From 5b6e714d05a0c96ade618256a67a9cb7f337f196 Mon Sep 17 00:00:00 2001
From: Roy Frostig <rfrostig@mozilla.com>
Date: Sun, 25 Jul 2010 21:45:09 -0700
Subject: Expose an RNG (the one used by our runtime) to Rust via std.

---
 src/rt/rust_builtin.cpp | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

(limited to 'src/rt/rust_builtin.cpp')

diff --git a/src/rt/rust_builtin.cpp b/src/rt/rust_builtin.cpp
index 99fa9535..e8d2d67d 100644
--- a/src/rt/rust_builtin.cpp
+++ b/src/rt/rust_builtin.cpp
@@ -127,6 +127,31 @@ vec_len(rust_task *task, type_desc *ty, rust_vec *v)
     return v->fill / ty->size;
 }
 
+extern "C" CDECL void *
+rand_new(rust_task *task)
+{
+    rust_dom *dom = task->dom;
+    randctx *rctx = (randctx *) task->malloc(sizeof(randctx));
+    if (!rctx) {
+        task->fail(1);
+        return NULL;
+    }
+    isaac_init(dom, rctx);
+    return rctx;
+}
+
+extern "C" CDECL size_t
+rand_next(rust_task *task, randctx *rctx)
+{
+    return rand(rctx);
+}
+
+extern "C" CDECL void
+rand_free(rust_task *task, randctx *rctx)
+{
+    task->free(rctx);
+}
+
 //
 // Local Variables:
 // mode: C++
-- 
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