mlock

0x55db5f7dc1be 0x55db5f7ddf64 0x55db5f7a69d4 0x55db5f7b9498 0x55db5f7b9ae2 0x55db5fb8edd4 0X55DB5FB8EFD1 0x55db5f7cf91f 0x55db5fe8e120 0x7f848d56e6ba 0x7f848d2a482d Key points: Failed to mlock: Cannot allocate memory andGot signal: 6 (Aborted).InvestigationThere are two issue on the Jira of MongoDB that are identical to this one: SERVER-29086 SERVER-28997 Analysissuch as SERVER-28997 Saslscramsha1clientconversations has

For QEMU's startup parameters, QEMU uses some basic framework functions to complete the relevant parsing, which makes it easier for subsequent developers to add functionality. This part of the code is still a bit complicated, so let me summarize. An example of a QEMU-KVM startup parameter is a virtual machine created using Libvirt. /usr/libexec/qemu-kvm -name rhel6.5 -S -M pc-0.15 -enable-kvm -M 1024 -realtime Mlock=off -SMP 1,sock

Ssize_t n = read (mFd, mem-> pointer (), mem-> size ()); If (n MListener-> issueCommand (IStreamListener: EOS, false/* synchronous */); } Else { MListener-> queueBuffer (index, n ); MNumPacketsSent + = n/188; } } //////////////////////////////////////// //////////////////////////////////////// Struct MyConvertingStreamSource: public BnStreamSource { MyConvertingStreamSource (const char * filename ); Virtual void setListener (const sp Virtual void setBuffers (const Vector Virtual void

Bnstreamsource {Myconvertingstreamsource (const char *filename);virtual void Setlistener (const spvirtual void setbuffers (const vectorvirtual void onbufferavailable (size_t index);ProtectedVirtual ~myconvertingstreamsource ();PrivateMutex MLock;Condition mcondition;SpvectorSpssize_t Mcurrentbufferindex;size_t Mcurrentbufferoffset;ListStatic ssize_t writedatawrapper (void *me, const void *data, size_t size);ssize_t writedata (const void *data, size_t

Binder threads that are block is as follows: Since mediaserver is a native C/C ++ code, you need to use address2line to find the corresponding PC pointer address in symbols for source code analysis. The specific process will not be repeated, you can find some special articles for simple learning. After this process, the corresponding source code is as follows: From the above code, we can see that the first code in the implementation of getplayertype is to implement sLock. lock (). If the lock

Asynchronous First, talk about asynchronous IO (Aio) In HP-UX, when synchronous IO is used, this means that the previous IO must return the "successful write" information before the next write Io, and see a performance bottleneck in the synchronous IO mode in a system with a larger IO load. In the case of asynchronous IO, the operating system immediately returns to the application a successful message after the write request is sent, and the rest is done by the operating system. When using Oracl

Background:Implement Seizing - Camera Service when certain applications (such as flashlights) open in the background Camera after, when Cameraapp Open Camera when you can taken possession of by a background application. camera.Note that this modification destroys the Android of the native Camera Service rules that could lead to some tripartite apk An exception occurredProblem: Probabilistic deadlockAnalysis:Close : jni--"cameraclient::d isconnect () {...:Mutex::autolock Lock (

address2line This tool to the corresponding PC pointer address in symbols to find the corresponding source code to analyze, Specific process no longer repeat, we can find some special articles to learn a simple, after this process to get the corresponding source code as follows:From the above code we can see that the first code in the implementation of Getplayertype is to be slock.lock (), if lock does not succeed will wait, so then continue to see the other thread who occupy this lock. by loo

a worker thread to do thingsprivate static Class Worker Implementsrunnable {... Publicvoid run () { synchronized (mLock) { looper.prepare (); Mlooper= Looper.mylooper (); Mlock.notifyall (); } Looper.loop (); } Publicvoid quit () { mlooper.quit (); } }Which Looper. Prepare () is to re-create a looper, view the Looper source, t

circumstances can our child threads be considered a thread with a looper? How do we get the looper handle of it? Looper.mylooper (); Get the current Looper Looper.getmainlooper () Gets the lopper of the UI thread Let's look at the initialization function of handle, if there is no parameter, then he uses the current looper by default, if there is a looper parameter, it is the looper of the corresponding thread. If Looper.prepare () is invoked in one thread, then the system automatically crea

Synchronous Implementation of threads in Android C ++ and android threads Preface In Android C ++, thread synchronization mainly encapsulates the mutex and condition of pthread. So before learning, we recommend that you first understand the implementation of Thread Synchronization in Standard C ++. For more information, see the link: thread learning in C ++. Mutex The implementation source code of Android Mutex is located at/system/core/include/utils/Mutex. h. Let's take a look at the specific i

Write a ListView Easy, write a adapter easy, your own new thread filter data is also easy, but how to maximize the efficiency of filtering, have to mention the android comes with the filter class.Some students must ask, filter data to write a completely no problem, why use the filter class with Android? I used to write thread filtering myself, but recently I encountered a low-distribution machine in my project, Dual-core 0.8GCPU, filtering effect is really bad, optimization, using the Android in

In the previous article, the local playback process of mediaplayer (1) describes the setdatasource process of mediaplayer. This article describes the prepare process of mediaplayer. The process before prepare goes to awesomeplayer, which is basically the same as that of setdatasource. Here, it is omitted directly. The following will start with awesomeplayer. status_t AwesomePlayer::prepare() { ATRACE_CALL(); Mutex::Autolock autoLock(mLock);

From android2.0. Google introduced stagefright and used stagefright in android2.3 to shareLibrary format (libstagefright. So), where awesomeplayer can be used to play video/audio. Awesomeplayer provides many APIs that allow upper-layer applications to use Java/JNI for calling. Here I will briefly describe the video playback process (using the android2.2 source code ). In Java, to play a video, we usually write as follows: MediaPlayer mp = new MediaPlayer();mp.setDataSource(PATH_TO_FILE);mp.pre

The logoff associated with it. As for the Logoff of the thread, handler is not very concerned about it! Eg: we have created a handler instance in the UI thread. At this time, it is passed to the Logoff of the worker thread and can still perform business operations! Eg: -------------------- create a worker thread Private Static final class worker implements runnable { Private Static final object mlock = new object (); Private loopdomainmlow.gov.cn; P

res = broadcastIntentLocked (callerApp,CallerApp! = Null? CallerApp.info. packageName: null,Intent, resolvedType, resul.pdf,ResultCode, resultData, map, requiredPermission, serialized, sticky,CallingPid, callingUid, userId );Binder. restoreCallingIdentity (origId );Return res;} We can see that the ActivityManagerService lock is required for TID = 24. Look at the top of the stack where TID = 12 threads exist. The isScreenOnInternal Function Code of PowerManagerService is as follows:Copy codeThe

("Can't create handler inside thread that has not called logoff. prepare () ") ;}// as you can see above, a Handler instance must be associated with a logoff object; otherwise, mQueue = mloue. mQueue; // Handler Mes SageQueue, is it FIFO? No! I think it should be sorted by time! What is the relationship between Message and MessageQueue? If you are interested, you can study the source code! MCallback = null;} when creating a Handler, you can also specify the logoff. At this time, the logoff obje

action of locking memory is done by the Mlock () function.The prototype of Mlock is as follows:int Mlock (const void *addr,size_t len);The test procedure is as follows:#include #include int main (int argc, char* argv[]){int array[2048];if (Mlock (const void *) array, sizeof (array)) = =-1) {Perror ("

(!mRestoring) { mModel.startLoader(this, true); } Step 2: in step 1, this method is called launchemodel. in the Java class, the main task in this method is to start a thread. Let's take a look at what operations the thread's run () method has done; public void run() { // Optimize for end-user experience: if the Launcher is up and // running with the // All Apps interface in the foreground, load All Apps first. Otherwise, load the // workspace

? MNativeWindow: NULL); // create a decoder mVideoSource if (mVideoSource! = NULL) {int64_t durationUs; if (mVideoTrack-> getFormat ()-> findInt64 (kKeyDuration, durationUs) {Mutex: Autolock autoLock (mMiscStateLock ); if (mDurationUs In the post on the OMX plug-in and Codec component of A31 in the Stagefright multimedia architecture under Android4.2.2, we have made a detailed analysis of OMXCodec: create. Here we will focus on mVideoSource-> start functions, processing of OMXCodec: start: Sta