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深入理解 x86/x64 的中断体系 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...下变得异常复杂，你需要为 new task 准备一个 task 信息的 TSS，然而你必须事先要设置好当前的 TSS 块，也就是说，系统中应该有两个 TSS 块：
current TSS
TSS of new task
当前的 TSS 是系统初始化设置好的，这个 TSS 的作用是：当发...
Fastest hash for non-cryptographic uses?
...s is:
$loops = 100000;
$str = "ana are mere";
echo "<pre>";
$tss = microtime(true);
for($i=0; $i<$loops; $i++){
$x = crc32($str);
}
$tse = microtime(true);
echo "\ncrc32: \t" . round($tse-$tss, 5) . " \t" . $x;
$tss = microtime(true);
for($i=0; $i<$loops; $i++){
$x = m...
SQL Server query to find all permissions/access for all users in a database
... a sql user or windows user/group directly
SELECT
[UserName] = CASE princ.[type]
WHEN 'S' THEN princ.[name]
WHEN 'U' THEN ulogin.[name] COLLATE Latin1_General_CI_AI
END,
[UserType] = CASE princ.[type]
WHEN 'S' T...
How does a debugger work?
...dware debugging registers. Following is from that chapter:
T (trap) flag, TSS — Generates a debug exception (#DB) when an attempt is
made to switch to a task with the T flag set in its TSS.
I am not sure whether Window or Linux use this flag or not, but it is very interesting to read that chapte...
What is the difference between user and kernel modes in operating systems?
...ws it. See also: Why doesn't Linux use the hardware context switch via the TSS?
How do programs and operating systems transition between rings?
when the CPU is turned on, it starts running the initial program in ring 0 (well kind of, but it is a good approximation). You can think this initial p...
Performing Breadth First Search recursively
...= bfsNumForest(i+1, q)
val (bb, qqq) = qq.dequeue
val (aa, tss) = qqq.dequeue
tss.enqueue[org.dg.collection.BFSNumber.Tree[Int]](Node(i, aa, bb))
}
}
}
def bfsNumTree[T](t: Tree[T]): Tree[Int] = {
val q = Queue.Empty.enqueue[Tree[T]](t)
val qq = bfsNumForest(1, q)
...
How to change color in circular progress bar?
...et color to a color array on the each progress bar
– Prince
Aug 8 '18 at 7:44
This worked fine for me, just to change ...
Solving “Who owns the Zebra” programmatically?
...inks = "tea coffee milk beer water".split()
cigarettes = "Blend, Prince, Blue Master, Dunhill, Pall Mall".split(", ")
# There are five houses.
minn, maxn = 1, 5
problem = Problem()
# value of a variable is the number of a house with corresponding property
variables = colors + nationalitie...
List of standard lengths for database fields
...Pictonym (a name represented by a picture - this exists due to people like Prince).
A person can have multiple names, playing roles, such as LEGAL, MARITAL, MAIDEN, PREFERRED, SOBRIQUET, PSEUDONYM, etc. You might have business rules, such as "a person can only have one legal name at a time, but mul...
Execute a command line binary with Node.js
... child_process.exec:
var exec = require('child_process').exec;
var cmd = 'prince -v builds/pdf/book.html -o builds/pdf/book.pdf';
exec(cmd, function(error, stdout, stderr) {
// command output is in stdout
});
If you need to use handle process I/O with streams, such as when you are expecting la...