This removes the inline assembly code for find_thread

from OS.h, sorry for triggering a complete rebuild.
To avoid doing a syscall for find_thread(0), the assembly
version is now in libroot. For BeOS R5 compatibility, 
_kfind_thread_ is retained. This will fix some compile 
problems, and provides a cleaner OS.h for future Haiku
versions.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@14014 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/os/kernel/OS.h

@@ -296,29 +296,7 @@ extern void			exit_thread(status_t status);
 extern status_t		wait_for_thread (thread_id thread, status_t *threadReturnValue);
 extern status_t		on_exit_thread(void (*callback)(void *), void *data);
 
-#if __INTEL__ && !_KERNEL_MODE && !_NO_INLINE_ASM
-static inline thread_id
-find_thread(const char *name) {
-#	ifndef __HAIKU__
-/* ToDo: this can be removed once we don't need BeOS compatibility of our source files */
-#		define _kern_find_thread _kfind_thread_
-#	endif
-	extern thread_id _kern_find_thread(const char *name);
-	if (!name) {
-		thread_id thread;
-		__asm__ __volatile__ ( 
-			"movl	%%fs:4, %%eax \n\t"
-			: "=a" (thread));
-		return thread;
-	}
-	return _kern_find_thread(name);
-#	ifndef __HAIKU__
-#		undef _kern_find_thread
-#	endif
-}
-#else
 extern thread_id 	find_thread(const char *name);
-#endif
 
 extern status_t		send_data(thread_id thread, int32 code, const void *buffer,
 						size_t bufferSize);

src/system/libroot/os/arch/ppc/Jamfile

@@ -5,6 +5,7 @@ KernelMergeObject os_arch_$(OBOS_ARCH).o :
 	<$(SOURCE_GRIST)>byteorder.S
 #	<$(SOURCE_GRIST)>systeminfo.c
 	<$(SOURCE_GRIST)>system_time.S
+	<$(SOURCE_GRIST)>thread.c
 	<$(SOURCE_GRIST)>tls.c
 	:
 	-fPIC -DPIC

src/system/libroot/os/arch/ppc/thread.c

@@ -0,0 +1,9 @@
+#include <OS.h>
+#include "syscalls.h"
+
+
+thread_id
+find_thread(const char *name)
+{
+	return _kern_find_thread(name);
+}

src/system/libroot/os/arch/x86/thread.c

@@ -8,8 +8,24 @@
 #include "syscalls.h"
 
 
+thread_id
+find_thread(const char *name)
+{
+	// BeOS R5 applications also use this trick as find_thread was available
+	// in BeOS R5 OS.h as inline function. Do not change storage of thread id.
+	if (!name) {
+		thread_id thread;
+		__asm__ __volatile__ ( 
+			"movl	%%fs:4, %%eax \n\t"
+			: "=a" (thread));
+		return thread;
+	}
+	return _kern_find_thread(name);
+}
+
+
 // see OS.h from BeOS R5 for the reason why we need this
-// (it's referenced there in the same way we reference _kern_find_thread())
+// there find_thread (see above) is provided as inline function
 extern thread_id _kfind_thread_(const char *name);
 
 

src/system/libroot/os/thread.c

@@ -70,13 +70,6 @@ suspend_thread(thread_id thread)
 }
 
 
-thread_id
-find_thread(const char *name)
-{
-	return _kern_find_thread(name);
-}
-
-
 status_t
 rename_thread(thread_id thread, const char *name)
 {

src/system/runtime_loader/Jamfile

@@ -15,6 +15,7 @@ KernelStaticLibraryObjects librld.a :
 	<src!system!libroot!os>syscalls.o
 	<src!system!libroot!os>sem.o
 	<src!system!libroot!os!arch!$(OBOS_ARCH)>atomic.o
+	<src!system!libroot!os!arch!$(OBOS_ARCH)>thread.o
 
 	<src!system!libroot!posix>errno.o