Pre-version of 4a-hal-manager

Pre-version of 4a-hal manager that uses app-fwk DynAPI
and app-controller.
Current version :
- Declare a new API for each HAL (each .json config file
is used to generate one app-controller API) at startup.
- Define verbs that will be provided by this API.
- Provide verb to list and get info of loaded API.

Change-Id: I7bb6e8b7539b1acd5556fd9275a1b536e129332d
Signed-off-by: Jonathan Aillet <jonathan.aillet@iot.bzh>

1 files changed, 239 insertions, 0 deletions

diff --git a/4a-hal/4a-hal-controllers/4a-hal-controllers-api-loader.c b/4a-hal/4a-hal-controllers/4a-hal-controllers-api-loader.c
new file mode 100644
index 0000000..3401c93
--- /dev/null
+++ b/4a-hal/4a-hal-controllers/4a-hal-controllers-api-loader.c
@@ -0,0 +1,239 @@
+/*
+ * Copyright (C) 2016 "IoT.bzh"
+ * Author Jonathan Aillet <jonathan.aillet@iot.bzh>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define _GNU_SOURCE
+
+#include <stdio.h>
+#include <stdbool.h>
+#include <string.h>
+
+#include <filescan-utils.h>
+#include <wrap-json.h>
+
+#include <ctl-config.h>
+
+#include "../4a-hal-utilities/4a-hal-utilities-verbs-loader.h"
+#include "../4a-hal-manager/4a-hal-manager-cb.h"
+
+#include "4a-hal-controllers-api-loader.h"
+
+// Default api to print log when apihandle not available
+afb_dynapi *AFB_default;
+
+/*******************************************************************************
+ *		Json parsing functions using app controller		       *
+ ******************************************************************************/
+
+// Config Section definition
+static CtlSectionT ctrlSections[] =
+{
+	[CTL_SECTION_PLUGIN]  = {.key="plugins" , .loadCB= PluginConfig},
+	[CTL_SECTION_ONLOAD]  = {.key="onload"  , .loadCB= OnloadConfig},
+	[CTL_SECTION_CONTROL] = {.key="controls", .loadCB= ControlConfig},
+	[CTL_SECTION_EVENT]   = {.key="events"  , .loadCB= EventConfig},
+
+	[CTL_SECTION_ENDTAG]  = {.key=NULL}
+};
+
+/*******************************************************************************
+ *		Dynamic HAL verbs' functions				       *
+ ******************************************************************************/
+
+// Every HAL export the same API & Interface Mapping from SndCard to AudioLogic is done through alsaHalSndCardT
+static struct HalUtlApiVerb CtlHalDynApiStaticVerbs[] =
+{
+	/* VERB'S NAME			FUNCTION TO CALL		SHORT DESCRIPTION */
+	{ .verb = "ping",		.callback = HalMgrPing,		.info = "Ping test for DynApi"},
+	{ .verb = NULL }		// Marker for end of the array
+};
+
+/*******************************************************************************
+ *		Dynamic API functions for app controller		       *
+ *		TODO JAI : Use API-V3 instead of API-PRE-V3		       *
+ ******************************************************************************/
+
+static int HalCtlsInitOneApi(afb_dynapi *apiHandle)
+{
+	int apiMetadataUnpackErr, apiHalmetadataUnpackErr;
+
+	json_object *apiMetadata, *apiHalmetadata;
+
+	CtlConfigT *ctrlConfig;
+	struct SpecificHalData *currentCtlHalData;
+
+	if(! apiHandle)
+		return -1;
+
+	// Hugely hack to make all V2 AFB_DEBUG to work in fileutils
+	AFB_default = apiHandle;
+
+	// Retrieve section config from api handle
+	ctrlConfig = (CtlConfigT *) afb_dynapi_get_userdata(apiHandle);
+	if(! ctrlConfig)
+		return -2;
+
+	currentCtlHalData = ctrlConfig->external;
+	if(! currentCtlHalData)
+		return -3;
+
+	// Fill SpecificHalDatadata structure
+	currentCtlHalData->internal = true;
+	currentCtlHalData->status = HAL_STATUS_UNAVAILABLE;
+
+	if(! json_object_object_get_ex(ctrlConfig->configJ, "metadata", &apiMetadata))
+		return -4;
+
+	if(! json_object_object_get_ex(ctrlConfig->configJ, "hal-metadata", &apiHalmetadata))
+		return -5;
+
+	apiMetadataUnpackErr = wrap_json_unpack(apiMetadata, "{s:s s?:s s?:s s?:o s?:o !}",
+						"uid", NULL,
+						"version", &currentCtlHalData->version,
+						"api", &currentCtlHalData->name,
+						"info", NULL,
+						"require", NULL);
+	if(apiMetadataUnpackErr)
+		return -6;
+
+	apiHalmetadataUnpackErr = wrap_json_unpack(apiHalmetadata, "{s:s s:s s:s !}",
+						   "sndcard", &currentCtlHalData->sndCard,
+						   "author", &currentCtlHalData->author,
+						   "date", &currentCtlHalData->date);
+	if(apiHalmetadataUnpackErr)
+		return -7;
+
+	currentCtlHalData->apiHandle = apiHandle;
+	currentCtlHalData->ctrlConfig = ctrlConfig;
+
+	// TODO JAI: Search for hw sndCard
+	// TODO JAI: Update alsa command of HalCtl to use alsa-softmixer/alsa-core data
+	// TODO JAI: handle refresh of hal status using /dev/snd/byId (or /dev/snd/byId)
+
+	return CtlConfigExec(apiHandle, ctrlConfig);
+}
+
+static int HalCtlsLoadOneApi(void *cbdata, afb_dynapi *apiHandle)
+{
+	int err;
+	CtlConfigT *ctrlConfig;
+
+	if(! cbdata || ! apiHandle )
+		return -1;
+
+	ctrlConfig = (CtlConfigT*) cbdata;
+
+	// Save closure as api's data context
+	afb_dynapi_set_userdata(apiHandle, ctrlConfig);
+
+	// Add static controls verbs
+	if(HalUtlLoadStaticVerbs(apiHandle, CtlHalDynApiStaticVerbs)) {
+		AFB_DYNAPI_ERROR(apiHandle, "%s : load Section : fail to register static V2 verbs", __func__);
+		return 1;
+	}
+
+	// Load section for corresponding Api
+	err = CtlLoadSections(apiHandle, ctrlConfig, ctrlSections);
+
+	// Declare an event manager for this Api
+	afb_dynapi_on_event(apiHandle, CtrlDispatchApiEvent);
+
+	// Init Api function (does not receive user closure ???)
+	afb_dynapi_on_init(apiHandle, HalCtlsInitOneApi);
+
+	afb_dynapi_seal(apiHandle);
+
+	return err;
+}
+
+int HalCtlsCreateApi(afb_dynapi *apiHandle, char *path, struct HalMgrData *HalMgrGlobalData)
+{
+	CtlConfigT *ctrlConfig;
+	struct SpecificHalData *currentCtlHalData;
+
+	if(! apiHandle || ! path || ! HalMgrGlobalData)
+		return -1;
+
+	// Create one Api per file
+	ctrlConfig = CtlLoadMetaData(apiHandle, path);
+	if(! ctrlConfig) {
+		AFB_DYNAPI_ERROR(apiHandle, "%s: No valid control config file in:\n-- %s", __func__, path);
+		return -2;
+	}
+
+	if(! ctrlConfig->api) {
+		AFB_DYNAPI_ERROR(apiHandle, "%s: API Missing from metadata in:\n-- %s", __func__, path);
+		return -3;
+	}
+
+	currentCtlHalData = HalUtlAddHalApiToHalList(HalMgrGlobalData);
+	if(! currentCtlHalData)
+		return -4;
+
+	ctrlConfig->external = (void *) currentCtlHalData;
+
+	// Create one API (Pre-V3 return code ToBeChanged)
+	return afb_dynapi_new_api(apiHandle, ctrlConfig->api, ctrlConfig->info, 1, HalCtlsLoadOneApi, ctrlConfig);
+}
+
+int HalCtlsCreateAllApi(afb_dynapi *apiHandle, struct HalMgrData *HalMgrGlobalData)
+{
+	int index, err, status;
+	char *dirList, *fileName, *fullPath;
+	char filePath[CONTROL_MAXPATH_LEN];
+
+	filePath[CONTROL_MAXPATH_LEN - 1] = '\0';
+
+	json_object *configJ, *entryJ;
+
+	if(! apiHandle || ! HalMgrGlobalData)
+		return -1;
+
+	// Hugely hack to make all V2 AFB_DEBUG to work in fileutils
+	AFB_default = apiHandle;
+
+	AFB_DYNAPI_NOTICE(apiHandle, "In %s", __func__);
+
+	dirList = getenv("CONTROL_CONFIG_PATH");
+	if(! dirList)
+		dirList = CONTROL_CONFIG_PATH;
+
+	configJ = CtlConfigScan(dirList, "4a");
+	if(! configJ) {
+		AFB_DYNAPI_ERROR(apiHandle, "%s: No 4a*.json config file(s) found in %s ", __func__, dirList);
+		return -2;
+	}
+
+	// We load 1st file others are just warnings
+	for(index = 0; index < json_object_array_length(configJ); index++) {
+		entryJ = json_object_array_get_idx(configJ, index);
+
+		err = wrap_json_unpack(entryJ, "{s:s, s:s !}", "fullpath", &fullPath, "filename", &fileName);
+		if(err) {
+			AFB_DYNAPI_ERROR(apiHandle, "%s: HOOPs invalid JSON entry = %s", __func__, json_object_get_string(entryJ));
+			return -1;
+		}
+
+		strncpy(filePath, fullPath, sizeof(filePath) - 1);
+		strncat(filePath, "/", sizeof(filePath));
+		strncat(filePath, fileName, sizeof(filePath));
+
+		if(HalCtlsCreateApi(apiHandle, filePath, HalMgrGlobalData) < 0)
+			status--;
+	}
+
+	return status;
+}
\ No newline at end of file