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Multi-thread mutex usage (Classic)

You 'd better manually click it.CodeIt is helpful for understanding. SummaryI do not know which of my predecessors wrote the following three methods:1. If you only have a liking for a specific position, You Need To waitone (), but do not forget releasemutex (). Never waitone () Only releasemutex () twice () once (What do you do when you take over MK and don't ls? Even if there are no children, it's not good to hold down the kitten or dog ......);2.

Ndk usage notes

MK File Local_ldlibs: =Connect to the existing static library of ndk. For example, if the C library function is used, you need to use-LC, which is in the user/lib directory. ----- Tips ---- Ndk usage tips 1. How to forcibly output the compilation command:-------------------------------------------Run the "ndk-build v = 1" command" 2. How to force re-compile all source files:-------------------------------------------Use GNU make's "-B" option, as in

Android 2.3 compilation options

It was originally a 64-bit CPU and unfortunately installed with 32-bit Ubuntu... Compile roid 2.43 DaimaDownload complete CodeMake, $ Cd ~ /Mydroid $ Make has the following error: build/CORE/main. MK: 73: You are attempting to build on a 32-bit system. build/CORE/main. MK: 74: only 64-bit build environments are supported beyond froyo/2. 2. this is because froyo/2.2 only supports 64-bit by default. It is

Android: How to preset APK for Android

ZZ: http://blog.csdn.net/sergeycao/article/details/8198205 I. How to preset the APK with source code into the system?1) Under packages/apps, create a new folder with the name of the apk to be preset, and prefabricate an APK named test as an example.2) copy the source code of test APK to the test folder and delete the/bin and/GEN directories.3) create a file named Android. mk in the test directory. The content is as follows:Local_path: = $ (call my-DIR

Android h264 (3): Streaming Media Player Design Scheme

multiple loops, minimize the correlation between the previous loop and the next loop when writing code, and reduce unnecessary code computations;4. Set a reasonable cache. For the Android platform of the Target Platform for FFMPEG transplantation, set the cache size suitable for this platform ;.Here we will not repeat the modifications to specific codes.3.2 FFMPEG TransplantationThe android. mk File Syntax of the ndk makefile released by Google is di

Package APK, so, and other files to system. IMG.

The packaging mentioned in this Article refers to packaging the files you need into system. IMG after compiling with make-J8 in aosp.Here are two more cases. The first one is that APK and so are provided by a third party and have been compiled, as long as they are packaged into system. IMG; the second type is the source code of APK and so, which must be compiled in aosp. In the first case, you can modify product_copy_files in device. mk. Here, you can

Closures in JavaScript

Understanding mandatory Package Three basic facts1. JS allows you to reference variables defined outside of the current function.Exfunction Makesandwich () {var magicingredient = "Peanut butter";function make (filling) { return magicingredient + ' and ' + filling; }return make (' jelly ');}Makesandwich ();2. Even if an external function has returned, the current function can still refer to the variable defined in the external function. This means that you can return an intrinsic function.Exfunc

Use rust for OPENWRT development applications. _openwrt

-linux.patch DIFF-UNR/a/mk/platform.mk/b/mk/platform.mk---a/mk/platform.mk +++ b/mk/platform.mk @@ -404,6 +404,36 @@ -404,6 S_mipsel-linux: =-C target-cpu=mips32-c target-feature= "+mips32,+o32" +# mipsel-openwrt-linux-uclibc configuration + CC_MIPSEL-OPENWRT-LINUX-UCLIBC=MIPSEL-OPENWRT-LINUX-UCLIBC-GCC +cxx_mipsel-op

Long-running SQL in bulk kill MySQL

, 0 rows Affected (0.00 sec)2.Kill all current MySQL connectionsMysqladmin-uroot-p processlist|awk-f "|" ' {print $} ' |xargs-n 1 mysqladmin-uroot-p KillKill the connection run by the specified user, this is MikeMysqladmin-uroot-p processlist|awk-f "|" ' {if ($ = = ' Mike ') print $ ' |xargs-n 1 mysqladmin-uroot-p Kill 3, through the Shel script implementation#杀掉锁定的MySQL连接for ID in ' mysqladmin processlist|grep-i Locked|awk ' {print $} ' do mysqladmin kill ${id}done4. Through the

Mysqldump Principle 2

with READ LOCK 2 Query SET SESSION TRANSACTION Isolation Level REPEATABL E READ 2 query START TRANSACTION with consistent SNAPSHOT 2 Query SHOW MASTER STATUS 2 query You can see the manual 13.2.10.3 about the isolation level. InnoDB and TRANSACTION isolation level, or previous post: [InnoDB Series]-instance resolution InnoDB isolation levels and lock mode. A description of the START TRANSACTION with consistent SNAPSHOT can be seen in the manual: The WITH consistent SNAPSHOT cl

How do I check the Master/Slave latency of the MySQL database?

How can I determine the Master/Slave latency of a MySQL database? In this paper, we introduce two judgment methods: 1. Seconds_Behind_Mastervs2.mk-heartbeat, then we will introduce these content respectively. In daily work, for MySQL master-slave replication check, on the one hand, we need to ensure that the overall structure of replication is normal, on the other hand, we need to check master-slave data How can I determine the Master/Slave latency of

First knowledge of Android JNI (1)

is created is invalid), and then upload the so file to compile the project. Ii. Use NDK to generate a local method (ubuntu and windows) 1. Install NDK: unzip, then enter the directory after NDK unzipping, run build/host-setup.sh (Make 3.81 and awk required). If there is something wrong, modify the host-setup.sh file: Will #! /Bin/sh #! /Bin/bash: Run it again. 2. Create your own project folder under the apps folder, and then create the Application. mk

Preliminary Experience of V8 javascript Engine

variables shocould be enough) and compile. For example: export CXX=/path/to/cross-compile-g++export LINK=/path/to/cross-compile-g++make arm.release (Compilation is waiting .....) After that, you can use it. Use on android First, create a project (how to create it? This... Find it by yourself), an Activity project, and then create a jni directory under the project directory. I don't want to talk about how to use ndk. Find it by yourself. I'll focus on it:1. Copy the header file and Library File

Ten essential tools for MySQL administrators (1)

MySQL tool: mk-query-digest Nothing is worse than low MySQL performance. Although we often subconsciously think that the hardware configuration lags behind, the real crux of the problem is not here in most cases. Poor performance is often caused by the following reasons: slow execution of some queries blocks the smooth execution of other query commands, and thus produces a vicious circle of slow response time. Optimizing query commands saves a lot of

Bzoj 3205: [Apio2013] Robot "dfs+ Steiner Tree +SPFA"

][y][t]=qwe (x, y);returnDis[x][y][t]=dfs (xx,yy,k);}voidSPFA (intLintR) {memset (s),0,sizeof(s)); Memset (MK,0,sizeof(MK));intMn=inf,mx=-inf; for(intI=1; iif(VA[I]if(VA[I]GT;MX) mx=va[i]; mk[q[i].x][q[i].y]=1; } for(intI=mn+1; i-1]; for(intI=1; i for(intI=1; i+1];intLl=0, rr=0; while(top| | LL!=RR) {intNow=ll%m+1; Qwe u;if(ll==rr| | (Topf[l][r][q[top]

Storm series (15) architecture Analysis Executor-spout

The spout implements the Mk-threads interface for creating a message loop main function that corresponds to executor. Defmulti mk-threads Executor-selector The main message loop of the Mk-threads function is implemented by the Async-loop method, and if the passed-in function is a factory method, it is initialized the first time the method is called and returns th

Android init. RC Script Modification-[based on x210 Development Board]

In many cases, we need to modify init. RC to meet different application requirements. Here we provide two ways to modify it:I. general modification methodIn the device/Samsung/smdkv210 directory, there are two files: init. RC and init_sdmmc.rc. If the image is stored inIn the SD card, you need to modify init_sdmmc.rc. If the image is stored in NAND, You need to modify the init. RC file.After the modification, run./MK-S. The modified file will be packa

Process for adding Burmese

1. Modify the productconfig. mk file. Find the macro mtk_product_locales in the mediatek/config/$ {project}/projectconfig. mk file and add the language code to be added. For example, the Burmese language is my_mm;2. Add ICU resource 2.1. Copy the TXT file of the ICU resource to the corresponding folder. Because the ICU resources of my_mm are not available in version 4.4.1 but are available in version 4.6 of

Call process of mediaplay and opencore in Android Multimedia Framework

case, the playersetvideosurface command will be used to call the handlesetvideosurface function in playerdriver.(2) The implementation of the handlesetvideosurface function is as follows:Void playerdriver: handlesetvideosurface (playersetvideosurface * EC) Create mvideooutputmio (type: pvmiocontrol) as a member. The class is androidsurfaceoutput. This class inherits pvmimiocontrol and can be used as pvmiocontrol. Then, call pvmediaoutputnodefactory: createmediaoutputnode to create mvideonode of

Compiling Android source code in Ubuntu 11.10 (32-bit System)

=fullTARGET_BUILD_VARIANT=engTARGET_SIMULATOR=falseTARGET_BUILD_TYPE=releaseTARGET_BUILD_APPS=TARGET_ARCH=armHOST_ARCH=x86HOST_OS=linuxHOST_BUILD_TYPE=releaseBUILD_ID=GRI40============================================ 1. Start Compilation The compilation process may be aborted due to many errors. Here, Wayne will post all the problems and solutions for future reference. 1. Q: Wayne @ Wayne-PC :~ /Android/source $ make-J2========================================================== ====Platform_versi

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