static int start(void *d) {
plugin_data_t *data = d;
cp_extension_t **exts;
exts = cp_get_extensions_info(data->ctx, "symuser.strings", NULL, NULL);
if (exts != NULL && exts[0] != NULL) {
const char *symname;
symname = cp_lookup_cfg_value(exts[0]->configuration, "@string-symbol");
if (symname != NULL) {
data->str = cp_resolve_symbol(data->ctx, exts[0]->plugin->identifier, symname, NULL);
if (data->str == NULL) {
cp_log(data->ctx, CP_LOG_ERROR, "Could not resolve symbol specified by extension.");
}
} else {
cp_log(data->ctx, CP_LOG_ERROR, "No string-symbol attribute present in extension.");
}
} else {
cp_log(data->ctx, CP_LOG_ERROR, "No extensions available.");
}
if (exts != NULL) {
cp_release_info(data->ctx, exts);
}
if (data->str == NULL) {
return CP_ERR_RUNTIME;
}
return cp_define_symbol(data->ctx, "used_string", (void *) data->str);
}
void plugincallbacks(void) {
cp_context_t *ctx;
cp_status_t status;
cp_plugin_info_t *plugin;
int errors;
cbc_counters_t *counters;
ctx = init_context(CP_LOG_ERROR, &errors);
cp_set_context_args(ctx, argv);
check((plugin = cp_load_plugin_descriptor(ctx, "tmp/install/plugins/callbackcounter", &status)) != NULL && status == CP_OK);
check(cp_install_plugin(ctx, plugin) == CP_OK);
cp_release_info(ctx, plugin);
// Start plug-in implicitly by resolving a symbol
check((counters = cp_resolve_symbol(ctx, "callbackcounter", "cbc_counters", &status)) != NULL && status == CP_OK);
check(counters->create == 1);
check(counters->start == 1);
check(counters->logger == 0);
check(counters->listener == 1);
check(counters->run == 0);
check(counters->stop == 0);
check(counters->destroy == 0);
check(counters->context_arg_0 != NULL && strcmp(counters->context_arg_0, argv[0]) == 0);
// Cause warning
check(cp_start_plugin(ctx, "nonexisting") == CP_ERR_UNKNOWN);
check(counters->create == 1);
check(counters->start == 1);
check(counters->logger == 1);
check(counters->listener == 1);
check(counters->run == 0);
check(counters->stop == 0);
check(counters->destroy == 0);
// Run run function once
check(cp_run_plugins_step(ctx));
check(counters->create == 1);
check(counters->start == 1);
check(counters->logger == 1);
check(counters->listener == 1);
check(counters->run == 1);
check(counters->stop == 0);
check(counters->destroy == 0);
// Run run function until no more work to be done (run = 3)
cp_run_plugins(ctx);
check(counters->create == 1);
check(counters->start == 1);
check(counters->logger == 1);
check(counters->listener == 1);
check(counters->run == 3);
check(counters->stop == 0);
check(counters->destroy == 0);
/*
* Normally symbols must not be accessed after they have been released.
* We still access counters here because we know that the plug-in
* implementation does not free the counter data.
*/
cp_release_symbol(ctx, counters);
// Stop plug-in
check(cp_stop_plugin(ctx, "callbackcounter") == CP_OK);
check(counters->create == 1);
check(counters->start == 1);
check(counters->logger == 1);
check(counters->listener == 2);
check(counters->run == 3);
check(counters->stop == 1);
// for now 1 but might be 0 in future (delay destroy)
check(counters->destroy == 0 || counters->destroy == 1);
// Uninstall plugin
check(cp_uninstall_plugin(ctx, "callbackcounter") == CP_OK);
check(counters->create == 1);
check(counters->start == 1);
check(counters->logger == 1);
check(counters->listener == 2);
check(counters->run == 3);
check(counters->stop == 1);
check(counters->destroy == 1);
cp_destroy();
check(errors == 0);
/* Free the counter data that was intentionally leaked by the plug-in */
free(counters);
}