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#include "rust_internal.h"
#include "rust_chan.h"
/**
* Create a new rust channel and associate it with the specified port.
*/
rust_chan::rust_chan(rust_task *task,
maybe_proxy<rust_port> *port,
size_t unit_sz) :
task(task),
port(port),
buffer(task->dom, unit_sz) {
if (port) {
associate(port);
}
task->log(rust_log::MEM | rust_log::COMM,
"new rust_chan(task=0x%" PRIxPTR
", port=0x%" PRIxPTR ") -> chan=0x%" PRIxPTR,
(uintptr_t) task, (uintptr_t) port, (uintptr_t) this);
}
rust_chan::~rust_chan() {
task->log(rust_log::MEM | rust_log::COMM,
"del rust_chan(task=0x%" PRIxPTR ")", (uintptr_t) this);
A(task->dom, is_associated() == false,
"Channel must be disassociated before being freed.");
}
/**
* Link this channel with the specified port.
*/
void rust_chan::associate(maybe_proxy<rust_port> *port) {
this->port = port;
if (port->is_proxy() == false) {
task->log(rust_log::TASK,
"associating chan: 0x%" PRIxPTR " with port: 0x%" PRIxPTR,
this, port);
this->port->referent()->chans.push(this);
}
}
bool rust_chan::is_associated() {
return port != NULL;
}
/**
* Unlink this channel from its associated port.
*/
void rust_chan::disassociate() {
A(task->dom, is_associated(), "Channel must be associated with a port.");
if (port->is_proxy() == false) {
task->log(rust_log::TASK,
"disassociating chan: 0x%" PRIxPTR " from port: 0x%" PRIxPTR,
this, port->referent());
port->referent()->chans.swap_delete(this);
}
// Delete reference to the port.
port = NULL;
}
/**
* Attempt to send data to the associated port.
*/
void rust_chan::send(void *sptr) {
buffer.enqueue(sptr);
rust_dom *dom = task->dom;
if (!is_associated()) {
W(dom, is_associated(),
"rust_chan::transmit with no associated port.");
return;
}
A(dom, !buffer.is_empty(),
"rust_chan::transmit with nothing to send.");
if (port->is_proxy()) {
data_message::send(buffer.peek(), buffer.unit_sz, "send data",
task->get_handle(), port->as_proxy()->handle());
buffer.dequeue(NULL);
} else {
rust_port *target_port = port->referent();
if (target_port->task->blocked_on(target_port)) {
dom->log(rust_log::COMM, "dequeued in rendezvous_ptr");
buffer.dequeue(target_port->task->rendezvous_ptr);
target_port->task->rendezvous_ptr = 0;
target_port->task->wakeup(target_port);
return;
}
}
return;
}
//
// 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 .. 2>&1 | sed -e 's/\\/x\\//x:\\//g'";
// End:
//
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