Function with_syscall 

pub fn with_syscall<F, R>(f: F) -> R
where
    F: FnOnce() -> R,

Wrap a potentially-blocking operation so the go-lib scheduler can hand off this goroutine’s P to another M while the OS thread is in the kernel.

Calls [entersyscall][runtime::syscall::entersyscall] before f and [exitsyscall][runtime::syscall::exitsyscall] after f returns. This is a no-op when called outside the scheduler (before run).

Example

go_lib::run(|| {
    let data = go_lib::with_syscall(|| std::fs::read("file.txt"));
});