# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1200582390 0
# Node ID 8984cc0a1d80ebfe6a92d23bf35aea8d54914f45
# Parent 8f6640070a863aa30bfb242ad20e9a043ebe44b8
minios: add realloc
Signed-off-by: Samuel Thibault <samuel.thibault@xxxxxxxxxxxxx>
Signed-off-by: Tim Deegan <tim.deegan@xxxxxxxxxxxxx>
---
extras/mini-os/include/xmalloc.h | 3 +++
extras/mini-os/lib/xmalloc.c | 21 +++++++++++++++++++++
2 files changed, 24 insertions(+)
diff -r 8f6640070a86 -r 8984cc0a1d80 extras/mini-os/include/xmalloc.h
--- a/extras/mini-os/include/xmalloc.h Thu Jan 17 14:41:44 2008 +0000
+++ b/extras/mini-os/include/xmalloc.h Thu Jan 17 15:06:30 2008 +0000
@@ -9,12 +9,15 @@
#define malloc(size) _xmalloc(size, 4)
#define free(ptr) xfree(ptr)
+#define realloc(ptr, size) _realloc(ptr, size)
/* Free any of the above. */
extern void xfree(const void *);
/* Underlying functions */
extern void *_xmalloc(size_t size, size_t align);
+extern void *_realloc(void *ptr, size_t size);
+
static inline void *_xmalloc_array(size_t size, size_t align, size_t num)
{
/* Check for overflow. */
diff -r 8f6640070a86 -r 8984cc0a1d80 extras/mini-os/lib/xmalloc.c
--- a/extras/mini-os/lib/xmalloc.c Thu Jan 17 14:41:44 2008 +0000
+++ b/extras/mini-os/lib/xmalloc.c Thu Jan 17 15:06:30 2008 +0000
@@ -223,3 +223,24 @@ void xfree(const void *p)
/* spin_unlock_irqrestore(&freelist_lock, flags); */
}
+void *_realloc(void *ptr, size_t size)
+{
+ void *new;
+ struct xmalloc_hdr *hdr;
+
+ if (ptr == NULL)
+ return _xmalloc(size, 4);
+
+ hdr = (struct xmalloc_hdr *)ptr - 1;
+ if (hdr->size >= size)
+ return ptr;
+
+ new = _xmalloc(size, 4);
+ if (new == NULL)
+ return NULL;
+
+ memcpy(new, ptr, hdr->size);
+ xfree(ptr);
+
+ return new;
+}
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