HelenOS sources
This source file includes following definitions.
- register_fun_verbose
- plug_unplug
- fun_remove
- fun_unbind
- test2_dev_add
- test2_dev_remove
- test2_dev_gone
- test2_fun_online
- test2_fun_offline
- main
#include <assert.h>
#include <stdio.h>
#include <errno.h>
#include <fibril.h>
#include <str.h>
#include <str_error.h>
#include <ddf/driver.h>
#include <ddf/log.h>
#define NAME "test2"
static errno_t test2_dev_add(ddf_dev_t *dev);
static errno_t test2_dev_remove(ddf_dev_t *dev);
static errno_t test2_dev_gone(ddf_dev_t *dev);
static errno_t test2_fun_online(ddf_fun_t *fun);
static errno_t test2_fun_offline(ddf_fun_t *fun);
static driver_ops_t driver_ops = {
.dev_add = &test2_dev_add,
.dev_remove = &test2_dev_remove,
.dev_gone = &test2_dev_gone,
.fun_online = &test2_fun_online,
.fun_offline = &test2_fun_offline
};
static driver_t test2_driver = {
.name = NAME,
.driver_ops = &driver_ops
};
typedef struct {
ddf_dev_t *dev;
ddf_fun_t *fun_a;
ddf_fun_t *fun_err;
ddf_fun_t *child;
ddf_fun_t *test1;
} test2_t;
static errno_t register_fun_verbose(ddf_dev_t *parent, const char *message,
const char *name, const char *match_id, int match_score, ddf_fun_t **pfun)
{
ddf_fun_t *fun;
errno_t rc;
ddf_msg(LVL_DEBUG, "Registering function `%s': %s.", name, message);
fun = ddf_fun_create(parent, fun_inner, name);
if (fun == NULL) {
ddf_msg(LVL_ERROR, "Failed creating function %s", name);
return ENOMEM;
}
rc = ddf_fun_add_match_id(fun, match_id, match_score);
if (rc != EOK) {
ddf_msg(LVL_ERROR, "Failed adding match IDs to function %s",
name);
ddf_fun_destroy(fun);
return rc;
}
rc = ddf_fun_bind(fun);
if (rc != EOK) {
ddf_msg(LVL_ERROR, "Failed binding function %s: %s", name,
str_error(rc));
ddf_fun_destroy(fun);
return rc;
}
*pfun = fun;
ddf_msg(LVL_NOTE, "Registered child device `%s'", name);
return EOK;
}
static errno_t plug_unplug(void *arg)
{
test2_t *test2 = (test2_t *) arg;
ddf_fun_t *fun_a;
errno_t rc;
fibril_usleep(1000);
(void) register_fun_verbose(test2->dev, "child driven by the same task",
"child", "virtual&test2", 10, &test2->child);
(void) register_fun_verbose(test2->dev, "child driven by test1",
"test1", "virtual&test1", 10, &test2->test1);
fun_a = ddf_fun_create(test2->dev, fun_exposed, "a");
if (fun_a == NULL) {
ddf_msg(LVL_ERROR, "Failed creating function 'a'.");
return ENOMEM;
}
rc = ddf_fun_bind(fun_a);
if (rc != EOK) {
ddf_fun_destroy(fun_a);
ddf_msg(LVL_ERROR, "Failed binding function 'a'.");
return rc;
}
rc = ddf_fun_add_to_category(fun_a, "virtual");
if (rc != EOK) {
ddf_fun_unbind(fun_a);
ddf_fun_destroy(fun_a);
ddf_msg(LVL_ERROR, "Failed adding function 'a' to category "
"'virtual'.");
return rc;
}
test2->fun_a = fun_a;
fibril_usleep(10000000);
ddf_msg(LVL_NOTE, "Unbinding function test1.");
ddf_fun_unbind(test2->test1);
fibril_usleep(1000000);
ddf_msg(LVL_NOTE, "Unbinding function child.");
ddf_fun_unbind(test2->child);
return EOK;
}
static errno_t fun_remove(ddf_fun_t *fun, const char *name)
{
errno_t rc;
ddf_msg(LVL_DEBUG, "fun_remove(%p, '%s')", fun, name);
rc = ddf_fun_offline(fun);
if (rc != EOK) {
ddf_msg(LVL_ERROR, "Error offlining function '%s'.", name);
return rc;
}
rc = ddf_fun_unbind(fun);
if (rc != EOK) {
ddf_msg(LVL_ERROR, "Failed unbinding function '%s'.", name);
return rc;
}
ddf_fun_destroy(fun);
return EOK;
}
static errno_t fun_unbind(ddf_fun_t *fun, const char *name)
{
errno_t rc;
ddf_msg(LVL_DEBUG, "fun_unbind(%p, '%s')", fun, name);
rc = ddf_fun_unbind(fun);
if (rc != EOK) {
ddf_msg(LVL_ERROR, "Failed unbinding function '%s'.", name);
return rc;
}
ddf_fun_destroy(fun);
return EOK;
}
static errno_t test2_dev_add(ddf_dev_t *dev)
{
test2_t *test2;
const char *dev_name = ddf_dev_get_name(dev);
ddf_msg(LVL_DEBUG, "test2_dev_add(name=\"%s\", handle=%d)",
dev_name, (int) ddf_dev_get_handle(dev));
test2 = ddf_dev_data_alloc(dev, sizeof(test2_t));
if (test2 == NULL) {
ddf_msg(LVL_ERROR, "Failed allocating soft state.");
return ENOMEM;
}
test2->dev = dev;
if (str_cmp(dev_name, "child") != 0) {
fid_t postpone = fibril_create(plug_unplug, test2);
if (postpone == 0) {
ddf_msg(LVL_ERROR, "fibril_create() failed.");
return ENOMEM;
}
fibril_add_ready(postpone);
} else {
(void) register_fun_verbose(dev, "child without available driver",
"ERROR", "non-existent.match.id", 10, &test2->fun_err);
}
return EOK;
}
static errno_t test2_dev_remove(ddf_dev_t *dev)
{
test2_t *test2 = (test2_t *)ddf_dev_data_get(dev);
errno_t rc;
ddf_msg(LVL_DEBUG, "test2_dev_remove(%p)", dev);
if (test2->fun_a != NULL) {
rc = fun_remove(test2->fun_a, "a");
if (rc != EOK)
return rc;
}
if (test2->fun_err != NULL) {
rc = fun_remove(test2->fun_err, "ERROR");
if (rc != EOK)
return rc;
}
if (test2->child != NULL) {
rc = fun_remove(test2->child, "child");
if (rc != EOK)
return rc;
}
if (test2->test1 != NULL) {
rc = fun_remove(test2->test1, "test1");
if (rc != EOK)
return rc;
}
return EOK;
}
static errno_t test2_dev_gone(ddf_dev_t *dev)
{
test2_t *test2 = (test2_t *)ddf_dev_data_get(dev);
errno_t rc;
ddf_msg(LVL_DEBUG, "test2_dev_gone(%p)", dev);
if (test2->fun_a != NULL) {
rc = fun_unbind(test2->fun_a, "a");
if (rc != EOK)
return rc;
}
if (test2->fun_err != NULL) {
rc = fun_unbind(test2->fun_err, "ERROR");
if (rc != EOK)
return rc;
}
if (test2->child != NULL) {
rc = fun_unbind(test2->child, "child");
if (rc != EOK)
return rc;
}
if (test2->test1 != NULL) {
rc = fun_unbind(test2->test1, "test1");
if (rc != EOK)
return rc;
}
return EOK;
}
static errno_t test2_fun_online(ddf_fun_t *fun)
{
ddf_msg(LVL_DEBUG, "test2_fun_online()");
return ddf_fun_online(fun);
}
static errno_t test2_fun_offline(ddf_fun_t *fun)
{
ddf_msg(LVL_DEBUG, "test2_fun_offline()");
return ddf_fun_offline(fun);
}
int main(int argc, char *argv[])
{
printf(NAME ": HelenOS test2 virtual device driver\n");
ddf_log_init(NAME);
return ddf_driver_main(&test2_driver);
}
HelenOS homepage, sources at GitHub