In computer operating systems, a process (or task) may wait on another process to complete its execution. … The parent process may then issue a wait system call, which suspends the execution of the parent process while the child executes.
Ho ema () ho etsa eng?
Mosebetsi oa ho emela () o tla emisa ts'ebetso ea mohala oa mohala ho fihlela tlhaiso-leseling ea boemo ba e 'ngoe ea lits'ebetso tsa eona tsa bana e felisitsoeng e fumaneha, kapa ho fihlela ho fana ka lets'oao leo ketso ea lona e leng ho etsa tšebetso ea ho ts'oara mats'oao kapa ho emisa ts'ebetso.
How does wait work?
The wait() system call suspends execution of the current process until one of its children terminates. The call wait(&status) is equivalent to: waitpid(-1, &status, 0); The waitpid() system call suspends execution of the current process until a child specified by pid argument has changed state.
Phapano ke efe lipakeng tsa waitpid le waitpid?
The mosebetsi oa ho emela o ka thibela motho ea letsetsang ho fihlela ts'ebetso ea ngoana e fela, athe waitpid e na le khetho e e thibelang ho thibela. Mosebetsi oa waitpid ha o emele ngoana hore a qetelle pele; e na le likhetho tse 'maloa tse laolang hore na e emela ts'ebetso efe.
Ho boleloa eng ka mohala oa sistimi?
Ho khomphutha, mohala oa sistimi (o atisang ho khutsufatsoa ho syscall) ke mokhoa oa lenaneo oo lenaneo la khomphutha le kopang ts'ebeletso ho tsoa kernel ea sistimi e sebetsang eo e etsoang ho eona.. … Mehala ea sistimi e fana ka khokahano ea bohlokoa lipakeng tsa ts'ebetso le sistimi e sebetsang.
Pid_t ke eng?
pid_t mofuta oa data e emetse ho tsebahatsa tshebetso mme e sebedisetswa ho emela di-id tsa tshebetso. Nako le nako, re batla ho phatlalatsa phetoho e tla sebetsana le li-id tsa ts'ebetso tseo re ka li sebelisang pid_t mofuta oa data. Mofuta oa data ea pid_t ke mofuta oa nomoro e saennoeng (e saenneng int kapa re ka re int).
How does Waitpid work?
If pid is greater than 0, waitpid() waits for termination of the specific child whose process ID is equal to pid. If pid is equal to zero, waitpid() waits for termination of any child whose process group ID is equal to that of the caller.
Ho robala ke eng () ho C?
The function sleep gives a simple way to make the program wait for a short interval. … The sleep function waits for seconds seconds or until a signal is delivered, whichever happens first. If sleep returns because the requested interval is over, it returns a value of zero.
Wexittatus ke eng?
Macro ena e botsa boemo ba ho felisoa ha ngoana bo fanoeng ke mesebetsi ea ho leta le ea waitpid. Haeba macro ea WIFEXITED e bontša hore ts'ebetso ea ngoana e tsoile ka tloaelo, WEXITSTATUS macro e khutlisa khoutu ea ho tsoa e boletsoeng ke ts'ebetso ea ngoana.
Ho emela eng Null?
1 Karabo. ema(NULL) e tla thibela tšebetso ea motsoali ho fihlela ngoana ofe kapa ofe oa eona a qetile. Haeba ngoana a khaotsa pele ts'ebetso ea motsoali e fihla ho emela (NULL) joale ts'ebetso ea ngoana e fetohela ts'ebetsong ea zombie ho fihlela motsoali oa hae a e emela ebe e lokolloa mohopolong.
What happens when a process terminates but its parent does not wait for it?
Zombie process is that process which has terminated but whose process control block has not been cleaned up from main memory because the parent process was not waiting for the child.
Ho ema ke eng () Java?
Ka mantsoe a bonolo feela, wait() ke mokhoa oa mohlala o sebelisoang ho hokahanya likhoele. E ka bitsoa ntho efe kapa efe, joalo ka ha e hlalosoa hantle ho java. lang. Ntho, empa e ka bitsoa feela ho tsoa bolokong bo hokahaneng. E lokolla senotlolo holim'a ntho e le hore khoele e 'ngoe e ka tlolela ka hare 'me e fumane senotlolo.