mirror of https://github.com/denoland/deno.git
44 lines
1.1 KiB
Rust
44 lines
1.1 KiB
Rust
// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
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/// Raise soft file descriptor limit to hard file descriptor limit.
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/// This is the difference between `ulimit -n` and `ulimit -n -H`.
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pub fn raise_fd_limit() {
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#[cfg(unix)]
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unsafe {
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let mut limits = libc::rlimit {
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rlim_cur: 0,
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rlim_max: 0,
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};
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if 0 != libc::getrlimit(libc::RLIMIT_NOFILE, &mut limits) {
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return;
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}
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if limits.rlim_cur == libc::RLIM_INFINITY {
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return;
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}
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// No hard limit? Do a binary search for the effective soft limit.
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if limits.rlim_max == libc::RLIM_INFINITY {
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let mut min = limits.rlim_cur;
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let mut max = 1 << 20;
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while min + 1 < max {
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limits.rlim_cur = min + (max - min) / 2;
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match libc::setrlimit(libc::RLIMIT_NOFILE, &limits) {
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0 => min = limits.rlim_cur,
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_ => max = limits.rlim_cur,
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}
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}
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return;
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}
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// Raise the soft limit to the hard limit.
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if limits.rlim_cur < limits.rlim_max {
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limits.rlim_cur = limits.rlim_max;
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libc::setrlimit(libc::RLIMIT_NOFILE, &limits);
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}
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}
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}
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