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//! Attachment management
const attachment_limits = @import("../common/limits/attachment.zig");
const kata_limits = @import("../common/limits/kata.zig");
pub const Type = enum {
Unit,
Device,
Closed,
};
pub const DeviceType = enum {
Source,
Stream,
Trace,
Void,
Chaos,
Zero,
Console,
};
pub const Attachment = struct {
attachment_type: Type = .Closed,
location: [attachment_limits.MAX_LOCATION_LENGTH]u8 = undefined,
location_len: usize = 0,
position: u64 = 0,
unit_size: u64 = 0,
buffer: ?[]u8 = null,
flags: u32 = 0,
dirty: bool = false,
device_type: ?DeviceType = null,
};
const POOL_SIZE = kata_limits.MAX_KATAS * kata_limits.MAX_ATTACHMENTS;
var pool: [POOL_SIZE]Attachment = undefined;
var pool_used: [POOL_SIZE]bool = [_]bool{false} ** POOL_SIZE;
pub fn alloc() ?*Attachment {
for (&pool, 0..) |*entry, i| {
if (!pool_used[i]) {
pool_used[i] = true;
entry.* = Attachment{};
return entry;
}
}
return null;
}
pub fn free(ptr: *Attachment) void {
const addr = @intFromPtr(ptr);
const base = @intFromPtr(&pool[0]);
const size = @sizeOf(Attachment);
if (addr >= base and addr < base + POOL_SIZE * size) {
const idx = (addr - base) / size;
pool_used[idx] = false;
}
}
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