diff --git a/src/os/unix/ngx_alloc.c b/src/os/unix/ngx_alloc.c
new file mode 100644
index 0000000..69925d1
--- /dev/null
+++ b/src/os/unix/ngx_alloc.c
@@ -0,0 +1,75 @@
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+
+
+int ngx_pagesize;
+
+
+void *ngx_alloc(size_t size, ngx_log_t *log)
+{
+    void  *p;
+
+    if (!(p = malloc(size))) {
+        ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
+                      "malloc() " SIZE_T_FMT " bytes failed", size);
+    }
+
+    ngx_log_debug2(NGX_LOG_DEBUG_ALLOC, log, 0,
+                   "malloc: " PTR_FMT ":" SIZE_T_FMT, p, size);
+
+    return p;
+}
+
+
+void *ngx_calloc(size_t size, ngx_log_t *log)
+{
+    void  *p;
+
+    p = ngx_alloc(size, log);
+
+    if (p) {
+        ngx_memzero(p, size);
+    }
+
+    return p;
+}
+
+
+#if (HAVE_POSIX_MEMALIGN)
+
+void *ngx_memalign(size_t aligment, size_t size, ngx_log_t *log)
+{
+    void  *p;
+
+    if (posix_memalign(&p, aligment, size) == -1) {
+        ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
+                      "posix_memalign() " SIZE_T_FMT " bytes aligned to "
+                      SIZE_T_FMT " failed", size, alignment);
+    }
+
+    ngx_log_debug2(NGX_LOG_DEBUG_ALLOC, log, 0,
+                   "posix_memalign: " PTR_FMT ":" SIZE_T_FMT, p, size);
+
+    return p;
+}
+
+#esif (HAVE_MEMALIGN)
+
+void *ngx_memalign(size_t aligment, size_t size, ngx_log_t *log)
+{
+    void  *p;
+
+    if (!(p = memalign(aligment, size))) {
+        ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
+                      "memalign() " SIZE_T_FMT " bytes aligned to "
+                      SIZE_T_FMT " failed", size, alignment);
+    }
+
+    ngx_log_debug2(NGX_LOG_DEBUG_ALLOC, log, 0,
+                   "memalign: " PTR_FMT ":" SIZE_T_FMT, p, size);
+
+    return p;
+}
+
+#endif