rfnoc: Add block registry/factory and make_args

- noc_block_base now has a ctor defined
- The registry stores factory functions to the individual Noc-Block
  implementations

1 files changed, 88 insertions, 0 deletions

diff --git a/host/lib/rfnoc/registry_factory.cpp b/host/lib/rfnoc/registry_factory.cpp
new file mode 100644
index 000000000..cf7b897f7
--- /dev/null
+++ b/host/lib/rfnoc/registry_factory.cpp
@@ -0,0 +1,88 @@
+//
+// Copyright 2019 Ettus Research, a National Instruments Brand
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
+
+#include <uhd/exception.hpp>
+#include <uhd/rfnoc/registry.hpp>
+#include <uhd/utils/static.hpp>
+#include <uhdlib/rfnoc/factory.hpp>
+#include <unordered_map>
+#include <iomanip>
+#include <iostream>
+#include <sstream>
+
+using namespace uhd::rfnoc;
+
+///////////////////////////////////////////////////////////////////////////////
+// There are two registries:
+// - The "direct" registry, which is for blocks that do not have a block
+//   descriptor file
+// - The "descriptor" registry, which is for blocks that *do* have a block
+//   descriptor file
+//
+// This is the direct registry:
+using block_direct_reg_t = std::unordered_map<noc_block_base::noc_id_t,
+    std::tuple<std::string /* block_name */,
+        registry::factory_t>>;
+UHD_SINGLETON_FCN(block_direct_reg_t, get_direct_block_registry);
+//
+// This is the descriptor registry:
+using block_descriptor_reg_t =
+    std::unordered_map<std::string /* block_key */, registry::factory_t>;
+UHD_SINGLETON_FCN(block_descriptor_reg_t, get_descriptor_block_registry);
+///////////////////////////////////////////////////////////////////////////////
+
+/******************************************************************************
+ * Registry functions
+ *
+ * Note: Don't use UHD_LOG_*, since all of this can be executed in a static
+ * fashion.
+ *****************************************************************************/
+void registry::register_block_direct(noc_block_base::noc_id_t noc_id,
+    const std::string& block_name,
+    factory_t factory_fn)
+{
+    if (get_direct_block_registry().count(noc_id)) {
+        std::cerr
+            << "[REGISTRY] WARNING: Attempting to overwrite previously registered RFNoC "
+               "block with Noc-ID 0x"
+            << std::hex << noc_id << std::dec << std::endl;
+        return;
+    }
+    get_direct_block_registry().emplace(
+        noc_id, std::make_tuple(block_name, std::move(factory_fn)));
+}
+
+void registry::register_block_descriptor(
+    const std::string& block_key, factory_t factory_fn)
+{
+    if (get_descriptor_block_registry().count(block_key)) {
+        std::cerr << "WARNING: Attempting to overwriting previously registered RFNoC "
+                     "block with block key"
+                  << block_key << std::endl;
+        return;
+    }
+    get_descriptor_block_registry().emplace(block_key, std::move(factory_fn));
+}
+
+/******************************************************************************
+ * Factory functions
+ *****************************************************************************/
+std::pair<registry::factory_t, std::string> factory::get_block_factory(
+    noc_block_base::noc_id_t noc_id)
+{
+    // First, check the descriptor registry
+    // FIXME TODO
+
+    // Second, check the direct registry
+    if (!get_direct_block_registry().count(noc_id)) {
+        UHD_LOG_WARNING("RFNOC::BLOCK_FACTORY",
+            "Could not find block with Noc-ID "
+                << std::hex << std::setw(sizeof(noc_block_base::noc_id_t) * 2) << noc_id);
+        throw uhd::key_error("Block not found!");
+    }
+    auto& block_info = get_direct_block_registry().at(noc_id);
+    return {std::get<1>(block_info), std::get<0>(block_info)};
+}