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#include "rust_internal.h"
#include "rust_util.h"
#include "rust_scheduler.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),
live_tasks(0),
max_task_id(0),
rval(0),
env(srv->env)
{
sched = new (this, "rust_scheduler")
rust_scheduler(this, srv, num_threads);
live_schedulers = 1;
}
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);
}
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);
}
int rust_kernel::start_schedulers()
{
I(this, !sched_lock.lock_held_by_current_thread());
sched->start_task_threads();
{
scoped_lock with(sched_lock);
// Schedulers could possibly have already exited
if (live_schedulers != 0) {
sched_lock.wait();
}
return rval;
}
}
rust_scheduler *
rust_kernel::get_default_scheduler() {
return sched;
}
void
rust_kernel::release_scheduler() {
I(this, !sched_lock.lock_held_by_current_thread());
scoped_lock with(sched_lock);
delete sched;
--live_schedulers;
if (live_schedulers == 0) {
// We're all done. Tell the main thread to continue
sched_lock.signal();
}
}
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
sched->kill_all_tasks();
}
void
rust_kernel::register_task(rust_task *task) {
uintptr_t new_live_tasks;
{
scoped_lock with(task_lock);
task->user.id = max_task_id++;
task_table.put(task->user.id, task);
new_live_tasks = ++live_tasks;
}
K(srv, task->user.id != INTPTR_MAX, "Hit the maximum task id");
KLOG_("Registered task %" PRIdPTR, task->user.id);
KLOG_("Total outstanding tasks: %d", new_live_tasks);
}
void
rust_kernel::release_task_id(rust_task_id id) {
KLOG_("Releasing task %" PRIdPTR, id);
uintptr_t new_live_tasks;
{
scoped_lock with(task_lock);
task_table.remove(id);
new_live_tasks = --live_tasks;
}
KLOG_("Total outstanding tasks: %d", new_live_tasks);
if (new_live_tasks == 0) {
// There are no more tasks and there never will be.
// Tell all the schedulers to exit.
sched->exit();
}
}
rust_task *
rust_kernel::get_task_by_id(rust_task_id id) {
scoped_lock with(task_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;
}
#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(rval_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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