Implement the gRPC APIs for the job stats

Add the job stats APIs in the rdc_api_service at the server side rdcd
Add the job stats APIs for the RdcStandaloneHandler at the client side
Make the load librdc.so and librdc_client.so thread safe.
Impelement async update all fields in RdcEmbeddedHandler.

Change-Id: I659d91efb32d1094d3b7f0f2cec39518cd7336ce

rdc_libs/bootstrap/src/RdcBootStrap.cc

@@ -26,19 +26,17 @@ THE SOFTWARE.
 #include "rdc_lib/RdcHandler.h"
 #include "rdc_lib/RdcLogger.h"
 #include "rdc_lib/rdc_common.h"
+#include "rdc_lib/RdcLibraryLoader.h"
 
-static void* libHandler = nullptr;
+
+static amd::rdc::RdcLibraryLoader rdc_lib_loader;
 
 rdc_status_t rdc_init(uint64_t) {
        return RDC_ST_OK;
 }
 
 rdc_status_t rdc_shutdown() {
-        if (libHandler) {
-            dlclose(libHandler);
-            libHandler = nullptr;
-        }
-        return RDC_ST_OK;
+       return rdc_lib_loader.unload();
 }
 
 rdc_status_t rdc_connect(const char* ipAddress,
@@ -46,24 +44,17 @@ rdc_status_t rdc_connect(const char* ipAddress,
                 const char* root_ca, const char* client_cert,
                 const char* client_key ) {
         amd::rdc::RdcHandler* (*func_make_handler)(const char*,
-        const char*, const char*, const char*);
+        const char*, const char*, const char*) = nullptr;
 
         if (!ipAddress || !p_rdc_handle) {
                 return RDC_ST_FAIL_LOAD_MODULE;
         }
 
-        if (!libHandler) {
-             libHandler = dlopen("librdc_client.so", RTLD_LAZY);
-        }
-
-        if (!libHandler) {
-                return RDC_ST_FAIL_LOAD_MODULE;
-        }
-
-        *reinterpret_cast<void**>(&func_make_handler) =
-                dlsym(libHandler, "make_handler");
-        if (!func_make_handler) {
-                return RDC_ST_FAIL_LOAD_MODULE;
+        rdc_status_t status = rdc_lib_loader.load("librdc_client.so",
+                &func_make_handler);
+        if (status != RDC_ST_OK) {
+                *p_rdc_handle = nullptr;
+                return status;
         }
 
         *p_rdc_handle = static_cast<rdc_handle_t>
@@ -83,31 +74,17 @@ rdc_status_t rdc_disconnect(rdc_handle_t p_rdc_handle) {
 
 rdc_status_t rdc_start_embedded(rdc_operation_mode_t op_mode,
                 rdc_handle_t* p_rdc_handle ) {
-        amd::rdc::RdcHandler* (*func_make_handler)(rdc_operation_mode_t);
-        char *error;
+        amd::rdc::RdcHandler* (*func_make_handler)(rdc_operation_mode_t)
+                                = nullptr;
         if (!p_rdc_handle) {
                 return RDC_ST_FAIL_LOAD_MODULE;
         }
 
-        dlerror();
-
-        if (!libHandler) {
-             libHandler = dlopen("librdc.so", RTLD_LAZY);
-        }
-
-        if (!libHandler) {
-                error = dlerror();
-                RDC_LOG(RDC_ERROR, "Fail to open librdc.so: " << error);
-                return RDC_ST_FAIL_LOAD_MODULE;
-        }
-
-        *reinterpret_cast<void**>(&func_make_handler) =
-                dlsym(libHandler, "make_handler");
-        if (!func_make_handler) {
-                error = dlerror();
-                RDC_LOG(RDC_ERROR,
-                "Fail to find function make_handler:" << error);
-                return RDC_ST_FAIL_LOAD_MODULE;
+        rdc_status_t status = rdc_lib_loader.load("librdc.so",
+                &func_make_handler);
+        if (status != RDC_ST_OK) {
+                *p_rdc_handle = nullptr;
+                return status;
         }
 
         *p_rdc_handle = static_cast<rdc_handle_t>

rdc_libs/bootstrap/src/RdcLibraryLoader.cc

@@ -0,0 +1,45 @@
+/*
+Copyright (c) 2020 - present Advanced Micro Devices, Inc. All rights reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+#include "rdc_lib/RdcLibraryLoader.h"
+
+namespace amd {
+namespace rdc {
+
+RdcLibraryLoader::RdcLibraryLoader(): libHandler_(nullptr) {
+}
+
+rdc_status_t RdcLibraryLoader::unload() {
+        std::lock_guard<std::mutex> guard(library_mutex_);
+        if (libHandler_) {
+            dlclose(libHandler_);
+            libHandler_ = nullptr;
+        }
+        return RDC_ST_OK;
+}
+
+RdcLibraryLoader::~RdcLibraryLoader() {
+        unload();
+}
+
+}  // namespace rdc
+}  // namespace amd