InitOptions

pub const InitOptions = struct {
    /// Affects how many bytes are memory-mapped for threads.
    stack_size: usize = std.Thread.SpawnConfig.default_stack_size,
    /// Maximum thread pool size (excluding main thread) when dispatching async
    /// tasks. Until this limit, calls to `Io.async` when all threads are busy will
    /// cause a new thread to be spawned and permanently added to the pool. After
    /// this limit, calls to `Io.async` when all threads are busy run the task
    /// immediately.
    ///
    /// Defaults to one less than the number of logical CPU cores.
    ///
    /// Protected by `Threaded.mutex` once the I/O instance is already in use. See
    /// `setAsyncLimit`.
    async_limit: ?Io.Limit = null,
    /// Maximum thread pool size (excluding main thread) for dispatching concurrent
    /// tasks. Until this limit, calls to `Io.concurrent` will increase the thread
    /// pool size.
    ///
    /// After this number, calls to `Io.concurrent` return `error.ConcurrencyUnavailable`.
    concurrent_limit: Io.Limit = .unlimited,
    /// Affects the following operations:
    /// * `processExecutablePath` on OpenBSD and Haiku.
    argv0: Argv0 = .empty,
    /// Affects the following operations:
    /// * `fileIsTty`
    /// * `processExecutablePath` on OpenBSD and Haiku (observes "PATH").
    /// * `processSpawn`, `processSpawnPath`, `processReplace`, `processReplacePath`
    environ: process.Environ = .empty,
    /// If set to `true`, `File.MemoryMap` APIs will always take the fallback path.
    disable_memory_mapping: bool = false,
}