime);
}

Cinemachine摄像头破坏了2D视差效果,因为它的发抖

碍人泪离人颜 2025-02-15 13:31:11

复制范围的值

Option Explicit

Sub ImportData()
    
    ' Source (open, read from & close)
    Const sFilePath As String = "C:\Users\Temp\Desktop\MyExcelSheet.xlsm"
    Const sName As String = "Summary"
    Const sFirstRowAddress As String = "O6:R6"
    ' Destination (write to & save)
    Const dName As String = "Data"
    Const dFirstCellAddress As String = "A1"
    
    ' Source
    
    Dim swb As Workbook: Set swb = Workbooks.Open(sFilePath)
    Dim sws As Worksheet: Set sws = swb.Worksheets(sName)
    
    Dim srg As Range
     
    With sws.Range(sFirstRowAddress)
        Dim lCell As Range: Set lCell = .Resize(sws.Rows.Count - .Row + 1) _
            .Find("*", , xlFormulas, , xlByRows, xlPrevious)
        If lCell Is Nothing Then
            MsgBox "No data found.", vbCritical
            Exit Sub
        End If
        Set srg = .Resize(lCell.Row - .Row + 1)
    End With
    
    ' Destination
    Dim dwb As Workbook: Set dwb = ThisWorkbook ' workbook containing this code
    Dim dws As Worksheet: Set dws = dwb.Worksheets(dName)
    
    ' Clear & copy.
    With dws.Range(dFirstCellAddress).Resize(, srg.Columns.Count)
        ' Clear previous data.
        .Resize(dws.Rows.Count - .Row + 1).Clear
        ' Copy values by assignment.
        .Resize(srg.Rows.Count).Value = srg.Value
    End With
    
    ' Save & close.
    swb.Close SaveChanges:=False
    'dwb.Save
    
    ' Inform.
    MsgBox "Values copied.", vbInformation
    
End Sub

Copy the Values of a Range

Option Explicit

Sub ImportData()
    
    ' Source (open, read from & close)
    Const sFilePath As String = "C:\Users\Temp\Desktop\MyExcelSheet.xlsm"
    Const sName As String = "Summary"
    Const sFirstRowAddress As String = "O6:R6"
    ' Destination (write to & save)
    Const dName As String = "Data"
    Const dFirstCellAddress As String = "A1"
    
    ' Source
    
    Dim swb As Workbook: Set swb = Workbooks.Open(sFilePath)
    Dim sws As Worksheet: Set sws = swb.Worksheets(sName)
    
    Dim srg As Range
     
    With sws.Range(sFirstRowAddress)
        Dim lCell As Range: Set lCell = .Resize(sws.Rows.Count - .Row + 1) _
            .Find("*", , xlFormulas, , xlByRows, xlPrevious)
        If lCell Is Nothing Then
            MsgBox "No data found.", vbCritical
            Exit Sub
        End If
        Set srg = .Resize(lCell.Row - .Row + 1)
    End With
    
    ' Destination
    Dim dwb As Workbook: Set dwb = ThisWorkbook ' workbook containing this code
    Dim dws As Worksheet: Set dws = dwb.Worksheets(dName)
    
    ' Clear & copy.
    With dws.Range(dFirstCellAddress).Resize(, srg.Columns.Count)
        ' Clear previous data.
        .Resize(dws.Rows.Count - .Row + 1).Clear
        ' Copy values by assignment.
        .Resize(srg.Rows.Count).Value = srg.Value
    End With
    
    ' Save & close.
    swb.Close SaveChanges:=False
    'dwb.Save
    
    ' Inform.
    MsgBox "Values copied.", vbInformation
    
End Sub

复制单元格从一个工作簿到另一个工作簿

碍人泪离人颜 2025-02-14 14:34:43

仅使用POSIX mmap 标志,杰斯特建议的是“乐观”策略,使用 mmap 没有 map_fixed 尝试尝试将新页面分配给您已经拥有的页面。 (第一个arg是您希望它分配的“提示”)。

它没有失败,而是将其分配在其他地方(除非虚拟地址空间已满,但这不太可能在64位)。因此,您需要检测到 mmap 的返回值!=您的提示。可能只是那个未触及的空间,然后再次询问您需要的全尺寸,然后复制。您可以尝试将剩余的空间mmap到您刚刚获得的新页面的末尾,但这可能会失败,然后您正在拨打更多的系统调用。

在Linux上,您将使用 mmap(map_fixed_noreplace)< / code>如果无法分配所需的位置(而不重叠 /替换现有映射),则返回错误。

当然,Linux MREMAP 更好,避免复制数据,如果允许使用相同的物理页面到新的虚拟地址(使用 MREMAP_MAYMOVE )。 ( mremap lets lets REALLOC REALLOC be 更有效地生长大数组。 ,您根本无法获得该功能。


我发现C ++ std :: vector 的设计真的很愚蠢,因此它无法轻易利用 realloc ,因此 MREMAP 即使它存在,可更换是一种潜在的可见副作用。而新的/删除分配器API完全缺乏即使在不可忽视的类型的类型中也可以使用的try-realloc。但是,这种过分保守的设计中的某些高级语言意味着即使存在,低级功能也可能不会得到太多使用,因此,如果Macos缺乏它,我不会感到惊讶。

OTOH,C realloc 当然可以使用 MREMAP 如果原始分配具有其本身的页面,并且很多内容是用C编写的,而不是由C ++的分配器API丢掉。因此,MacOS可能会以某种方式支持类似的内容,但我不知道MacOS特定的系统呼叫详细信息。

我确实查看了darwin XNU内核中的BSD系统调用表“ nofollow noreferrer”> https:href =“ https://stackoverflow.com/ macOS-64-Bit-system-call-table“> MacOS 64位系统呼叫表

问题/48845697 / 使用 0x2000000 class lit中的BSD呼叫家族。

有一个 int MemoryStatus_control(Uint32_t命令,INT32_T PID,UINT32_T标志,user_addr_t buffer,size_t buffersize); ,但这返回 int int ,所以我假设这不是我们''''重新寻找。

我没有看到任何其他有希望的系统呼叫。

我没有检查Macos Man页面上的MMAP;如果它具有任何MacOS特定的标志,例如 map_fixed_noreplace ,希望它们会在那里。

Using only POSIX mmap flags, the "optimistic" strategy is what Jester suggested, using mmap without MAP_FIXED to try to allocate new pages contiguous with what you already have. (The first arg is a "hint" of where you'd like it to allocate).

Instead of failing, it will allocate somewhere else (unless virtual address space is full, but that's unlikely on 64-bit). So you need to detect that mmap's return value != your hint. Probably just munmap that untouched space and ask again with the full size you need, then copy. You could attempt to mmap the remaining space onto the end of the new pages you just got, but that could fail and then you're making even more system calls.

On Linux you'd use mmap(MAP_FIXED_NOREPLACE) to return an error if it can't allocate where you want (without overlapping / replacing existing mappings).

Of course Linux mremap is even better, avoiding ever copying the data, just mapping the same physical pages to a new virtual address if you let it (with MREMAP_MAYMOVE). (mremap lets realloc be much more efficient for growing big arrays.) If MacOS doesn't have similar functionality via any MacOS-specific function calls or mmap flags, you simply can't get that functionality.


I find it really dumb that C++ std::vector is designed so it can't easily take advantage of realloc and thus mremap even if it exists, with replaceable new being a potentially visible side effect. And the new/delete allocator API entirely lacking a try-realloc that you could use even with non-trivially-copyable types. But this overly-conservative design in some higher-level languages means that low-level features might not get much use even if they existed, so I wouldn't be surprised if MacOS lacked it.

OTOH, C realloc certainly can use mremap if the original allocation has its pages to itself, and lots of stuff is written in C, not hobbled by C++'s allocator API. So MacOS might well support something like this somehow, but I don't know MacOS-specific system call details.

I did have a look at the table of BSD system calls in the Darwin XNU kernel https://github.com/opensource-apple/xnu/blob/master/bsd/kern/syscalls.master as suggested by macOS 64-bit System Call Table

There might be other whole categories of system call, but I'd hope that any mmap-related calls would be in the BSD family of calls, using the 0x2000000 class bit.

There is a int memorystatus_control(uint32_t command, int32_t pid, uint32_t flags, user_addr_t buffer, size_t buffersize); but that returns an int, so I assume it's not what we're looking for.

I didn't see any other system calls that looked at all promising for this.

I didn't check the MacOS man page for mmap; if it has any MacOS-specific flags like MAP_FIXED_NOREPLACE, they'd hopefully be there.

如何在Mac OSX上使用虚拟内存/实现Realloc?

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