//! danos user-space runtime library — a nascent libc. Every user binary (init,
//! and later the VFS server + device drivers) imports this as `@import("runtime")`:
//! system_call wrappers, the C-convention heap, IPC helpers, and the process start
//! shim. It is compiled into each binary (inheriting its `.large` code model and
//! freestanding target), so all user programs share one implementation.
//!
//! A user binary only defines a `pub fn main() void` or
//! `pub fn main(init: runtime.process.Init) void` (arguments arrive via `init`).
//! The panic handler and the `_start` entry pull live in the shared compilation
//! root, library/runtime/root.zig, which build.zig wires around every program —
//! nothing to declare per source file.

pub const system = @import("system.zig");
pub const log = @import("log.zig");
/// Monotonic time, delays, and deadlines over the kernel clock/sleep/timer syscalls
/// — an `Instant`/`Duration` front door, no time service (docs/timers.md).
pub const time = @import("time.zig");
pub const heap = @import("heap.zig");
pub const ipc = @import("ipc.zig");
pub const start = @import("start.zig");
/// The VFS wire protocol (shared with the VFS server).
pub const vfs_protocol = @import("vfs-protocol");

/// The device-manager protocol: hello + tree reports (docs/device-manager.md).
pub const device_manager_protocol = @import("device-manager-protocol");

/// The power protocol: events (button, lid, battery) + shutdown (docs/power.md).
pub const power_protocol = @import("power-protocol");
/// Keyboard-event listening (subscribe/next) and broadcasting (publish), over the input
/// service. See library/runtime/input.zig and system/services/input/.
pub const input = @import("input.zig");
/// The input wire protocol (shared with the input service and its clients).
pub const input_protocol = @import("input-protocol");
/// POSIX-style file API: open/read/write/lseek/stat/close.
/// C stdio: fopen/fread/fwrite/fseek/ftell/fclose over unistd.
/// Device access for drivers: enumerate/claim/mmioMap.
pub const device = @import("device.zig");
/// DMA-capable memory for drivers: contiguous, pinned, uncacheable buffers.
pub const dma = @import("dma.zig");

/// Shared cacheable memory: create a region + capability, pass the capability to another
/// process (an `ipc_call` send_cap), map the same pages there. See library/runtime/shared-memory.zig
/// and docs/display-v2.md.
pub const shared_memory = @import("shared-memory.zig");

/// USB class-driver client: open a device on the xHCI bus and drive it
/// (control / interrupt / bulk transfers). See library/runtime/usb.zig.
pub const usb = @import("usb.zig");

/// Block-device client: read/write a block device (a USB stick, via
/// usb-storage). See library/runtime/block.zig.
pub const block = @import("block.zig");

/// Display-service client: query the mode, and (from D3) create layers, draw, and
/// present frames. See library/runtime/display.zig and system/services/display/.
pub const display = @import("display.zig");
/// The display wire protocol (shared with the display service and its clients).
pub const display_protocol = @import("display-protocol");
/// The scanout wire protocol: the compositor's present channel to a native scanout driver
/// (virtio-gpu). See system/services/display/scanout-protocol.zig and docs/display-v2.md.
pub const scanout_protocol = @import("scanout-protocol");

/// The danos-native file API (open/read/write/list over the user-space VFS) — the
/// layer danos programs use directly, and where the operations that later become
/// `std.os.danos` are staged. See docs/zig-self-hosting.md.
pub const fs = @import("fs.zig");

/// Re-exported so the root shim (root.zig) can install it as the panic handler.
pub const panic = start.panic;

/// Process entry types: the `Init` handed to `main`, and its `Arguments`.
pub const process = @import("process.zig");

/// Threads: `runtime.Thread`, std.Thread-shaped, over the private thread ABI
/// (docs/threading.md). A binary must be built multi-threaded to spawn.
pub const Thread = @import("thread.zig").Thread;

/// The service harness: one replyWait loop folding requests, signals, and
/// notifications into callbacks (docs/process-lifecycle.md).
pub const service = @import("service.zig");

/// The heap as a `std.mem.Allocator`, for Zig `std` containers in user code.
pub const allocator = heap.allocator;
