1 files changed, 98 insertions, 0 deletions
diff --git a/core/arch/arm/include/kernel/mutex.h b/core/arch/arm/include/kernel/mutex.h
new file mode 100644
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+++ b/core/arch/arm/include/kernel/mutex.h
@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 2014, Linaro Limited
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef KERNEL_MUTEX_H
+#define KERNEL_MUTEX_H
+
+#include <types_ext.h>
+#include <sys/queue.h>
+#include <kernel/wait_queue.h>
+
+enum mutex_value {
+	MUTEX_VALUE_UNLOCKED,
+	MUTEX_VALUE_LOCKED,
+};
+
+struct mutex {
+	enum mutex_value value;
+	unsigned spin_lock;	/* used when operating on this struct */
+	struct wait_queue wq;
+	int owner_id;
+	TAILQ_ENTRY(mutex) link;
+};
+#define MUTEX_INITIALIZER \
+	{ .value = MUTEX_VALUE_UNLOCKED, .owner_id = -1, \
+	  .wq = WAIT_QUEUE_INITIALIZER, }
+
+TAILQ_HEAD(mutex_head, mutex);
+
+void mutex_init(struct mutex *m);
+void mutex_destroy(struct mutex *m);
+
+#ifdef CFG_MUTEX_DEBUG
+void mutex_unlock_debug(struct mutex *m, const char *fname, int lineno);
+#define mutex_unlock(m) mutex_unlock_debug((m), __FILE__, __LINE__)
+
+void mutex_lock_debug(struct mutex *m, const char *fname, int lineno);
+#define mutex_lock(m) mutex_lock_debug((m), __FILE__, __LINE__)
+
+bool mutex_trylock_debug(struct mutex *m, const char *fname, int lineno);
+#define mutex_trylock(m) mutex_trylock_debug((m), __FILE__, __LINE__)
+
+#else
+void mutex_unlock(struct mutex *m);
+void mutex_lock(struct mutex *m);
+bool mutex_trylock(struct mutex *m);
+#endif
+
+
+struct condvar {
+	unsigned spin_lock;
+	struct mutex *m;
+};
+#define CONDVAR_INITIALIZER { .m = NULL }
+
+void condvar_init(struct condvar *cv);
+void condvar_destroy(struct condvar *cv);
+
+#ifdef CFG_MUTEX_DEBUG
+void condvar_signal_debug(struct condvar *cv, const char *fname, int lineno);
+#define condvar_signal(cv) condvar_signal_debug((cv), __FILE__, __LINE__)
+
+void condvar_broadcast_debug(struct condvar *cv, const char *fname, int lineno);
+#define condvar_broadcast(cv) condvar_broadcast_debug((cv), __FILE__, __LINE__)
+
+void condvar_wait_debug(struct condvar *cv, struct mutex *m,
+			const char *fname, int lineno);
+#define condvar_wait(cv, m) condvar_wait_debug((cv), (m), __FILE__, __LINE__)
+#else
+void condvar_signal(struct condvar *cv);
+void condvar_broadcast(struct condvar *cv);
+void condvar_wait(struct condvar *cv, struct mutex *m);
+#endif
+
+#endif /*KERNEL_MUTEX_H*/
+