Moved some reusable code from BApplication to this shiny new place.

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@510 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/app/AppMisc.h

@@ -0,0 +1,40 @@
+//------------------------------------------------------------------------------
+//	Copyright (c) 2001-2002, OpenBeOS
+//
+//	Permission is hereby granted, free of charge, to any person obtaining a
+//	copy of this software and associated documentation files (the "Software"),
+//	to deal in the Software without restriction, including without limitation
+//	the rights to use, copy, modify, merge, publish, distribute, sublicense,
+//	and/or sell copies of the Software, and to permit persons to whom the
+//	Software is furnished to do so, subject to the following conditions:
+//
+//	The above copyright notice and this permission notice shall be included in
+//	all copies or substantial portions of the Software.
+//
+//	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+//	FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+//	DEALINGS IN THE SOFTWARE.
+//
+//	File Name:		AppMisc.h
+//	Author:			Ingo Weinhold (bonefish@users.sf.net)
+//	Description:	Miscellaneous private functionality.
+//------------------------------------------------------------------------------
+
+#ifndef _APP_MISC_H
+#define _APP_MISC_H
+
+#include <OS.h>
+#include <SupportDefs.h>
+
+struct entry_ref;
+
+status_t get_app_path(char *buffer);
+status_t get_app_ref(entry_ref *ref, bool traverse = true);
+
+thread_id main_thread_for(team_id team);
+
+#endif	// _APP_MISC_H

src/kits/app/AppMisc.cpp

@@ -0,0 +1,110 @@
+//------------------------------------------------------------------------------
+//	Copyright (c) 2001-2002, OpenBeOS
+//
+//	Permission is hereby granted, free of charge, to any person obtaining a
+//	copy of this software and associated documentation files (the "Software"),
+//	to deal in the Software without restriction, including without limitation
+//	the rights to use, copy, modify, merge, publish, distribute, sublicense,
+//	and/or sell copies of the Software, and to permit persons to whom the
+//	Software is furnished to do so, subject to the following conditions:
+//
+//	The above copyright notice and this permission notice shall be included in
+//	all copies or substantial portions of the Software.
+//
+//	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+//	FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+//	DEALINGS IN THE SOFTWARE.
+//
+//	File Name:		AppMisc.cpp
+//	Author:			Ingo Weinhold (bonefish@users.sf.net)
+//	Description:	Miscellaneous private functionality.
+//------------------------------------------------------------------------------
+
+#include <string.h>
+
+#include <AppMisc.h>
+#include <Entry.h>
+#include <image.h>
+#include <OS.h>
+
+// get_app_path
+/*!	\brief Returns the path to the application's executable.
+	\param buffer A pointer to a pre-allocated character array of at least
+		   size B_PATH_NAME_LENGTH + 1 to be filled in by this function.
+	\return
+	- \c B_OK: Everything went fine.
+	- \c B_BAD_VALUE: \c NULL \a buffer.
+	- another error code
+*/
+status_t
+get_app_path(char *buffer)
+{
+	status_t error = (buffer ? B_OK : B_BAD_VALUE);
+	image_info info;
+	int32 cookie = 0;
+	bool found = false;
+	if (error == B_OK) {
+		while (!found && get_next_image_info(0, &cookie, &info) == B_OK) {
+			if (info.type == B_APP_IMAGE) {
+				strncpy(buffer, info.name, B_PATH_NAME_LENGTH);
+				buffer[B_PATH_NAME_LENGTH] = 0;
+				found = true;
+			}
+		}
+	}
+	if (error == B_OK && !found)
+		error = B_ENTRY_NOT_FOUND;
+	return error;
+}
+
+// get_app_ref
+/*!	\brief Returns an entry_ref referring to the application's exectable.
+	\param ref A pointer to a pre-allocated entry_ref to be initialized
+		   to an entry_ref referring to the application's executable.
+	\param traverse If \c true, the function traverses symbolic links.
+	\return
+	- \c B_OK: Everything went fine.
+	- \c B_BAD_VALUE: \c NULL \a ref.
+	- another error code
+*/
+status_t
+get_app_ref(entry_ref *ref, bool traverse)
+{
+	status_t error = (ref ? B_OK : B_BAD_VALUE);
+	char appFilePath[B_PATH_NAME_LENGTH + 1];
+	if (error == B_OK)
+		error = get_app_path(appFilePath);
+	if (error == B_OK) {
+		BEntry entry(appFilePath, traverse);
+		error = entry.GetRef(ref);
+	}
+	return error;
+}
+
+// main_thread_for
+/*!	Returns the ID of the supplied team's main thread.
+	\param team The team.
+	\return
+	- The thread ID of the supplied team's main thread
+	- \c B_BAD_TEAM_ID: The supplied team ID does not identify a running team.
+	- another error code
+*/
+thread_id
+main_thread_for(team_id team)
+{
+	// For I can't find any trace of how to explicitly get the main thread,
+	// I assume the main thread is the one with the least thread ID.
+	thread_id thread = -1;
+	int32 cookie = 0;
+	thread_info info;
+	while (get_next_thread_info(team, &cookie, &info) == B_OK) {
+		if (thread < 0 || info.thread < thread)
+			thread = info.thread;
+	}
+	return thread;
+}
+