2 Oct
2010
2 Oct
'10
3:24 a.m.
On 10/02/10 03:13, Ivica Ico Bukvic wrote:
Many thanks for the clarification Robin, really
appreciate it!
One more thing I realized, isn't the secondary thread effectively blocking the lock
on the main thread because the mutex_lock is placed before the cond call or is this the
right way to do it? Namely, should secondary thead have the following structure:
While loop {
mutex_lock
state cond <--this is where the thread supposedly waits (does this have to be
"while" loop or a simple if will do as is the case in my code?)
do something
mutex_unlock
}
Thread exit
This looks about right. You need to aquire the lock before calling
pthread_cond_wait() which then release the lock, waits for the condition
to be signaled and acquires the lock again.
Read the first paragraph of `man 3 pthread_cond_wait`
..what could however happen is that pthread_cond_wait() returns with an
error, without acquiring the lock!
HTH,
robin