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Mach IPC presents itself in a few forms: message queues, lock-sets, and semaphores (more may be added in the future). All share one common charateristic: the capabilities presented by each are represented through a handle known as a Mach port. Specific rights represented in these Mach port capability handles allow the underlying IPC object to be used and manipulated in consistent ways.
Mach Message Queue Interface
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mach_msg - Send and/or receive a message from the target port.
mach_msg_overwrite - Send and/or receive messages with possible overwrite.
mach_msg_descriptor - Specifies an element of a complex IPC message.
mach_msg_header - Specifies the content of an IPC message header.
Mach Lock-Set Interface
lock_acquire - Acquire ownership a lock
lock_handoff - Hand-off ownership of a lock.
lock_handoff_accept - Accept lock ownership from a handoff.
lock_make_stable - Stabilize the state of the specified lock.
lock_release - Release ownership of a lock.
lock_set_create - Create a new lock set.
lock_set_destroy - Destroy a lock set and its associated locks.
lock_try - Attempt to acquire access rights to a lock.
Mach Semaphore Interface
semaphore_create - Create a new semaphore.
semaphore_destroy - Destroy a semaphore.
semaphore_signal - Increments the semaphore count.
semaphore_signal_all - Wake up all threads blocked on a semaphore.
semaphore_wait - Wait on the specified semaphore.
Mach Port Management Interface
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mach_port_allocate - Create caller-specified type of port right.
mach_port_allocate_full - Create a port right with full Mach port semantics.
mach_port_allocate_name - Create a port right with the caller-specified name.
mach_port_allocate_qos - Allocate a port with specified 'quality of service'.
mach_port_allocate_subsystem - Create a port right associated with the caller-specified subsystem.
mach_port_deallocate - Decrement the target port right's user reference count.
mach_port_destroy - Deallocate all port rights associated with specified name.
mach_port_extract_right - Remove the specified right from the target task and return it to the caller.
mach_port_get_attributes - Return information about target port as specified by the caller.
mach_port_get_refs - Return the current count of user references on the target port right.
mach_port_get_set_status - Return the port right names contained in the target port set.
mach_port_insert_right - Insert the specified port right into the target task.
mach_port_mod_refs - Modify the specified port right's count of user references.
mach_port_move_member - Move the specified receive right into or out of the specified port set.
mach_port_names - Return information about a task's port name space.
mach_port_request_notification - Request notification of the specified port event type.
mach_port_set_attributes - Set the target port's attributes.
mach_port_set_mscount - Change the target port's make-send count.
mach_port_set_seqno - Change the current value of the target port's sequence number.
mach_port_type - Return the characteristics of the target port name.
mach_reply_port - Allocate a new port and insert corresponding receive right in the calling task.
mach_subsystem_create - Used by a server to register information about an RPC subsystem with the kernel.
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Mach Port Data Structuresmach_port_limits - Specifies a port's resource and message queue limits.
mach_port_qos - Specifies a port's attributes with respect to 'Quality Of Service.'
mach_port_status - Used to present a port's current status with respect to various important attributes.
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Mach Port Notification Callbacksdo_mach_notify_dead_name - Handle the current instance of a dead-name notification.
do_mach_notify_no_senders - Handle the current instance of a no-more-senders notification.
do_mach_notify_port_deleted - Handle the current instance of a port-deleted notification.
do_mach_notify_port_destroyed - Handle the current instance of a port-destroyed notification.
do_mach_notify_send_once - Handle the current instance of a send-once notification.
notify_server - Detect and handle a kernel-generated IPC notification.
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