Unique Solaris Threads Functions

• Suspend Thread Execution

• Continue a Suspended Thread

Suspend Thread Execution

thr_suspend(3THR)

thr_suspend(3THR) immediately suspends the execution of the thread specified by target_thread. On successful return from thr_suspend(), the suspended thread is no longer executing.

Once a thread is suspended, subsequent calls to thr_suspend() have no effect. Signals cannot awaken the suspended thread; they remain pending until the thread resumes execution.

#include <thread.h>

int thr_suspend(thread_t tid);

In the following synopsis, pthread_t tid as defined in pthreads is the same as thread_t tid in Solaris threads. tid values can be used interchangeably either by assignment or through the use of casts.

thread_t tid; /* tid from thr_create() */

/* pthreads equivalent of Solaris tid from thread created */
/* with pthread_create() */
pthread_t ptid;	

int ret;

ret = thr_suspend(tid);

/* using pthreads ID variable with a cast */
ret = thr_suspend((thread_t) ptid);	

Return Values

thr_suspend() returns zero after completing successfully. Any other return value indicates that an error occurred. When the following condition occurs, thr_suspend() fails and returns the corresponding value.

ESRCH

tid cannot be found in the current process.

Continue a Suspended Thread

thr_continue(3THR)

thr_continue(3THR) resumes the execution of a suspended thread. Once a suspended thread is continued, subsequent calls to thr_continue() have no effect.

#include <thread.h>

int thr_continue(thread_t tid);

A suspended thread will not be awakened by a signal. The signal stays pending until the execution of the thread is resumed by thr_continue().

pthread_t tid as defined in pthreads is the same as thread_t tid in Solaris threads. tid values can be used interchangeably either by assignment or through the use of casts.

thread_t tid; /* tid from thr_create()*/

/* pthreads equivalent of Solaris tid from thread created */
/* with pthread_create()*/
pthread_t ptid;	

int ret;

ret = thr_continue(tid);

/* using pthreads ID variable with a cast */
ret = thr_continue((thread_t) ptid)	

Return Values

thr_continue() returns zero after completing successfully. Any other return value indicates that an error occurred. When the following condition occurs, thr_continue() fails and returns the corresponding value.

ESRCH

tid cannot be found in the current process.