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LOCK

About: hamsterdb is a database engine written in ANSI C. It supports a B+Tree index structure, uses

About: hamsterdb is a database engine written in ANSI C. It supports a B+Tree index structure, uses memory mapped I/O (if available), supports cursors, and can create in-memory databases. Release focus: Major feature enhancements Changes: This release comes with many changes and new features. It can manage multiple databases in one file. A new flag (HAM_LOCK_EXCLUSIVE) places an exclusive LOCK on the file. hamsterdb was ported to Windows CE, and the Solution file for Visual Studio 2005 now supports builds for x64. Several minor bugs were fixed, performance was improved, and small API changes occurred. Pre-built libraries for Windows (32-bit and 64-bit) are available for download. Author: cruppstahl

標簽： C. hamsterdb structure database

上傳時間： 2013-12-11

上傳用戶：LouieWu
學會對文件的記錄鎖定

學會對文件的記錄鎖定，及解鎖。#include <stdio.h> #include <unistd.h> #include <fcntl.h> int main() { int fd int i struct { char name[20] uint ID int age } myrec fd =open("name", O_RDWR|O_CREAT, 0755) if (fd == -1) return -1 printf("Input your name:") scanf("％s", myrec.name) printf("Inpute your ID :") scanf("％d", &myrec.ID) printf("Input your age :") scanf("％d", &myrec.age) lseek(fd, 0,SEEK_END) LOCKf(fd, 1, 0) write(fd, (void *)&myrec, sizeof(myrec)) LOCKf(fd, 0 ,0) return 0 } 執行命令cc LOCK.c –o LOCK.out Chmod +x LOCK.out ./LOCK.out

標簽： 記錄

上傳時間： 2016-01-04

上傳用戶：亞亞娟娟123
If you have programming experience and a familiarity with C--the dominant language in embedded syste

If you have programming experience and a familiarity with C--the dominant language in embedded systems--Programming Embedded Systems, Second Edition is exactly what you need to get started with embedded software. This software is ubiquitous, hidden away inside our watches, DVD players, mobile phones, anti-LOCK brakes, and even a few toasters. The military uses embedded software to guide missiles, detect enemy aircraft, and pilot UAVs. Communication satellites, deep-space probes, and many medical instruments would have been nearly impossible to create without embedded software.

標簽： familiarity programming experience dominant

上傳時間： 2013-12-11

上傳用戶：362279997
鍵盤過濾驅動源碼

鍵盤過濾驅動源碼，本例子是過濾了Caps LOCK鍵,修改成了Ctrl鍵.

標簽： 鍵盤過濾驅動源碼

上傳時間： 2016-10-01

上傳用戶：epson850
SD卡驅動 SD_CARD_TIMEOUT 當一個SD卡的操作超出時限

SD卡驅動 SD_CARD_TIMEOUT 當一個SD卡的操作超出時限，將導致返回錯誤和該標記被置位 SD_CARD_EXIST 當卡槽內插入了合適的卡體，不管是什么卡，都會使該位被設置； SD_CARD_WRITE_PROTECT 當卡體的寫保護開關被 LOCK 時，則該位被設置； SD_CARD_READY 當卡槽內的卡被正確識別，并可以隨時訪問時，則該位被設置； SD_CARD_DOOR_CLOSE 當卡槽的門（產品外殼上的擋板開關）關閉時，則該位被設置； SD_CARD_IS_SD 當卡槽內插入的是 SD 卡時，則該位被設置。 SD_CARD_IS_MMC 當卡槽內插入的是 MMC 卡時，則該位被設置；注意：不要使用 0x80，免得和整數作邏輯運算時被誤為負數。

標簽： SD_CARD_TIMEOUT SD卡驅動操作

上傳時間： 2014-01-09

上傳用戶：稀世之寶039
BlackBerry Hacks will enhance your mobile computing with great tips and tricks. You ll learn that th

BlackBerry Hacks will enhance your mobile computing with great tips and tricks. You ll learn that the BlackBerry is capable of things you never thought possible, and you ll learn how to make it an even better email and web workhorse: Get the most out of the built-in applications Take control of email with filters, searches, and more Rev up your mobile gaming--whether you re an arcade addict or poker pro Browse the web, chat over IM, and keep up with news and weblogs Work with office documents, spell check your messages, and send faxes Become more secure, LOCK down your BlackBerry and stash secure information somewhere safe Manage and monitor the BlackBerry Enterprise Server (BES) and Mobile Data System (MDS) Create web sites that look great on a BlackBerry Develop and deploy BlackBerry applications

標簽： BlackBerry computing enhance mobile

上傳時間： 2016-12-07

上傳用戶：GavinNeko
MTK加密字庫讀手機密碼的好平臺

MTK加密字庫讀手機密碼的好平臺，只要打開平臺手機開機自動聯機點SHOW PHONE LOCK 即可讀出手機密碼

標簽： MTK 加密字庫手機

上傳時間： 2013-12-19

上傳用戶：康郎
A user-space device driver can do many of the things that kernel drivers can t, such as perform a lo

A user-space device driver can do many of the things that kernel drivers can t, such as perform a long-running computation, bLOCK while waiting for an event, or read files from the file system. Unlike kernel drivers, a user-space device driver can use other device drivers--that is, access the network, talk to a serial port, get interactive input from the user, pop up GUI windows, or read from disks. User-space drivers implemented using FUSD can be much easier to debug it is impossible for them to crash the machine, are easily traceable using tools such as gdb, and can be killed and restarted without rebooting even if they become corrupted. FUSD drivers don t have to be in C--Perl, Python, or any other language that knows how to read from and write to a file descriptor can work with FUSD. User-space drivers can be swapped out, whereas kernel drivers LOCK physical memory.

標簽： user-space can drivers perform

上傳時間： 2014-01-01

上傳用戶：saharawalker
java 線程靜態鎖

java 線程靜態鎖，對象鎖， synchronized 是鎖方法還是鎖對象？還是鎖類？如何實現？？部分代碼如下， public static Object LOCK=new Object() //靜態鎖，鎖類，不是鎖對象了！！所以兩個線程同時運行兩個 TestThread 的execute（），也可以同步！！！ public void execute(){ // synchronized(LOCK){ for(int i=0 i<20 i++){ try { Thread.sleep(30) } catch (InterruptedException e) { // TODO Auto-generated catch bLOCK e.printStackTrace() } System.out.println(Thread.currentThread().getName()+Thread.currentThread ().getName()+" "+i) } } }

標簽： java 線程

上傳時間： 2017-07-15

上傳用戶：lijianyu172
單片機電子密碼鎖設計，內含工程文件、源碼文件及電路圖

基于單片機的密碼鎖設計，內含工程文件和源碼文件以及電路圖#include "config.h" void main(){ LCD_Initial(); //lcd初始化 init_sys(); //硬件系統初始化 setpsw(); //密碼設置 while(1) { time=3; //限定嘗試3次 while(1) { inputpsw(); //輸入密碼 checkpsw(); //密碼驗證 checksuper(); //驗證是否是超級密碼 if(error_flag==0) {right();break;} else if(time>1) error(); //允許2次嘗試錯誤 else {LOCK();break;} //3次錯誤,系統鎖定 } }}

標簽： 單片機電子密碼鎖

上傳時間： 2022-07-17

上傳用戶：默默