Golang中Mmap() package中的x/sys/unix系统调用返回[]byte类型，而底层系统调用实际返回指针。它是如何做到的？
更具体地说，在Golang开发人员的this包中，VirtualAlloc函数只返回一个指针。如何将其转换为字节切片，与在Unix包中完成的方式相同？
答案 0 :(得分：4)
使用<!DOCTYPE html>
<html>
<head>
<title>
login
</title>
</head>
<body>
<?php
session_start();
// Authenticates existing users
?>
<form method="post" action="login.php">
Username: <input type="text" name="username"><br>
Password: <input type="password" name="password"><br>
<input type="submit" value="Login">
</form>
<?php
if ($_SERVER["REQUEST_METHOD"] == "POST")
{
// Connect to the database
$mysqli = new mysqli("localhost", "bwright4", "H01597127", "bwright4");
// Output error info if there was a connection problem
if ($mysqli->connect_errno)
die("Failed to connect to MySQL: ($mysqli->connect_errno) $mysqli->connect_error");
//Username information
$username = mysql_real_escape_string($_POST['username']);
// Check username and password
$password = $_POST["password"];
$password_hash = password_hash($password, PASSWORD_BCRYPT);
// bcrypt hash for "abc"
$actual_hash = '$2y$10$yd/WAu0wdbgzPk0TDNVBf.MZ0TD6pwKLM18O73aAwOdYs4291/wha';
$sql = mysql_query("SELECT * FROM users_table WHERE username='$username'");
if(mysql_num_rows($sql) == 1)
{
$row = mysql_fetch_array($sql);
if (password_verify($password, $actual_hash))
{
$_SESSION["login"] = "True";
header("Location: index.php");
exit;
}
else
echo "<p>Wrong password</p>";
}
}
?>
<body>
</html>
软件包，unsafe可以在其未导出的golang.org/x/sys/unix类型的Mmap方法中执行相同的操作：
mmapper答案 1 :(得分：2)
您可以使用// C data with explicit length to Go []byte
func C.GoBytes(unsafe.Pointer, C.int) []byte
之类的内容（例如see here）：
{{1}}