2nd try: Introduce a small api for loading code (codecs,plugins) from disk/memory.

It's a used by codec/plugin loading and vastly reduces code duplication. It's also a step forward in getting rid of libuisimulator in the application ports.

Apparently sh needs linker symbols prefixed with _ even if they're referenced without from C code.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27902 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 55 insertions, 0 deletions

diff --git a/firmware/export/load_code.h b/firmware/export/load_code.h
new file mode 100644
index 0000000000..f4fa8f9b46
--- /dev/null
+++ b/firmware/export/load_code.h
@@ -0,0 +1,55 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2010 by Thomas Martitz
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+
+#include "config.h"
+
+#if (CONFIG_PLATFORM & PLATFORM_NATIVE)
+#include "system.h"
+
+extern void *lc_open(const char *filename, char *buf, size_t buf_size);
+/* header is always at the beginning of the blob, and handle actually points
+ * to the start of the blob */
+static inline char *lc_open_from_mem(void* addr, size_t blob_size)
+{
+    (void)blob_size;
+    cpucache_invalidate();
+    return addr;
+}
+static inline void *lc_get_header(void *handle) { return handle; }
+/* no need to do anything */
+static inline void lc_close(void *handle) { (void)handle; }
+
+#elif (CONFIG_PLATFORM & PLATFORM_HOSTED)
+
+/* don't call these directly for loading code
+ * they're to be wrapped by platform specific functions */
+extern void *_lc_open(const char *filename, char *buf, size_t buf_size);
+extern void *_lc_get_header(void *handle);
+extern void  _lc_close(void *handle);
+
+extern void *lc_open(const char *filename, char *buf, size_t buf_size);
+/* not possiible on hosted platforms */
+extern void *lc_open_from_mem(void *addr, size_t blob_size);
+extern void *lc_get_header(void *handle);
+extern void  lc_close(void *handle);
+extern const char* lc_last_error(void);
+#endif