Get/set thread name for BSD.

Add the relevant routines for getting and setting thread name in
CFPlatform.

While we are doing this, change an #if branch in CFStream to set thread
name to using the actual routines declared in CFPlatform to do this.

Author: 3405691582

CoreFoundation/Base.subproj/CFPlatform.c

@@ -1616,6 +1616,9 @@ CF_CROSS_PLATFORM_EXPORT int _CFThreadSetName(_CFThreadRef thread, const char *_
     return 0;
 #elif TARGET_OS_LINUX
     return pthread_setname_np(thread, name);
+#elif TARGET_OS_BSD
+    pthread_set_name_np(thread, name);
+    return 0;
 #endif
 }
 
@@ -1635,6 +1638,9 @@ CF_CROSS_PLATFORM_EXPORT int _CFThreadGetName(char *buf, int length) {
     return 0;
 #elif TARGET_OS_LINUX
     return pthread_getname_np(pthread_self(), buf, length);
+#elif TARGET_OS_BSD
+    pthread_get_name_np(pthread_self(), buf, length);
+    return 0;
 #elif TARGET_OS_WIN32
     *buf = '\0';
 

CoreFoundation/Stream.subproj/CFStream.c

@@ -1675,11 +1675,7 @@ static void _perform(void* info)
 
 static void* _legacyStreamRunLoop_workThread(void* arg)
 {
-#if TARGET_OS_LINUX
-    pthread_setname_np(pthread_self(), "com.apple.CFStream.LegacyThread");
-#else
-    pthread_setname_np("com.apple.CFStream.LegacyThread");
-#endif
+    _CFThreadSetName(pthread_self(), "com.apple.CFStream.LegacyThread");
     sLegacyRL = CFRunLoopGetCurrent();
 
 #if defined(LOG_STREAM)

Tests/Foundation/Tests/TestThread.swift

@@ -56,6 +56,9 @@ class TestThread : XCTestCase {
 #if os(Linux) || os(Android) // Linux sets the initial thread name to the process name.
         XCTAssertEqual(Thread.current.name, "TestFoundation")
         testInternalThreadName("TestFoundation")
+#elseif os(OpenBSD) // OpenBSD sets the initial thread name to this.
+        XCTAssertEqual(Thread.current.name, "Original thread")
+        testInternalThreadName("Original thread")
 #else
         // No name is set initially
         XCTAssertEqual(Thread.current.name, "")