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#include "rust_internal.h"
#include "rust_util.h"
#define KLOG_(...) \
KLOG(this, kern, __VA_ARGS__)
#define KLOG_ERR_(field, ...) \
KLOG_LVL(this, field, log_err, __VA_ARGS__)
rust_kernel::rust_kernel(rust_srv *srv, size_t num_threads) :
_region(srv, true),
_log(srv, NULL),
srv(srv),
max_id(0),
rval(0),
num_threads(num_threads),
live_tasks(0),
env(srv->env)
{
isaac_init(this, &rctx);
create_schedulers();
}
rust_scheduler *
rust_kernel::create_scheduler(int id) {
_kernel_lock.lock();
rust_srv *srv = this->srv->clone();
rust_scheduler *sched =
new (this, "rust_scheduler") rust_scheduler(this, srv, id);
KLOG_("created scheduler: " PTR ", id: %d, index: %d",
sched, id, sched->list_index);
_kernel_lock.unlock();
return sched;
}
void
rust_kernel::destroy_scheduler(rust_scheduler *sched) {
_kernel_lock.lock();
KLOG_("deleting scheduler: " PTR ", name: %s, index: %d",
sched, sched->name, sched->list_index);
rust_srv *srv = sched->srv;
delete sched;
delete srv;
_kernel_lock.unlock();
}
void rust_kernel::create_schedulers() {
KLOG_("Using %d scheduler threads.", num_threads);
for(size_t i = 0; i < num_threads; ++i) {
threads.push(create_scheduler(i));
}
}
void rust_kernel::destroy_schedulers() {
for(size_t i = 0; i < num_threads; ++i) {
destroy_scheduler(threads[i]);
}
}
void
rust_kernel::log_all_scheduler_state() {
for(size_t i = 0; i < num_threads; ++i) {
threads[i]->log_state();
}
}
/**
* Checks for simple deadlocks.
*/
bool
rust_kernel::is_deadlocked() {
return false;
}
void
rust_kernel::log(uint32_t level, char const *fmt, ...) {
char buf[BUF_BYTES];
va_list args;
va_start(args, fmt);
vsnprintf(buf, sizeof(buf), fmt, args);
_log.trace_ln(NULL, level, buf);
va_end(args);
}
void
rust_kernel::fatal(char const *fmt, ...) {
char buf[BUF_BYTES];
va_list args;
va_start(args, fmt);
vsnprintf(buf, sizeof(buf), fmt, args);
_log.trace_ln(NULL, (uint32_t)0, buf);
exit(1);
va_end(args);
}
rust_kernel::~rust_kernel() {
destroy_schedulers();
}
void *
rust_kernel::malloc(size_t size, const char *tag) {
return _region.malloc(size, tag);
}
void *
rust_kernel::realloc(void *mem, size_t size) {
return _region.realloc(mem, size);
}
void rust_kernel::free(void *mem) {
_region.free(mem);
}
void
rust_kernel::signal_kernel_lock() {
_kernel_lock.lock();
_kernel_lock.unlock();
}
int rust_kernel::start_task_threads()
{
for(size_t i = 0; i < num_threads; ++i) {
rust_scheduler *thread = threads[i];
thread->start();
}
for(size_t i = 0; i < num_threads; ++i) {
rust_scheduler *thread = threads[i];
thread->join();
}
return rval;
}
void
rust_kernel::fail() {
// FIXME: On windows we're getting "Application has requested the
// Runtime to terminate it in an unusual way" when trying to shutdown
// cleanly.
set_exit_status(PROC_FAIL_CODE);
#if defined(__WIN32__)
exit(rval);
#endif
for(size_t i = 0; i < num_threads; ++i) {
rust_scheduler *thread = threads[i];
thread->kill_all_tasks();
}
}
rust_task_id
rust_kernel::create_task(rust_task *spawner, const char *name,
size_t init_stack_sz) {
scoped_lock with(_kernel_lock);
rust_scheduler *thread = threads[isaac_rand(&rctx) % num_threads];
rust_task *t = thread->create_task(spawner, name, init_stack_sz);
t->user.id = max_id++;
task_table.put(t->user.id, t);
return t->user.id;
}
rust_task_id
rust_kernel::create_task(rust_task *spawner, const char *name) {
return create_task(spawner, name, env->min_stack_size);
}
rust_task *
rust_kernel::get_task_by_id(rust_task_id id) {
scoped_lock with(_kernel_lock);
rust_task *task = NULL;
// get leaves task unchanged if not found.
task_table.get(id, &task);
if(task) {
if(task->get_ref_count() == 0) {
// this means the destructor is running, since the destructor
// grabs the kernel lock to unregister the task. Pretend this
// doesn't actually exist.
return NULL;
}
else {
task->ref();
}
}
return task;
}
void
rust_kernel::release_task_id(rust_task_id id) {
scoped_lock with(_kernel_lock);
task_table.remove(id);
}
void rust_kernel::exit_schedulers() {
for(size_t i = 0; i < num_threads; ++i) {
threads[i]->exit();
}
}
#ifdef __WIN32__
void
rust_kernel::win32_require(LPCTSTR fn, BOOL ok) {
if (!ok) {
LPTSTR buf;
DWORD err = GetLastError();
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL, err,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &buf, 0, NULL );
KLOG_ERR_(dom, "%s failed with error %ld: %s", fn, err, buf);
LocalFree((HLOCAL)buf);
I(this, ok);
}
}
#endif
void
rust_kernel::set_exit_status(int code) {
scoped_lock with(_kernel_lock);
// If we've already failed then that's the code we're going to use
if (rval != PROC_FAIL_CODE) {
rval = code;
}
}
//
// Local Variables:
// mode: C++
// fill-column: 78;
// indent-tabs-mode: nil
// c-basic-offset: 4
// buffer-file-coding-system: utf-8-unix
// End:
//
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