1 files changed, 68 insertions, 0 deletions
diff --git a/core/include/kernel/handle.h b/core/include/kernel/handle.h
new file mode 100644
index 0000000..2cfd2e6
--- /dev/null
+++ b/core/include/kernel/handle.h
@@ -0,0 +1,68 @@
+/*
+ * 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_HANDLE_H
+#define KERNEL_HANDLE_H
+
+#include <stdint.h>
+
+struct handle_db {
+	void **ptrs;
+	size_t max_ptrs;
+};
+
+#define HANDLE_DB_INITIALIZER { NULL, 0 }
+
+/*
+ * Frees all internal data structures of the database, but does not free
+ * the db pointer. The database is safe to reuse after it's destroyed, it
+ * just be empty again.
+ */
+void handle_db_destroy(struct handle_db *db);
+
+/*
+ * Allocates a new handle and assigns the supplied pointer to it,
+ * ptr must not be NULL.
+ * The function returns
+ * >= 0 on success and
+ * -1 on failure
+ */
+int handle_get(struct handle_db *db, void *ptr);
+
+/*
+ * Deallocates a handle. Returns the assiciated pointer of the handle
+ * the the handle was valid or NULL if it's invalid.
+ */
+void *handle_put(struct handle_db *db, int handle);
+
+/*
+ * Returns the assiciated pointer of the handle if the handle is a valid
+ * handle.
+ * Returns NULL on failure.
+ */
+void *handle_lookup(struct handle_db *db, int handle);
+
+#endif /*KERNEL_HANDLE_H*/