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Diffstat (limited to 'src/libstd/sys/unix/thread.rs')
-rw-r--r--src/libstd/sys/unix/thread.rs172
1 files changed, 96 insertions, 76 deletions
diff --git a/src/libstd/sys/unix/thread.rs b/src/libstd/sys/unix/thread.rs
index 72b0ac493da..a5b34eeec28 100644
--- a/src/libstd/sys/unix/thread.rs
+++ b/src/libstd/sys/unix/thread.rs
@@ -25,21 +25,24 @@ unsafe impl Sync for Thread {}
 // The pthread_attr_setstacksize symbol doesn't exist in the emscripten libc,
 // so we have to not link to it to satisfy emcc's ERROR_ON_UNDEFINED_SYMBOLS.
 #[cfg(not(target_os = "emscripten"))]
-unsafe fn pthread_attr_setstacksize(attr: *mut libc::pthread_attr_t,
-                                    stack_size: libc::size_t) -> libc::c_int {
+unsafe fn pthread_attr_setstacksize(
+    attr: *mut libc::pthread_attr_t,
+    stack_size: libc::size_t,
+) -> libc::c_int {
     libc::pthread_attr_setstacksize(attr, stack_size)
 }
 
 #[cfg(target_os = "emscripten")]
-unsafe fn pthread_attr_setstacksize(_attr: *mut libc::pthread_attr_t,
-                                    _stack_size: libc::size_t) -> libc::c_int {
+unsafe fn pthread_attr_setstacksize(
+    _attr: *mut libc::pthread_attr_t,
+    _stack_size: libc::size_t,
+) -> libc::c_int {
     panic!()
 }
 
 impl Thread {
     // unsafe: see thread::Builder::spawn_unchecked for safety requirements
-    pub unsafe fn new(stack: usize, p: Box<dyn FnOnce()>)
-                          -> io::Result<Thread> {
+    pub unsafe fn new(stack: usize, p: Box<dyn FnOnce()>) -> io::Result<Thread> {
         let p = box p;
         let mut native: libc::pthread_t = mem::zeroed();
         let mut attr: libc::pthread_attr_t = mem::zeroed();
@@ -47,8 +50,7 @@ impl Thread {
 
         let stack_size = cmp::max(stack, min_stack_size(&attr));
 
-        match pthread_attr_setstacksize(&mut attr,
-                                        stack_size) {
+        match pthread_attr_setstacksize(&mut attr, stack_size) {
             0 => {}
             n => {
                 assert_eq!(n, libc::EINVAL);
@@ -57,15 +59,13 @@ impl Thread {
                 // >= PTHREAD_STACK_MIN, it must be an alignment issue.
                 // Round up to the nearest page and try again.
                 let page_size = os::page_size();
-                let stack_size = (stack_size + page_size - 1) &
-                                 (-(page_size as isize - 1) as usize - 1);
-                assert_eq!(libc::pthread_attr_setstacksize(&mut attr,
-                                                           stack_size), 0);
+                let stack_size =
+                    (stack_size + page_size - 1) & (-(page_size as isize - 1) as usize - 1);
+                assert_eq!(libc::pthread_attr_setstacksize(&mut attr, stack_size), 0);
             }
         };
 
-        let ret = libc::pthread_create(&mut native, &attr, thread_start,
-                                       &*p as *const _ as *mut _);
+        let ret = libc::pthread_create(&mut native, &attr, thread_start, &*p as *const _ as *mut _);
         assert_eq!(libc::pthread_attr_destroy(&mut attr), 0);
 
         return if ret != 0 {
@@ -75,8 +75,10 @@ impl Thread {
             Ok(Thread { id: native })
         };
 
-        extern fn thread_start(main: *mut libc::c_void) -> *mut libc::c_void {
-            unsafe { start_thread(main as *mut u8); }
+        extern "C" fn thread_start(main: *mut libc::c_void) -> *mut libc::c_void {
+            unsafe {
+                start_thread(main as *mut u8);
+            }
             ptr::null_mut()
         }
     }
@@ -86,8 +88,7 @@ impl Thread {
         debug_assert_eq!(ret, 0);
     }
 
-    #[cfg(any(target_os = "linux",
-              target_os = "android"))]
+    #[cfg(any(target_os = "linux", target_os = "android"))]
     pub fn set_name(name: &CStr) {
         const PR_SET_NAME: libc::c_int = 15;
         // pthread wrapper only appeared in glibc 2.12, so we use syscall
@@ -97,9 +98,7 @@ impl Thread {
         }
     }
 
-    #[cfg(any(target_os = "freebsd",
-              target_os = "dragonfly",
-              target_os = "openbsd"))]
+    #[cfg(any(target_os = "freebsd", target_os = "dragonfly", target_os = "openbsd"))]
     pub fn set_name(name: &CStr) {
         unsafe {
             libc::pthread_set_name_np(libc::pthread_self(), name.as_ptr());
@@ -118,8 +117,11 @@ impl Thread {
         use crate::ffi::CString;
         let cname = CString::new(&b"%s"[..]).unwrap();
         unsafe {
-            libc::pthread_setname_np(libc::pthread_self(), cname.as_ptr(),
-                                     name.as_ptr() as *mut libc::c_void);
+            libc::pthread_setname_np(
+                libc::pthread_self(),
+                cname.as_ptr(),
+                name.as_ptr() as *mut libc::c_void,
+            );
         }
     }
 
@@ -132,15 +134,19 @@ impl Thread {
         }
 
         if let Some(f) = pthread_setname_np.get() {
-            unsafe { f(libc::pthread_self(), name.as_ptr()); }
+            unsafe {
+                f(libc::pthread_self(), name.as_ptr());
+            }
         }
     }
 
-    #[cfg(any(target_env = "newlib",
-              target_os = "haiku",
-              target_os = "l4re",
-              target_os = "emscripten",
-              target_os = "redox"))]
+    #[cfg(any(
+        target_env = "newlib",
+        target_os = "haiku",
+        target_os = "l4re",
+        target_os = "emscripten",
+        target_os = "redox"
+    ))]
     pub fn set_name(_name: &CStr) {
         // Newlib, Illumos, Haiku, and Emscripten have no way to set a thread name.
     }
@@ -177,12 +183,13 @@ impl Thread {
         unsafe {
             let ret = libc::pthread_join(self.id, ptr::null_mut());
             mem::forget(self);
-            assert!(ret == 0,
-                    "failed to join thread: {}", io::Error::from_raw_os_error(ret));
+            assert!(ret == 0, "failed to join thread: {}", io::Error::from_raw_os_error(ret));
         }
     }
 
-    pub fn id(&self) -> libc::pthread_t { self.id }
+    pub fn id(&self) -> libc::pthread_t {
+        self.id
+    }
 
     pub fn into_id(self) -> libc::pthread_t {
         let id = self.id;
@@ -198,31 +205,38 @@ impl Drop for Thread {
     }
 }
 
-#[cfg(all(not(all(target_os = "linux", not(target_env = "musl"))),
-          not(target_os = "freebsd"),
-          not(target_os = "macos"),
-          not(all(target_os = "netbsd", not(target_vendor = "rumprun"))),
-          not(target_os = "openbsd"),
-          not(target_os = "solaris")))]
+#[cfg(all(
+    not(all(target_os = "linux", not(target_env = "musl"))),
+    not(target_os = "freebsd"),
+    not(target_os = "macos"),
+    not(all(target_os = "netbsd", not(target_vendor = "rumprun"))),
+    not(target_os = "openbsd"),
+    not(target_os = "solaris")
+))]
 #[cfg_attr(test, allow(dead_code))]
 pub mod guard {
     use crate::ops::Range;
     pub type Guard = Range<usize>;
-    pub unsafe fn current() -> Option<Guard> { None }
-    pub unsafe fn init() -> Option<Guard> { None }
+    pub unsafe fn current() -> Option<Guard> {
+        None
+    }
+    pub unsafe fn init() -> Option<Guard> {
+        None
+    }
 }
 
-
-#[cfg(any(all(target_os = "linux", not(target_env = "musl")),
-          target_os = "freebsd",
-          target_os = "macos",
-          all(target_os = "netbsd", not(target_vendor = "rumprun")),
-          target_os = "openbsd",
-          target_os = "solaris"))]
+#[cfg(any(
+    all(target_os = "linux", not(target_env = "musl")),
+    target_os = "freebsd",
+    target_os = "macos",
+    all(target_os = "netbsd", not(target_vendor = "rumprun")),
+    target_os = "openbsd",
+    target_os = "solaris"
+))]
 #[cfg_attr(test, allow(dead_code))]
 pub mod guard {
     use libc::{mmap, mprotect};
-    use libc::{PROT_NONE, PROT_READ, PROT_WRITE, MAP_PRIVATE, MAP_ANON, MAP_FAILED, MAP_FIXED};
+    use libc::{MAP_ANON, MAP_FAILED, MAP_FIXED, MAP_PRIVATE, PROT_NONE, PROT_READ, PROT_WRITE};
 
     use crate::ops::Range;
     use crate::sys::os;
@@ -241,16 +255,15 @@ pub mod guard {
 
     #[cfg(target_os = "macos")]
     unsafe fn get_stack_start() -> Option<*mut libc::c_void> {
-        let stackaddr = libc::pthread_get_stackaddr_np(libc::pthread_self()) as usize -
-             libc::pthread_get_stacksize_np(libc::pthread_self());
+        let stackaddr = libc::pthread_get_stackaddr_np(libc::pthread_self()) as usize
+            - libc::pthread_get_stacksize_np(libc::pthread_self());
         Some(stackaddr as *mut libc::c_void)
     }
 
     #[cfg(target_os = "openbsd")]
     unsafe fn get_stack_start() -> Option<*mut libc::c_void> {
         let mut current_stack: libc::stack_t = crate::mem::zeroed();
-        assert_eq!(libc::pthread_stackseg_np(libc::pthread_self(),
-                                             &mut current_stack), 0);
+        assert_eq!(libc::pthread_stackseg_np(libc::pthread_self(), &mut current_stack), 0);
 
         let stackaddr = if libc::pthread_main_np() == 1 {
             // main thread
@@ -262,21 +275,25 @@ pub mod guard {
         Some(stackaddr as *mut libc::c_void)
     }
 
-    #[cfg(any(target_os = "android", target_os = "freebsd",
-              target_os = "linux", target_os = "netbsd", target_os = "l4re"))]
+    #[cfg(any(
+        target_os = "android",
+        target_os = "freebsd",
+        target_os = "linux",
+        target_os = "netbsd",
+        target_os = "l4re"
+    ))]
     unsafe fn get_stack_start() -> Option<*mut libc::c_void> {
         let mut ret = None;
         let mut attr: libc::pthread_attr_t = crate::mem::zeroed();
         assert_eq!(libc::pthread_attr_init(&mut attr), 0);
         #[cfg(target_os = "freebsd")]
-            let e = libc::pthread_attr_get_np(libc::pthread_self(), &mut attr);
+        let e = libc::pthread_attr_get_np(libc::pthread_self(), &mut attr);
         #[cfg(not(target_os = "freebsd"))]
-            let e = libc::pthread_getattr_np(libc::pthread_self(), &mut attr);
+        let e = libc::pthread_getattr_np(libc::pthread_self(), &mut attr);
         if e == 0 {
             let mut stackaddr = crate::ptr::null_mut();
             let mut stacksize = 0;
-            assert_eq!(libc::pthread_attr_getstack(&attr, &mut stackaddr,
-                                                   &mut stacksize), 0);
+            assert_eq!(libc::pthread_attr_getstack(&attr, &mut stackaddr, &mut stacksize), 0);
             ret = Some(stackaddr);
         }
         assert_eq!(libc::pthread_attr_destroy(&mut attr), 0);
@@ -329,8 +346,14 @@ pub mod guard {
             // than the initial mmap() used, so we mmap() here with
             // read/write permissions and only then mprotect() it to
             // no permissions at all. See issue #50313.
-            let result = mmap(stackaddr, PAGE_SIZE, PROT_READ | PROT_WRITE,
-                              MAP_PRIVATE | MAP_ANON | MAP_FIXED, -1, 0);
+            let result = mmap(
+                stackaddr,
+                PAGE_SIZE,
+                PROT_READ | PROT_WRITE,
+                MAP_PRIVATE | MAP_ANON | MAP_FIXED,
+                -1,
+                0,
+            );
             if result != stackaddr || result == MAP_FAILED {
                 panic!("failed to allocate a guard page");
             }
@@ -341,34 +364,33 @@ pub mod guard {
             }
 
             let guardaddr = stackaddr as usize;
-            let offset = if cfg!(target_os = "freebsd") {
-                2
-            } else {
-                1
-            };
+            let offset = if cfg!(target_os = "freebsd") { 2 } else { 1 };
 
             Some(guardaddr..guardaddr + offset * PAGE_SIZE)
         }
     }
 
-    #[cfg(any(target_os = "macos",
-              target_os = "openbsd",
-              target_os = "solaris"))]
+    #[cfg(any(target_os = "macos", target_os = "openbsd", target_os = "solaris"))]
     pub unsafe fn current() -> Option<Guard> {
         let stackaddr = get_stack_start()? as usize;
         Some(stackaddr - PAGE_SIZE..stackaddr)
     }
 
-    #[cfg(any(target_os = "android", target_os = "freebsd",
-              target_os = "linux", target_os = "netbsd", target_os = "l4re"))]
+    #[cfg(any(
+        target_os = "android",
+        target_os = "freebsd",
+        target_os = "linux",
+        target_os = "netbsd",
+        target_os = "l4re"
+    ))]
     pub unsafe fn current() -> Option<Guard> {
         let mut ret = None;
         let mut attr: libc::pthread_attr_t = crate::mem::zeroed();
         assert_eq!(libc::pthread_attr_init(&mut attr), 0);
         #[cfg(target_os = "freebsd")]
-            let e = libc::pthread_attr_get_np(libc::pthread_self(), &mut attr);
+        let e = libc::pthread_attr_get_np(libc::pthread_self(), &mut attr);
         #[cfg(not(target_os = "freebsd"))]
-            let e = libc::pthread_getattr_np(libc::pthread_self(), &mut attr);
+        let e = libc::pthread_getattr_np(libc::pthread_self(), &mut attr);
         if e == 0 {
             let mut guardsize = 0;
             assert_eq!(libc::pthread_attr_getguardsize(&attr, &mut guardsize), 0);
@@ -377,8 +399,7 @@ pub mod guard {
             }
             let mut stackaddr = crate::ptr::null_mut();
             let mut size = 0;
-            assert_eq!(libc::pthread_attr_getstack(&attr, &mut stackaddr,
-                                                   &mut size), 0);
+            assert_eq!(libc::pthread_attr_getstack(&attr, &mut stackaddr, &mut size), 0);
 
             let stackaddr = stackaddr as usize;
             ret = if cfg!(target_os = "freebsd") {
@@ -422,8 +443,7 @@ fn min_stack_size(attr: *const libc::pthread_attr_t) -> usize {
 
 // No point in looking up __pthread_get_minstack() on non-glibc
 // platforms.
-#[cfg(all(not(target_os = "linux"),
-          not(target_os = "netbsd")))]
+#[cfg(all(not(target_os = "linux"), not(target_os = "netbsd")))]
 fn min_stack_size(_: *const libc::pthread_attr_t) -> usize {
     libc::PTHREAD_STACK_MIN
 }
generated by cgit-pink 1.4.1-3-g733a5 (git 2.37.1) at 2025-10-27 17:09:24 +0000