[Xen-devel] [RFC 3/6] Introduce _xrealloc

[Sameer Goel <sgoel@xxxxxxxxxxxxxx>]

Introduce a memory realloc function.

Signed-off-by: Sameer Goel <sgoel@xxxxxxxxxxxxxx>
---
 xen/common/xmalloc_tlsf.c | 13 +++++++++++++
 xen/include/xen/xmalloc.h |  1 +
 2 files changed, 14 insertions(+)

diff --git a/xen/common/xmalloc_tlsf.c b/xen/common/xmalloc_tlsf.c
index b256dc5..52385a8 100644
--- a/xen/common/xmalloc_tlsf.c
+++ b/xen/common/xmalloc_tlsf.c
@@ -612,6 +612,19 @@ void *_xzalloc(unsigned long size, unsigned long align)
     return p ? memset(p, 0, size) : p;
 }
 
+void *_xrealloc(void *p, unsigned long new_size, unsigned long align)
+{
+    void *new_p = _xmalloc(new_size, align);
+
+    if(new_p && p)
+    {
+        memcpy(new_p, p, new_size);
+        xfree(p);
+    }
+
+    return new_p;
+}
+
 void xfree(void *p)
 {
     struct bhdr *b;
diff --git a/xen/include/xen/xmalloc.h b/xen/include/xen/xmalloc.h
index 24a99ac..41a9b2f 100644
--- a/xen/include/xen/xmalloc.h
+++ b/xen/include/xen/xmalloc.h
@@ -29,6 +29,7 @@ extern void xfree(void *);
 /* Underlying functions */
 extern void *_xmalloc(unsigned long size, unsigned long align);
 extern void *_xzalloc(unsigned long size, unsigned long align);
+extern void *_xrealloc(void *p, unsigned long new_size, unsigned long align);
 
 static inline void *_xmalloc_array(
     unsigned long size, unsigned long align, unsigned long num)
-- 
Qualcomm Datacenter Technologies as an affiliate of Qualcomm Technologies, Inc. 
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux 
Foundation Collaborative Project.


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