thr_suspend(3C) immediately suspends the execution of the thread specified by target_thread. On successful return from thr_suspend(), the suspended thread is no longer executing.
Because thr_suspend()suspends the target thread with no regard to the locks that the thread might be holding, you must use thr_suspend() with extreme care. If the suspending thread calls a function that requires a lock held by the suspended target thread, deadlock will result.
#include <thread.h> int thr_suspend(thread_t tid);
After a thread is suspended, subsequent calls to thr_suspend() have no effect. Signals cannot awaken the suspended thread. The signals remain pending until the thread resumes execution.
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);
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.
tid cannot be found in the current process.