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/*
* Copyright © 2010-2011 Intel Corporation
* Copyright © 2008-2011 Kristian Høgsberg
* Copyright © 2013 TOYOTA MOTOR CORPORATION.
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee, provided
* that the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of the copyright holders not be used in
* advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. The copyright holders make
* no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/**
* @brief Weston(Wayland) Plugin Loader
* @brief Load the Weston plugins, because plugin loader of main body of Weston
* @brief cannot use other plugin functions by a other plugin.
*
* @date Feb-08-2013
*/
#define _GNU_SOURCE
#include <stdlib.h>
#include <stdio.h>
#include <stdbool.h>
#include <string.h>
#include <unistd.h>
#include <dlfcn.h>
#include <sys/time.h>
#include <time.h>
#include <weston/compositor.h>
#include "ico_ivi_common.h"
/* This function is called from the main body of Weston and initializes this module.*/
int module_init(struct weston_compositor *ec);
/* Internal function to load one plugin. */
static void load_module(struct weston_compositor *ec, const char *path, const char *entry);
/* Static valiables */
static char *moddir = NULL; /* Answer back from configuration */
static char *modules = NULL; /* Answer back from configuration */
static int debug_level = 3; /* Debug Level */
/* Configuration key */
static const struct config_key plugin_config_keys[] = {
{ "moddir", CONFIG_KEY_STRING, &moddir },
{ "modules", CONFIG_KEY_STRING, &modules },
};
static const struct config_section conf_plugin[] = {
{ "plugin", plugin_config_keys, ARRAY_LENGTH(plugin_config_keys) },
};
static const struct config_key debug_config_keys[] = {
{ "ivi_debug", CONFIG_KEY_INTEGER, &debug_level },
};
static const struct config_section conf_debug[] = {
{ "debug", debug_config_keys, ARRAY_LENGTH(debug_config_keys) },
};
/*--------------------------------------------------------------------------*/
/**
* @brief ico_ivi_debuglevel: answer debug output level.
*
* @param none
* @return debug output level
* @retval 0 No debug output
* @retval 1 Only error output
* @retval 2 Error and information output
* @retval 3 All output with debug write
*/
/*--------------------------------------------------------------------------*/
int
ico_ivi_debuglevel(void)
{
return debug_level;
}
/*--------------------------------------------------------------------------*/
/**
* @brief load_module: load one plugin module.
*
* @param[in] ec weston compositor. (from weston)
* @param[in] path file path of plugin module.
* @param[in] entry entry function name of plugin module.
* @return none
*/
/*--------------------------------------------------------------------------*/
static void
load_module(struct weston_compositor *ec, const char *path, const char *entry)
{
void *module; /* module informations (dlopen) */
int (*init)(struct weston_compositor *ec);
/* enter function of loaded plugin */
uifw_info("ico_plugin_loader: Load(path=%s entry=%s)", path, entry);
/* get module informations */
module = dlopen(path, RTLD_NOW | RTLD_NOLOAD);
if (module) {
/* plugin module already loaded */
dlclose(module);
uifw_error("ico_plugin_loader: Load Error(%s already loaded)", path);
return;
}
/* load plugin module */
uifw_trace("ico_plugin_loader: %s loading", path);
module = dlopen(path, RTLD_NOW | RTLD_GLOBAL);
if (! module) {
/* plugin module dose not exist */
uifw_error("ico_plugin_loader: Load Error(%s error<%s>)", path, dlerror());
return;
}
/* find initialize function */
if (entry) {
init = dlsym(module, entry);
if (! init) {
uifw_error("ico_plugin_loader: Load Error(%s, function %s dose not exist(%s))",
path, entry, dlerror());
}
else {
/* call initialize function */
uifw_trace("ico_plugin_loader: Call %s:%s(%08x)", path, entry, (int)init);
init(ec);
uifw_info("ico_plugin_loader: %s Loaded", path);
}
}
}
/*--------------------------------------------------------------------------*/
/**
* @brief module_init: initialize function of ico_plugin_loader
* called from weston compositor.
*
* @param[in] ec weston compositor(from weston)
* @return result
* @retval 0 sccess
* @retval -1 error
*/
/*--------------------------------------------------------------------------*/
WL_EXPORT int
module_init(struct weston_compositor *ec)
{
int config_fd;
char *p;
char *end;
char buffer[256];
uifw_info("ico_plugin_loader: Enter(module_init)");
/* get plugin module name from config file(weston_ivi_plugin.ini) */
config_fd = open_config_file(ICO_IVI_PLUGIN_CONFIG);
parse_config_file(config_fd, conf_plugin, ARRAY_LENGTH(conf_plugin), NULL);
parse_config_file(config_fd, conf_debug, ARRAY_LENGTH(conf_debug), NULL);
close(config_fd);
if (modules == NULL) {
uifw_error("ico_plugin_loader: Leave(No Plugin in config)");
return -1;
}
moddir = getenv("WESTON_IVI_PLUGIN_DIR");
p = modules;
while (*p) {
end = strchrnul(p, ',');
if (*p == '/') {
snprintf(buffer, sizeof(buffer), "%.*s", (int) (end - p), p);
}
else if (moddir) {
snprintf(buffer, sizeof(buffer), "%s/%.*s", moddir, (int) (end - p), p);
}
else {
snprintf(buffer, sizeof(buffer), "%s/%.*s", MODULEDIR, (int) (end - p), p);
}
load_module(ec, buffer, "module_init");
p = end;
while (*p == ',') {
p++;
}
}
uifw_info("ico_plugin_loader: Leave(module_init)");
return 0;
}
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