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-rw-r--r--common/mem.c150
1 files changed, 150 insertions, 0 deletions
diff --git a/common/mem.c b/common/mem.c
new file mode 100644
index 00000000..ad0cccf6
--- /dev/null
+++ b/common/mem.c
@@ -0,0 +1,150 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+/*
+ Copyright (C) 2010 Red Hat, Inc.
+
+ 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 program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "mem.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#ifndef MALLOC_ERROR
+#define MALLOC_ERROR(format, ...) { \
+ printf(format "\n", ## __VA_ARGS__); \
+ abort(); \
+}
+#endif
+
+char *spice_strdup(const char *str)
+{
+ char *copy;
+
+ copy = (char *)spice_malloc(strlen(str) + 1);
+ strcpy(copy, str);
+ return copy;
+}
+
+void *spice_memdup(const void *mem, size_t n_bytes)
+{
+ void *copy;
+
+ copy = spice_malloc(n_bytes);
+ memcpy(copy, mem, n_bytes);
+ return copy;
+}
+
+void *spice_malloc(size_t n_bytes)
+{
+ void *mem;
+
+ if (SPICE_LIKELY(n_bytes)) {
+ mem = malloc(n_bytes);
+
+ if (SPICE_LIKELY(mem != NULL)) {
+ return mem;
+ }
+
+ MALLOC_ERROR("spice_malloc: panic: unable to allocate %lu bytes\n",
+ (unsigned long)n_bytes);
+ }
+ return NULL;
+}
+
+void *spice_malloc0(size_t n_bytes)
+{
+ void *mem;
+
+ if (SPICE_LIKELY(n_bytes)) {
+ mem = calloc(1, n_bytes);
+
+ if (SPICE_LIKELY(mem != NULL)) {
+ return mem;
+ }
+
+ MALLOC_ERROR("spice_malloc0: panic: unable to allocate %lu bytes\n",
+ (unsigned long)n_bytes);
+ }
+ return NULL;
+}
+
+void *spice_realloc(void *mem, size_t n_bytes)
+{
+ if (SPICE_LIKELY(n_bytes)) {
+ mem = realloc(mem, n_bytes);
+
+ if (SPICE_LIKELY(mem != NULL)) {
+ return mem;
+ }
+
+ MALLOC_ERROR("spice_realloc: panic: unable to allocate %lu bytes\n",
+ (unsigned long)n_bytes);
+ }
+
+ if (mem) {
+ free(mem);
+ }
+
+ return NULL;
+}
+
+#define SIZE_OVERFLOWS(a,b) (SPICE_UNLIKELY ((a) > SIZE_MAX / (b)))
+
+void *spice_malloc_n(size_t n_blocks, size_t n_block_bytes)
+{
+ if (SIZE_OVERFLOWS (n_blocks, n_block_bytes)) {
+ MALLOC_ERROR("spice_malloc_n: overflow allocating %lu*%lu bytes",
+ (unsigned long)n_blocks, (unsigned long)n_block_bytes);
+ }
+
+ return spice_malloc(n_blocks * n_block_bytes);
+}
+
+void *spice_malloc_n_m(size_t n_blocks, size_t n_block_bytes, size_t extra_size)
+{
+ size_t size1, size2;
+ if (SIZE_OVERFLOWS (n_blocks, n_block_bytes)) {
+ MALLOC_ERROR("spice_malloc_n: overflow allocating %lu*%lu + %lubytes",
+ (unsigned long)n_blocks, (unsigned long)n_block_bytes, (unsigned long)extra_size);
+ }
+ size1 = n_blocks * n_block_bytes;
+ size2 = size1 + extra_size;
+ if (size2 < size1) {
+ MALLOC_ERROR("spice_malloc_n: overflow allocating %lu*%lu + %lubytes",
+ (unsigned long)n_blocks, (unsigned long)n_block_bytes, (unsigned long)extra_size);
+ }
+ return spice_malloc(size2);
+}
+
+
+void *spice_malloc0_n(size_t n_blocks, size_t n_block_bytes)
+{
+ if (SIZE_OVERFLOWS (n_blocks, n_block_bytes)) {
+ MALLOC_ERROR("spice_malloc0_n: overflow allocating %lu*%lu bytes",
+ (unsigned long)n_blocks, (unsigned long)n_block_bytes);
+ }
+
+ return spice_malloc0 (n_blocks * n_block_bytes);
+}
+
+void *spice_realloc_n(void *mem, size_t n_blocks, size_t n_block_bytes)
+{
+ if (SIZE_OVERFLOWS (n_blocks, n_block_bytes)) {
+ MALLOC_ERROR("spice_realloc_n: overflow allocating %lu*%lu bytes",
+ (unsigned long)n_blocks, (unsigned long)n_block_bytes);
+ }
+
+ return spice_realloc(mem, n_blocks * n_block_bytes);
+}