POSIXIt defines the following constant and functions:
error- Raised on thread-specific errors.
LockType- This is the type of lock objects.
start_new_thread(function, args[, kwargs])
- Start a new thread. The thread executes the function functionwith the argument list args (which must be a tuple). The
optional kwargs argument specifies a dictionary of keyword
arguments. When the
function returns, the thread silently exits. When the function
terminates with an unhandled exception, a stack trace is printed and
then the thread exits (but other threads continue to run).
exit()
- Raise the SystemExit exception. When not caught, this
will cause the thread to exit silently.
exit_thread()
- 1.5.2 Use exit().This is an obsolete synonym for exit().
allocate_lock()
- Return a new lock object. Methods of locks are described below. The
lock is initially unlocked.
get_ident()
- Return the `thread identifier' of the current thread. This is a
nonzero integer. Its value has no direct meaning; it is intended as a
magic cookie to be used e.g. to index a dictionary of thread-specific
data. Thread identifiers may be recycled when a thread exits and
another thread is created.
Lock objects have the following methods:
lockacquire([waitflag])
- Without the optional argument, this method acquires the lock
unconditionally, if necessary waiting until it is released by another
thread (only one thread at a time can acquire a lock --- that's their
reason for existence), and returns
None. If the integer
waitflag argument is present, the action depends on its
value: if it is zero, the lock is only acquired if it can be acquired
immediately without waiting, while if it is nonzero, the lock is
acquired unconditionally as before. If an argument is present, the
return value is 1 if the lock is acquired successfully,
0 if not.
lockrelease()
- Releases the lock. The lock must have been acquired earlier, but not
necessarily by the same thread.
locklocked()
- Return the status of the lock:
1 if it has been acquired by
some thread, 0 if not.
Caveats:
