# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1709050822 -3600
# Node ID db3da45046d67a5cf476f2999bc0c1d6d5a7336b
# Parent  a597a0af78f367018538a611cdc2e628e993b2d1
Added a convenience method for getting the current thread.

diff -r a597a0af78f3 -r db3da45046d6 libsystypes/include/systypes/thread.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libsystypes/include/systypes/thread.h	Tue Feb 27 17:20:22 2024 +0100
@@ -0,0 +1,30 @@
+/*
+ * Thread-related utilities.
+ *
+ * Copyright (C) 2024 Paul Boddie <paul@boddie.org.uk>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA  02110-1301, USA
+ */
+
+#pragma once
+
+#include <l4/sys/types.h>
+
+EXTERN_C_BEGIN
+
+l4_cap_idx_t get_current_thread();
+
+EXTERN_C_END
diff -r a597a0af78f3 -r db3da45046d6 libsystypes/lib/src/Makefile
--- a/libsystypes/lib/src/Makefile	Fri Feb 23 01:33:47 2024 +0100
+++ b/libsystypes/lib/src/Makefile	Tue Feb 27 17:20:22 2024 +0100
@@ -4,7 +4,7 @@
 TARGET		= libsystypes.so libsystypes.a
 PC_FILENAME	= libsystypes
 
-SRC_C		= base.c stat.c
+SRC_C		= base.c stat.c thread.c
 
 REQUIRES_LIBS	= l4re_c-util
 
diff -r a597a0af78f3 -r db3da45046d6 libsystypes/lib/src/thread.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libsystypes/lib/src/thread.c	Tue Feb 27 17:20:22 2024 +0100
@@ -0,0 +1,42 @@
+/*
+ * Thread-related utilities.
+ *
+ * Copyright (C) 2024 Paul Boddie <paul@boddie.org.uk>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA  02110-1301, USA
+ */
+
+#include <l4/re/env.h>
+
+#include <pthread-l4.h>
+#include <pthread.h>
+
+#include "thread.h"
+
+
+
+l4_cap_idx_t get_current_thread()
+{
+  l4_cap_idx_t thread = pthread_l4_cap(pthread_self());
+
+  /* NOTE: On MIPS32, at least, in a payload started by libexec, the main thread
+           is not necessarily returned correctly. */
+
+  if (l4_is_invalid_cap(thread))
+    return l4re_env()->main_thread;
+
+  return thread;
+}