45 lines
1.1 KiB
C++
45 lines
1.1 KiB
C++
#include "object/port.h"
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#include "scheduler/scheduler.h"
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Port::Port() {}
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z_err_t Port::Write(uint64_t num_bytes, const void* bytes, uint64_t num_caps,
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const z_cap_t* caps) {
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MutexHolder h(mutex_);
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RET_ERR(message_queue_.PushBack(num_bytes, bytes, num_caps, caps));
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if (blocked_threads_.size() > 0) {
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auto thread = blocked_threads_.PopFront();
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thread->SetState(Thread::RUNNABLE);
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gScheduler->Enqueue(thread);
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}
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return glcr::OK;
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}
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z_err_t Port::Read(uint64_t* num_bytes, void* bytes, uint64_t* num_caps,
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z_cap_t* caps) {
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mutex_.Lock();
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while (message_queue_.empty()) {
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auto thread = gScheduler->CurrentThread();
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thread->SetState(Thread::BLOCKED);
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blocked_threads_.PushBack(thread);
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mutex_.Unlock();
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gScheduler->Yield();
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mutex_.Lock();
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}
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mutex_.Unlock();
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MutexHolder lock(mutex_);
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return message_queue_.PopFront(num_bytes, bytes, num_caps, caps);
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}
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void Port::WriteKernel(uint64_t init, glcr::RefPtr<Capability> cap) {
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MutexHolder h(mutex_);
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message_queue_.WriteKernel(init, cap);
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}
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bool Port::HasMessages() {
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MutexHolder h(mutex_);
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return !message_queue_.empty();
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}
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