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#include "Task.h"
#include "TaskMan.h"
#include "Exceptions.h"
#include "Printer.h"
#include "Local.h"
static Balau::LocalTmpl<Balau::Task> localTask;
Balau::Task::Task() {
size_t size = stackSize();
m_stack = malloc(size);
coro_create(&m_ctx, coroutine, this, m_stack, size);
m_taskMan = TaskMan::getTaskMan();
m_taskMan->registerTask(this);
m_tls = g_tlsManager->createTLS();
void * oldTLS = g_tlsManager->getTLS();
g_tlsManager->setTLS(m_tls);
localTask.set(this);
g_tlsManager->setTLS(oldTLS);
m_status = STARTING;
m_loop = NULL;
m_okayToEAgain = false;
Printer::elog(E_TASK, "Created a Task at %p");
}
Balau::Task::~Task() {
if (m_loop)
ev_loop_destroy(m_loop);
free(m_stack);
free(m_tls);
}
void Balau::Task::coroutine(void * arg) {
Task * task = reinterpret_cast<Task *>(arg);
Assert(task);
Assert(task->m_status == STARTING);
try {
task->m_status = RUNNING;
task->Do();
task->m_status = STOPPED;
}
catch (GeneralException & e) {
Printer::log(M_WARNING, "Task %s at %p caused an exception: `%s' - stopping.", task->getName(), task, e.getMsg());
task->m_status = FAULTED;
}
catch (...) {
Printer::log(M_WARNING, "Task %s at %p caused an unknown exception - stopping.", task->getName(), task);
task->m_status = FAULTED;
}
coro_transfer(&task->m_ctx, &task->m_taskMan->m_returnContext);
}
void Balau::Task::switchTo() {
Printer::elog(E_TASK, "Switching to task %p - %s", this, getName());
Assert(m_status == IDLE || m_status == STARTING);
void * oldTLS = g_tlsManager->getTLS();
g_tlsManager->setTLS(m_tls);
coro_transfer(&m_taskMan->m_returnContext, &m_ctx);
g_tlsManager->setTLS(oldTLS);
if (m_status == RUNNING)
m_status = IDLE;
}
void Balau::Task::yield(bool override) {
if (m_loop && override) {
ev_run(m_loop, 0);
} else {
coro_transfer(&m_ctx, &m_taskMan->m_returnContext);
}
}
Balau::Task * Balau::Task::getCurrentTask() {
return localTask.get();
}
void Balau::Task::waitFor(Balau::Events::BaseEvent * e, bool override) {
struct ev_loop * loop = m_loop;
if (!override)
m_loop = NULL;
e->registerOwner(this);
m_loop = loop;
}
bool Balau::Task::setPreemptible(bool enable) {
bool wasPreemptible = !m_loop;
if (!m_loop && !enable) {
m_loop = ev_loop_new(EVFLAG_AUTO);
} else if (m_loop) {
ev_loop_destroy(m_loop);
m_loop = NULL;
}
return wasPreemptible;
}
struct ev_loop * Balau::Task::getLoop() {
if (m_loop)
return m_loop;
else
return getTaskMan()->getLoop();
}
void Balau::Events::BaseEvent::doSignal() {
Printer::elog(E_TASK, "Event at %p (%s) is signaled with cb %p and task %p", this, ClassName(this).c_str(), m_cb, m_task);
m_signal = true;
if (m_cb)
m_cb->gotEvent(this);
if (m_task) {
Printer::elog(E_TASK, "Signaling task %p (%s - %s)", m_task, m_task->getName(), ClassName(m_task).c_str());
m_task->getTaskMan()->signalTask(m_task);
}
}
Balau::Events::TaskEvent::TaskEvent(Task * taskWaited) : m_taskWaited(taskWaited) {
m_taskWaited->m_waitedBy.push_back(this);
}
Balau::Events::Timeout::Timeout(ev_tstamp tstamp) {
set(tstamp);
}
void Balau::Events::Timeout::set(ev_tstamp tstamp) {
m_evt.set<Timeout, &Timeout::evt_cb>(this);
m_evt.set(tstamp);
}
void Balau::Events::Timeout::gotOwner(Task * task) {
m_evt.set(task->getLoop());
m_evt.start();
}
void Balau::Events::Timeout::evt_cb(ev::timer & w, int revents) {
doSignal();
}
void Balau::Events::Custom::gotOwner(Task * task) {
m_loop = task->getLoop();
}
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