From e5d2ac95da1ff06f9e6669b33e739c8d2784e6c3 Mon Sep 17 00:00:00 2001
From: David CARLIER <devnexen@gmail.com>
Date: Mon, 16 Jan 2023 16:47:44 +0000
Subject: [PATCH] PAL netbsd, the 10th release finally supports getrandom
 syscall. (#583)

---
 src/snmalloc/pal/pal_netbsd.h | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/snmalloc/pal/pal_netbsd.h b/src/snmalloc/pal/pal_netbsd.h
index 7539470..6e91d98 100644
--- a/src/snmalloc/pal/pal_netbsd.h
+++ b/src/snmalloc/pal/pal_netbsd.h
@@ -4,6 +4,7 @@
 #  include "pal_bsd_aligned.h"
 
 #  include <fcntl.h>
+#  include <sys/syscall.h>
 
 /**
  * We skip the pthread cancellation checkpoints by reaching directly
@@ -42,12 +43,20 @@ namespace snmalloc
       PALBSD_Aligned::pal_features | Entropy;
 
     /**
-     * Temporary solution while waiting getrandom support for the next release
+     * Temporary solution for NetBSD < 10
      * random_device seems unimplemented in clang for this platform
+     * otherwise using getrandom
      */
     static uint64_t get_entropy64()
     {
+#  if defined(SYS_getrandom)
+      uint64_t result;
+      if (getrandom(&result, sizeof(result), 0) != sizeof(result))
+        error("Failed to get system randomness");
+      return result;
+#  else
       return PALPOSIX::dev_urandom();
+#  endif
     }
   };
 } // namespace snmalloc