47 lines
1.1 KiB
C++
47 lines
1.1 KiB
C++
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#include <assert.h>
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#include "rust_internal.h"
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#include "rust_sched_driver.h"
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#include "rust_sched_loop.h"
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rust_sched_driver::rust_sched_driver(rust_sched_loop *sched_loop)
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: sched_loop(sched_loop),
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signalled(false) {
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assert(sched_loop != NULL);
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sched_loop->on_pump_loop(this);
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}
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/**
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* Starts the main scheduler loop which performs task scheduling for this
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* domain.
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*
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* Returns once no more tasks can be scheduled and all task ref_counts
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* drop to zero.
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*/
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void
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rust_sched_driver::start_main_loop() {
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assert(sched_loop != NULL);
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rust_sched_loop_state state = sched_loop_state_keep_going;
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while (state != sched_loop_state_exit) {
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DLOG(sched_loop, dom, "pumping scheduler");
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state = sched_loop->run_single_turn();
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if (state == sched_loop_state_block) {
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scoped_lock with(lock);
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if (!signalled) {
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DLOG(sched_loop, dom, "blocking scheduler");
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lock.wait();
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}
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signalled = false;
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}
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}
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}
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void
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rust_sched_driver::signal() {
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scoped_lock with(lock);
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signalled = true;
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lock.signal();
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}
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