Function initInstanceTable

layersvt/vk_layer_table.cpp:104–123

Various dispatchable objects will use the same underlying dispatch table if they * are created from that "parent" object. Thus use pointer to dispatch table * as the key to these table maps. * Instance -> PhysicalDevice * Device -> CommandBuffer or Queue * If use the object themselves as key to map then implies Create entrypoints have to be intercepted * and a new key inserted into map

 * If use the object themselves as key to map then implies Create entrypoints have to be intercepted
 * and a new key inserted into map */
VkuInstanceDispatchTable *initInstanceTable(VkInstance instance, const PFN_vkGetInstanceProcAddr gpa, instance_table_map &map) {
    VkuInstanceDispatchTable *pTable;
    dispatch_key key = get_dispatch_key(instance);
    instance_table_map::const_iterator it = map.find((void *)key);

    if (it == map.end()) {
        pTable = new VkuInstanceDispatchTable;
        map[(void *)key] = pTable;
    } else {
        return it->second;
    }

    vkuInitInstanceDispatchTable(instance, pTable, gpa);

    // Setup func pointers that are required but not externally exposed.  These won't be added to the instance dispatch table by
    // default.
    pTable->GetPhysicalDeviceProcAddr = (PFN_GetPhysicalDeviceProcAddr)gpa(instance, "vk_layerGetPhysicalDeviceProcAddr");

    return pTable;
}

VkuInstanceDispatchTable *initInstanceTable(VkInstance instance, const PFN_vkGetInstanceProcAddr gpa) {
    return initInstanceTable(instance, gpa, tableInstanceMap);