C thread group interface, see L4::Thread_group for the C++ interface. More...

Collaboration diagram for Thread groups:

Functions
l4_msgtag_t	l4_thread_group_add (l4_cap_idx_t tg, l4_cap_idx_t thread) L4_NOTHROW
	Add thread to a thread group.
l4_msgtag_t	l4_thread_group_remove (l4_cap_idx_t tg, l4_cap_idx_t thread) L4_NOTHROW
	Remove thread from a thread group.

Detailed Description

C thread group interface, see L4::Thread_group for the C++ interface.

An L4 thread group is a collection of threads used as indirection for IPC gate and IRQ objects such that these objects can have multiple receivers, from which the kernel selects one according to a policy.

The primary use case for thread groups are multi-threaded servers and CPU core local IRQ / IPC delivery.

A thread can be bound to at most one thread group. Before binding a thread to a thread group, the thread must be bound to a task. All threads bound to the same thread group must belong to the same task.

Function Documentation

◆ l4_thread_group_add()

l4_msgtag_t l4_thread_group_add	(	l4_cap_idx_t	tg,
		l4_cap_idx_t	thread )

inline

Add thread to a thread group.

Parameters

tg	Thread group object.
thread	Thread to add to the thread group.

Definition at line 114 of file thread_group.h.

References L4_NOTHROW, and l4_utcb().

Here is the call graph for this function:

◆ l4_thread_group_remove()

l4_msgtag_t l4_thread_group_remove	(	l4_cap_idx_t	tg,
		l4_cap_idx_t	thread )