Unix System programming _cha11.6_ thread synchronization

#include #include #include #define Nhash 29#define HASH (FP) ((unsigned long) FP)%nhash)struct Foo *fh[nhash];pthread_mutex_t hashlock = Pthread_mutex_initializer;struct foo{int f_count;pthread_mutex_t F_lock;struct Foo *f_next;int f_id;};struct Foo

Delphi Multi-line Cheng

A few days ago, debugging a bug, the process first not to say, the final debugging to MM, that is, debug DCU, and then into the getmem.inc in the Get/freemem function, after the appearance of Av.And then find ... Depressed n days, and later found

Bubble Sort Method

Bubble Sort:is a simple sort algorithm. It repeatedly visited the sequence to sort, comparing two elements at a time, and swapping them out if they were wrong in the order.The work of the sequence of visits is repeated until no more need to be

QT Threading Simple Learning

Qthread threads, simply inherit the Qthread class and reload the Run method, which you can then use.#ifndef Thread_h #define Thread_hclass public qthread{ q_objectpublic : Thread () { }protected: void run () { //Add code

Light OJ 1214-large Division (congruence theorem)

Title Link: http://lightoj.com/volume_showproblem.php?problem=1214Test instructions is very understood, the use of the same remainder theorem, if a number is divisible by b number, then a%b equals 0. And a is very large, then I will take each of a,

Lab 5: Analyzing the System_call interrupt processing process

Analyzing the System_call interrupt processing processLast week we used the GCC inline assembly to invoke the system call, this time we specifically analyzed the next process.Embed getpid into MenuosThe code is downloaded from GitHub with the

PYQT4 program icon

The program icon is a small picture, usually displayed in the upper-left corner of the program icon (Ubuntu Gnome on the top side).#!/usr/bin/python#-*-coding:utf-8-*-ImportSYS fromPyQt4ImportQtguiclassIcon (qtgui.qwidget):def __init__(Self, parent =

Space &nbsp display distance inconsistency in different browsers workaround

in IE, Firefox, Chrome browser display is not the same, mainly the front of the space width is different.Online information saysDifferent browsers will have different default fonts. General IE default fonts are arial, and the default font for

Poj3190 Interval class greedy + priority queue

Test instructions: Each cow produces milk for A to B, each cow produces milk to occupy a house, ask N cow how many houses to milk total, and output each cow with which houseAnalysis: The problem is a bare greedy, the cows sorted by the start time,

A summary of Agile development Scrum

A summary of Agile development ScrumThis week, I learned agile development, then read the related books, looked up a lot of relevant materials from the Internet, got a deeper understanding of agile development scrum, and summarized the

Configuring the JPA Environment

Problems encountered in configuring the environment:1. Unable to get linksConfirm the user, the password is correct.Find the problem with the driver package (my version is not low, so excluded), that is, the URL address is wrong.Just started looking

nullpointerxception--Treatment Ideas

Concept:1. The so-called pointer, is java A reference to the object in the . LikeString S;thissis the pointer. 2. The so-called null pointer, that is, the contents of the pointer is empty . Like the above.S,If you make it point toNULL,is a null

U disk icon Modification

New text file named Autorun.inf note suffix nameIn text type[Autorun]icon= picture name. icoICO pictures produced by themselves, there are online production sites,Save the text and make the picture together and throw it into the U disk.You can set

PYQT4 Display prompt information

We can set a balloon tip for any widget.#!/usr/bin/python#-*-coding:utf-8-*-ImportSYS fromPyQt4ImportQtgui fromPyQt4ImportQtcoreclassTooltip (qtgui.qwidget):def __init__(Self, parent =None): Qtgui.qwidget.__init__(self, parent) Self.setgeometry (300,

Tech Blog 3

An array is a contiguous set of memory spaces, with the subscript starting at 0 with the maximum subscript one. An array element is a variable. The element type of an array is the type declared when the array is defined, and each element type is

PYQT4 Simple Window Program

The following program shows a simple small window.# !/usr/bin/python # -*-coding:utf-8-*- Import SYS from Import == qtgui.qwidget () widget.resize(.)widget.setwindowtitle (' Moonlight poet') widget.show () Sys.exit (App.exec_ ())Effect:Import

"Electromechanical Drive Control"----study notes Five

One, the transmission motor or the control motor in the industry or the life applicationIn the control motor, the application field of the servo motor is very extensive, and it is used for equipment with relatively high demands on process precision,

The method of construction read Note 04

This week, I read the eighth chapter of the Law of construction, demand analysis. I learned the following:  The analysis of requirements has the following steps:1. Acquiring and directing requirements, 2. Analysis and definition of requirements, 3.

Electromechanical drive control Fifth week operation

Application points of interest: in daily life, the motor of the washing machine, how to control the noise, and the type of work motor, speed and motor-related working conditions, want to know more about the work of the motor.  The refrigerator

HDOJ1010 (BFS)

Why BFS can't do it, can't figure it out#include #include #include using namespace Std;#define MAXN 10int Buf[maxn][maxn],vis[maxn][maxn]={false};int n,m,t;struct node{int x, y;};Node st,ed;int movx[4]={0,0,1,-1};int movy[4]={1,-1,0,0};int check

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