From ae79ff4e53392f80c4e64a043800c6838ab535a0 Mon Sep 17 00:00:00 2001
From: Mike Pall <mike>
Date: Mon, 14 Nov 2011 12:01:48 +0100
Subject: [PATCH] FFI: Resolve __call metamethod for pointers, too.

---
 src/lib_ffi.c    |  5 ++++-
 src/lj_crecord.c | 19 ++++++++++++++++++-
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/src/lib_ffi.c b/src/lib_ffi.c
index 82942e44..af500118 100644
--- a/src/lib_ffi.c
+++ b/src/lib_ffi.c
@@ -207,7 +207,10 @@ LJLIB_CF(ffi_meta___concat)	LJLIB_REC(cdata_arith MM_concat)
 static int ffi_call_meta(lua_State *L, CTypeID id)
 {
   CTState *cts = ctype_cts(L);
-  cTValue *tv = lj_ctype_meta(cts, id, MM_call);
+  CType *ct = ctype_raw(cts, id);
+  cTValue *tv;
+  if (ctype_isptr(ct->info)) id = ctype_cid(ct->info);
+  tv = lj_ctype_meta(cts, id, MM_call);
   if (!tv)
     lj_err_callerv(L, LJ_ERR_FFI_BADCALL, strdata(lj_ctype_repr(L, id, NULL)));
   return lj_meta_tailcall(L, tv);
diff --git a/src/lj_crecord.c b/src/lj_crecord.c
index 3dd6f495..2c63e8a6 100644
--- a/src/lj_crecord.c
+++ b/src/lj_crecord.c
@@ -890,13 +890,30 @@ static int crec_call(jit_State *J, RecordFFData *rd, GCcdata *cd)
   return 0;
 }
 
+/* Record ctype call metamethod. */
+static void crec_call_meta(jit_State *J, RecordFFData *rd, CTypeID id)
+{
+  CTState *cts = ctype_ctsG(J2G(J));
+  CType *ct = ctype_raw(cts, id);
+  cTValue *tv;
+  if (ctype_isptr(ct->info)) id = ctype_cid(ct->info);
+  tv = lj_ctype_meta(cts, id, MM_call);
+  if (tv && tvisfunc(tv)) {
+    J->base[-1] = lj_ir_kfunc(J, funcV(tv)) | TREF_FRAME;
+    rd->nres = -1;  /* Pending tailcall. */
+  } else {
+    /* NYI: non-function metamethods. */
+    lj_trace_err(J, LJ_TRERR_BADTYPE);
+  }
+}
+
 void LJ_FASTCALL recff_cdata_call(jit_State *J, RecordFFData *rd)
 {
   GCcdata *cd = argv2cdata(J, J->base[0], &rd->argv[0]);
   if (cd->typeid == CTID_CTYPEID)
     crec_alloc(J, rd, crec_constructor(J, cd, J->base[0]));
   else if (!crec_call(J, rd, cd))
-    lj_trace_err(J, LJ_TRERR_BADTYPE);
+    crec_call_meta(J, rd, cd->typeid);
 }
 
 static TRef crec_arith_int64(jit_State *J, TRef *sp, CType **s, MMS mm)