core_alloc: Provide a tiny test allocation, which can be freed for debug purposes.

This allocation can be freed in the buflib debug menu (select it to free).
Doing a another allocation, e.g. by selecting another item in this debug menu
will cause compaction (all allocs move).

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30719 a1c6a512-1295-4272-9138-f99709370657

2 files changed, 18 insertions, 0 deletions

diff --git a/firmware/core_alloc.c b/firmware/core_alloc.c
index 2250f5c664..21dd1319dd 100644
--- a/firmware/core_alloc.c
+++ b/firmware/core_alloc.c
@@ -6,6 +6,9 @@
 
 /* not static so it can be discovered by core_get_data() */
 struct buflib_context core_ctx;
+
+/* debug test alloc */
+static int test_alloc;
 void core_allocator_init(void)
 {
     buffer_init();
@@ -13,6 +16,17 @@ void core_allocator_init(void)
     void *start = buffer_get_buffer(&size);
     buflib_init(&core_ctx, start, size);
     buffer_release_buffer(size);
+
+    test_alloc = core_alloc("test", 112);
+}
+
+bool core_test_free(void)
+{
+    bool ret = test_alloc > 0;
+    if (ret)
+        test_alloc = core_free(test_alloc);
+
+    return ret;
 }
 
 int core_alloc(const char* name, size_t size)
diff --git a/firmware/include/core_alloc.h b/firmware/include/core_alloc.h
index b2edec5377..0ac7e5b73d 100644
--- a/firmware/include/core_alloc.h
+++ b/firmware/include/core_alloc.h
@@ -28,6 +28,10 @@ int  core_get_num_blocks(void);
 void core_print_block_at(int block_num, char* buf, size_t bufsize);
 #endif
 
+/* frees the debug test alloc created at initialization,
+ * since this is the first any further alloc should force a compaction run */
+bool core_test_free(void);
+
 static inline void* core_get_data(int handle)
 {
     extern struct buflib_context core_ctx;