Mojo + NaCl prototype.

mojo/monacl/gen/libmojo.cc.template

Index: mojo/monacl/gen/libmojo.cc.template
diff --git a/mojo/monacl/gen/libmojo.cc.template b/mojo/monacl/gen/libmojo.cc.template
new file mode 100644
index 0000000000000000000000000000000000000000..cd7edb15aef7b72615f5a741b42ad4a98ea3f74d
--- /dev/null
+++ b/mojo/monacl/gen/libmojo.cc.template
@@ -0,0 +1,27 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+

[Mark Seaborn, 2014/08/26 16:25:52]

Could you name this "*template.cc" so that it gets checked by tools?

[Nick Bray (chromium), 2014/09/03 23:45:02]

I suspect the fact it isn't a syntactically valid .cc means this would be asking
for trouble.

+// WARNING this file was generated by $script_name

[Mark Seaborn, 2014/08/26 16:25:52]

Rather confusing because this file *isn't* generated.  Can you have the script
add this comment instead?

[Nick Bray (chromium), 2014/09/03 23:45:02]

Done.

+// Do not edit by hand.
+
+#include <errno.h>
+
+#include "mojo/public/c/system/core.h"
+#include "native_client/src/public/imc_syscalls.h"
+#include "native_client/src/public/imc_types.h"
+
+#define NACL_MOJO_DESC 8

[Mark Seaborn, 2014/08/26 16:25:52]

No need to hard-code this.  Use NACL_CHROME_DESC_BASE instead.

[Nick Bray (chromium), 2014/09/03 23:45:02]

Done, but it doesn't seem right to add a dependance on chrome_main.h.  Thoughts?

[Mark Seaborn, 2014/09/09 19:13:10]

It seems right to me.

+
+static void DoMojoCall(uint32_t params[], int numParams) {
+  NaClAbiNaClImcMsgIoVec iov[1] = {
+    {params, numParams}

[Mark Seaborn, 2014/08/26 16:25:52]

Style nit: num_params

[Nick Bray (chromium), 2014/09/03 23:45:02]

Done.

+  };
+  NaClAbiNaClImcMsgHdr msgh = {iov, 1, NULL, 0};
+  // Note: return value unchecked.  We're relying on the result parameter being
+  // unmodified - if the syscall fails, the Mojo function will return whatever
+  // the result parameter was initialized to before this function was called.
+  imc_sendmsg(NACL_MOJO_DESC, &msgh, 0);
+}
+
+$body