read_cross_subsystem_buffer()

std::optional< std::span< const double > > MayaFlux::Core::SubsystemManager::read_cross_subsystem_buffer	(	SubsystemType	requesting_type,
		SubsystemType	target_type,
		uint32_t	channel
	)

Read data from another subsystem's buffers.

Parameters

requesting_type	SubsystemType making the data request
target_type	SubsystemType providing the data
channel	Channel index to read from

Returns

Read-only span if access allowed, nullopt otherwise

Enables controlled cross-subsystem data sharing with permission checking. Used for scenarios where one subsystem needs processed data from another.

Definition at line 270 of file SubsystemManager.cpp.

{
    std::shared_lock lock(m_mutex);
 
    if (m_subsystems.find(requesting_type) == m_subsystems.end()) {
        return std::nullopt;
    }
 
    if (!is_cross_access_allowed(requesting_type, target_type)) {
        return std::nullopt;
    }
 
    auto target = m_subsystems.find(target_type);
    if (target == m_subsystems.end() || !target->second) {
        return std::nullopt;
    }
 
    auto target_token = target->second->get_tokens();
 
    try {
        return m_buffer_manager->get_buffer_data(target_token.Buffer, channel);
    } catch (...) {
        return std::nullopt;
    }
}

References is_cross_access_allowed(), m_buffer_manager, m_mutex, and m_subsystems.

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