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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_okayToEAgain = false;
Printer::elog(E_TASK, "Created a Task at %p");
}
Balau::Task::~Task() {
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() {
Printer::elog(E_TASK, "Task %p - %s yielding", this, getName());
coro_transfer(&m_ctx, &m_taskMan->m_returnContext);
}
Balau::Task * Balau::Task::getCurrentTask() {
return localTask.get();
}
void Balau::Task::waitFor(Balau::Events::BaseEvent * e) {
Printer::elog(E_TASK, "Task %p - %s waits for event %p (%s)", this, getName(), e, ClassName(e).c_str());
e->registerOwner(this);
}
struct ev_loop * Balau::Task::getLoop() {
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_ack(false) {
m_taskWaited->m_waitedBy.push_back(this);
}
Balau::Events::TaskEvent::~TaskEvent() {
if (!m_ack)
ack();
}
void Balau::Events::TaskEvent::ack() {
Assert(!m_ack);
bool deleted = false;
Task * t = m_taskWaited;
Task::waitedByList_t::iterator i;
for (i = t->m_waitedBy.begin(); i != t->m_waitedBy.end(); i++) {
if (*i == this) {
t->m_waitedBy.erase(i);
deleted = true;
break;
}
}
Printer::elog(E_TASK, "TaskEvent at %p being ack; removing from the 'waited by' list of %p (%s - %s); deleted = %s", this, t, t->getName(), ClassName(t).c_str(), deleted ? "true" : "false");
Assert(deleted);
m_ack = true;
reset();
}
void Balau::Events::Timeout::gotOwner(Task * task) {
m_evt.set(task->getLoop());
m_evt.start();
}
void Balau::Events::Async::gotOwner(Task * task) {
m_evt.set(task->getLoop());
m_evt.start();
}
void Balau::Events::Custom::gotOwner(Task * task) {
m_loop = task->getLoop();
}
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