[PATCH v8 20/21] xl: introduce xcalloc

[Wei Liu <wei.liu2@citrix.com>]

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: Ian Jackson <ian.jackson@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
---
Changes in v6:
1. Join two lines to make code more compact.
2. Use %zu and drop casting.
---
 tools/libxl/xl_cmdimpl.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/tools/libxl/xl_cmdimpl.c b/tools/libxl/xl_cmdimpl.c
index 5c40e84..5b45213 100644
--- a/tools/libxl/xl_cmdimpl.c
+++ b/tools/libxl/xl_cmdimpl.c
@@ -289,6 +289,16 @@ static void *xmalloc(size_t sz) {
     return r;
 }
 
+static void *xcalloc(size_t n, size_t sz) __attribute__((unused));
+static void *xcalloc(size_t n, size_t sz) {
+    void *r = calloc(n, sz);
+    if (!r) {
+        fprintf(stderr,"xl: Unable to calloc %zu bytes.\n", sz*n);
+        exit(-ERROR_FAIL);
+    }
+    return r;
+}
+
 static void *xrealloc(void *ptr, size_t sz) {
     void *r;
     if (!sz) { free(ptr); return 0; }
-- 
1.9.1