mach2 0.7.0

A Rust interface to the user-space API of the Mach 3.0 kernel that underlies OSX.
Documentation 
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//! This module corresponds to `mach/semaphore.h`

use crate::clock_types::mach_timespec_t;
use crate::kern_return::kern_return_t;
use crate::mach_types::{semaphore_t, task_t};
use crate::sync_policy::sync_policy_t;
use core::ffi::c_int;

unsafe extern "C" {
    pub fn semaphore_create(
        task: task_t,
        semaphore: *mut semaphore_t,
        policy: sync_policy_t,
        value: c_int,
    ) -> kern_return_t;
    pub fn semaphore_signal(semaphore: semaphore_t) -> kern_return_t;
    pub fn semaphore_wait(semaphore: semaphore_t) -> kern_return_t;
    pub fn semaphore_timedwait(semaphore: semaphore_t, timeout: mach_timespec_t) -> kern_return_t;
    pub fn semaphore_destroy(task: task_t, semaphore: semaphore_t) -> kern_return_t;
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn semaphore_function_signatures() {
        let _: unsafe extern "C" fn(semaphore_t) -> kern_return_t = semaphore_signal;
        let _: unsafe extern "C" fn(semaphore_t) -> kern_return_t = semaphore_wait;
        let _: unsafe extern "C" fn(semaphore_t, mach_timespec_t) -> kern_return_t =
            semaphore_timedwait;
        let _: unsafe extern "C" fn(task_t, semaphore_t) -> kern_return_t = semaphore_destroy;
    }
}