# os

### make_transform() <sub>function</sub>

Create a new transform object that can be used for 2D/3D positioning, scaling, and rotation.

### clean_transforms() <sub>function</sub>

Force an update on all transforms to remove dangling references or perform house-keeping.

### platform() <sub>function</sub>

Return a string with the underlying platform name, like 'Windows', 'Linux', or 'macOS'.

### arch() <sub>function</sub>

Return the CPU architecture string for this system (e.g. 'x64', 'arm64').

### totalmem() <sub>function</sub>

Return the total system RAM in bytes.

### freemem() <sub>function</sub>

Return the amount of free system RAM in bytes, if known.

### hostname() <sub>function</sub>

Return the system's hostname, or an empty string if not available.

### version() <sub>function</sub>

Return the OS or kernel version string, if the platform provides it.

### kill() <sub>function</sub>

Send a signal (e.g., 'SIGINT', 'SIGTERM', etc.) to the current process.

### exit() <sub>function</sub>

Exit the application with the specified exit code.

### now() <sub>function</sub>

Return current time (in seconds as a float) with high resolution.

### openurl() <sub>function</sub>

Open the provided URL in the default web browser, if possible.

### make_timer() <sub>function</sub>

Create a new timer object that will call a specified function after a certain delay.

### update_timers() <sub>function</sub>

Advance all timers by the provided time delta (in seconds).

### sleep() <sub>function</sub>

Block execution for the specified number of seconds.

### battery_pct() <sub>function</sub>

Return the battery level (percentage) or negative if unknown.

### battery_voltage() <sub>function</sub>

Return the current battery voltage in volts, if available.

### battery_seconds() <sub>function</sub>

Return the estimated remaining battery time in seconds, or negative if unknown.

### power_state() <sub>function</sub>

Return a string describing power status: 'on battery', 'charging', 'charged', etc.

### on() <sub>function</sub>

Register a global callback for certain engine-wide or system-level events.

### rt_info() <sub>function</sub>

Return internal QuickJS runtime info, such as object counts.

### rusage() <sub>function</sub>

Return resource usage stats for this process, if the platform supports it.

### mallinfo() <sub>function</sub>

Return detailed memory allocation info (arena size, free blocks, etc.) on some platforms.

### env() <sub>function</sub>

Fetch the value of a given environment variable, or undefined if it doesn't exist.

### system() <sub>function</sub>

Execute a shell command using the system() call. Returns the command's exit code.