Add pthread_mutex_lock(3) and pthread_mutex_unlock(3).

libpthread/Makefile

@@ -13,6 +13,8 @@ CXXFLAGS:=$(CXXFLAGS) -Wall -Wextra -fno-exceptions -fno-rtti
 OBJS=\
 pthread_equal.o \
 pthread_initialize.o \
+pthread_mutex_lock.o \
+pthread_mutex_unlock.o \
 pthread_self.o \
 
 BINS:=libpthread.a

libpthread/include/__/pthread.h

@@ -45,7 +45,23 @@ typedef int __pthread_condattr_t;
 
 typedef int __pthread_key_t;
 
-typedef int __pthread_mutex_t;
+#if defined(__is_sortix_libpthread)
+typedef struct
+{
+	unsigned long lock;
+	unsigned long type;
+	unsigned long owner;
+	unsigned long recursion;
+} __pthread_mutex_t;
+#else
+typedef struct
+{
+	unsigned long __pthread_lock;
+	unsigned long __pthread_type;
+	unsigned long __pthread_owner;
+	unsigned long __pthread_recursion;
+} __pthread_mutex_t;
+#endif
 
 typedef int __pthread_mutexattr_t;
 

libpthread/include/pthread.h

@@ -55,10 +55,10 @@ __BEGIN_DECLS
 /* TODO: #define PTHREAD_CREATE_JOINABLE */
 /* TODO: #define PTHREAD_EXPLICIT_SCHED */
 /* TODO: #define PTHREAD_INHERIT_SCHED */
-/* TODO: #define PTHREAD_MUTEX_DEFAULT */
+#define PTHREAD_MUTEX_DEFAULT PTHREAD_MUTEX_NORMAL
 /* TODO: #define PTHREAD_MUTEX_ERRORCHECK */
-/* TODO: #define PTHREAD_MUTEX_NORMAL */
+#define PTHREAD_MUTEX_NORMAL 0
-/* TODO: #define PTHREAD_MUTEX_RECURSIVE */
+#define PTHREAD_MUTEX_RECURSIVE 1
 /* TODO: #define PTHREAD_MUTEX_ROBUST */
 /* TODO: #define PTHREAD_MUTEX_STALLED */
 /* TODO: #define PTHREAD_ONCE_INIT */
@@ -143,9 +143,12 @@ struct pthread
 #endif
 
 #define PTHREAD_COND_INITIALIZER 0
-#define PTHREAD_MUTEX_INITIALIZER 0
+#define PTHREAD_MUTEX_INITIALIZER { 0, PTHREAD_MUTEX_DEFAULT, 0, 0 }
 #define PTHREAD_RWLOCK_INITIALIZER 0
 
+#define PTHREAD_NORMAL_MUTEX_INITIALIZER_NP { 0, PTHREAD_MUTEX_NORMAL, 0, 0 }
+#define PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP { 0, PTHREAD_MUTEX_RECURSIVE, 0, 0 }
+
 void pthread_initialize(void);
 
 /* TODO: pthread_atfork */
@@ -204,11 +207,11 @@ int pthread_equal(pthread_t, pthread_t);
 /* TODO: pthread_mutex_destroy */
 /* TODO: pthread_mutex_getprioceiling */
 /* TODO: pthread_mutex_init */
-/* TODO: pthread_mutex_lock */
+int pthread_mutex_lock(pthread_mutex_t*);
 /* TODO: pthread_mutex_setprioceiling */
 /* TODO: pthread_mutex_timedlock */
 /* TODO: pthread_mutex_trylock */
-/* TODO: pthread_mutex_unlock */
+int pthread_mutex_unlock(pthread_mutex_t*);
 /* TODO: pthread_mutexattr_destroy */
 /* TODO: pthread_mutexattr_getprioceiling */
 /* TODO: pthread_mutexattr_getprotocol */

libpthread/pthread_mutex_lock.c++

@@ -0,0 +1,45 @@
+/*******************************************************************************
+
+    Copyright(C) Jonas 'Sortie' Termansen 2013, 2014.
+
+    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_mutex_lock.c++
+    Locks a mutex.
+
+*******************************************************************************/
+
+#include <pthread.h>
+#include <sched.h>
+#include <time.h>
+#include <timespec.h>
+
+static const unsigned long UNLOCKED_VALUE = 0;
+static const unsigned long LOCKED_VALUE = 1;
+
+extern "C" int pthread_mutex_lock(pthread_mutex_t* mutex)
+{
+	while ( !__sync_bool_compare_and_swap(&mutex->lock, UNLOCKED_VALUE, LOCKED_VALUE) )
+	{
+		if ( mutex->type == PTHREAD_MUTEX_RECURSIVE &&
+		     (pthread_t) mutex->owner == pthread_self() )
+				return mutex->recursion++, 0;
+		sched_yield();
+	}
+	mutex->owner = (unsigned long) pthread_self();
+	mutex->recursion = 0;
+	return 0;
+}

libpthread/pthread_mutex_unlock.c++

@@ -0,0 +1,37 @@
+/*******************************************************************************
+
+    Copyright(C) Jonas 'Sortie' Termansen 2013, 2014.
+
+    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_mutex_unlock.c++
+    Unlocks a mutex.
+
+*******************************************************************************/
+
+#include <pthread.h>
+
+static const unsigned long UNLOCKED_VALUE = 0;
+static const unsigned long LOCKED_VALUE = 1;
+
+extern "C" int pthread_mutex_unlock(pthread_mutex_t* mutex)
+{
+	if ( mutex->type == PTHREAD_MUTEX_RECURSIVE && mutex->recursion )
+		return mutex->recursion--, 0;
+	mutex->owner = 0;
+	mutex->lock = UNLOCKED_VALUE;
+	return 0;
+}