Add RTL allocator.

Add a custom allocator that can be hooked. The default heap allocator
in this code does nothing more than wrap the libc heap allocator.

Fix up the RTL initialise to better handle the locking and
initialisation of internal structures.

1 files changed, 47 insertions, 0 deletions

diff --git a/rtl-alloc-heap.h b/rtl-alloc-heap.h
new file mode 100644
index 0000000..b31a3db
--- /dev/null
+++ b/rtl-alloc-heap.h
@@ -0,0 +1,47 @@
+/*
+ *  COPYRIGHT (c) 2012 Chris Johns <chrisj@rtems.org>
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.org/license/LICENSE.
+ */
+/**
+ * @file
+ *
+ * @ingroup rtems_rtl
+ *
+ * @brief RTEMS Run-Time Linker Allocator for the standard heap.
+ */
+
+#if !defined (_RTEMS_RTL_ALLOC_HEAP_H_)
+#define _RTEMS_RTL_ALLOC_HEAP_H_
+
+#include <rtl-allocator.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/**
+ * Allocator handler for the standard libc heap.
+ *
+ * @param allocation If true the request is to allocate memory else free.
+ * @param tag The type of allocation request.
+ * @param address Pointer to the memory address. If an allocation the value is
+ *                unspecific on entry and the allocated address or NULL on
+ *                exit. The NULL value means the allocation failed. If a delete
+ *                or free request the memory address is the block to free. A
+ *                free request of NULL is silently ignored.
+ * @param size The size of the allocation if an allocation request and
+ *             not used if deleting or freeing a previous allocation.
+ */
+void rtems_rtl_alloc_heap(bool                  allocate,
+                          rtems_rtl_alloc_tag_t tag,
+                          void**                address,
+                          size_t                size);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif