From 28593579394d9dcf489ed190dca9b14cdc2340d9 Mon Sep 17 00:00:00 2001
From: Chris Robinson <chris.kcat@gmail.com>
Date: Wed, 15 Aug 2012 05:50:40 -0700
Subject: Add wrapper methods to ensure aligned allocations

---
 Alc/helpers.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

(limited to 'Alc/helpers.c')

diff --git a/Alc/helpers.c b/Alc/helpers.c
index 82bc5ec6..26a32b69 100644
--- a/Alc/helpers.c
+++ b/Alc/helpers.c
@@ -110,6 +110,54 @@ void FillCPUCaps(ALuint capfilter)
 }
 
 
+void *al_malloc(size_t alignment, size_t size)
+{
+#if defined(HAVE_ALIGNED_ALLOC)
+    size = (size+(alignment-1))&~(alignment-1);
+    return aligned_alloc(alignment, size);
+#elif defined(HAVE_POSIX_MEMALIGN)
+    void *ret;
+    if(posix_memalign(&ret, alignment, size) == 0)
+        return ret;
+    return NULL;
+#elif defined(HAVE__ALIGNED_MALLOC)
+    return _aligned_malloc(size, alignment);
+#else
+    char *ret = malloc(size+alignment);
+    if(ret != NULL)
+    {
+        *(ret++) = 0x00;
+        while(((ALintptrEXT)ret&(alignment-1)) != 0)
+            *(ret++) = 0xAA;
+    }
+    return ret;
+#endif
+}
+
+void *al_calloc(size_t alignment, size_t size)
+{
+    void *ret = al_malloc(alignment, size);
+    if(ret) memset(ret, 0, size);
+    return ret;
+}
+
+void al_free(void *ptr)
+{
+#if defined(HAVE_ALIGNED_ALLOC) || defined(HAVE_POSIX_MEMALIGN) ||  defined(HAVE__ALIGNED_MALLOC)
+    free(ptr);
+#else
+    if(ptr != NULL)
+    {
+        char *finder = ptr;
+        do {
+            --finder;
+        } while(*finder == 0xAA);
+        free(finder);
+    }
+    return ret;
+#endif
+}
+
 #ifdef _WIN32
 void pthread_once(pthread_once_t *once, void (*callback)(void))
 {
-- 
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