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#include "rust_internal.h"
rust_kernel::rust_kernel(rust_srv *srv) :
_region(&srv->local_region),
_log(srv, NULL),
_srv(srv),
_interrupt_kernel_loop(FALSE),
domains(&srv->local_region),
message_queues(&srv->local_region) {
// Nop.
}
rust_handle<rust_dom> *
rust_kernel::create_domain(const rust_crate *crate, const char *name) {
rust_message_queue *message_queue =
new (this) rust_message_queue(_srv, this);
rust_srv *srv = _srv->clone();
rust_dom *dom =
new (this) rust_dom(this, message_queue, srv, crate, name);
rust_handle<rust_dom> *handle = get_dom_handle(dom);
message_queue->associate(handle);
domains.append(dom);
message_queues.append(message_queue);
return handle;
}
void
rust_kernel::destroy_domain(rust_dom *dom) {
log(rust_log::KERN, "deleting domain: " PTR ", index: %d, domains %d",
dom, dom->list_index, domains.length());
domains.remove(dom);
dom->message_queue->disassociate();
rust_srv *srv = dom->srv;
delete dom;
delete srv;
}
rust_handle<rust_dom> *
rust_kernel::get_dom_handle(rust_dom *dom) {
rust_handle<rust_dom> *handle = NULL;
if (_dom_handles.get(dom, &handle)) {
return handle;
}
handle = new (this) rust_handle<rust_dom>(this, dom->message_queue, dom);
_dom_handles.put(dom, handle);
return handle;
}
rust_handle<rust_task> *
rust_kernel::get_task_handle(rust_task *task) {
rust_handle<rust_task> *handle = NULL;
if (_task_handles.get(task, &handle)) {
return handle;
}
handle = new (this) rust_handle<rust_task>(this, task->dom->message_queue,
task);
_task_handles.put(task, handle);
return handle;
}
rust_handle<rust_port> *
rust_kernel::get_port_handle(rust_port *port) {
rust_handle<rust_port> *handle = NULL;
if (_port_handles.get(port, &handle)) {
return handle;
}
handle = new (this) rust_handle<rust_port>(this,
port->task->dom->message_queue, port);
_port_handles.put(port, handle);
return handle;
}
void
rust_kernel::join_all_domains() {
// TODO: Perhaps we can do this a little smarter. Just spin wait for now.
while (domains.length() > 0) {
sync::yield();
}
}
void
rust_kernel::log_all_domain_state() {
log(rust_log::KERN, "log_all_domain_state: %d domains", domains.length());
for (uint32_t i = 0; i < domains.length(); i++) {
domains[i]->log_state();
}
}
/**
* Checks for simple deadlocks.
*/
bool
rust_kernel::is_deadlocked() {
return false;
// _lock.lock();
// if (domains.length() != 1) {
// // We can only check for deadlocks when only one domain exists.
// return false;
// }
//
// if (domains[0]->running_tasks.length() != 0) {
// // We are making progress and therefore we are not deadlocked.
// return false;
// }
//
// if (domains[0]->message_queue->is_empty() &&
// domains[0]->blocked_tasks.length() > 0) {
// // We have no messages to process, no running tasks to schedule
// // and some blocked tasks therefore we are likely in a deadlock.
// log_all_domain_state();
// return true;
// }
//
// _lock.unlock();
// return false;
}
void
rust_kernel::log(uint32_t type_bits, char const *fmt, ...) {
char buf[256];
if (_log.is_tracing(type_bits)) {
va_list args;
va_start(args, fmt);
vsnprintf(buf, sizeof(buf), fmt, args);
_log.trace_ln(NULL, type_bits, buf);
va_end(args);
}
}
void
rust_kernel::start_kernel_loop() {
while (_interrupt_kernel_loop == false) {
message_queues.global.lock();
for (size_t i = 0; i < message_queues.length(); i++) {
rust_message_queue *queue = message_queues[i];
if (queue->is_associated() == false) {
rust_message *message = NULL;
while (queue->dequeue(&message)) {
message->kernel_process();
delete message;
}
}
}
message_queues.global.unlock();
}
}
void
rust_kernel::run() {
log(rust_log::KERN, "started kernel loop");
start_kernel_loop();
log(rust_log::KERN, "finished kernel loop");
}
rust_kernel::~rust_kernel() {
K(_srv, domains.length() == 0,
"Kernel has %d live domain(s), join all domains before killing "
"the kernel.", domains.length());
// If the kernel loop is running, interrupt it, join and exit.
if (is_running()) {
_interrupt_kernel_loop = true;
join();
}
free_handles(_task_handles);
free_handles(_port_handles);
free_handles(_dom_handles);
rust_message_queue *queue = NULL;
while (message_queues.pop(&queue)) {
K(_srv, queue->is_empty(), "Kernel message queue should be empty "
"before killing the kernel.");
delete queue;
}
}
void *
rust_kernel::malloc(size_t size) {
return _region->malloc(size);
}
void rust_kernel::free(void *mem) {
_region->free(mem);
}
template<class T> void
rust_kernel::free_handles(hash_map<T*, rust_handle<T>* > &map) {
T* key;
rust_handle<T> *value;
while (map.pop(&key, &value)) {
delete value;
}
}
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