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#include "rust_internal.h"
#include "rust_port.h"
rust_port::rust_port(rust_task *task, size_t unit_sz)
: ref_count(1), kernel(task->kernel), task(task),
unit_sz(unit_sz), buffer(kernel, unit_sz) {
LOG(task, comm,
"new rust_port(task=0x%" PRIxPTR ", unit_sz=%d) -> port=0x%"
PRIxPTR, (uintptr_t)task, unit_sz, (uintptr_t)this);
task->ref();
id = task->register_port(this);
}
rust_port::~rust_port() {
LOG(task, comm, "~rust_port 0x%" PRIxPTR, (uintptr_t) this);
task->deref();
}
void rust_port::detach() {
I(task->sched, !task->lock.lock_held_by_current_thread());
scoped_lock with(task->lock);
{
task->release_port(id);
}
}
void rust_port::send(void *sptr) {
I(task->sched, !lock.lock_held_by_current_thread());
scoped_lock with(lock);
buffer.enqueue(sptr);
A(kernel, !buffer.is_empty(),
"rust_chan::transmit with nothing to send.");
if (task->blocked_on(this)) {
KLOG(kernel, comm, "dequeued in rendezvous_ptr");
buffer.dequeue(task->rendezvous_ptr);
task->rendezvous_ptr = 0;
task->wakeup(this);
}
}
bool rust_port::receive(void *dptr) {
I(task->sched, lock.lock_held_by_current_thread());
if (buffer.is_empty() == false) {
buffer.dequeue(dptr);
LOG(task, comm, "<=== read data ===");
return true;
}
return false;
}
size_t rust_port::size() {
I(task->sched, !lock.lock_held_by_current_thread());
scoped_lock with(lock);
return buffer.size();
}
void rust_port::log_state() {
LOG(task, comm,
"port size: %d",
buffer.size());
}
//
// Local Variables:
// mode: C++
// fill-column: 78;
// indent-tabs-mode: nil
// c-basic-offset: 4
// buffer-file-coding-system: utf-8-unix
// compile-command: "make -k -C $RBUILD 2>&1 | sed -e 's/\\/x\\//x:\\//g'";
// End:
//
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