Add pthread_self(3).

libpthread/Makefile

@@ -12,6 +12,7 @@ CXXFLAGS:=$(CXXFLAGS) -Wall -Wextra -fno-exceptions -fno-rtti
 
 OBJS=\
 pthread_initialize.o \
+pthread_self.o \
 
 BINS:=libpthread.a
 

libpthread/include/pthread.h

@@ -235,7 +235,7 @@ void pthread_initialize(void);
 /* TODO: pthread_rwlockattr_getpshared */
 /* TODO: pthread_rwlockattr_init */
 /* TODO: pthread_rwlockattr_setpshared */
-/* TODO: pthread_self */
+pthread_t pthread_self(void);
 /* TODO: pthread_setcancelstate */
 /* TODO: pthread_setcanceltype */
 /* TODO: pthread_setconcurrency */

libpthread/pthread_self.c++

@@ -0,0 +1,38 @@
+/*******************************************************************************
+
+    Copyright(C) Jonas 'Sortie' Termansen 2013.
+
+    This file is part of Sortix libpthread.
+
+    Sortix libpthread is free software: you can redistribute it and/or modify it
+    under the terms of the GNU Lesser General Public License as published by the
+    Free Software Foundation, either version 3 of the License, or (at your
+    option) any later version.
+
+    Sortix libpthread 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 Lesser General Public
+    License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with Sortix libpthread. If not, see <http://www.gnu.org/licenses/>.
+
+    pthread_self.c++
+    Returns the identity of the current thread.
+
+*******************************************************************************/
+
+#include <pthread.h>
+
+extern "C" pthread_t pthread_self(void)
+{
+	pthread_t current_thread;
+#if defined(__i386__)
+	asm ( "mov %%gs:0, %0" : "=r"(current_thread));
+#elif defined(__x86_64__)
+	asm ( "mov %%fs:0, %0" : "=r"(current_thread));
+#else
+	#error "You need to implement pthread_self for your platform"
+#endif
+	return current_thread;
+}