std: fix pthread_{get,set}name_np return type ABI

I believe this was accidentally broken when the E enum for errno values
was introduces. These functions are quite the special case in that they
return the error value directly rather than returning -1 and passing the
error value through the errno variable.

In any case, using a u16 as the return type at the ABI boundary where a
c_int is expected is asking for trouble.

Author: ifreund

lib/std/Thread.zig

@@ -75,7 +75,7 @@ pub fn setName(self: Thread, name: []const u8) SetNameError!void {
                 }
             } else {
                 const err = std.c.pthread_setname_np(self.getHandle(), name_with_terminator.ptr);
-                switch (err) {
+                switch (@as(posix.E, @enumFromInt(err))) {
                     .SUCCESS => return,
                     .RANGE => unreachable,
                     else => |e| return posix.unexpectedErrno(e),
@@ -119,14 +119,14 @@ pub fn setName(self: Thread, name: []const u8) SetNameError!void {
             if (self.getHandle() != std.c.pthread_self()) return error.Unsupported;
 
             const err = std.c.pthread_setname_np(name_with_terminator.ptr);
-            switch (err) {
+            switch (@as(posix.E, @enumFromInt(err))) {
                 .SUCCESS => return,
                 else => |e| return posix.unexpectedErrno(e),
             }
         },
         .netbsd, .solaris, .illumos => if (use_pthreads) {
             const err = std.c.pthread_setname_np(self.getHandle(), name_with_terminator.ptr, null);
-            switch (err) {
+            switch (@as(posix.E, @enumFromInt(err))) {
                 .SUCCESS => return,
                 .INVAL => unreachable,
                 .SRCH => unreachable,
@@ -144,7 +144,7 @@ pub fn setName(self: Thread, name: []const u8) SetNameError!void {
         },
         .dragonfly => if (use_pthreads) {
             const err = std.c.pthread_setname_np(self.getHandle(), name_with_terminator.ptr);
-            switch (err) {
+            switch (@as(posix.E, @enumFromInt(err))) {
                 .SUCCESS => return,
                 .INVAL => unreachable,
                 .FAULT => unreachable,
@@ -180,7 +180,7 @@ pub fn getName(self: Thread, buffer_ptr: *[max_name_len:0]u8) GetNameError!?[]co
                 }
             } else {
                 const err = std.c.pthread_getname_np(self.getHandle(), buffer.ptr, max_name_len + 1);
-                switch (err) {
+                switch (@as(posix.E, @enumFromInt(err))) {
                     .SUCCESS => return std.mem.sliceTo(buffer, 0),
                     .RANGE => unreachable,
                     else => |e| return posix.unexpectedErrno(e),
@@ -219,15 +219,15 @@ pub fn getName(self: Thread, buffer_ptr: *[max_name_len:0]u8) GetNameError!?[]co
         },
         .macos, .ios, .watchos, .tvos, .visionos => if (use_pthreads) {
             const err = std.c.pthread_getname_np(self.getHandle(), buffer.ptr, max_name_len + 1);
-            switch (err) {
+            switch (@as(posix.E, @enumFromInt(err))) {
                 .SUCCESS => return std.mem.sliceTo(buffer, 0),
                 .SRCH => unreachable,
                 else => |e| return posix.unexpectedErrno(e),
             }
         },
         .netbsd, .solaris, .illumos => if (use_pthreads) {
             const err = std.c.pthread_getname_np(self.getHandle(), buffer.ptr, max_name_len + 1);
-            switch (err) {
+            switch (@as(posix.E, @enumFromInt(err))) {
                 .SUCCESS => return std.mem.sliceTo(buffer, 0),
                 .INVAL => unreachable,
                 .SRCH => unreachable,
@@ -243,7 +243,7 @@ pub fn getName(self: Thread, buffer_ptr: *[max_name_len:0]u8) GetNameError!?[]co
         },
         .dragonfly => if (use_pthreads) {
             const err = std.c.pthread_getname_np(self.getHandle(), buffer.ptr, max_name_len + 1);
-            switch (err) {
+            switch (@as(posix.E, @enumFromInt(err))) {
                 .SUCCESS => return std.mem.sliceTo(buffer, 0),
                 .INVAL => unreachable,
                 .FAULT => unreachable,

lib/std/c/darwin.zig

@@ -851,8 +851,8 @@ pub const pthread_attr_t = extern struct {
 };
 
 pub extern "c" fn pthread_threadid_np(thread: ?std.c.pthread_t, thread_id: *u64) c_int;
-pub extern "c" fn pthread_setname_np(name: [*:0]const u8) E;
-pub extern "c" fn pthread_getname_np(thread: std.c.pthread_t, name: [*:0]u8, len: usize) E;
+pub extern "c" fn pthread_setname_np(name: [*:0]const u8) c_int;
+pub extern "c" fn pthread_getname_np(thread: std.c.pthread_t, name: [*:0]u8, len: usize) c_int;
 pub extern "c" fn pthread_attr_set_qos_class_np(attr: *pthread_attr_t, qos_class: qos_class_t, relative_priority: c_int) c_int;
 pub extern "c" fn pthread_attr_get_qos_class_np(attr: *pthread_attr_t, qos_class: *qos_class_t, relative_priority: *c_int) c_int;
 pub extern "c" fn pthread_set_qos_class_self_np(qos_class: qos_class_t, relative_priority: c_int) c_int;

lib/std/c/dragonfly.zig

@@ -29,8 +29,8 @@ pub const pthread_attr_t = extern struct { // copied from freebsd
 
 pub const sem_t = ?*opaque {};
 
-pub extern "c" fn pthread_setname_np(thread: std.c.pthread_t, name: [*:0]const u8) E;
-pub extern "c" fn pthread_getname_np(thread: std.c.pthread_t, name: [*:0]u8, len: usize) E;
+pub extern "c" fn pthread_setname_np(thread: std.c.pthread_t, name: [*:0]const u8) c_int;
+pub extern "c" fn pthread_getname_np(thread: std.c.pthread_t, name: [*:0]u8, len: usize) c_int;
 
 pub extern "c" fn umtx_sleep(ptr: *const volatile c_int, value: c_int, timeout: c_int) c_int;
 pub extern "c" fn umtx_wakeup(ptr: *const volatile c_int, count: c_int) c_int;

lib/std/c/linux.zig

@@ -318,8 +318,8 @@ pub const sem_t = extern struct {
 
 const __SIZEOF_SEM_T = 4 * @sizeOf(usize);
 
-pub extern "c" fn pthread_setname_np(thread: std.c.pthread_t, name: [*:0]const u8) E;
-pub extern "c" fn pthread_getname_np(thread: std.c.pthread_t, name: [*:0]u8, len: usize) E;
+pub extern "c" fn pthread_setname_np(thread: std.c.pthread_t, name: [*:0]const u8) c_int;
+pub extern "c" fn pthread_getname_np(thread: std.c.pthread_t, name: [*:0]u8, len: usize) c_int;
 
 pub const RTLD = struct {
     pub const LAZY = 1;

lib/std/c/netbsd.zig

@@ -51,8 +51,8 @@ pub const pthread_attr_t = extern struct {
 
 pub const sem_t = ?*opaque {};
 
-pub extern "c" fn pthread_setname_np(thread: std.c.pthread_t, name: [*:0]const u8, arg: ?*anyopaque) E;
-pub extern "c" fn pthread_getname_np(thread: std.c.pthread_t, name: [*:0]u8, len: usize) E;
+pub extern "c" fn pthread_setname_np(thread: std.c.pthread_t, name: [*:0]const u8, arg: ?*anyopaque) c_int;
+pub extern "c" fn pthread_getname_np(thread: std.c.pthread_t, name: [*:0]u8, len: usize) c_int;
 
 pub const blkcnt_t = i64;
 pub const blksize_t = i32;

lib/std/c/solaris.zig

@@ -34,8 +34,8 @@ pub const sem_t = extern struct {
     __pad2: [2]u64 = [_]u64{0} ** 2,
 };
 
-pub extern "c" fn pthread_setname_np(thread: std.c.pthread_t, name: [*:0]const u8, arg: ?*anyopaque) E;
-pub extern "c" fn pthread_getname_np(thread: std.c.pthread_t, name: [*:0]u8, len: usize) E;
+pub extern "c" fn pthread_setname_np(thread: std.c.pthread_t, name: [*:0]const u8, arg: ?*anyopaque) c_int;
+pub extern "c" fn pthread_getname_np(thread: std.c.pthread_t, name: [*:0]u8, len: usize) c_int;
 
 pub const blkcnt_t = i64;
 pub const blksize_t = i32;