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-rw-r--r--src/malloc.c23
1 files changed, 21 insertions, 2 deletions
diff --git a/src/malloc.c b/src/malloc.c
index c6c1629..1a0913c 100644
--- a/src/malloc.c
+++ b/src/malloc.c
@@ -40,6 +40,25 @@
/**
+ * Return the pagesize. If it it cannot be retrieved,
+ * use a fallback value.
+ *
+ * @return The pagesize, or a fallback value.
+ */
+__attribute__((__warn_unused_result__, const))
+static size_t get_pagesize(void)
+{
+ static size_t pagesize = 0;
+ if (pagesize == 0)
+ {
+ long r = sysconf(_SC_PAGESIZE);
+ pagesize = (size_t)(r == -1 ? 4096 : r);
+ }
+ return pagesize;
+}
+
+
+/**
* Create a new memory allocation on the heap.
* The allocation will not be initialised.
* The returned pointer is unaligned.
@@ -377,7 +396,7 @@ int posix_memalign(void** ptrptr, size_t boundary, size_t size)
*/
void* valloc(size_t size)
{
- return memalign((size_t)sysconf(_SC_PAGESIZE), size);
+ return memalign(get_pagesize(), size);
}
@@ -402,7 +421,7 @@ void* valloc(size_t size)
*/
void* pvalloc(size_t size)
{
- size_t boundary = (size_t)sysconf(_SC_PAGESIZE);
+ size_t boundary = get_pagesize();
size_t full_size = 2 * sizeof(size_t) + boundary - 1 + size;
size_t rounding = 0;