Function SysEndpointDequeue

Kernel/src/arch/x86_64/syscalls.cpp:2428–2457

//////////////////////// \brief SysEndpointDequeue (endpoint, id, size, data) Accept a pending connection on an interface and return a new MessageEndpoint \param endpoint (handle_id_t) Handle ID of specified endpoint \param id (uint64_t*) Returned message ID \param size (uint32_t*) Returned message Size \param data (uint8_t*) Message data buffer \return 0 on empty, 1 on success, negative error

/// \return 0 on empty, 1 on success, negative error code on failure
/////////////////////////////
long SysEndpointDequeue(regs64_t* r){
	process_t* currentProcess = Scheduler::GetCurrentProcess();

	Handle* endpHandle;
	if(Scheduler::FindHandle(currentProcess, SC_ARG0(r), &endpHandle)){
		Log::Warning("SysEndpointDequeue: Invalid handle ID %d", SC_ARG0(r));
		return -EINVAL;
	}

	if(!endpHandle->ko->IsType(MessageEndpoint::TypeID())){
		Log::Warning("SysEndpointDequeue: Invalid handle type (ID %d)", SC_ARG0(r));
		return -EINVAL;
	}

	if(!Memory::CheckUsermodePointer(SC_ARG1(r), sizeof(uint64_t), currentProcess->addressSpace)){
		return -EFAULT;
	}

	if(!Memory::CheckUsermodePointer(SC_ARG2(r), sizeof(uint16_t), currentProcess->addressSpace)){
		return -EFAULT;
	}

	MessageEndpoint* endpoint = reinterpret_cast<MessageEndpoint*>(endpHandle->ko.get());

	if(!Memory::CheckUsermodePointer(SC_ARG3(r), endpoint->GetMaxMessageSize(), currentProcess->addressSpace)){
		return -EFAULT;
	}

	return endpoint->Read(reinterpret_cast<uint64_t*>(SC_ARG1(r)), reinterpret_cast<uint16_t*>(SC_ARG2(r)), reinterpret_cast<uint64_t*>(SC_ARG3(r)));
}

/////////////////////////////
/// \brief SysEndpointCall (endpoint, id, data, rID, rData, size, timeout)