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or application is about to closeWm_contextmenu send this message to this window when a user clicks the right button in a windowWm_copydata send this message when an application is passed to another applicationWm_create application creates a windowWm_destroy a window is destroyedWm_endsession when the system process issues a WM_QUERYENDSESSION message, the message is sent to the application informing it that the conversation is overWm_erasebkgnd called when the window background must be erasedWm

(inti=1;i) {System.out.print (i+","); if(i%2==0) {object.notifyall ();//Wake up other threads competing for permissions Try{object.wait ();//Release the lock and enter the waitSYSTEM.OUT.PRINTLN ("Digital print class hits full print the current object has an object lock thread" +thread.currentthread (). GetName ());//output The name of the thread that currently owns the lock}Catch(interruptedexception e) {e.printstacktrace (); }

synchronization are correct), and that other threads that are correctly synchronized can see the latest values for those variables. By defining a clear, cross-platform memory model that has been modified in JDK 5.0 to correct some of the errors in the original definition, it is possible to build a concurrency class "write once, run Anywhere", by following this simple rule: Whenever you write a variable that might be read by another thread, or if the variable you are reading is finall

roles to view the roles of the current user User_tab_privs: This view is primarily about storing permission information for all tables under the current user. User_users: Mainly describes the current user's information, view the current user's default tablespace, including the current user name, account ID, account status, table space name, creation time, etc., all user-related data User_tables: Query which tables the user owns, mainly describes all

tb_system_ddl_logs. Object_type is ' object category '; COMMENT on column Tb_system_ddl_logs.is_alter_column is ' when the column is modified is true, otherwise false '; COMMENT on column Tb_system_ddl_logs.is_drop_column is ' when column isDROPThe time is true, otherwise false'; COMMENT on COLUMN tb_system_ddl_logs. SQL_ID is 'sql_id'; COMMENT on COLUMN tb_system_ddl_logs. Sql_text is 'SQLStatement'; COMMENT on COLUMN tb_system_ddl_logs. Current_User is 'CurrentSESSIONThe name of the user who

Auto_ptr is a smart pointer provided in the current C + + standard library, admittedly, auto_ptr is so unsatisfactory that programmers have to use it very carefully, as with "bare" pointers, to ensure that there is no error. That it can't even apply to so many containers and algorithms in the same standard library, but even so, we still can't deny the value and idea of this little auto_ptr.Here is a auto_ptr version written by Nicolai M. Josuttis ( Namespace std{Template1 Constructors and des

state returns WAIT_OBJECT_0, if the time exceeds the dwmilliseconds value but the time event or no signal state returns wait_timeout;This value is 0, which means returning immediatelyThis value is infinite, which represents infinite waits.return valueWAIT_OBJECT_0: Function returned successfully, signal status detected within the specified timeWait_failed: Function failed, call GetLastError () to see more messagesWait_timeout: Wait time is up, signal status has not been detectedWait_abandoned:

"Prototype" literal translation is "prototype", is the main means of javascript implementation of inheritance. Roughly speaking: prototype is a reserved property of a function in JavaScript, and its value is an object (we can call this object "prototype object").The object that is constructed with this function as a constructor automatically has the member properties and methods of the prototype object that owns the constructor.Among the key points ar

Three basic functions used in thread interaction:void Notify (); Wakes a single thread waiting on this object monitor.void Notifyall (); Wakes all the threads waiting on this object monitor.void Wait () causes the current thread to wait until another thread calls the Notify () or Notifyall () method of this object.The overloaded version of the Wait () also causes the current thread to wait until another thread calls the Notify () or Notifyall () method of this object, or waits longer than the sp

SQL Server Delete User steps 1, SQL Server MANAGEMENT studio--database-"security-" framework, first delete the corresponding framework 2, SQL Server MANAGEMENT studio--database-"Security-" users, delete the corresponding user to delete the corresponding schema, and then delete the corresponding users. The above method I can't delete the user SQL Server 2000 cannot delete a user's workaround. This problem was encountered today when data was being transferred, and the solution was as follows:

10300-ecological premiumtime limit:3.000 seconds Http://uva.onlinejudge.org/index.php?option=com_onlinejudgeItemid=8category=94page=show_problem problem=1241 German farmers are given a premium depending on the conditions at their. Imagine the following simplified regulation:you know the size of each farmer ' s farmyard in square meters and the number O F Animals living at it. We won ' t make a difference between different animals, although the this are far from reality. Moreover you have infor

problem, it is arguably not a difficult task to write a solution program in Erlang. Post the zebra issue first: Five Men of different nationality (England, Spain, Japan, Italy, Norway) live in the The the the the "a street." They all have a profession (painter, diplomat, violinist, doctor, sculptor), one animal (dog, Zebra, fox, snail, hors e), and one favorite drink (juice, water, tea, coffee, milk), all different from the others. Each of the houses are painted in a color different to others (

) {WaitForSingleObject (Hmutex, INFINITE); if(Tickets >0) {printf ("ID =%d T1 =%d\n", GetCurrentThreadID (), tickets--); } Else { Break; } ReleaseMutex (Hmutex); Sleep ( -); } return 0;} DWORD WINAPI Thread2fun (lpvoid lpparam) { while(true) {WaitForSingleObject (hmutex,infinite); if(tickets>0) {printf ("ID =%d t2 =%d\n", GetCurrentThreadID (), tickets--); } Else { Break; } ReleaseMutex (Hmutex); Sleep ( -); } retu

When you delete a user of a database under Ms Sql2005, prompt " database principal has schema in this database, cannot delete " error solution1, under the security-> architecture to see if there is no such user exists, if there is to deleteTry again under the user to see if you can delete the user, if not, use the following grammarRun the following SQL statementALTER AUTHORIZATION on SCHEMA::d b_owner to dbo; --and then manually delete it.Cannot drop the user because the selected user

, because he is Java Standard annotations. 3. Pre-/post-invocation Security with Spel There are four main: (1) @PreAuthorized: Based on the result of an expression, restricting methods are accessed before invoking the method. @PreAuthorize ("Hasrole (' Role_spitter ')")public void Addspittle (spittle spittle) {// ...} Users who have role Role_spitter can access the Addspittle method. @PreAuthorize ("(Hasrole (' Role_spitter ') and #spittle. Text.length () or Hasrole (' Role_premium '))public vo

Authenticationcredentialseverbeassignedtoxs$null BI The account is owns the business Intelligence schema included in the Oracle Sample Schemas. Pm The account is owns the Product Media schema included in the Oracle Sample Schemas. Ix The account this owns the information Transport schema

stream, the Readbuffer method causes the Ereaderror exception event. 6. Readcomponent method Statement: function Readcomponent (instance:tcomponent): tcomponent; The Readcomponent method reads the part specified by instance from the current stream, and the function returns the part that is read. Readcomponent creates a reader object and invokes its Readrootcomponent method when reading the instance and all the objects it owns. If the method insta

for database management. Oracle recommends that users design their own database management and security rights planning instead of simply using these predefined roles. In future releases, these roles may not be used as predefined roles.2. Delete_catalog_role, Execute_catalog_role, Select_catalog_roleThese roles are primarily used to access data dictionary views and packages.3. Exp_full_database, Imp_full_databaseThese two roles are used for the data Import Export tool.4. Aq_user_role, Aq_admini

supports the context management protocol.Class Threading. RlockThis class implements a Reentrant lock object. A reentrant lock must be released by the thread that requested it, and once a thread has a reentrant lock, the thread can request it again, noting that the number of times the lock must be requested corresponds to the number of times the lock was released.Note that Rlock is actually a factory function that returns an instance of the most efficient Rlock class version supported by the cu

used by only one thread at a time. Mutex: The critical section, the mutex, and the semaphore. Synchronized keywords : After compiling, the Monitorenter and monitorexit Two bytecode instructions are formed before and after the synchronization block. All two instructions require a parameter of a reference type to indicate the object to lock and unlock. If the object parameter is not explicitly specified, then the corresponding object instance or class object is taken as the lock object accor