waiting thread until a condition has been occurred

Question

I want to wait one thread of 2 thread that executed in a Simultaneous simulator until a condition has been occurred, may be the condition occurred after 1000 or more cycles

Answer 1

Using Semaphore for signalling. Example (application clean exit) as below:

Declare in header

static sem_t semPrepareExit;            //declaration

In source (main thread);

sem_init(&semPrepareExit, 0, 0);        ///semaphore initialized
...
///now wait for the signal on the semaphore, to proceed hereforth
sem_post(&semPrepareExit);
/// cleanup ahead
...

In source, (spawned-thread);

...
sem_post(&semPrepareExit);

Now, as soon as you signal on the semaphore using "sem_post". The main-thread will receive the signal at the wait-node/point, and will proceed, there-forth.