--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/druntime/import/core/sys/osx/mach/thread_act.d	Tue Jun 02 17:43:06 2009 +0100
@@ -0,0 +1,124 @@
+/**
+ * D header file for OSX.
+ *
+ * Copyright: Copyright Sean Kelly 2008 - 2009.
+ * License:   <a href="http://www.boost.org/LICENSE_1_0.txt>Boost License 1.0</a>.
+ * Authors:   Sean Kelly
+ *
+ *          Copyright Sean Kelly 2008 - 2009.
+ * Distributed under the Boost Software License, Version 1.0.
+ *    (See accompanying file LICENSE_1_0.txt or copy at
+ *          http://www.boost.org/LICENSE_1_0.txt)
+ */
+module core.sys.osx.mach.thread_act;
+
+public import core.sys.osx.mach.kern_return;
+public import core.sys.osx.mach.port;
+
+extern (C):
+
+version( X86 )
+    version = i386;
+version( X86_64 )
+    version = i386;
+version( i386 )
+{
+    alias mach_port_t thread_act_t;
+    alias void        thread_state_t;
+    alias int         thread_state_flavor_t;
+    alias natural_t   mach_msg_type_number_t;
+
+    enum
+    {
+        x86_THREAD_STATE32      = 1,
+        x86_FLOAT_STATE32       = 2,
+        x86_EXCEPTION_STATE32   = 3,
+        x86_THREAD_STATE64      = 4,
+        x86_FLOAT_STATE64       = 5,
+        x86_EXCEPTION_STATE64   = 6,
+        x86_THREAD_STATE        = 7,
+        x86_FLOAT_STATE         = 8,
+        x86_EXCEPTION_STATE     = 9,
+        x86_DEBUG_STATE32       = 10,
+        x86_DEBUG_STATE64       = 11,
+        x86_DEBUG_STATE         = 12,
+        THREAD_STATE_NONE       = 13,
+    }
+
+    struct x86_thread_state32_t
+    {
+        uint    eax;
+        uint    ebx;
+        uint    ecx;
+        uint    edx;
+        uint    edi;
+        uint    esi;
+        uint    ebp;
+        uint    esp;
+        uint    ss;
+        uint    eflags;
+        uint    eip;
+        uint    cs;
+        uint    ds;
+        uint    es;
+        uint    fs;
+        uint    gs;
+    }
+
+    struct x86_thread_state64_t
+    {
+        ulong   rax;
+        ulong   rbx;
+        ulong   rcx;
+        ulong   rdx;
+        ulong   rdi;
+        ulong   rsi;
+        ulong   rbp;
+        ulong   rsp;
+        ulong   r8;
+        ulong   r9;
+        ulong   r10;
+        ulong   r11;
+        ulong   r12;
+        ulong   r13;
+        ulong   r14;
+        ulong   r15;
+        ulong   rip;
+        ulong   rflags;
+        ulong   cs;
+        ulong   fs;
+        ulong   gs;
+    }
+
+    struct x86_state_hdr_t
+    {
+        int     flavor;
+        int     count;
+    }
+
+    struct x86_thread_state_t
+    {
+        x86_state_hdr_t             tsh;
+        union _uts
+        {
+            x86_thread_state32_t    ts32;
+            x86_thread_state64_t    ts64;
+        }
+        _uts                        uts;
+    }
+
+    enum : mach_msg_type_number_t
+    {
+        x86_THREAD_STATE32_COUNT = cast(mach_msg_type_number_t)( x86_thread_state32_t.sizeof / int.sizeof ),
+        x86_THREAD_STATE64_COUNT = cast(mach_msg_type_number_t)( x86_thread_state64_t.sizeof / int.sizeof ),
+        x86_THREAD_STATE_COUNT   = cast(mach_msg_type_number_t)( x86_thread_state_t.sizeof / int.sizeof ),
+    }
+
+    alias x86_THREAD_STATE          MACHINE_THREAD_STATE;
+    alias x86_THREAD_STATE_COUNT    MACHINE_THREAD_STATE_COUNT;
+
+    mach_port_t   mach_thread_self();
+    kern_return_t thread_suspend(thread_act_t);
+    kern_return_t thread_resume(thread_act_t);
+    kern_return_t thread_get_state(thread_act_t, thread_state_flavor_t, thread_state_t*, mach_msg_type_number_t*);
+}