# ⏱️ WIA-COMP-019: Real-Time Operating System Standard

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> **Standard ID:** WIA-COMP-019
> **Version:** 1.0.0
> **Status:** Active
> **Category:** COMP / Computing & Software
> **Color:** Blue (#3B82F6)


## 📋 Overview

This standard provides comprehensive specifications and implementation guidelines.

## 🚀 Quick Start

```bash
git clone https://github.com/WIA-Official/wia-standards.git
cd wia-standards/standards/real-time-os
```

## 📚 Documentation

- **Specification**: `spec/` - Complete technical specification
- **API Reference**: `api/` - SDK and API documentation
- **Examples**: `examples/` - Usage examples

---

## 🌟 Overview

The WIA-COMP-019 standard defines comprehensive framework for real-time operating systems, including task scheduling, inter-process communication, resource management, timing analysis, and deterministic behavior guarantees.

**弘익인간 (Benefit All Humanity)** - This standard enables reliable real-time systems for safety-critical applications, industrial automation, and time-sensitive computing.

## 🎯 Key Features

- **Deterministic Scheduling**: Preemptive priority-based scheduling
- **Hard Real-Time**: Guaranteed deadline compliance
- **Task Management**: Thread creation, deletion, synchronization
- **IPC Mechanisms**: Semaphores, mutexes, queues, events
- **Memory Management**: Real-time memory allocation
- **Interrupt Handling**: Low-latency interrupt processing
- **Timing Analysis**: WCET (Worst Case Execution Time)
- **Resource Management**: Priority inheritance, ceiling protocols
- **Multi-Core Support**: SMP and AMP configurations
- **Safety Certification**: MISRA-C, DO-178C, IEC 61508

## 📊 Core Concepts

### 1. Scheduling Algorithms

```
RTOS Scheduling:
- Rate Monotonic (RM): Static priority by period
- Earliest Deadline First (EDF): Dynamic priority
- Fixed Priority Preemptive: Traditional RTOS
- Time Slice: Round-robin for equal priority
```

### 2. Real-Time Constraints

| Type | Deadline | Penalty | Example |
|------|----------|---------|---------|
| Hard RT | Must meet | System failure | Airbag deployment |
| Firm RT | Should meet | Degraded quality | Video frame drop |
| Soft RT | Best effort | User dissatisfaction | UI responsiveness |

## 🔧 Components

### C API

```c
#include "wia-rtos.h"

// Create task
wia_task_t task;
wia_task_create(&task, "sensor_task", 
    sensor_task_function, 
    NULL, 
    PRIORITY_HIGH,
    STACK_SIZE_2KB);

// Create semaphore
wia_sem_t sem;
wia_sem_create(&sem, 0, 1);

// Wait with timeout
wia_status_t status = wia_sem_wait(&sem, TIMEOUT_100MS);
```

### CLI Tool

```bash
# Analyze task timing
wia-comp-019 analyze --config rtos.yml --output timing_report.txt

# Simulate RTOS schedule
wia-comp-019 simulate --tasks tasks.json --duration 10s

# Validate scheduling
wia-comp-019 validate --algorithm RM --utilization-bound 0.69
```

## 📖 Use Cases

1. **Industrial Automation**: PLCs, motion control
2. **Automotive**: ECUs, autonomous driving
3. **Aerospace**: Flight control, avionics
4. **Medical Devices**: Pacemakers, infusion pumps
5. **Telecommunications**: Base stations, routers
6. **Robotics**: Motion planning, sensor fusion
7. **Defense**: Weapon systems, radar

---

**弘익인간 (홍익인간) · Benefit All Humanity**

*© 2025 SmileStory Inc. / WIA*
*MIT License*

## 🌍 Philosophy

**홍익인간 (弘益人間)** - Benefit All Humanity

This standard embodies the Korean philosophy of 弘益人間, aiming to benefit all humanity.


**홍익인간 (弘益人間) - Benefit All Humanity** 🌍