Prosody application note: simultaneous use of Prosody by multiple processes

Multiple processes can use the Prosody API simultaneously. If two processes never use the same Prosody processor module, then they will be unaware of each other (unless, of course they interact through other shared resources, such as timeslots on the H.100 bus), because Prosody has no resources shared between modules.

If two processes do access the same module:

• each process must seperately open the module
• API handles for objects obtained by one process must not be used by the other process
• care must be taken that only one of the processes outputs to a given TDM Tx timeslot

Module settings that are not shared

Settings on this list are private to each process, so the setting made by one process for a module does not affect the setting for other processes using the same module.

• All parameter adjustments performed on individual channels.
• Input component frequencies, tones, and tone sets.
• Input call progess tones.
• Output component frequencies and tones.
• Parameter adjustments controlled by sm_adjust_input_tone_set().
• Parameter adjustments controlled by sm_adjust_catsig_module_params().

Note that all the above resources are kept in the API library, so, in addition to permitting different processes to have different configurations, it means that generally these items are only limited by the size of the application's memory.

Document reference: AN 1399