diff options
Diffstat (limited to 'vendor/num_threads')
| -rw-r--r-- | vendor/num_threads/.cargo-checksum.json | 1 | ||||
| -rw-r--r-- | vendor/num_threads/Cargo.toml | 36 | ||||
| -rw-r--r-- | vendor/num_threads/LICENSE-Apache | 202 | ||||
| -rw-r--r-- | vendor/num_threads/LICENSE-MIT | 19 | ||||
| -rw-r--r-- | vendor/num_threads/src/apple.rs | 45 | ||||
| -rw-r--r-- | vendor/num_threads/src/freebsd.rs | 36 | ||||
| -rw-r--r-- | vendor/num_threads/src/imp.rs | 7 | ||||
| -rw-r--r-- | vendor/num_threads/src/lib.rs | 64 | ||||
| -rw-r--r-- | vendor/num_threads/src/linux.rs | 14 |
9 files changed, 424 insertions, 0 deletions
diff --git a/vendor/num_threads/.cargo-checksum.json b/vendor/num_threads/.cargo-checksum.json new file mode 100644 index 000000000..603e1c7e7 --- /dev/null +++ b/vendor/num_threads/.cargo-checksum.json @@ -0,0 +1 @@ +{"files":{"Cargo.toml":"ed1dbfb8f9eb836549858fb0ca704eddaa480cbe576e8dd50ebca1529dca21b3","LICENSE-Apache":"c69b72788ec261765e460532016b4bb78372f238e449b5e70e3268ec1e18fd15","LICENSE-MIT":"b4bf94a9fceb8846320fda938ee53fc16b506572609da5cf1d2d289a5597a8f8","src/apple.rs":"018e729ea67e8e17428d2e8d93f28ed0f7e7c506fcf78b56f56113235ce7dfcf","src/freebsd.rs":"683636294a62d6b958a5de800b52ddfea609234921e0583906272aacc71e18e5","src/imp.rs":"8cc9d07f05b0aa70e9997648abce7f79bd758c6fc76040d1c8f7beb7bf551e9d","src/lib.rs":"c53382612069b9552846414d1508cbb1401c500a4f34e21addd336001ebd8b7e","src/linux.rs":"67e02ecd105b8a421227bf72814e8388a4f77df1d8a44b8902bc8926f7e6698c"},"package":"2819ce041d2ee131036f4fc9d6ae7ae125a3a40e97ba64d04fe799ad9dabbb44"}
\ No newline at end of file diff --git a/vendor/num_threads/Cargo.toml b/vendor/num_threads/Cargo.toml new file mode 100644 index 000000000..abfb41e97 --- /dev/null +++ b/vendor/num_threads/Cargo.toml @@ -0,0 +1,36 @@ +# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO +# +# When uploading crates to the registry Cargo will automatically +# "normalize" Cargo.toml files for maximal compatibility +# with all versions of Cargo and also rewrite `path` dependencies +# to registry (e.g., crates.io) dependencies. +# +# If you are reading this file be aware that the original Cargo.toml +# will likely look very different (and much more reasonable). +# See Cargo.toml.orig for the original contents. + +[package] +name = "num_threads" +version = "0.1.6" +authors = ["Jacob Pratt <open-source@jhpratt.dev>"] +include = [ + "src/**/*", + "LICENSE-*", +] +description = "A minimal library that determines the number of running threads for the current process." +categories = [ + "api-bindings", + "hardware-support", + "os", +] +license = "MIT OR Apache-2.0" +repository = "https://github.com/jhpratt/num_threads" + +[package.metadata.docs.rs] +all-features = true +targets = ["x86_64-unknown-linux-gnu"] + +[dependencies] + +[target."cfg(any(target_os = \"macos\", target_os = \"ios\", target_os = \"freebsd\"))".dependencies.libc] +version = "0.2.107" diff --git a/vendor/num_threads/LICENSE-Apache b/vendor/num_threads/LICENSE-Apache new file mode 100644 index 000000000..8119b40f3 --- /dev/null +++ b/vendor/num_threads/LICENSE-Apache @@ -0,0 +1,202 @@ + + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/vendor/num_threads/src/apple.rs b/vendor/num_threads/src/apple.rs new file mode 100644 index 000000000..8d71b542d --- /dev/null +++ b/vendor/num_threads/src/apple.rs @@ -0,0 +1,45 @@ +extern crate libc; + +use std::num::NonZeroUsize; + +use self::libc::{kern_return_t, mach_msg_type_number_t, mach_port_t, thread_t}; + +// This constant is from +// /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/ +// usr/include/mach/machine/thread_state.h. +// +// It has not been updated since Apple devices started to support 64-bit ARM (iOS), so it +// should be very stable. +const THREAD_STATE_MAX: i32 = 1296; +#[allow(non_camel_case_types)] +// https://github.com/apple/darwin-xnu/blob/a1babec6b135d1f35b2590a1990af3c5c5393479/osfmk/mach/mach_types.defs#L155 +type task_inspect_t = mach_port_t; +#[allow(non_camel_case_types)] +// https://github.com/apple/darwin-xnu/blob/a1babec6b135d1f35b2590a1990af3c5c5393479/osfmk/mach/mach_types.defs#L238 +type thread_array_t = [thread_t; THREAD_STATE_MAX as usize]; + +extern "C" { + // https://developer.apple.com/documentation/kernel/1537751-task_threads/ + fn task_threads( + target_task: task_inspect_t, + act_list: *mut thread_array_t, + act_listCnt: *mut mach_msg_type_number_t, + ) -> kern_return_t; +} + +pub(crate) fn num_threads() -> Option<NonZeroUsize> { + // http://web.mit.edu/darwin/src/modules/xnu/osfmk/man/task_threads.html + let mut thread_state = [0u32; THREAD_STATE_MAX as usize]; + let mut thread_count = 0; + + // Safety: `mach_task_self` always returns a valid value, `thread_state` is large enough, and + // both it and `thread_count` are writable. + let result = + unsafe { task_threads(libc::mach_task_self(), &mut thread_state, &mut thread_count) }; + + if result == libc::KERN_SUCCESS { + NonZeroUsize::new(thread_count as usize) + } else { + None + } +} diff --git a/vendor/num_threads/src/freebsd.rs b/vendor/num_threads/src/freebsd.rs new file mode 100644 index 000000000..1c3cbc82e --- /dev/null +++ b/vendor/num_threads/src/freebsd.rs @@ -0,0 +1,36 @@ +extern crate libc; + +use std::num::NonZeroUsize; +use std::{mem, ptr}; + +pub(crate) fn num_threads() -> Option<NonZeroUsize> { + // Safety: `sysctl` and `getpid` are both thread-safe. + // `kip` is only accessed if sysctl() succeeds and agrees with the expected size, + // and the data only trusted if both its embedded size and pid match expectations + unsafe { + let pid = libc::getpid(); + let mib: [libc::c_int; 4] = [libc::CTL_KERN, libc::KERN_PROC, libc::KERN_PROC_PID, pid]; + let mut kip: libc::kinfo_proc = mem::zeroed(); + let expected_kip_len = mem::size_of_val(&kip); + let mut kip_len = expected_kip_len; + + let ret = libc::sysctl( + mib.as_ptr(), + mib.len() as u32, + &mut kip as *mut _ as *mut libc::c_void, + &mut kip_len, + ptr::null(), + 0, + ); + + if ret == 0 + && kip_len == expected_kip_len + && kip.ki_structsize == expected_kip_len as i32 + && kip.ki_pid == pid + { + NonZeroUsize::new(kip.ki_numthreads as usize) + } else { + None + } + } +} diff --git a/vendor/num_threads/src/imp.rs b/vendor/num_threads/src/imp.rs new file mode 100644 index 000000000..b12465d49 --- /dev/null +++ b/vendor/num_threads/src/imp.rs @@ -0,0 +1,7 @@ +//! Fallback if no OS matches. + +use std::num::NonZeroUsize; + +pub(crate) fn num_threads() -> Option<NonZeroUsize> { + None +} diff --git a/vendor/num_threads/src/lib.rs b/vendor/num_threads/src/lib.rs new file mode 100644 index 000000000..c21380282 --- /dev/null +++ b/vendor/num_threads/src/lib.rs @@ -0,0 +1,64 @@ +//! Minimum supported Rust version: 1.28 + +use std::num::NonZeroUsize; + +#[cfg_attr(any(target_os = "linux", target_os = "android"), path = "linux.rs")] +#[cfg_attr(target_os = "freebsd", path = "freebsd.rs")] +#[cfg_attr(any(target_os = "macos", target_os = "ios"), path = "apple.rs")] +mod imp; + +/// Obtain the number of threads currently part of the active process. Returns `None` if the number +/// of threads cannot be determined. +pub fn num_threads() -> Option<NonZeroUsize> { + imp::num_threads() +} + +/// Determine if the current process is single-threaded. Returns `None` if the number of threads +/// cannot be determined. +pub fn is_single_threaded() -> Option<bool> { + num_threads().map(|n| n.get() == 1) +} + +#[cfg(test)] +mod test { + use std::num::NonZeroUsize; + + // Run each expression in its own thread. + macro_rules! threaded { + ($first:expr;) => { + $first; + }; + ($first:expr; $($rest:expr;)*) => { + $first; + ::std::thread::spawn(|| { + threaded!($($rest;)*); + }) + .join() + .unwrap(); + }; + } + + #[test] + fn num_threads() { + threaded! { + assert_eq!(super::num_threads().map(NonZeroUsize::get), Some(1)); + assert_eq!(super::num_threads().map(NonZeroUsize::get), Some(2)); + assert_eq!(super::num_threads().map(NonZeroUsize::get), Some(3)); + assert_eq!(super::num_threads().map(NonZeroUsize::get), Some(4)); + assert_eq!(super::num_threads().map(NonZeroUsize::get), Some(5)); + assert_eq!(super::num_threads().map(NonZeroUsize::get), Some(6)); + } + } + + #[test] + fn is_single_threaded() { + threaded! { + assert_eq!(super::is_single_threaded(), Some(true)); + assert_eq!(super::is_single_threaded(), Some(false)); + assert_eq!(super::is_single_threaded(), Some(false)); + assert_eq!(super::is_single_threaded(), Some(false)); + assert_eq!(super::is_single_threaded(), Some(false)); + assert_eq!(super::is_single_threaded(), Some(false)); + } + } +} diff --git a/vendor/num_threads/src/linux.rs b/vendor/num_threads/src/linux.rs new file mode 100644 index 000000000..641b6b129 --- /dev/null +++ b/vendor/num_threads/src/linux.rs @@ -0,0 +1,14 @@ +use std::fs; +use std::num::NonZeroUsize; + +pub(crate) fn num_threads() -> Option<NonZeroUsize> { + fs::read_to_string("/proc/self/stat") + .ok() + .as_ref() + // Skip past the pid and (process name) fields + .and_then(|stat| stat.rsplit(')').next()) + // 20th field, less the two we skipped + .and_then(|rstat| rstat.split_whitespace().nth(17)) + .and_then(|num_threads| num_threads.parse::<usize>().ok()) + .and_then(NonZeroUsize::new) +} |