Você procurou por: semaphore (Tcheco - Inglês)

sem is not a valid semaphore.
sem is not a valid semaphore.

the semaphore name is removed immediately.
the semaphore name is removed immediately.

there is no semaphore with the given name.
there is no semaphore with the given name.

sem_getvalue - get the value of a semaphore
sem_getvalue - get the value of a semaphore

the caller does not have permission to unlink this semaphore.
the caller does not have permission to unlink this semaphore.

the call timed out before the semaphore could be locked.
the call timed out before the semaphore could be locked.

the value argument specifies the initial value for the semaphore.
the value argument specifies the initial value for the semaphore.

the value argument specifies the initial value for the new semaphore.
the value argument specifies the initial value for the new semaphore.

of course, not waiting for the result needs queue and semaphore.
of course, not waiting for the result needs queue and semaphore.

a semaphore file or files are created in the directory containing the rcs file.
a semaphore file or files are created in the directory containing the rcs file.

the semaphore is destroyed once all other processes that have the semaphore open close it.
the semaphore is destroyed once all other processes that have the semaphore open close it.

sem_open() creates a new posix semaphore or opens an existing semaphore.
sem_open() creates a new posix semaphore or opens an existing semaphore.

both read and write permission should be granted to each class of user that will access the semaphore.
both read and write permission should be granted to each class of user that will access the semaphore.

the o_creat flag was not specified in oflag, and no semaphore with this name exists.
the o_creat flag was not specified in oflag and no semaphore with this name exists; or, o_creat was specified, but name wasn't well formed.

the value of the semaphore may already have changed by the time sem_getvalue() returns.
the value of the semaphore may already have changed by the time sem_getvalue() returns.

if o_creat is specified in oflag, then the semaphore is created if it does not already exist.
if o_creat is specified in oflag, then the semaphore is created if it does not already exist.

in this case, you can create a semaphore with a counter set to zero, and up it when things are ready for drawing.
in this case, you can create a semaphore with a counter set to zero, and up it when things are ready for drawing.

both o_creat and o_excl were specified in oflag, but a semaphore with this name already exists.
both o_creat and o_excl were specified in oflag, but a semaphore with this name already exists.

an unnamed semaphore should be destroyed with sem_destroy() before the memory in which it is located is deallocated.
an unnamed semaphore should be destroyed with sem_destroy() before the memory in which it is located is deallocated.

to be more precise, i takes more than single mutex per thread as there`s a queue and it really needs a semaphore.
to be more precise, i takes more than single mutex per thread as there`s a queue and it really needs a semaphore.