Sistemi operativi - Syscall pthread_attr_setdetachstate

Pthread_attr_setdetachstate

Name

pthread_attr_setdetachstate, pthread_attr_getdetachstate - set and get detachstate attribute

Synopsis

#include <pthread.h>
int pthread_attr_setdetachstate(pthread_attr_t *attr, int detachstate);
int pthread_attr_getdetachstate(const pthread_attr_t *attr, int *detachstate);

Description

The detachstate attribute controls whether the thread is created in a detached state. If the thread is created detached, then use of the ID of the newly created thread by the pthread_detach() or pthread_join() function is an error.

The pthread_attr_setdetachstate() and pthread_attr_getdetachstate(), respectively, set and get the detachstate attribute in the attr object. The detachstate can be set to either PTHREAD_CREATE_DETACHED or PTHREAD_CREATE_JOINABLE. A value of PTHREAD_CREATE_DETACHED causes all threads created with attr to be in the detached state, whereas using a value of PTHREAD_CREATE_JOINABLE causes all threads created with attr to be in the joinable state. The default value of the detachstate attribute is PTHREAD_CREATE_JOINABLE.

Return Value

Upon successful completion, pthread_attr_setdetachstate() and pthread_attr_getdetachstate() return a value of 0. Otherwise, an error number is returned to indicate the error. The pthread_attr_getdetachstate() function stores the value of the detachstate attribute in detachstate if successful.

Errors

The pthread_attr_setdetachstate() function will fail if:

• [EINVAL] The value of detachstate was not valid

These functions will not return an error code of [EINTR].

Examples

None.